{"transactions":[{"id":2776200,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock option (right to buy)","published_at":"2021-03-22T20:04:46.000Z","date":"2021-03-18","kind":"exercise","acquired":false,"shares":12229,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"25% of the 30,895 shares originally subject to the option vested on August 1, 2020, and the remaining shares vest in 36 equal monthly installments thereafter."}],"balance_after":18666,"derivative":{"exercise_price":16,"expiration_date":"2029-07-23","underlying":"Common Stock","underlying_shares":12229},"source":{"system":"sec-edgar","filing":"0001447362-21-000057","document":"wf-form4_161644347105756.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736221000057/wf-form4_161644347105756.xml","form_type":"4"}},{"id":2776199,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-03-22T20:04:46.000Z","date":"2021-03-18","kind":"exercise","acquired":true,"shares":12229,"price":16,"value":195664.0,"ownership":{"direct":true},"balance_after":124407,"source":{"system":"sec-edgar","filing":"0001447362-21-000057","document":"wf-form4_161644347105756.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736221000057/wf-form4_161644347105756.xml","form_type":"4"}},{"id":2937773,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-12-18T20:59:41.000Z","date":"2020-12-16","kind":"sale","acquired":false,"shares":100,"price":67.585,"value":6758.5,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F17","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 LP on August 13, 2020, as amended on September 10, 2020."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":628410,"source":{"system":"sec-edgar","filing":"0001447362-20-000295","document":"wf-form4_160832516916494.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":16,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000295/wf-form4_160832516916494.xml","form_type":"4"}},{"id":2937772,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-12-18T20:59:41.000Z","date":"2020-12-16","kind":"sale","acquired":false,"shares":3461,"price":67.02,"value":231956.22,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F17","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 LP on August 13, 2020, as amended on September 10, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F20","text":"This transaction was executed in multiple trades at prices ranging from $66.580 to $67.565, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":628510,"source":{"system":"sec-edgar","filing":"0001447362-20-000295","document":"wf-form4_160832516916494.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":15,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000295/wf-form4_160832516916494.xml","form_type":"4"}},{"id":2937771,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-12-18T20:59:41.000Z","date":"2020-12-16","kind":"sale","acquired":false,"shares":8875,"price":66.176,"value":587312.0,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F17","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 LP on August 13, 2020, as amended on September 10, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F19","text":"This transaction was executed in multiple trades at prices ranging from $65.570 to $66.560, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":631971,"source":{"system":"sec-edgar","filing":"0001447362-20-000295","document":"wf-form4_160832516916494.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":14,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000295/wf-form4_160832516916494.xml","form_type":"4"}},{"id":2937770,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-12-18T20:59:41.000Z","date":"2020-12-16","kind":"sale","acquired":false,"shares":1400,"price":65.239,"value":91334.6,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F17","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 LP on August 13, 2020, as amended on September 10, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F18","text":"This transaction was executed in multiple trades at prices ranging from $64.550 to $65.520, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":640846,"source":{"system":"sec-edgar","filing":"0001447362-20-000295","document":"wf-form4_160832516916494.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000295/wf-form4_160832516916494.xml","form_type":"4"}},{"id":2937769,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-12-18T20:59:41.000Z","date":"2020-12-16","kind":"sale","acquired":false,"shares":100,"price":67.88,"value":6788.0,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F13","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 QP LP on August 13, 2020, as amended on September 10, 2020."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":642246,"source":{"system":"sec-edgar","filing":"0001447362-20-000295","document":"wf-form4_160832516916494.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000295/wf-form4_160832516916494.xml","form_type":"4"}},{"id":2937768,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-12-18T20:59:41.000Z","date":"2020-12-16","kind":"sale","acquired":false,"shares":3762,"price":67.203,"value":252817.686,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F13","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 QP LP on August 13, 2020, as amended on September 10, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F16","text":"This transaction was executed in multiple trades at prices ranging from $66.660 to $67.600, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":642346,"source":{"system":"sec-edgar","filing":"0001447362-20-000295","document":"wf-form4_160832516916494.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000295/wf-form4_160832516916494.xml","form_type":"4"}},{"id":2937767,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-12-18T20:59:41.000Z","date":"2020-12-16","kind":"sale","acquired":false,"shares":10102,"price":66.224,"value":668994.848,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F13","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 QP LP on August 13, 2020, as amended on September 10, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F15","text":"This transaction was executed in multiple trades at prices ranging from $65.630 to $66.600, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":646108,"source":{"system":"sec-edgar","filing":"0001447362-20-000295","document":"wf-form4_160832516916494.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000295/wf-form4_160832516916494.xml","form_type":"4"}},{"id":2937766,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-12-18T20:59:41.000Z","date":"2020-12-16","kind":"sale","acquired":false,"shares":2100,"price":65.357,"value":137249.7,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F13","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 QP LP on August 13, 2020, as amended on September 10, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F14","text":"This transaction was executed in multiple trades at prices ranging from $64.630 to $65.590, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":656210,"source":{"system":"sec-edgar","filing":"0001447362-20-000295","document":"wf-form4_160832516916494.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000295/wf-form4_160832516916494.xml","form_type":"4"}},{"id":2937765,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-12-18T20:59:41.000Z","date":"2020-12-16","kind":"sale","acquired":false,"shares":13705,"price":67.667,"value":927376.235,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F6","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC Venture Partners 2013, L.P. (\"MGC 2013 LP\") on August 13, 2020, as amended on September 10, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F12","text":"This transaction was executed in multiple trades at prices ranging from $67.500 to $67.790, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":658310,"source":{"system":"sec-edgar","filing":"0001447362-20-000295","document":"wf-form4_160832516916494.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000295/wf-form4_160832516916494.xml","form_type":"4"}},{"id":2937764,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-12-18T20:59:41.000Z","date":"2020-12-16","kind":"sale","acquired":false,"shares":30218,"price":66.979,"value":2023971.422,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F6","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC Venture Partners 2013, L.P. (\"MGC 2013 LP\") on August 13, 2020, as amended on September 10, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F11","text":"This transaction was executed in multiple trades at prices ranging from $66.500 to $67.485, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":672015,"source":{"system":"sec-edgar","filing":"0001447362-20-000295","document":"wf-form4_160832516916494.