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The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2), (4), (5) and (6) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The shares are held by The Per Artur Bergman Revocable Trust, of which the reporting person is settlor, sole trustee, and sole beneficiary."}],"balance_after":1098317,"source":{"system":"sec-edgar","filing":"0001517413-26-000304","document":"wk-form4_1792011219.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1769490/000151741326000304/wk-form4_1792011219.xml","form_type":"4"}},{"id":4635228,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-09-30T21:23:53.000Z","date":"2026-09-29","kind":"sale","planned":true,"acquired":false,"shares":3961,"price":25.26,"value":100054.86,"ownership":{"direct":false,"nature":"See Footnote."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 4, 2026."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. 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The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (2) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The shares are held by The Per Artur Bergman Revocable Trust, of which the reporting person is settlor, sole trustee, and sole beneficiary."}],"balance_after":1595006,"source":{"system":"sec-edgar","filing":"0001517413-26-000292","document":"wk-form4_1790023508.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1769490/000151741326000292/wk-form4_1790023508.xml","form_type":"4"}},{"id":4619720,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-09-16T20:59:11.000Z","date":"2026-09-15","kind":"sale","planned":true,"acquired":false,"shares":2500,"price":25.14,"value":62850.0,"ownership":{"direct":false,"nature":"See Footnote."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 4, 2026."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.00 to $25.39, inclusive."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The shares are held by The Per Artur Bergman Revocable Trust, of which the reporting person is settlor, sole trustee, and sole beneficiary."}],"balance_after":1597206,"source":{"system":"sec-edgar","filing":"0001517413-26-000284","document":"wk-form4_1789592348.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1769490/000151741326000284/wk-form4_1789592348.xml","form_type":"4"}},{"id":4619719,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-09-16T20:59:11.000Z","date":"2026-09-14","kind":"sale","planned":true,"acquired":false,"shares":4500,"price":25.02,"value":112590.0,"ownership":{"direct":false,"nature":"See Footnote."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 4, 2026."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $24.95 to $25.09, inclusive."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The shares are held by The Per Artur Bergman Revocable Trust, of which the reporting person is settlor, sole trustee, and sole beneficiary."}],"balance_after":1599706,"source":{"system":"sec-edgar","filing":"0001517413-26-000284","document":"wk-form4_1789592348.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1769490/000151741326000284/wk-form4_1789592348.xml","form_type":"4"}},{"id":4619718,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-09-16T20:59:11.000Z","date":"2026-09-14","kind":"sale","planned":true,"acquired":false,"shares":23879,"price":24.54,"value":585990.66,"ownership":{"direct":false,"nature":"See Footnote."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 4, 2026."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.95 to $24.94, inclusive."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The shares are held by The Per Artur Bergman Revocable Trust, of which the reporting person is settlor, sole trustee, and sole beneficiary."}],"balance_after":1604206,"source":{"system":"sec-edgar","filing":"0001517413-26-000284","document":"wk-form4_1789592348.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1769490/000151741326000284/wk-form4_1789592348.xml","form_type":"4"}},{"id":4619717,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-09-16T20:59:11.000Z","date":"2026-09-14","kind":"sale","planned":true,"acquired":false,"shares":2700,"price":23.6,"value":63720.0,"ownership":{"direct":false,"nature":"See Footnote."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 4, 2026."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $22.95 to $23.93, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2), (4), (5) and (6) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The shares are held by The Per Artur Bergman Revocable Trust, of which the reporting person is settlor, sole trustee, and sole beneficiary."}],"balance_after":1628085,"source":{"system":"sec-edgar","filing":"0001517413-26-000284","document":"wk-form4_1789592348.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1769490/000151741326000284/wk-form4_1789592348.xml","form_type":"4"}},{"id":4616089,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-09-11T21:04:45.000Z","date":"2026-09-09","kind":"sale","planned":true,"acquired":false,"shares":400,"price":24.11,"value":9644.0,"ownership":{"direct":false,"nature":"See Footnote."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 4, 2026."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.89 to $24.34, inclusive."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The shares are held by The Per Artur Bergman Revocable Trust, of which the reporting person is settlor, sole trustee, and sole beneficiary."}],"balance_after":1630785,"source":{"system":"sec-edgar","filing":"0001517413-26-000278","document":"wk-form4_1789160682.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1769490/000151741326000278/wk-form4_1789160682.xml","form_type":"4"}},{"id":4616088,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-09-11T21:04:45.000Z","date":"2026-09-09","kind":"sale","planned":true,"acquired":false,"shares":8560,"price":22.66,"value":193969.6,"ownership":{"direct":false,"nature":"See Footnote."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 4, 2026."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $22.50 to $23.09, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (2) and (4) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The shares are held by The Per Artur Bergman Revocable Trust, of which the reporting person is settlor, sole trustee, and sole beneficiary."}],"balance_after":1631185,"source":{"system":"sec-edgar","filing":"0001517413-26-000278","document":"wk-form4_1789160682.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1769490/000151741326000278/wk-form4_1789160682.xml","form_type":"4"}},{"id":4614852,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-09-10T20:51:09.000Z","date":"2026-09-08","kind":"sale","planned":true,"acquired":false,"shares":300,"price":22.51,"value":6753.0,"ownership":{"direct":false,"nature":"See Footnote."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 4, 2026."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $22.50 to $22.51, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (2) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The shares are held by The Per Artur Bergman Revocable Trust, of which the reporting person is settlor, sole trustee, and sole beneficiary."}],"balance_after":1639745,"source":{"system":"sec-edgar","filing":"0001517413-26-000273","document":"wk-form4_1789073466.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1769490/000151741326000273/wk-form4_1789073466.xml","form_type":"4"}},{"id":3534850,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-09-08T20:50:34.000Z","date":"2026-09-03","kind":"sale","planned":true,"acquired":false,"shares":10777,"price":21.08,"value":227179.16,"ownership":{"direct":false,"nature":"See Footnote."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 4, 2026."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $21.00 to $21.21, inclusive."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The shares are held by The Per Artur Bergman Revocable Trust, of which the reporting person is settlor, sole trustee, and sole beneficiary."}],"balance_after":1640045,"source":{"system":"sec-edgar","filing":"0001517413-26-000270","document":"wk-form4_1788900631.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1769490/000151741326000270/wk-form4_1788900631.xml","form_type":"4"}},{"id":3534849,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-09-08T20:50:34.000Z","date":"2026-09-03","kind":"sale","planned":true,"acquired":false,"shares":7742,"price":20.66,"value":159949.72,"ownership":{"direct":false,"nature":"See Footnote."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 4, 2026."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.00 to $20.995, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (3) and (5) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The shares are held by The Per Artur Bergman Revocable Trust, of which the reporting person is settlor, sole trustee, and sole beneficiary."}],"balance_after":1650822,"source":{"system":"sec-edgar","filing":"0001517413-26-000270","document":"wk-form4_1788900631.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1769490/000151741326000270/wk-form4_1788900631.xml","form_type":"4"}},{"id":3534848,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-09-08T20:50:34.000Z","date":"2026-09-03","kind":"sale","planned":true,"acquired":false,"shares":17576,"price":20.66,"value":363120.16,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 4, 2026."},{"field":"shares","element":"transactionShares","label":"F2","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed 17,576 shares of common stock of the Issuer in a transaction that resulted in a change in\nthe form of beneficial ownership from direct to indirect."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.00 to $20.995, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (3) and (5) to this Form 4."}],"balance_after":1896249,"source":{"system":"sec-edgar","filing":"0001517413-26-000270","document":"wk-form4_1788900631.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1769490/000151741326000270/wk-form4_1788900631.xml","form_type":"4"}},{"id":937,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-09-02T21:03:25.000Z","date":"2026-08-31","kind":"sale","planned":false,"acquired":false,"shares":6225,"price":23,"value":143175.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Shares sold to satisfy tax obligations in connection with the vesting of previously granted Restricted Stock Units."}],"balance_after":1913825,"source":{"system":"sec-edgar","filing":"0001517413-26-000266","document":"wk-form4_1788383003.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1769490/000151741326000266/wk-form4_1788383003.xml","form_type":"4"}},{"id":671859,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-08-31T21:00:08.000Z","date":"2026-08-27","kind":"sale","planned":false,"acquired":false,"shares":851,"price":24.08,"value":20492.08,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Shares sold to satisfy tax obligations in connection with the vesting of previously granted Restricted Stock Units."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Amounts reflect the shift from direct to indirect ownership of 52,603 shares contributed by Mr. Bergman to the Per Artur Bergman Revocable Trust on August 28, 2026."}],"balance_after":1920050,"source":{"system":"sec-edgar","filing":"0001517413-26-000258","document":"wk-form4_1788210006.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000258/wk-form4_1788210006.xml","form_type":"4"}},{"id":679745,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-08-20T21:01:01.000Z","date":"2026-08-19","kind":"sale","planned":true,"acquired":false,"shares":4164,"price":25.78,"value":107347.92,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F4","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F5","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed 31,687 shares of common stock of the Issuer in a transaction that resulted in a change in the form of beneficial ownership from direct to indirect."},{"field":"price","element":"transactionPricePerShare","label":"F8","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.58 to $26.56, inclusive."}],"balance_after":1973504,"source":{"system":"sec-edgar","filing":"0001517413-26-000240","document":"wk-form4_1787259658.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000240/wk-form4_1787259658.xml","form_type":"4"}},{"id":679744,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-08-20T21:01:01.000Z","date":"2026-08-19","kind":"sale","planned":true,"acquired":false,"shares":16435,"price":24.98,"value":410546.3,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F4","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F5","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed 31,687 shares of common stock of the Issuer in a transaction that resulted in a change in the form of beneficial ownership from direct to indirect."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $24.57 to $25.56, inclusive."}],"balance_after":1977668,"source":{"system":"sec-edgar","filing":"0001517413-26-000240","document":"wk-form4_1787259658.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000240/wk-form4_1787259658.xml","form_type":"4"}},{"id":679743,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-08-20T21:01:01.000Z","date":"2026-08-19","kind":"sale","planned":true,"acquired":false,"shares":11088,"price":23.94,"value":265446.72,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F4","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F5","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed 31,687 shares of common stock of the Issuer in a transaction that resulted in a change in the form of beneficial ownership from direct to indirect."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.57 to $24.56, inclusive."}],"balance_after":1994103,"source":{"system":"sec-edgar","filing":"0001517413-26-000240","document":"wk-form4_1787259658.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000240/wk-form4_1787259658.xml","form_type":"4"}},{"id":679742,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-08-20T21:01:01.000Z","date":"2026-08-18","kind":"sale","planned":true,"acquired":false,"shares":32387,"price":28.6,"value":926268.2,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Shares sold to satisfy tax obligations in connection with the vesting of previously granted Restricted Stock Units."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $28.60 to $29.13, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2), (6), (7) and (8) to this Form 4."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Amounts reflect the shift from direct to indirect ownership of 1,060 shares contributed by Mr. Bergman to the Per Artur Bergman Revocable Trust on March 2, 2026."}],"balance_after":2005191,"source":{"system":"sec-edgar","filing":"0001517413-26-000240","document":"wk-form4_1787259658.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000240/wk-form4_1787259658.xml","form_type":"4"}},{"id":747554,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-06-05T20:59:44.000Z","date":"2026-06-03","kind":"sale","planned":true,"acquired":false,"shares":100,"price":21.83,"value":2183.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F2","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed 7,889 shares of common stock of the Issuer in a transaction that resulted in a change in\nthe form of beneficial ownership from direct to indirect."}],"balance_after":2038638,"source":{"system":"sec-edgar","filing":"0001517413-26-000182","document":"wk-form4_1780693181.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000182/wk-form4_1780693181.xml","form_type":"4"}},{"id":747553,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-06-05T20:59:44.000Z","date":"2026-06-03","kind":"sale","planned":true,"acquired":false,"shares":6689,"price":21.13,"value":141338.57,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F2","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed 7,889 shares of common stock of the Issuer in a transaction that resulted in a change in\nthe form of beneficial ownership from direct to indirect."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.83 to $21.56, inclusive."}],"balance_after":2038738,"source":{"system":"sec-edgar","filing":"0001517413-26-000182","document":"wk-form4_1780693181.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000182/wk-form4_1780693181.xml","form_type":"4"}},{"id":747552,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-06-05T20:59:44.000Z","date":"2026-06-03","kind":"sale","planned":true,"acquired":false,"shares":1100,"price":19.84,"value":21824.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F2","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed 7,889 shares of common stock of the Issuer in a transaction that resulted in a change in\nthe form of beneficial ownership from direct to indirect."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $19.49 to $20.16, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (3) and (4) to this Form 4."}],"balance_after":2045427,"source":{"system":"sec-edgar","filing":"0001517413-26-000182","document":"wk-form4_1780693181.