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000295/wf-form4_160832516916494.xml","form_type":"4"}},{"id":2937763,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-12-18T20:59:41.000Z","date":"2020-12-16","kind":"sale","acquired":false,"shares":57240,"price":66.051,"value":3780759.24,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F6","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC Venture Partners 2013, L.P. (\"MGC 2013 LP\") on August 13, 2020, as amended on September 10, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F10","text":"This transaction was executed in multiple trades at prices ranging from $65.500 to $66.490, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":702233,"source":{"system":"sec-edgar","filing":"0001447362-20-000295","document":"wf-form4_160832516916494.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000295/wf-form4_160832516916494.xml","form_type":"4"}},{"id":2937762,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-12-18T20:59:41.000Z","date":"2020-12-16","kind":"sale","acquired":false,"shares":18837,"price":65.232,"value":1228775.184,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F6","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC Venture Partners 2013, L.P. (\"MGC 2013 LP\") on August 13, 2020, as amended on September 10, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"This transaction was executed in multiple trades at prices ranging from $64.500 to $65.490, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":759473,"source":{"system":"sec-edgar","filing":"0001447362-20-000295","document":"wf-form4_160832516916494.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000295/wf-form4_160832516916494.xml","form_type":"4"}},{"id":2937761,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-12-18T20:59:41.000Z","date":"2020-12-16","kind":"sale","acquired":false,"shares":600,"price":67.659,"value":40595.4,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on September 10, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"This transaction was executed in multiple trades at prices ranging from $67.565 to $67.880, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":112178,"source":{"system":"sec-edgar","filing":"0001447362-20-000295","document":"wf-form4_160832516916494.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000295/wf-form4_160832516916494.xml","form_type":"4"}},{"id":2937760,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-12-18T20:59:41.000Z","date":"2020-12-16","kind":"sale","acquired":false,"shares":2163,"price":66.759,"value":144399.717,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on September 10, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"This transaction was executed in multiple trades at prices ranging from $66.530 to $67.190, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":112778,"source":{"system":"sec-edgar","filing":"0001447362-20-000295","document":"wf-form4_160832516916494.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000295/wf-form4_160832516916494.xml","form_type":"4"}},{"id":2937759,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-12-18T20:59:41.000Z","date":"2020-12-16","kind":"sale","acquired":false,"shares":12271,"price":65.974,"value":809566.954,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on September 10, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"This transaction was executed in multiple trades at prices ranging from $65.530 to $66.500, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":114941,"source":{"system":"sec-edgar","filing":"0001447362-20-000295","document":"wf-form4_160832516916494.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000295/wf-form4_160832516916494.xml","form_type":"4"}},{"id":2937758,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-12-18T20:59:41.000Z","date":"2020-12-16","kind":"sale","acquired":false,"shares":4966,"price":65.272,"value":324140.752,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on September 10, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $64.530 to $65.520, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":127212,"source":{"system":"sec-edgar","filing":"0001447362-20-000295","document":"wf-form4_160832516916494.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000295/wf-form4_160832516916494.xml","form_type":"4"}},{"id":2946426,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-12-14T18:58:08.000Z","date":"2020-12-11","kind":"sale","acquired":false,"shares":100,"price":62.304,"value":6230.4,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F9","text":"This transaction was made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 QP LP on August 13, 2020, as amended on September 10, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F10","text":"This transaction was executed in multiple trades at prices ranging from $62.300 to $62.320, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":778310,"source":{"system":"sec-edgar","filing":"0001447362-20-000285","document":"wf-form4_160797227377113.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000285/wf-form4_160797227377113.xml","form_type":"4"}},{"id":2946425,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-12-14T18:58:08.000Z","date":"2020-12-11","kind":"sale","acquired":false,"shares":493,"price":62.024,"value":30577.832,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"This transaction was made pursuant to a Rule 10b5-1 plan adopted by MGC Venture Partners 2013, L.P. (\"MGC 2013 LP\") on August 13, 2020, as amended on September 10, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F8","text":"This transaction was executed in multiple trades at prices ranging from $62.000 to $62.080, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":778410,"source":{"system":"sec-edgar","filing":"0001447362-20-000285","document":"wf-form4_160797227377113.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000285/wf-form4_160797227377113.xml","form_type":"4"}},{"id":2946424,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-12-14T18:58:08.000Z","date":"2020-12-11","kind":"sale","acquired":false,"shares":500,"price":60.34,"value":30170.0,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"This transaction was made pursuant to a Rule 10b5-1 plan adopted by MGC Venture Partners 2013, L.P. (\"MGC 2013 LP\") on August 13, 2020, as amended on September 10, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"This transaction was executed in multiple trades at prices ranging from $60.170 to $60.590, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":778903,"source":{"system":"sec-edgar","filing":"0001447362-20-000285","document":"wf-form4_160797227377113.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000285/wf-form4_160797227377113.xml","form_type":"4"}},{"id":2946423,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-12-14T18:58:08.000Z","date":"2020-12-11","kind":"sale","acquired":false,"shares":13566,"price":59.53,"value":807583.98,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"This transaction was made pursuant to a Rule 10b5-1 plan adopted by MGC Venture Partners 2013, L.P. (\"MGC 2013 LP\") on August 13, 2020, as amended on September 10, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"This transaction was executed in multiple trades at prices ranging from $59.150 to $60.100, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":779403,"source":{"system":"sec-edgar","filing":"0001447362-20-000285","document":"wf-form4_160797227377113.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000285/wf-form4_160797227377113.xml","form_type":"4"}},{"id":2946422,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-12-14T18:58:08.000Z","date":"2020-12-11","kind":"sale","acquired":false,"shares":10000,"price":59.884,"value":598840.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on September 10, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $59.750 to $60.295, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":132178,"source":{"system":"sec-edgar","filing":"0001447362-20-000285","document":"wf-form4_160797227377113.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000285/wf-form4_160797227377113.xml","form_type":"4"}},{"id":2948590,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-12-11T22:59:39.000Z","date":"2020-12-10","kind":"sale","acquired":false,"shares":4612,"price":59.21,"value":273076.52,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F10","text":"This transaction was made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 LP on August 13, 2020, as amended on September 10, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F8","text":"These transactions were executed in multiple trades at prices ranging from $59.15 to $59.39, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":792969,"source":{"system":"sec-edgar","filing":"0001447362-20-000278","document":"wf-form4_160772756746405.