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000182/wk-form4_1780693181.xml","form_type":"4"}},{"id":754197,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-06-02T20:41:26.000Z","date":"2026-05-29","kind":"sale","planned":false,"acquired":false,"shares":6225,"price":16.96,"value":105576.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Shares sold to satisfy tax obligations in connection with the vesting of previously granted Restricted Stock Units."}],"balance_after":2046527,"source":{"system":"sec-edgar","filing":"0001517413-26-000168","document":"wk-form4_1780432882.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000168/wk-form4_1780432882.xml","form_type":"4"}},{"id":758494,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-05-29T21:11:47.000Z","date":"2026-05-28","kind":"sale","planned":true,"acquired":false,"shares":1077,"price":17.02,"value":18330.54,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F4","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed 1,077 shares of common stock of the Issuer in a transaction that resulted in a change in\nthe form of beneficial ownership from direct to indirect."}],"balance_after":2052752,"source":{"system":"sec-edgar","filing":"0001517413-26-000160","document":"wk-form4_1780089104.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000160/wk-form4_1780089104.xml","form_type":"4"}},{"id":758493,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-05-29T21:11:47.000Z","date":"2026-05-27","kind":"sale","planned":true,"acquired":false,"shares":852,"price":17.5,"value":14910.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Shares sold to satisfy tax obligations in connection with the vesting of previously granted Restricted Stock Units."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $17.29 to $17.50, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (2) to this Form 4."}],"balance_after":2053829,"source":{"system":"sec-edgar","filing":"0001517413-26-000160","document":"wk-form4_1780089104.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000160/wk-form4_1780089104.xml","form_type":"4"}},{"id":769658,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-05-20T22:00:12.000Z","date":"2026-05-19","kind":"sale","planned":true,"acquired":false,"shares":31848,"price":16.41,"value":522625.68,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F4","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed 31,848 shares of common stock of the Issuer in a transaction that resulted in a change in the form of beneficial ownership from direct to indirect."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.20 to $16.86, inclusive."}],"balance_after":2054681,"source":{"system":"sec-edgar","filing":"0001517413-26-000147","document":"wk-form4_1779314409.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000147/wk-form4_1779314409.xml","form_type":"4"}},{"id":769657,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-05-20T22:00:12.000Z","date":"2026-05-18","kind":"sale","planned":true,"acquired":false,"shares":32181,"price":16.85,"value":542249.85,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Shares sold to satisfy tax obligations in connection with the vesting of previously granted Restricted Stock Units."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.67 to $16.85, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) and (5) to this Form 4."}],"balance_after":2086529,"source":{"system":"sec-edgar","filing":"0001517413-26-000147","document":"wk-form4_1779314409.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000147/wk-form4_1779314409.xml","form_type":"4"}},{"id":848299,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-03-11T20:34:42.000Z","date":"2026-03-10","kind":"sale","planned":true,"acquired":false,"shares":265000,"price":22.79,"value":6039350.0,"ownership":{"direct":false,"nature":"See Foonote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on  June 3, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $22.50 to $23.12, inclusive."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The shares are held by The Per Artur Bergman Revocable Trust, of which the reporting person is settlor, sole trustee, and sole beneficiary."}],"balance_after":1604901,"source":{"system":"sec-edgar","filing":"0001517413-26-000107","document":"wk-form4_1773261278.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000107/wk-form4_1773261278.xml","form_type":"4"}},{"id":848298,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-03-11T20:34:42.000Z","date":"2026-03-09","kind":"sale","planned":true,"acquired":false,"shares":7490,"price":21.73,"value":162757.7,"ownership":{"direct":false,"nature":"See Foonote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on  June 3, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $21.53 to $21.83, inclusive."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The shares are held by The Per Artur Bergman Revocable Trust, of which the reporting person is settlor, sole trustee, and sole beneficiary."}],"balance_after":1869901,"source":{"system":"sec-edgar","filing":"0001517413-26-000107","document":"wk-form4_1773261278.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000107/wk-form4_1773261278.xml","form_type":"4"}},{"id":848297,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-03-11T20:34:42.000Z","date":"2026-03-09","kind":"sale","planned":true,"acquired":false,"shares":25554,"price":21.13,"value":539956.02,"ownership":{"direct":false,"nature":"See Foonote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on  June 3, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.53 to $21.52, inclusive."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The shares are held by The Per Artur Bergman Revocable Trust, of which the reporting person is settlor, sole trustee, and sole beneficiary."}],"balance_after":1877391,"source":{"system":"sec-edgar","filing":"0001517413-26-000107","document":"wk-form4_1773261278.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000107/wk-form4_1773261278.xml","form_type":"4"}},{"id":848296,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-03-11T20:34:42.000Z","date":"2026-03-09","kind":"sale","planned":true,"acquired":false,"shares":6956,"price":20.16,"value":140232.96,"ownership":{"direct":false,"nature":"See Foonote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on  June 3, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $19.53 to $20.47, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2), (4), (5) and (6) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The shares are held by The Per Artur Bergman Revocable Trust, of which the reporting person is settlor, sole trustee, and sole beneficiary."}],"balance_after":1902945,"source":{"system":"sec-edgar","filing":"0001517413-26-000107","document":"wk-form4_1773261278.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000107/wk-form4_1773261278.xml","form_type":"4"}},{"id":853198,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-03-09T22:17:28.000Z","date":"2026-03-05","kind":"sale","planned":true,"acquired":false,"shares":6598,"price":21.23,"value":140075.54,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on  June 3, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. 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The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) and (3) to this Form 4."}],"balance_after":2125308,"source":{"system":"sec-edgar","filing":"0001517413-26-000100","document":"wk-form4_1773094646.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000100/wk-form4_1773094646.xml","form_type":"4"}},{"id":857985,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-03-05T21:56:44.000Z","date":"2026-03-04","kind":"sale","planned":false,"acquired":false,"shares":24532,"price":21.06,"value":516643.92,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F6","text":"Shares sold to satisfy tax obligations in connection with the vesting of previously granted Restricted Stock Units."}],"balance_after":2149789,"source":{"system":"sec-edgar","filing":"0001517413-26-000096","document":"wk-form4_1772747801.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000096/wk-form4_1772747801.xml","form_type":"4"}},{"id":857984,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-03-05T21:56:44.000Z","date":"2026-03-04","kind":"grant","planned":false,"acquired":true,"shares":157438,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F5","text":"The shares are represented by restricted stock units (RSUs). Each RSU represents a contingent right to receive one share of the Issuer's Class A Common Stock upon settlement. 100% of the RSUs are initially subject to vesting. One-twelfth (8.33%) of the total RSUs will vest on May 15, 2026 and the remainder will vest in 11 equal quarterly installments (August, November, February and May) of one-twelfth thereafter (8.33% of the total RSUs will vest per quarter), in each case subject to the Reporting Person's continued service with the Issuer through each applicable vesting date."}],"balance_after":2174321,"source":{"system":"sec-edgar","filing":"0001517413-26-000096","document":"wk-form4_1772747801.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000096/wk-form4_1772747801.xml","form_type":"4"}},{"id":857983,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-03-05T21:56:44.000Z","date":"2026-03-03","kind":"gift","planned":false,"acquired":false,"shares":204327,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"On March 3, 2026, 204,327 shares held by The Per Artur Bergman Grantor Retained Annuity Trust No. 4, of which the reporting person is trustee, were transferred to The Per Artur Bergman\nGrantor Retained Annuity Trust No. 5."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The shares are held by The Per Artur Bergman Grantor Retained Annuity Trust No. 4, of which the reporting person is trustee."}],"balance_after":588671,"source":{"system":"sec-edgar","filing":"0001517413-26-000096","document":"wk-form4_1772747801.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000096/wk-form4_1772747801.xml","form_type":"4"}},{"id":857982,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-03-05T21:56:44.000Z","date":"2026-03-03","kind":"gift","planned":false,"acquired":false,"shares":50481,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On March 3, 2026, all 50,481 remaining shares held by The Per Artur Bergman Grantor Retained Annuity Trust No. 3, of which the reporting person is trustee, were transferred to The Per Artur Bergman Grantor Retained Annuity Trust No. 5."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"On March 3, 2026, all 50,481 remaining shares held by The Per Artur Bergman Grantor Retained Annuity Trust No. 3, of which the reporting person is trustee, were transferred to The Per Artur Bergman Grantor Retained Annuity Trust No. 5."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001517413-26-000096","document":"wk-form4_1772747801.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000096/wk-form4_1772747801.xml","form_type":"4"}},{"id":860902,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-03-04T21:08:00.000Z","date":"2026-03-03","kind":"sale","planned":true,"acquired":false,"shares":5657,"price":20.3,"value":114837.1,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F6","text":"Shares sold to satisfy tax obligations in connection with the vesting of previously granted Restricted Stock Units."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $19.92 to $20.31, inclusive."}],"balance_after":2016883,"source":{"system":"sec-edgar","filing":"0001517413-26-000087","document":"wk-form4_1772658478.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000087/wk-form4_1772658478.xml","form_type":"4"}},{"id":860901,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-03-04T21:08:00.000Z","date":"2026-03-02","kind":"sale","planned":true,"acquired":false,"shares":73479,"price":21.07,"value":1548202.53,"ownership":{"direct":false,"nature":"See Foonote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on  June 3, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.85 to $21.20, inclusive."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The shares are held by The Per Artur Bergman Revocable Trust, of which the reporting person is settlor, sole trustee, and sole beneficiary."}],"balance_after":1909901,"source":{"system":"sec-edgar","filing":"0001517413-26-000087","document":"wk-form4_1772658478.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000087/wk-form4_1772658478.xml","form_type":"4"}},{"id":860900,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-03-04T21:08:00.000Z","date":"2026-03-02","kind":"sale","planned":true,"acquired":false,"shares":187595,"price":20.44,"value":3834441.8,"ownership":{"direct":false,"nature":"See Foonote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on  June 3, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $19.85 to $20.82, inclusive."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The shares are held by The Per Artur Bergman Revocable Trust, of which the reporting person is settlor, sole trustee, and sole beneficiary."}],"balance_after":1983380,"source":{"system":"sec-edgar","filing":"0001517413-26-000087","document":"wk-form4_1772658478.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000087/wk-form4_1772658478.xml","form_type":"4"}},{"id":860899,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-03-04T21:08:00.000Z","date":"2026-03-02","kind":"sale","planned":true,"acquired":false,"shares":13100,"price":19.55,"value":256105.0,"ownership":{"direct":false,"nature":"See Foonote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on  June 3, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $18.85 to $19.84, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (3), (4), (5) and (7) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The shares are held by The Per Artur Bergman Revocable Trust, of which the reporting person is settlor, sole trustee, and sole beneficiary."}],"balance_after":2170975,"source":{"system":"sec-edgar","filing":"0001517413-26-000087","document":"wk-form4_1772658478.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000087/wk-form4_1772658478.xml","form_type":"4"}},{"id":860898,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-03-04T21:08:00.000Z","date":"2026-03-02","kind":"sale","planned":true,"acquired":false,"shares":1060,"price":18.77,"value":19896.2,"ownership":{"direct":false,"nature":"See Foonote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on  June 3, 2025."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The shares are held by The Per Artur Bergman Revocable Trust, of which the reporting person is settlor, sole trustee, and sole beneficiary."}],"balance_after":2184075,"source":{"system":"sec-edgar","filing":"0001517413-26-000087","document":"wk-form4_1772658478.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000087/wk-form4_1772658478.xml","form_type":"4"}},{"id":865555,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-03-03T21:42:40.000Z","date":"2026-02-28","kind":"grant","planned":false,"acquired":true,"shares":168521,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Represents the shares subject to performance-based restricted stock unit awards (PRSUs) earned based on the achievement of pre-established performance goals during the Issuer's fiscal year 2025.\n33% of the number of PRSUs vested on the Transaction Date, and 8.375% of the PRSUs will vest in quarterly installments thereafter on May 28, August 28, November 28, and February 28, subject to\nthe Reporting Person's continued service with the Issuer through each applicable vesting date."}],"balance_after":2022540,"source":{"system":"sec-edgar","filing":"0001517413-26-000078","document":"wk-form4_1772574155.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000078/wk-form4_1772574155.xml","form_type":"4"}},{"id":865554,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-03-03T21:42:40.000Z","date":"2026-02-28","kind":"grant","planned":false,"acquired":true,"shares":12356,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Fully vested. Under the 2025 Bonus Plan, subject to meeting performance criteria, the reporting person was eligible to receive a bonus to be paid in the form of fully-vested restricted stock units."}],"balance_after":1854019,"source":{"system":"sec-edgar","filing":"0001517413-26-000078","document":"wk-form4_1772574155.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000078/wk-form4_1772574155.xml","form_type":"4"}},{"id":873605,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-03-03T00:06:26.000Z","date":"2026-02-27","kind":"sale","planned":false,"acquired":false,"shares":869,"price":17.5,"value":15207.5,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Shares sold to satisfy tax obligations in connection with the vesting of previously granted Restricted Stock Units."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $17.50 to $17.51, inclusive. The reporting person undertakes to\nprovide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in\nfootnote (2) to this Form 4."}],"balance_after":1841663,"source":{"system":"sec-edgar","filing":"0001517413-26-000061","document":"wk-form4_1772496383.