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000278/wf-form4_160772756746405.xml","form_type":"4"}},{"id":2948589,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-12-11T22:59:39.000Z","date":"2020-12-10","kind":"sale","acquired":false,"shares":5388,"price":59.21,"value":319023.48,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F9","text":"This transaction was made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 QP LP on August 13, 2020, as amended on September 10, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F8","text":"These transactions were executed in multiple trades at prices ranging from $59.15 to $59.39, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":797581,"source":{"system":"sec-edgar","filing":"0001447362-20-000278","document":"wf-form4_160772756746405.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000278/wf-form4_160772756746405.xml","form_type":"4"}},{"id":2948588,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-12-11T22:59:39.000Z","date":"2020-12-10","kind":"sale","acquired":false,"shares":35441,"price":59.17,"value":2097043.97,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC Venture Partners 2013, L.P. (\"MGC 2013 LP\") on August 13, 2020, as amended on September 10, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F8","text":"These transactions were executed in multiple trades at prices ranging from $59.15 to $59.39, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":802969,"source":{"system":"sec-edgar","filing":"0001447362-20-000278","document":"wf-form4_160772756746405.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000278/wf-form4_160772756746405.xml","form_type":"4"}},{"id":2948587,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-12-11T22:59:39.000Z","date":"2020-12-09","kind":"sale","acquired":false,"shares":4683,"price":57.43,"value":268944.69,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC Venture Partners 2013, L.P. (\"MGC 2013 LP\") on August 13, 2020, as amended on September 10, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"This transaction was executed in multiple trades at prices ranging from $57.15 to $57.98, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":838410,"source":{"system":"sec-edgar","filing":"0001447362-20-000278","document":"wf-form4_160772756746405.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000278/wf-form4_160772756746405.xml","form_type":"4"}},{"id":2948586,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-12-11T22:59:39.000Z","date":"2020-12-09","kind":"sale","acquired":false,"shares":18141,"price":56.74,"value":1029320.34,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC Venture Partners 2013, L.P. (\"MGC 2013 LP\") on August 13, 2020, as amended on September 10, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"This transaction was executed in multiple trades at prices ranging from $56.15 to $57.13, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":843093,"source":{"system":"sec-edgar","filing":"0001447362-20-000278","document":"wf-form4_160772756746405.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000278/wf-form4_160772756746405.xml","form_type":"4"}},{"id":2948585,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-12-11T22:59:39.000Z","date":"2020-12-09","kind":"sale","acquired":false,"shares":10000,"price":57.9,"value":579000.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on September 10, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $57.75 to $58.32, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":142178,"source":{"system":"sec-edgar","filing":"0001447362-20-000278","document":"wf-form4_160772756746405.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000278/wf-form4_160772756746405.xml","form_type":"4"}},{"id":2951642,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-12-09T22:24:54.000Z","date":"2020-12-08","kind":"sale","acquired":false,"shares":4612,"price":56.204,"value":259212.848,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F10","text":"This transaction was made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 LP on August 13, 2020, as amended on September 10, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F11","text":"This transaction was executed in multiple trades at prices ranging from $56.150 to $56.590, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":861234,"source":{"system":"sec-edgar","filing":"0001447362-20-000276","document":"wf-form4_160755268101477.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000276/wf-form4_160755268101477.xml","form_type":"4"}},{"id":2951641,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-12-09T22:24:54.000Z","date":"2020-12-08","kind":"sale","acquired":false,"shares":5388,"price":56.233,"value":302983.404,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F8","text":"This transaction was made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 QP LP on August 13, 2020, as amended on September 10, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F9","text":"This transaction was executed in multiple trades at prices ranging from $56.150 to $56.455, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":865846,"source":{"system":"sec-edgar","filing":"0001447362-20-000276","document":"wf-form4_160755268101477.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000276/wf-form4_160755268101477.xml","form_type":"4"}},{"id":2951640,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-12-09T22:24:54.000Z","date":"2020-12-08","kind":"sale","acquired":false,"shares":27176,"price":56.284,"value":1529573.984,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F4","text":"This transaction was made pursuant to a Rule 10b5-1 plan adopted by MGC Venture Partners 2013, L.P. (\"MGC 2013 LP\") on August 13, 2020, as amended on September 10, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"This transaction was executed in multiple trades at prices ranging from $56.150 to $56.900, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":871234,"source":{"system":"sec-edgar","filing":"0001447362-20-000276","document":"wf-form4_160755268101477.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000276/wf-form4_160755268101477.xml","form_type":"4"}},{"id":2951639,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-12-09T22:24:54.000Z","date":"2020-12-08","kind":"sale","acquired":false,"shares":7400,"price":55.975,"value":414215.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on September 10, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"This transaction was executed in multiple trades at prices ranging from $55.750 to $56.330, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":152178,"source":{"system":"sec-edgar","filing":"0001447362-20-000276","document":"wf-form4_160755268101477.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000276/wf-form4_160755268101477.xml","form_type":"4"}},{"id":2951638,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-12-09T22:24:54.000Z","date":"2020-12-07","kind":"sale","acquired":false,"shares":2600,"price":55.84,"value":145184.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on September 10, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $55.750 to $56.040, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":159578,"source":{"system":"sec-edgar","filing":"0001447362-20-000276","document":"wf-form4_160755268101477.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000276/wf-form4_160755268101477.xml","form_type":"4"}},{"id":3007129,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. 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The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":162878,"source":{"system":"sec-edgar","filing":"0001447362-20-000239","document":"wf-form4_160271705881736.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000239/wf-form4_160271705881736.xml","form_type":"4"}},{"id":3007127,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. 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The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":168653,"source":{"system":"sec-edgar","filing":"0001447362-20-000239","document":"wf-form4_160271705881736.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000239/wf-form4_160271705881736.xml","form_type":"4"}},{"id":3007126,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. 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The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":170753,"source":{"system":"sec-edgar","filing":"0001447362-20-000239","document":"wf-form4_160271705881736.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000239/wf-form4_160271705881736.xml","form_type":"4"}},{"id":3007125,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. 