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000061/wk-form4_1772496383.xml","form_type":"4"}},{"id":881524,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-02-25T22:14:00.000Z","date":"2026-02-23","kind":"sale","planned":true,"acquired":false,"shares":40000,"price":17.08,"value":683200.0,"ownership":{"direct":false,"nature":"See Foonote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on  June 3, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.63 to $17.53, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (2) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The shares are held by The Per Artur Bergman Revocable Trust, of which the reporting person is settlor, sole trustee, and sole beneficiary."}],"balance_after":2185135,"source":{"system":"sec-edgar","filing":"0001517413-26-000057","document":"wk-form4_1772057637.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000057/wk-form4_1772057637.xml","form_type":"4"}},{"id":887610,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-02-23T21:55:18.000Z","date":"2026-02-19","kind":"sale","planned":true,"acquired":false,"shares":34576,"price":20.1,"value":694977.6,"ownership":{"direct":false,"nature":"See Foonote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on  June 3, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.00 to $20.26, inclusive."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"The shares are held by The Per Artur Bergman Revocable Trust, of which the reporting person is settlor, sole trustee, and sole beneficiary."}],"balance_after":2225135,"source":{"system":"sec-edgar","filing":"0001517413-26-000047","document":"wk-form4_1771883715.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000047/wk-form4_1771883715.xml","form_type":"4"}},{"id":887609,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-02-23T21:55:18.000Z","date":"2026-02-19","kind":"sale","planned":true,"acquired":false,"shares":3900,"price":20.1,"value":78390.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on  June 3, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $19.96 to $20.25, inclusive."}],"balance_after":1842532,"source":{"system":"sec-edgar","filing":"0001517413-26-000047","document":"wk-form4_1771883715.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000047/wk-form4_1771883715.xml","form_type":"4"}},{"id":887608,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-02-23T21:55:18.000Z","date":"2026-02-19","kind":"sale","planned":true,"acquired":false,"shares":14600,"price":19.51,"value":284846.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on  June 3, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $18.96 to $19.95, inclusive."}],"balance_after":1846432,"source":{"system":"sec-edgar","filing":"0001517413-26-000047","document":"wk-form4_1771883715.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000047/wk-form4_1771883715.xml","form_type":"4"}},{"id":887607,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-02-23T21:55:18.000Z","date":"2026-02-19","kind":"sale","planned":true,"acquired":false,"shares":21381,"price":18.24,"value":389989.44,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on  June 3, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $17.96 to $18.95, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) to (5) to this Form 4."}],"balance_after":1861032,"source":{"system":"sec-edgar","filing":"0001517413-26-000047","document":"wk-form4_1771883715.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000047/wk-form4_1771883715.xml","form_type":"4"}},{"id":890317,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-02-20T21:34:39.000Z","date":"2026-02-18","kind":"sale","planned":false,"acquired":false,"shares":18338,"price":17.53,"value":321465.14,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Shares sold to satisfy tax obligations in connection with the vesting of previously granted Restricted Stock Units."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $17.33 to $17.53. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (2)  to this Form 4."}],"balance_after":1882413,"source":{"system":"sec-edgar","filing":"0001517413-26-000044","document":"wk-form4_1771623276.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000044/wk-form4_1771623276.xml","form_type":"4"}},{"id":895984,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-02-18T21:58:08.000Z","date":"2026-02-17","kind":"sale","planned":true,"acquired":false,"shares":11747,"price":17.8,"value":209096.6,"ownership":{"direct":false,"nature":"See Foonote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 3, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $17.68 to $18.59, inclusive."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The shares are held by The Per Artur Bergman Revocable Trust, of which the reporting person is settlor, sole trustee, and sole beneficiary."}],"balance_after":2259711,"source":{"system":"sec-edgar","filing":"0001517413-26-000038","document":"wk-form4_1771451884.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000038/wk-form4_1771451884.xml","form_type":"4"}},{"id":895983,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-02-18T21:58:08.000Z","date":"2026-02-17","kind":"sale","planned":true,"acquired":false,"shares":28253,"price":17.42,"value":492167.26,"ownership":{"direct":false,"nature":"See Foonote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 3, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.68 to $17.67, inclusive."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The shares are held by The Per Artur Bergman Revocable Trust, of which the reporting person is settlor, sole trustee, and sole beneficiary."}],"balance_after":2271458,"source":{"system":"sec-edgar","filing":"0001517413-26-000038","document":"wk-form4_1771451884.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000038/wk-form4_1771451884.xml","form_type":"4"}},{"id":895982,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-02-18T21:58:08.000Z","date":"2026-02-13","kind":"sale","planned":true,"acquired":false,"shares":69800,"price":18.75,"value":1308750.0,"ownership":{"direct":false,"nature":"See Foonote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 3, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $18.50 to $19.14, inclusive."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The shares are held by The Per Artur Bergman Revocable Trust, of which the reporting person is settlor, sole trustee, and sole beneficiary."}],"balance_after":2299711,"source":{"system":"sec-edgar","filing":"0001517413-26-000038","document":"wk-form4_1771451884.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000038/wk-form4_1771451884.xml","form_type":"4"}},{"id":895981,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-02-18T21:58:08.000Z","date":"2026-02-13","kind":"sale","planned":true,"acquired":false,"shares":131047,"price":18.25,"value":2391607.75,"ownership":{"direct":false,"nature":"See Foonote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 3, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $17.50 to $18.49, inclusive."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The shares are held by The Per Artur Bergman Revocable Trust, of which the reporting person is settlor, sole trustee, and sole beneficiary."}],"balance_after":2369511,"source":{"system":"sec-edgar","filing":"0001517413-26-000038","document":"wk-form4_1771451884.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000038/wk-form4_1771451884.xml","form_type":"4"}},{"id":895980,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-02-18T21:58:08.000Z","date":"2026-02-13","kind":"sale","planned":true,"acquired":false,"shares":20128,"price":18.25,"value":367336.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 3, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $17.50 to $18.49. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2), (3), (5), (6) and (7) to this Form 4."}],"balance_after":1900751,"source":{"system":"sec-edgar","filing":"0001517413-26-000038","document":"wk-form4_1771451884.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000038/wk-form4_1771451884.xml","form_type":"4"}},{"id":900407,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-02-17T21:37:53.000Z","date":"2026-02-12","kind":"sale","planned":true,"acquired":false,"shares":35587,"price":17.69,"value":629534.03,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on  June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F2","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed a total of 619,335 shares of common stock of the Issuer in a transaction that resulted in a change in the form of beneficial ownership from direct to indirect."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $17.64 to $17.83, inclusive."}],"balance_after":1920879,"source":{"system":"sec-edgar","filing":"0001517413-26-000036","document":"wk-form4_1771364269.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000036/wk-form4_1771364269.xml","form_type":"4"}},{"id":900406,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-02-17T21:37:53.000Z","date":"2026-02-12","kind":"sale","planned":true,"acquired":false,"shares":132366,"price":17.19,"value":2275371.54,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on  June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F2","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed a total of 619,335 shares of common stock of the Issuer in a transaction that resulted in a change in the form of beneficial ownership from direct to indirect."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.64 to $17.63, inclusive."}],"balance_after":1956466,"source":{"system":"sec-edgar","filing":"0001517413-26-000036","document":"wk-form4_1771364269.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000036/wk-form4_1771364269.xml","form_type":"4"}},{"id":900405,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-02-17T21:37:53.000Z","date":"2026-02-12","kind":"sale","planned":true,"acquired":false,"shares":247039,"price":16.11,"value":3979798.29,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on  June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F2","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed a total of 619,335 shares of common stock of the Issuer in a transaction that resulted in a change in the form of beneficial ownership from direct to indirect."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.64 to $16.63, inclusive."}],"balance_after":2088832,"source":{"system":"sec-edgar","filing":"0001517413-26-000036","document":"wk-form4_1771364269.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000036/wk-form4_1771364269.xml","form_type":"4"}},{"id":900404,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-02-17T21:37:53.000Z","date":"2026-02-12","kind":"sale","planned":true,"acquired":false,"shares":199643,"price":15.11,"value":3016605.73,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on  June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F2","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed a total of 619,335 shares of common stock of the Issuer in a transaction that resulted in a change in the form of beneficial ownership from direct to indirect."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $14.61 to $15.59, inclusive."}],"balance_after":2335871,"source":{"system":"sec-edgar","filing":"0001517413-26-000036","document":"wk-form4_1771364269.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000036/wk-form4_1771364269.xml","form_type":"4"}},{"id":900403,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-02-17T21:37:53.000Z","date":"2026-02-12","kind":"sale","planned":true,"acquired":false,"shares":4700,"price":13.88,"value":65236.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on  June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F2","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed a total of 619,335 shares of common stock of the Issuer in a transaction that resulted in a change in the form of beneficial ownership from direct to indirect."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $13.60 to $14.56. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (3) to (7) to this Form 4."}],"balance_after":2535514,"source":{"system":"sec-edgar","filing":"0001517413-26-000036","document":"wk-form4_1771364269.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000036/wk-form4_1771364269.xml","form_type":"4"}},{"id":909598,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-02-11T21:38:10.000Z","date":"2026-02-09","kind":"sale","planned":true,"acquired":false,"shares":20000,"price":8.84,"value":176800.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on  June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F2","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed 20,000 shares of common stock of the Issuer in a transaction that resulted in a change in the form of beneficial ownership from direct to indirect."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $8.32 to $9.09. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (3) to this Form 4."}],"balance_after":2540214,"source":{"system":"sec-edgar","filing":"0001517413-26-000028","document":"wk-form4_1770845887.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000028/wk-form4_1770845887.xml","form_type":"4"}},{"id":915811,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-02-06T21:59:25.000Z","date":"2026-02-04","kind":"grant","planned":false,"acquired":true,"shares":9635,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The shares are represented by RSUs. Each RSU represents a contingent right to receive one share of the Issuer's Class A Common Stock upon settlement. 100% of the RSUs are initially subject to vesting. 25% of the number of RSUs will vest on February 15, 2026 and 25% of the number of RSUs vest on May 15, 2026, August 15, 2026, and November 15, 2026, respectively, in each case subject to the Reporting Person's continued service with the Issuer through each applicable vesting date."}],"balance_after":2560214,"source":{"system":"sec-edgar","filing":"0001517413-26-000016","document":"wk-form4_1770415162.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000016/wk-form4_1770415162.xml","form_type":"4"}},{"id":919116,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-02-04T22:18:06.000Z","date":"2026-02-02","kind":"sale","planned":true,"acquired":false,"shares":20000,"price":9.36,"value":187200.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on  June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F2","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed 20,000 shares of common stock of the Issuer in a transaction that resulted in a change in the form of beneficial ownership from direct to indirect."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $9.11 to $9.52. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (3) to this Form 4."}],"balance_after":2550579,"source":{"system":"sec-edgar","filing":"0001517413-26-000014","document":"wk-form4_1770243483.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000014/wk-form4_1770243483.xml","form_type":"4"}},{"id":928780,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-01-28T22:24:44.000Z","date":"2026-01-27","kind":"sale","planned":true,"acquired":false,"shares":49320,"price":10.4,"value":512928.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on  June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F4","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed 49,320 shares of common stock of the Issuer in a transaction that resulted in a change in the form of beneficial ownership from direct to indirect."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $10.00 to $10.71, inclusive."}],"balance_after":2570579,"source":{"system":"sec-edgar","filing":"0001517413-26-000012","document":"wk-form4_1769639081.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000012/wk-form4_1769639081.xml","form_type":"4"}},{"id":928779,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-01-28T22:24:44.000Z","date":"2026-01-26","kind":"sale","planned":true,"acquired":false,"shares":30680,"price":9.92,"value":304345.6,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on  June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F2","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed 30,680 shares of common stock of the Issuer in a transaction that resulted in a change in the form of beneficial ownership from direct to indirect."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $9.42 to $10.09. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (3) and (5) to this Form 4."}],"balance_after":2619899,"source":{"system":"sec-edgar","filing":"0001517413-26-000012","document":"wk-form4_1769639081.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000012/wk-form4_1769639081.xml","form_type":"4"}},{"id":934044,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-01-22T00:48:22.000Z","date":"2026-01-20","kind":"sale","planned":true,"acquired":false,"shares":20000,"price":8.18,"value":163600.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on  June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F2","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed 20,000 shares of common stock of the Issuer in a transaction that resulted in a change in the form of beneficial ownership from direct to indirect."