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The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":192502,"source":{"system":"sec-edgar","filing":"0001447362-20-000239","document":"wf-form4_160271705881736.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000239/wf-form4_160271705881736.xml","form_type":"4"}},{"id":3033158,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. 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The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":898410,"source":{"system":"sec-edgar","filing":"0001447362-20-000216","document":"wf-form4_159985474861590.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000216/wf-form4_159985474861590.xml","form_type":"4"}},{"id":3033157,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. 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The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":899110,"source":{"system":"sec-edgar","filing":"0001447362-20-000216","document":"wf-form4_159985474861590.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000216/wf-form4_159985474861590.xml","form_type":"4"}},{"id":3033156,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. 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The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":902202,"source":{"system":"sec-edgar","filing":"0001447362-20-000216","document":"wf-form4_159985474861590.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000216/wf-form4_159985474861590.xml","form_type":"4"}},{"id":3035483,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-09-09T20:08:54.000Z","date":"2020-09-08","kind":"sale","acquired":false,"shares":501,"price":48.397,"value":24246.897,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F10","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 LP on March 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F23","text":"This transaction was executed in multiple trades at prices ranging from $48.070 to $48.620, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":904404,"source":{"system":"sec-edgar","filing":"0001447362-20-000211","document":"wf-form4_159968211664689.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":19,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000211/wf-form4_159968211664689.xml","form_type":"4"}},{"id":3035482,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-09-09T20:08:54.000Z","date":"2020-09-08","kind":"sale","acquired":false,"shares":800,"price":47.628,"value":38102.4,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F10","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 LP on March 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F22","text":"This transaction was executed in multiple trades at prices ranging from $47.040 to $48.000, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":904905,"source":{"system":"sec-edgar","filing":"0001447362-20-000211","document":"wf-form4_159968211664689.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":18,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000211/wf-form4_159968211664689.xml","form_type":"4"}},{"id":3035481,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-09-09T20:08:54.000Z","date":"2020-09-08","kind":"sale","acquired":false,"shares":1300,"price":46.581,"value":60555.3,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F10","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 LP on March 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F21","text":"This transaction was executed in multiple trades at prices ranging from $46.020 to $46.970, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":905705,"source":{"system":"sec-edgar","filing":"0001447362-20-000211","document":"wf-form4_159968211664689.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":17,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000211/wf-form4_159968211664689.xml","form_type":"4"}},{"id":3035480,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-09-09T20:08:54.000Z","date":"2020-09-08","kind":"sale","acquired":false,"shares":600,"price":49.14,"value":29484.0,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F6","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 QP LP on March 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F20","text":"This transaction was executed in multiple trades at prices ranging from $49.110 to $49.260, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":907005,"source":{"system":"sec-edgar","filing":"0001447362-20-000211","document":"wf-form4_159968211664689.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":16,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000211/wf-form4_159968211664689.xml","form_type":"4"}},{"id":3035479,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-09-09T20:08:54.000Z","date":"2020-09-08","kind":"sale","acquired":false,"shares":3552,"price":48.68,"value":172911.36,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F6","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 QP LP on March 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F19","text":"This transaction was executed in multiple trades at prices ranging from $48.070 to $49.040, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":907605,"source":{"system":"sec-edgar","filing":"0001447362-20-000211","document":"wf-form4_159968211664689.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":15,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000211/wf-form4_159968211664689.xml","form_type":"4"}},{"id":3035478,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-09-09T20:08:54.000Z","date":"2020-09-08","kind":"sale","acquired":false,"shares":1010,"price":47.553,"value":48028.53,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F6","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 QP LP on March 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F18","text":"This transaction was executed in multiple trades at prices ranging from $47.060 to $48.020, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":911157,"source":{"system":"sec-edgar","filing":"0001447362-20-000211","document":"wf-form4_159968211664689.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":14,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000211/wf-form4_159968211664689.xml","form_type":"4"}},{"id":3035477,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-09-09T20:08:54.000Z","date":"2020-09-08","kind":"sale","acquired":false,"shares":1300,"price":46.56,"value":60528.0,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F6","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 QP LP on March 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F17","text":"This transaction was executed in multiple trades at prices ranging from $46.020 to $47.000, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":912167,"source":{"system":"sec-edgar","filing":"0001447362-20-000211","document":"wf-form4_159968211664689.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000211/wf-form4_159968211664689.xml","form_type":"4"}},{"id":3035476,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-09-09T20:08:54.000Z","date":"2020-09-08","kind":"sale","acquired":false,"shares":24621,"price":48.981,"value":1205961.201,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC Venture Partners 2013, L.P. (\"MGC 2013 LP\") on March 13, 2020, as amended on June 1, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F16","text":"This transaction was executed in multiple trades at prices ranging from $48.800 to $49.260, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":913467,"source":{"system":"sec-edgar","filing":"0001447362-20-000211","document":"wf-form4_159968211664689.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000211/wf-form4_159968211664689.xml","form_type":"4"}},{"id":3035475,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-09-09T20:08:54.000Z","date":"2020-09-08","kind":"sale","acquired":false,"shares":25967,"price":48.368,"value":1255971.856,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC Venture Partners 2013, L.P. (\"MGC 2013 LP\") on March 13, 2020, as amended on June 1, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F15","text":"This transaction was executed in multiple trades at prices ranging from $47.800 to $48.790, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":938088,"source":{"system":"sec-edgar","filing":"0001447362-20-000211","document":"wf-form4_159968211664689.