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $8.74 to $8.93. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote 3 to this Form 4."}],"balance_after":2650579,"source":{"system":"sec-edgar","filing":"0001517413-26-000008","document":"wk-form4_1769042900.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000008/wk-form4_1769042900.xml","form_type":"4"}},{"id":939104,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-01-14T23:13:20.000Z","date":"2026-01-12","kind":"sale","planned":true,"acquired":false,"shares":20000,"price":9.35,"value":187000.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on  June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F2","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed 20,000 shares of common stock of the Issuer in a transaction that resulted in a change in the form of beneficial ownership from direct to indirect."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $9.27 to $9.44. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote 3 to this Form 4."}],"balance_after":2670579,"source":{"system":"sec-edgar","filing":"0001517413-26-000006","document":"wk-form4_1768432397.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000006/wk-form4_1768432397.xml","form_type":"4"}},{"id":944083,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2026-01-07T21:59:14.000Z","date":"2026-01-05","kind":"sale","planned":true,"acquired":false,"shares":40000,"price":10.27,"value":410800.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on  June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F2","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed 40,000 shares of common stock of the Issuer in a transaction that resulted in a change in the form of beneficial ownership from direct to indirect."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $10.13 to $10.48. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote 3 to this Form 4."}],"balance_after":2690579,"source":{"system":"sec-edgar","filing":"0001517413-26-000002","document":"wk-form4_1767823151.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741326000002/wk-form4_1767823151.xml","form_type":"4"}},{"id":957017,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2025-12-30T21:56:56.000Z","date":"2025-12-29","kind":"sale","planned":true,"acquired":false,"shares":40000,"price":10.23,"value":409200.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on  June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F2","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed 40,000 shares of common stock of the Issuer in a transaction that resulted in a change in the form of beneficial ownership from direct to indirect."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $10.13 to $10.30. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote 3 to this Form 4."}],"balance_after":2730579,"source":{"system":"sec-edgar","filing":"0001517413-25-000359","document":"wk-form4_1767131813.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741325000359/wk-form4_1767131813.xml","form_type":"4"}},{"id":959391,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2025-12-23T21:27:25.000Z","date":"2025-12-22","kind":"sale","planned":true,"acquired":false,"shares":40000,"price":10.59,"value":423600.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F2","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed 40,000 shares of common stock of the Issuer in a transaction that resulted in a change in the form of beneficial ownership from direct to indirect."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $10.11 to $10.78. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (3) to this Form 4."}],"balance_after":2770579,"source":{"system":"sec-edgar","filing":"0001517413-25-000357","document":"wk-form4_1766525241.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741325000357/wk-form4_1766525241.xml","form_type":"4"}},{"id":964539,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2025-12-17T22:52:55.000Z","date":"2025-12-15","kind":"sale","planned":true,"acquired":false,"shares":40000,"price":10.5,"value":420000.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F2","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed 40,000 shares of common stock of the Issuer in a transaction that resulted in a change in the form of beneficial ownership from direct to indirect."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $10.26 to $10.70. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (3) to this Form 4."}],"balance_after":2810579,"source":{"system":"sec-edgar","filing":"0001517413-25-000353","document":"wk-form4_1766011972.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741325000353/wk-form4_1766011972.xml","form_type":"4"}},{"id":974091,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2025-12-10T21:52:55.000Z","date":"2025-12-08","kind":"sale","planned":true,"acquired":false,"shares":40000,"price":10.66,"value":426400.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F2","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed 40,000 shares of common stock of the Issuer in a transaction that resulted in a change in the form of beneficial ownership from direct to indirect."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $10.36 to $11.08. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (3) to this Form 4."}],"balance_after":2850579,"source":{"system":"sec-edgar","filing":"0001517413-25-000345","document":"wk-form4_1765403572.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741325000345/wk-form4_1765403572.xml","form_type":"4"}},{"id":980034,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2025-12-04T22:49:12.000Z","date":"2025-12-02","kind":"sale","planned":true,"acquired":false,"shares":3222,"price":12.51,"value":40307.22,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F2","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed 3,222 shares of common stock of the Issuer in a transaction that resulted in a change in the form of beneficial ownership from direct to indirect."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $12.50 to $12.58. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (3) to this Form 4."}],"balance_after":2890579,"source":{"system":"sec-edgar","filing":"0001517413-25-000337","document":"wk-form4_1764888550.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741325000337/wk-form4_1764888550.xml","form_type":"4"}},{"id":983276,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2025-12-02T21:37:15.000Z","date":"2025-12-01","kind":"sale","planned":true,"acquired":false,"shares":40000,"price":11.51,"value":460400.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F3","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed 41,080 shares of common stock of the Issuer in a transaction that resulted in a change in the form of beneficial ownership from direct to indirect."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $11.21 to $11.75. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (4)  to this Form 4."}],"balance_after":2893801,"source":{"system":"sec-edgar","filing":"0001517413-25-000335","document":"wk-form4_1764711433.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741325000335/wk-form4_1764711433.xml","form_type":"4"}},{"id":983275,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2025-12-02T21:37:15.000Z","date":"2025-12-01","kind":"sale","planned":true,"acquired":false,"shares":1080,"price":11.45,"value":12366.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F3","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed 41,080 shares of common stock of the Issuer in a transaction that resulted in a change in the form of beneficial ownership from direct to indirect."}],"balance_after":2933801,"source":{"system":"sec-edgar","filing":"0001517413-25-000335","document":"wk-form4_1764711433.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741325000335/wk-form4_1764711433.xml","form_type":"4"}},{"id":983274,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2025-12-02T21:37:15.000Z","date":"2025-11-28","kind":"sale","planned":true,"acquired":false,"shares":849,"price":11.82,"value":10035.18,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Shares sold to satisfy tax obligations in connection with the vesting of previously granted Restricted Stock Units."}],"balance_after":2934881,"source":{"system":"sec-edgar","filing":"0001517413-25-000335","document":"wk-form4_1764711433.