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000211/wf-form4_159968211664689.xml","form_type":"4"}},{"id":3035474,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-09-09T20:08:54.000Z","date":"2020-09-08","kind":"sale","acquired":false,"shares":5624,"price":47.128,"value":265047.872,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC Venture Partners 2013, L.P. (\"MGC 2013 LP\") on March 13, 2020, as amended on June 1, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F14","text":"This transaction was executed in multiple trades at prices ranging from $46.800 to $47.770, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":964055,"source":{"system":"sec-edgar","filing":"0001447362-20-000211","document":"wf-form4_159968211664689.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000211/wf-form4_159968211664689.xml","form_type":"4"}},{"id":3035473,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-09-09T20:08:54.000Z","date":"2020-09-08","kind":"sale","acquired":false,"shares":3990,"price":46.317,"value":184804.83,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC Venture Partners 2013, L.P. (\"MGC 2013 LP\") on March 13, 2020, as amended on June 1, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"These transactions were executed in multiple trades at prices ranging from $45.800 to $46.790, inclusive. The prices reported above reflect the weighted-average sale prices. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":969679,"source":{"system":"sec-edgar","filing":"0001447362-20-000211","document":"wf-form4_159968211664689.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000211/wf-form4_159968211664689.xml","form_type":"4"}},{"id":3035472,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-09-09T20:08:54.000Z","date":"2020-09-04","kind":"sale","acquired":false,"shares":3500,"price":48.237,"value":168829.5,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F10","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 LP on March 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F13","text":"This transaction was executed in multiple trades at prices ranging from $48.000 to $48.830, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":973669,"source":{"system":"sec-edgar","filing":"0001447362-20-000211","document":"wf-form4_159968211664689.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000211/wf-form4_159968211664689.xml","form_type":"4"}},{"id":3035471,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-09-09T20:08:54.000Z","date":"2020-09-04","kind":"sale","acquired":false,"shares":3475,"price":47.356,"value":164562.1,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F10","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 LP on March 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F12","text":"This transaction was executed in multiple trades at prices ranging from $47.000 to $47.980, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":977169,"source":{"system":"sec-edgar","filing":"0001447362-20-000211","document":"wf-form4_159968211664689.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000211/wf-form4_159968211664689.xml","form_type":"4"}},{"id":3035470,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-09-09T20:08:54.000Z","date":"2020-09-04","kind":"sale","acquired":false,"shares":4260,"price":46.587,"value":198460.62,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F10","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 LP on March 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F11","text":"This transaction was executed in multiple trades at prices ranging from $46.000 to $46.990, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":980644,"source":{"system":"sec-edgar","filing":"0001447362-20-000211","document":"wf-form4_159968211664689.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000211/wf-form4_159968211664689.xml","form_type":"4"}},{"id":3035469,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-09-09T20:08:54.000Z","date":"2020-09-04","kind":"sale","acquired":false,"shares":3295,"price":48.256,"value":159003.52,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F6","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 QP LP on March 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F9","text":"This transaction was executed in multiple trades at prices ranging from $48.000 to $48.820, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":984904,"source":{"system":"sec-edgar","filing":"0001447362-20-000211","document":"wf-form4_159968211664689.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000211/wf-form4_159968211664689.xml","form_type":"4"}},{"id":3035468,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-09-09T20:08:54.000Z","date":"2020-09-04","kind":"sale","acquired":false,"shares":3894,"price":47.387,"value":184524.978,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F6","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 QP LP on March 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F8","text":"This transaction was executed in multiple trades at prices ranging from $47.000 to $47.990, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":988199,"source":{"system":"sec-edgar","filing":"0001447362-20-000211","document":"wf-form4_159968211664689.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000211/wf-form4_159968211664689.xml","form_type":"4"}},{"id":3035467,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-09-09T20:08:54.000Z","date":"2020-09-04","kind":"sale","acquired":false,"shares":4080,"price":46.579,"value":190042.32,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F6","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 QP LP on March 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"This transaction was executed in multiple trades at prices ranging from $46.000 to $46.995, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":992093,"source":{"system":"sec-edgar","filing":"0001447362-20-000211","document":"wf-form4_159968211664689.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000211/wf-form4_159968211664689.xml","form_type":"4"}},{"id":3035466,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-09-09T20:08:54.000Z","date":"2020-09-04","kind":"sale","acquired":false,"shares":19576,"price":47.067,"value":921383.592,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC Venture Partners 2013, L.P. (\"MGC 2013 LP\") on March 13, 2020, as amended on June 1, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"This transaction was executed in multiple trades at prices ranging from $46.800 to $47.510, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":996173,"source":{"system":"sec-edgar","filing":"0001447362-20-000211","document":"wf-form4_159968211664689.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000211/wf-form4_159968211664689.xml","form_type":"4"}},{"id":3035465,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-09-09T20:08:54.000Z","date":"2020-09-04","kind":"sale","acquired":false,"shares":19758,"price":46.326,"value":915309.108,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC Venture Partners 2013, L.P. (\"MGC 2013 LP\") on March 13, 2020, as amended on June 1, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"These transactions were executed in multiple trades at prices ranging from $45.800 to $46.790, inclusive. The prices reported above reflect the weighted-average sale prices. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1015749,"source":{"system":"sec-edgar","filing":"0001447362-20-000211","document":"wf-form4_159968211664689.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000211/wf-form4_159968211664689.xml","form_type":"4"}},{"id":3037744,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-09-04T20:05:48.000Z","date":"2020-09-03","kind":"sale","acquired":false,"shares":2602,"price":46.09,"value":119926.18,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F7","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 LP on March 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F11","text":"This transaction was executed in multiple trades at prices ranging from $46.00 to $46.32, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1035507,"source":{"system":"sec-edgar","filing":"0001447362-20-000203","document":"wf-form4_159924991963365.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000203/wf-form4_159924991963365.xml","form_type":"4"}},{"id":3037743,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-09-04T20:05:48.000Z","date":"2020-09-03","kind":"sale","acquired":false,"shares":2600,"price":46.1,"value":119860.0,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F5","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 QP LP on March 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F10","text":"This transaction was executed in multiple trades at prices ranging from $46.00 to $46.29, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1038109,"source":{"system":"sec-edgar","filing":"0001447362-20-000203","document":"wf-form4_159924991963365.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000203/wf-form4_159924991963365.xml","form_type":"4"}},{"id":3037742,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-09-04T20:05:48.000Z","date":"2020-09-03","kind":"sale","acquired":false,"shares":24998,"price":46,"value":1149908.0,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC Venture Partners 2013, L.P. (\"MGC 2013 LP\") on March 13, 2020, as amended on June 1, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F9","text":"This transaction was executed in multiple trades at prices ranging from $45.80 to $46.34, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1040709,"source":{"system":"sec-edgar","filing":"0001447362-20-000203","document":"wf-form4_159924991963365.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000203/wf-form4_159924991963365.xml","form_type":"4"}},{"id":3037741,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-09-04T20:05:48.000Z","date":"2020-09-02","kind":"sale","acquired":false,"shares":300,"price":46.02,"value":13806.0,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F7","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 LP on March 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F8","text":"This transaction was executed in multiple trades at prices ranging from $46.01 to $46.04, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1065707,"source":{"system":"sec-edgar","filing":"0001447362-20-000203","document":"wf-form4_159924991963365.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000203/wf-form4_159924991963365.xml","form_type":"4"}},{"id":3037740,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-09-04T20:05:48.000Z","date":"2020-09-02","kind":"sale","acquired":false,"shares":400,"price":46.02,"value":18408.0,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F5","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 QP LP on March 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"This transaction was executed in multiple trades at prices ranging from $46.00 to $46.04, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1066007,"source":{"system":"sec-edgar","filing":"0001447362-20-000203","document":"wf-form4_159924991963365.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000203/wf-form4_159924991963365.xml","form_type":"4"}},{"id":3037739,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-09-04T20:05:48.000Z","date":"2020-09-02","kind":"sale","acquired":false,"shares":6665,"price":45.99,"value":306523.35,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC Venture Partners 2013, L.P. (\"MGC 2013 LP\") on March 13, 2020, as amended on June 1, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $45.80 to $46.16, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1066407,"source":{"system":"sec-edgar","filing":"0001447362-20-000203","document":"wf-form4_159924991963365.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000203/wf-form4_159924991963365.xml","form_type":"4"}},{"id":3041062,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-09-02T21:45:11.000Z","date":"2020-09-01","kind":"sale","acquired":false,"shares":2147,"price":46.03,"value":98826.41,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F8","text":"This transaction was made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 LP on March 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F9","text":"This transaction was executed in multiple trades at prices ranging from $46.00 to $46.14, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1073072,"source":{"system":"sec-edgar","filing":"0001447362-20-000199","document":"wf-form4_159908308910869.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000199/wf-form4_159908308910869.xml","form_type":"4"}},{"id":3041061,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-09-02T21:45:11.000Z","date":"2020-09-01","kind":"sale","acquired":false,"shares":2200,"price":46.02,"value":101244.0,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F6","text":"This transaction was made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 QP LP on March 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"This transaction was executed in multiple trades at prices ranging from $46.00 to $46.13, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1075219,"source":{"system":"sec-edgar","filing":"0001447362-20-000199","document":"wf-form4_159908308910869.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000199/wf-form4_159908308910869.xml","form_type":"4"}},{"id":3041060,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-09-02T21:45:11.000Z","date":"2020-09-01","kind":"sale","acquired":false,"shares":35963,"price":45.95,"value":1652499.85,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC Venture Partners 2013, L.P. (\"MGC 2013 LP\") on March 13, 2020, as amended on June 1, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"This transaction was executed in multiple trades at prices ranging from $45.80 to $46.29, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1077419,"source":{"system":"sec-edgar","filing":"0001447362-20-000199","document":"wf-form4_159908308910869.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000199/wf-form4_159908308910869.xml","form_type":"4"}},{"id":3041059,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-09-02T21:45:11.000Z","date":"2020-08-31","kind":"sale","acquired":false,"shares":8228,"price":45.84,"value":377171.52,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC Venture Partners 2013, L.P. (\"MGC 2013 LP\") on March 13, 2020, as amended on June 1, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $45.80 to $45.96, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1113382,"source":{"system":"sec-edgar","filing":"0001447362-20-000199","document":"wf-form4_159908308910869.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000199/wf-form4_159908308910869.xml","form_type":"4"}},{"id":3043675,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-08-31T20:05:18.000Z","date":"2020-08-28","kind":"sale","acquired":false,"shares":3609,"price":46.15,"value":166555.35,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F8","text":"This transaction was made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 LP on March 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F9","text":"This transaction was executed in multiple trades at prices ranging from $46.00 to $46.46, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1121610,"source":{"system":"sec-edgar","filing":"0001447362-20-000195","document":"wf-form4_159890429738649.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000195/wf-form4_159890429738649.xml","form_type":"4"}},{"id":3043674,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-08-31T20:05:18.000Z","date":"2020-08-28","kind":"sale","acquired":false,"shares":3605,"price":46.16,"value":166406.8,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F6","text":"This transaction was made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 QP LP on March 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"This transaction was executed in multiple trades at prices ranging from $46.00 to $46.47, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1125219,"source":{"system":"sec-edgar","filing":"0001447362-20-000195","document":"wf-form4_159890429738649.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000195/wf-form4_159890429738649.xml","form_type":"4"}},{"id":3043673,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-08-31T20:05:18.000Z","date":"2020-08-28","kind":"sale","acquired":false,"shares":48487,"price":46.06,"value":2233311.22,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC Venture Partners 2013, L.P. (\"MGC 2013 LP\") on March 13, 2020, as amended on June 1, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"This transaction was executed in multiple trades at prices ranging from $45.80 to $46.47, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1128824,"source":{"system":"sec-edgar","filing":"0001447362-20-000195","document":"wf-form4_159890429738649.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000195/wf-form4_159890429738649.xml","form_type":"4"}},{"id":3043672,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-08-31T20:05:18.000Z","date":"2020-08-27","kind":"sale","acquired":false,"shares":16239,"price":45.89,"value":745207.71,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC Venture Partners 2013, L.P. (\"MGC 2013 LP\") on March 13, 2020, as amended on June 1, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $45.80 to $46.01, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1177311,"source":{"system":"sec-edgar","filing":"0001447362-20-000195","document":"wf-form4_159890429738649.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000195/wf-form4_159890429738649.xml","form_type":"4"}},{"id":3045493,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-08-27T20:04:51.000Z","date":"2020-08-26","kind":"sale","acquired":false,"shares":100,"price":46,"value":4600.0,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F7","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 LP on March 13, 2020."