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741325000335/wk-form4_1764711433.xml","form_type":"4"}},{"id":988397,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2025-11-25T21:54:34.000Z","date":"2025-11-24","kind":"sale","planned":true,"acquired":false,"shares":40000,"price":11.43,"value":457200.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F2","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed 40,000 shares of common stock of the Issuer in a transaction that resulted in a change in the form of beneficial ownership from direct to indirect."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $11.00 to $11.61. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (3) to this Form 4."}],"balance_after":2935730,"source":{"system":"sec-edgar","filing":"0001517413-25-000325","document":"wk-form4_1764107671.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741325000325/wk-form4_1764107671.xml","form_type":"4"}},{"id":992319,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2025-11-20T21:59:41.000Z","date":"2025-11-18","kind":"sale","planned":true,"acquired":false,"shares":34829,"price":10.68,"value":371973.72,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F4","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed 34,829 shares of common stock of the Issuer in a transaction that resulted in a change in\nthe form of beneficial ownership from direct to indirect."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $10.30 to $10.97, inclusive."}],"balance_after":2975730,"source":{"system":"sec-edgar","filing":"0001517413-25-000320","document":"wk-form4_1763675978.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741325000320/wk-form4_1763675978.xml","form_type":"4"}},{"id":992318,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2025-11-20T21:59:41.000Z","date":"2025-11-18","kind":"sale","planned":true,"acquired":false,"shares":27999,"price":10.23,"value":286429.77,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Shares sold to satisfy tax obligations in connection with the vesting of previously granted Restricted Stock Units."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $10.23 to $10.25. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) and (5) to this Form 4."}],"balance_after":3010559,"source":{"system":"sec-edgar","filing":"0001517413-25-000320","document":"wk-form4_1763675978.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741325000320/wk-form4_1763675978.xml","form_type":"4"}},{"id":993533,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2025-11-19T21:57:14.000Z","date":"2025-11-17","kind":"sale","planned":true,"acquired":false,"shares":1000,"price":11.43,"value":11430.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F2","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed 40,000 shares of common stock of the Issuer in a transaction that resulted in a change in the form of beneficial ownership from direct to indirect."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $11.40 to $11.48, inclusive."}],"balance_after":3038558,"source":{"system":"sec-edgar","filing":"0001517413-25-000315","document":"wk-form4_1763589431.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741325000315/wk-form4_1763589431.xml","form_type":"4"}},{"id":993532,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2025-11-19T21:57:14.000Z","date":"2025-11-17","kind":"sale","planned":true,"acquired":false,"shares":39000,"price":10.75,"value":419250.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F2","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed 40,000 shares of common stock of the Issuer in a transaction that resulted in a change in the form of beneficial ownership from direct to indirect."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $10.40 to $11.39. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (3) and (4) to this Form 4."}],"balance_after":3039558,"source":{"system":"sec-edgar","filing":"0001517413-25-000315","document":"wk-form4_1763589431.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741325000315/wk-form4_1763589431.xml","form_type":"4"}},{"id":998703,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2025-11-14T21:58:28.000Z","date":"2025-11-12","kind":"sale","planned":true,"acquired":false,"shares":2718,"price":12.51,"value":34002.18,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F2","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed 2,718 shares of common stock of the Issuer in a transaction that resulted in a change in the form of beneficial ownership from direct to indirect."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $12.50 to $12.52. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (3) to this Form 4."}],"balance_after":3078558,"source":{"system":"sec-edgar","filing":"0001517413-25-000305","document":"wk-form4_1763157505.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741325000305/wk-form4_1763157505.xml","form_type":"4"}},{"id":1001635,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2025-11-12T22:02:56.000Z","date":"2025-11-10","kind":"sale","planned":true,"acquired":false,"shares":40000,"price":11.92,"value":476800.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F2","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed 40,000 shares of common stock of the Issuer in a transaction that resulted in a change in the form of beneficial ownership from direct to indirect."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $11.70 to $12.13. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (3) to this Form 4."}],"balance_after":3081276,"source":{"system":"sec-edgar","filing":"0001517413-25-000303","document":"wk-form4_1762984972.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741325000303/wk-form4_1762984972.xml","form_type":"4"}},{"id":1003476,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2025-11-10T21:34:42.000Z","date":"2025-11-06","kind":"sale","planned":true,"acquired":false,"shares":66467,"price":11.07,"value":735789.69,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F2","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed 220,000 shares of common stock of the Issuer in a transaction that resulted in a change in the form of beneficial ownership from direct to indirect."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $11.01 to $11.21, inclusive."}],"balance_after":3121276,"source":{"system":"sec-edgar","filing":"0001517413-25-000301","document":"wk-form4_1762810478.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741325000301/wk-form4_1762810478.xml","form_type":"4"}},{"id":1003475,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2025-11-10T21:34:42.000Z","date":"2025-11-06","kind":"sale","planned":true,"acquired":false,"shares":153533,"price":10.49,"value":1610561.17,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F2","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed 220,000 shares of common stock of the Issuer in a transaction that resulted in a change in the form of beneficial ownership from direct to indirect."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $10.01 to $11.00. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (3) and (4) to this Form 4."}],"balance_after":3187743,"source":{"system":"sec-edgar","filing":"0001517413-25-000301","document":"wk-form4_1762810478.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741325000301/wk-form4_1762810478.xml","form_type":"4"}},{"id":1006634,"issuer":{"id":785,"kind":"organization","name":"Fastly, Inc.","symbol":"FSLY"},"owners":[{"id":814,"kind":"person","name":"Bergman Artur","position":1,"cik":"0001769490","reported_name":"Bergman Artur","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Technology Officer"}}],"security":"Class A Common Stock","published_at":"2025-11-05T22:18:41.000Z","date":"2025-11-03","kind":"sale","planned":true,"acquired":false,"shares":20000,"price":8.21,"value":164200.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 3, 2025."},{"field":"shares","element":"transactionShares","label":"F2","text":"The shares were sold by the Per Artur Bergman Revocable Trust, to which the reporting person contributed 20,000 shares of common stock of the Issuer in a transaction that resulted in a change in the form of beneficial ownership from direct to indirect."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $8.07 to $8.33. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (3) to this Form 4."}],"balance_after":3341276,"source":{"system":"sec-edgar","filing":"0001517413-25-000295","document":"wk-form4_1762381118.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1517413/000151741325000295/wk-form4_1762381118.xml","form_type":"4"}}],"next_cursor":"2025-11-05T22:18:41.000000Z,1006634"}