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1193550,"source":{"system":"sec-edgar","filing":"0001447362-20-000193","document":"wf-form4_159855867654281.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000193/wf-form4_159855867654281.xml","form_type":"4"}},{"id":3045492,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. 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MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1193650,"source":{"system":"sec-edgar","filing":"0001447362-20-000193","document":"wf-form4_159855867654281.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000193/wf-form4_159855867654281.xml","form_type":"4"}},{"id":3045491,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-08-27T20:04:51.000Z","date":"2020-08-26","kind":"sale","acquired":false,"shares":4879,"price":45.848,"value":223692.392,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC Venture Partners 2013, L.P. (\"MGC 2013 LP\") on March 13, 2020, as amended on June 1, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F8","text":"This transaction was executed in multiple trades at prices ranging from $45.800 to $46.100, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1193720,"source":{"system":"sec-edgar","filing":"0001447362-20-000193","document":"wf-form4_159855867654281.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000193/wf-form4_159855867654281.xml","form_type":"4"}},{"id":3045490,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-08-27T20:04:51.000Z","date":"2020-08-25","kind":"sale","acquired":false,"shares":200,"price":46.045,"value":9209.0,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F7","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 LP on March 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"This transaction was executed in multiple trades at prices ranging from $46.000 to $46.090, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1198599,"source":{"system":"sec-edgar","filing":"0001447362-20-000193","document":"wf-form4_159855867654281.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000193/wf-form4_159855867654281.xml","form_type":"4"}},{"id":3045489,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-08-27T20:04:51.000Z","date":"2020-08-25","kind":"sale","acquired":false,"shares":200,"price":46.045,"value":9209.0,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F5","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 QP LP on March 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"This transaction was executed in multiple trades at prices ranging from $46.000 to $46.090, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1198799,"source":{"system":"sec-edgar","filing":"0001447362-20-000193","document":"wf-form4_159855867654281.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000193/wf-form4_159855867654281.xml","form_type":"4"}},{"id":3045488,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-08-27T20:04:51.000Z","date":"2020-08-25","kind":"sale","acquired":false,"shares":17148,"price":45.895,"value":787007.46,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC Venture Partners 2013, L.P. (\"MGC 2013 LP\") on March 13, 2020, as amended on June 1, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $45.800 to $46.125, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1198999,"source":{"system":"sec-edgar","filing":"0001447362-20-000193","document":"wf-form4_159855867654281.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000193/wf-form4_159855867654281.xml","form_type":"4"}},{"id":3047592,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-08-25T20:11:40.000Z","date":"2020-08-24","kind":"sale","acquired":false,"shares":8877,"price":45.9,"value":407454.3,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC Venture Partners 2013, L.P. (\"MGC 2013 LP\") on March 13, 2020, as amended on June 1, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"This transaction was executed in multiple trades at prices ranging from $45.80 to $46.01, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1216147,"source":{"system":"sec-edgar","filing":"0001447362-20-000191","document":"wf-form4_159838628445835.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000191/wf-form4_159838628445835.xml","form_type":"4"}},{"id":3047591,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-08-25T20:11:40.000Z","date":"2020-08-21","kind":"sale","acquired":false,"shares":6017,"price":45.85,"value":275879.45,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC Venture Partners 2013, L.P. (\"MGC 2013 LP\") on March 13, 2020, as amended on June 1, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $45.80 to $45.95, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1225024,"source":{"system":"sec-edgar","filing":"0001447362-20-000191","document":"wf-form4_159838628445835.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000191/wf-form4_159838628445835.xml","form_type":"4"}},{"id":3049837,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-08-21T20:06:38.000Z","date":"2020-08-20","kind":"sale","acquired":false,"shares":300,"price":46.06,"value":13818.0,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F7","text":"This transaction was made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 LP on March 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F8","text":"This transaction was executed in multiple trades at prices ranging from $46.03 to $46.08, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1231041,"source":{"system":"sec-edgar","filing":"0001447362-20-000188","document":"wf-form4_159804038445523.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000188/wf-form4_159804038445523.xml","form_type":"4"}},{"id":3049836,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-08-21T20:06:38.000Z","date":"2020-08-20","kind":"sale","acquired":false,"shares":100,"price":46.03,"value":4603.0,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F6","text":"This transaction was made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 QP LP on March 13, 2020."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1231341,"source":{"system":"sec-edgar","filing":"0001447362-20-000188","document":"wf-form4_159804038445523.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000188/wf-form4_159804038445523.xml","form_type":"4"}},{"id":3049835,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-08-21T20:06:38.000Z","date":"2020-08-20","kind":"sale","acquired":false,"shares":8395,"price":45.84,"value":384826.8,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC Venture Partners 2013, L.P. (\"MGC 2013 LP\") on March 13, 2020, as amended on June 1, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"This transaction was executed in multiple trades at prices ranging from $45.80 to $46.03, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1231441,"source":{"system":"sec-edgar","filing":"0001447362-20-000188","document":"wf-form4_159804038445523.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000188/wf-form4_159804038445523.xml","form_type":"4"}},{"id":3049834,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-08-21T20:06:38.000Z","date":"2020-08-19","kind":"sale","acquired":false,"shares":8574,"price":45.83,"value":392946.42,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC Venture Partners 2013, L.P. (\"MGC 2013 LP\") on March 13, 2020, as amended on June 1, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $45.80 to $45.90, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1239836,"source":{"system":"sec-edgar","filing":"0001447362-20-000188","document":"wf-form4_159804038445523.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000188/wf-form4_159804038445523.xml","form_type":"4"}},{"id":3084283,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-07-13T20:05:35.000Z","date":"2020-07-09","kind":"sale","acquired":false,"shares":3107,"price":43.08,"value":133849.56,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F8","text":"This transaction was made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 LP on March 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"This transaction was executed in multiple trades at prices ranging from $43.00 to $43.47, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1248410,"source":{"system":"sec-edgar","filing":"0001447362-20-000146","document":"wf-form4_159467072068838.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000146/wf-form4_159467072068838.xml","form_type":"4"}},{"id":3084282,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. 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The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1251517,"source":{"system":"sec-edgar","filing":"0001447362-20-000146","document":"wf-form4_159467072068838.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000146/wf-form4_159467072068838.xml","form_type":"4"}},{"id":3084281,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. 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The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1256773,"source":{"system":"sec-edgar","filing":"0001447362-20-000146","document":"wf-form4_159467072068838.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000146/wf-form4_159467072068838.xml","form_type":"4"}},{"id":3084280,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-07-13T20:05:35.000Z","date":"2020-07-09","kind":"sale","acquired":false,"shares":30725,"price":43.3,"value":1330392.5,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC Venture Partners 2013, L.P. (\"MGC 2013 LP\") on March 13, 2020, as amended on June 1, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $42.80 to $43.79, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1280675,"source":{"system":"sec-edgar","filing":"0001447362-20-000146","document":"wf-form4_159467072068838.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000146/wf-form4_159467072068838.xml","form_type":"4"}},{"id":3098434,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-06-26T20:13:01.000Z","date":"2020-06-24","kind":"sale","acquired":false,"shares":100,"price":43.11,"value":4311.0,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was made pursuant to a Rule 10b5-1 plan adopted by MGC Venture Partners 2013, L.P. (\"MGC 2013 LP\") on March 13, 2020."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1311400,"source":{"system":"sec-edgar","filing":"0001447362-20-000139","document":"wf-form4_159320236453271.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000139/wf-form4_159320236453271.xml","form_type":"4"}},{"id":3101850,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-06-24T00:18:57.000Z","date":"2020-06-23","kind":"sale","acquired":false,"shares":4048,"price":43.07,"value":174347.36,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F10","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 LP on March 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F14","text":"This transaction was executed in multiple trades at prices ranging from $43.00 to $43.62, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1311500,"source":{"system":"sec-edgar","filing":"0001447362-20-000136","document":"wf-form4_159295791963527.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000136/wf-form4_159295791963527.xml","form_type":"4"}},{"id":3101849,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-06-24T00:18:57.000Z","date":"2020-06-23","kind":"sale","acquired":false,"shares":3959,"price":43.07,"value":170514.13,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F7","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 QP LP on March 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F13","text":"This transaction was executed in multiple trades at prices ranging from $43.00 to $43.33, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1315548,"source":{"system":"sec-edgar","filing":"0001447362-20-000136","document":"wf-form4_159295791963527.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000136/wf-form4_159295791963527.xml","form_type":"4"}},{"id":3101848,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-06-24T00:18:57.000Z","date":"2020-06-23","kind":"sale","acquired":false,"shares":17329,"price":43.08,"value":746533.32,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC Venture Partners 2013, L.P. (\"MGC 2013 LP\") on March 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F12","text":"This transaction was executed in multiple trades at prices ranging from $43.00 to $43.38, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1319507,"source":{"system":"sec-edgar","filing":"0001447362-20-000136","document":"wf-form4_159295791963527.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000136/wf-form4_159295791963527.xml","form_type":"4"}},{"id":3101847,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-06-24T00:18:57.000Z","date":"2020-06-19","kind":"sale","acquired":false,"shares":300,"price":44.05,"value":13215.0,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F10","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 LP on March 13, 2020."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1336836,"source":{"system":"sec-edgar","filing":"0001447362-20-000136","document":"wf-form4_159295791963527.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000136/wf-form4_159295791963527.xml","form_type":"4"}},{"id":3101846,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-06-24T00:18:57.000Z","date":"2020-06-19","kind":"sale","acquired":false,"shares":2766,"price":43.53,"value":120403.98,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F10","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 LP on March 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F11","text":"This transaction was executed in multiple trades at prices ranging from $43.00 to $43.98, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1337136,"source":{"system":"sec-edgar","filing":"0001447362-20-000136","document":"wf-form4_159295791963527.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000136/wf-form4_159295791963527.xml","form_type":"4"}},{"id":3101845,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-06-24T00:18:57.000Z","date":"2020-06-19","kind":"sale","acquired":false,"shares":300,"price":44.15,"value":13245.0,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F7","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 QP LP on March 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F9","text":"This transaction was executed in multiple trades at prices ranging from $44.05 to $44.34, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1339902,"source":{"system":"sec-edgar","filing":"0001447362-20-000136","document":"wf-form4_159295791963527.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000136/wf-form4_159295791963527.xml","form_type":"4"}},{"id":3101844,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-06-24T00:18:57.000Z","date":"2020-06-19","kind":"sale","acquired":false,"shares":2700,"price":43.52,"value":117504.0,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F7","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC 2018 QP LP on March 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F8","text":"This transaction was executed in multiple trades at prices ranging from $43.00 to $43.93, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1340202,"source":{"system":"sec-edgar","filing":"0001447362-20-000136","document":"wf-form4_159295791963527.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000136/wf-form4_159295791963527.xml","form_type":"4"}},{"id":3101843,"issuer":{"id":359,"kind":"organization","name":"CASTLE BIOSCIENCES INC","symbol":"CSTL"},"owners":[{"id":141017,"kind":"person","name":"Cook Joseph C. III","position":1,"cik":"0001783205","reported_name":"Cook Joseph C. III","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-06-24T00:18:57.000Z","date":"2020-06-19","kind":"sale","acquired":false,"shares":8016,"price":43.91,"value":351982.56,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These transactions were made pursuant to a Rule 10b5-1 plan adopted by MGC Venture Partners 2013, L.P. (\"MGC 2013 LP\") on March 13, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"This transaction was executed in multiple trades at prices ranging from $43.75 to $44.41, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Held by MGC 2013 LP, MGC Venture Partners 2018, L.P. (\"MGC 2018 LP\"), MGC Venture Partners QP 2018, L.P. (\"MGC 2018 QP LP\") and MGC Venture Partners 2013 GP, LLC (\"MGC 2013 GP\"). MGC 2013 GP is the general partner of MGC 2013 LP. MGC Venture Partners 2018 GP, LLC (\"MGC 2018 GP\") is the general partner of MGC 2018 LP and MGC 2018 QP LP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The Reporting Person is a managing director of MGC 2013 GP and a managing partner of MGC 2018 GP, and shares voting and investment power over the shares held by MGC 2013 LP, MGC 2018 LP, MGC 2018 QP LP and MGC 2013 GP. The Reporting Person disclaims beneficial ownership of the shares held by MGC 2013 GP, MGC 2018 GP, MGC 2013 LP, MGC 2018 LP and MGC 2018 QP LP as reported herein, except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purposes."}],"balance_after":1342902,"source":{"system":"sec-edgar","filing":"0001447362-20-000136","document":"wf-form4_159295791963527.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736220000136/wf-form4_159295791963527.xml","form_type":"4"}}],"next_cursor":"2020-06-24T00:18:57.000000Z,3101843"}