{"transactions":[{"id":2556364,"issuer":{"id":5503,"kind":"organization","name":"C4 Therapeutics, Inc.","symbol":"CCCC"},"owners":[{"id":135152,"kind":"person","name":"Prokupets Elena","position":1,"cik":"0001824823","reported_name":"Prokupets Elena","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-09-29T22:33:43.000Z","date":"2021-09-27","kind":"sale","acquired":false,"shares":1311,"price":50.0412,"value":65604.0132,"ownership":{"direct":false,"nature":"By ERP Business Holdings, LP"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 15, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.19. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Shares held by ERP Business Holdings, L.P. The Reporting Person disclaims beneficial ownership of these shares except to the extent of her pecuniary interest therein."}],"balance_after":503126,"source":{"system":"sec-edgar","filing":"0001209191-21-058111","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1662579/000120919121058111/doc4.xml","form_type":"4"}},{"id":2556363,"issuer":{"id":5503,"kind":"organization","name":"C4 Therapeutics, Inc.","symbol":"CCCC"},"owners":[{"id":135152,"kind":"person","name":"Prokupets Elena","position":1,"cik":"0001824823","reported_name":"Prokupets Elena","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-09-29T22:33:43.000Z","date":"2021-09-27","kind":"sale","acquired":false,"shares":539,"price":50.0353,"value":26969.0267,"ownership":{"direct":false,"nature":"By Spouse"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.09. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request."}],"balance_after":31681,"source":{"system":"sec-edgar","filing":"0001209191-21-058111","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1662579/000120919121058111/doc4.xml","form_type":"4"}},{"id":2559516,"issuer":{"id":5503,"kind":"organization","name":"C4 Therapeutics, Inc.","symbol":"CCCC"},"owners":[{"id":135152,"kind":"person","name":"Prokupets Elena","position":1,"cik":"0001824823","reported_name":"Prokupets Elena","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-09-24T20:51:26.000Z","date":"2021-09-24","kind":"sale","acquired":false,"shares":2115,"price":50.101,"value":105963.615,"ownership":{"direct":false,"nature":"By ERP Business Holdings, LP"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 15, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.34. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Shares held by ERP Business Holdings, L.P. The Reporting Person disclaims beneficial ownership of these shares except to the extent of her pecuniary interest therein."}],"balance_after":504437,"source":{"system":"sec-edgar","filing":"0001209191-21-057633","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1662579/000120919121057633/doc4.xml","form_type":"4"}},{"id":2559515,"issuer":{"id":5503,"kind":"organization","name":"C4 Therapeutics, Inc.","symbol":"CCCC"},"owners":[{"id":135152,"kind":"person","name":"Prokupets Elena","position":1,"cik":"0001824823","reported_name":"Prokupets Elena","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-09-24T20:51:26.000Z","date":"2021-09-24","kind":"sale","acquired":false,"shares":900,"price":50.1125,"value":45101.25,"ownership":{"direct":false,"nature":"By Spouse"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F9","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.28. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request."}],"balance_after":32220,"source":{"system":"sec-edgar","filing":"0001209191-21-057633","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1662579/000120919121057633/doc4.xml","form_type":"4"}},{"id":2559514,"issuer":{"id":5503,"kind":"organization","name":"C4 Therapeutics, Inc.","symbol":"CCCC"},"owners":[{"id":135152,"kind":"person","name":"Prokupets Elena","position":1,"cik":"0001824823","reported_name":"Prokupets Elena","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-09-24T20:51:26.000Z","date":"2021-09-23","kind":"sale","acquired":false,"shares":1007,"price":51.0772,"value":51434.7404,"ownership":{"direct":false,"nature":"By ERP Business Holdings, LP"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 15, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F8","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $51.00 to $51.16. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Shares held by ERP Business Holdings, L.P. The Reporting Person disclaims beneficial ownership of these shares except to the extent of her pecuniary interest therein."}],"balance_after":506552,"source":{"system":"sec-edgar","filing":"0001209191-21-057633","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1662579/000120919121057633/doc4.xml","form_type":"4"}},{"id":2559513,"issuer":{"id":5503,"kind":"organization","name":"C4 Therapeutics, Inc.","symbol":"CCCC"},"owners":[{"id":135152,"kind":"person","name":"Prokupets Elena","position":1,"cik":"0001824823","reported_name":"Prokupets Elena","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-09-24T20:51:26.000Z","date":"2021-09-23","kind":"sale","acquired":false,"shares":11801,"price":50.3511,"value":594193.3311,"ownership":{"direct":false,"nature":"By ERP Business Holdings, LP"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 15, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.99. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Shares held by ERP Business Holdings, L.P. The Reporting Person disclaims beneficial ownership of these shares except to the extent of her pecuniary interest therein."}],"balance_after":507559,"source":{"system":"sec-edgar","filing":"0001209191-21-057633","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1662579/000120919121057633/doc4.xml","form_type":"4"}},{"id":2559512,"issuer":{"id":5503,"kind":"organization","name":"C4 Therapeutics, Inc.","symbol":"CCCC"},"owners":[{"id":135152,"kind":"person","name":"Prokupets Elena","position":1,"cik":"0001824823","reported_name":"Prokupets Elena","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-09-24T20:51:26.000Z","date":"2021-09-23","kind":"sale","acquired":false,"shares":446,"price":51.0861,"value":22784.4006,"ownership":{"direct":false,"nature":"By Spouse"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $51.04 to $51.16. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request."}],"balance_after":33120,"source":{"system":"sec-edgar","filing":"0001209191-21-057633","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1662579/000120919121057633/doc4.xml","form_type":"4"}},{"id":2559511,"issuer":{"id":5503,"kind":"organization","name":"C4 Therapeutics, Inc.","symbol":"CCCC"},"owners":[{"id":135152,"kind":"person","name":"Prokupets Elena","position":1,"cik":"0001824823","reported_name":"Prokupets Elena","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-09-24T20:51:26.000Z","date":"2021-09-23","kind":"sale","acquired":false,"shares":5926,"price":50.3475,"value":298359.285,"ownership":{"direct":false,"nature":"By Spouse"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.99. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request."}],"balance_after":33566,"source":{"system":"sec-edgar","filing":"0001209191-21-057633","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1662579/000120919121057633/doc4.xml","form_type":"4"}},{"id":2559510,"issuer":{"id":5503,"kind":"organization","name":"C4 Therapeutics, Inc.","symbol":"CCCC"},"owners":[{"id":135152,"kind":"person","name":"Prokupets Elena","position":1,"cik":"0001824823","reported_name":"Prokupets Elena","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-09-24T20:51:26.000Z","date":"2021-09-22","kind":"sale","acquired":false,"shares":7004,"price":50.0943,"value":350860.4772,"ownership":{"direct":false,"nature":"By ERP Business Holdings, LP"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 15, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.34. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Shares held by ERP Business Holdings, L.P. The Reporting Person disclaims beneficial ownership of these shares except to the extent of her pecuniary interest therein."}],"balance_after":519360,"source":{"system":"sec-edgar","filing":"0001209191-21-057633","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1662579/000120919121057633/doc4.xml","form_type":"4"}},{"id":2559509,"issuer":{"id":5503,"kind":"organization","name":"C4 Therapeutics, Inc.","symbol":"CCCC"},"owners":[{"id":135152,"kind":"person","name":"Prokupets Elena","position":1,"cik":"0001824823","reported_name":"Prokupets Elena","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-09-24T20:51:26.000Z","date":"2021-09-22","kind":"sale","acquired":false,"shares":3544,"price":50.1,"value":177554.4,"ownership":{"direct":false,"nature":"By Spouse"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.31. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request."}],"balance_after":39492,"source":{"system":"sec-edgar","filing":"0001209191-21-057633","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1662579/000120919121057633/doc4.xml","form_type":"4"}},{"id":2562633,"issuer":{"id":5503,"kind":"organization","name":"C4 Therapeutics, Inc.","symbol":"CCCC"},"owners":[{"id":135152,"kind":"person","name":"Prokupets Elena","position":1,"cik":"0001824823","reported_name":"Prokupets Elena","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-09-21T23:26:03.000Z","date":"2021-09-21","kind":"sale","acquired":false,"shares":5333,"price":50.1425,"value":267409.9525,"ownership":{"direct":false,"nature":"By ERP Business Holdings, LP"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 15, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.42. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Shares held by ERP Business Holdings, L.P. The Reporting Person disclaims beneficial ownership of these shares except to the extent of her pecuniary interest therein."}],"balance_after":526364,"source":{"system":"sec-edgar","filing":"0001209191-21-057118","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1662579/000120919121057118/doc4.xml","form_type":"4"}},{"id":2562632,"issuer":{"id":5503,"kind":"organization","name":"C4 Therapeutics, Inc.","symbol":"CCCC"},"owners":[{"id":135152,"kind":"person","name":"Prokupets Elena","position":1,"cik":"0001824823","reported_name":"Prokupets Elena","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-09-21T23:26:03.000Z","date":"2021-09-21","kind":"sale","acquired":false,"shares":4988,"price":50.1306,"value":250051.4328,"ownership":{"direct":false,"nature":"By Spouse"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.42. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request."}],"balance_after":43036,"source":{"system":"sec-edgar","filing":"0001209191-21-057118","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1662579/000120919121057118/doc4.xml","form_type":"4"}},{"id":2562631,"issuer":{"id":5503,"kind":"organization","name":"C4 Therapeutics, Inc.","symbol":"CCCC"},"owners":[{"id":135152,"kind":"person","name":"Prokupets Elena","position":1,"cik":"0001824823","reported_name":"Prokupets Elena","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-09-21T23:26:03.000Z","date":"2021-09-17","kind":"sale","acquired":false,"shares":5688,"price":50.0504,"value":284686.6752,"ownership":{"direct":false,"nature":"By ERP Business Holdings, LP"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 15, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.18. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Shares held by ERP Business Holdings, L.P. The Reporting Person disclaims beneficial ownership of these shares except to the extent of her pecuniary interest therein."}],"balance_after":531697,"source":{"system":"sec-edgar","filing":"0001209191-21-057118","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1662579/000120919121057118/doc4.xml","form_type":"4"}},{"id":2562630,"issuer":{"id":5503,"kind":"organization","name":"C4 Therapeutics, Inc.","symbol":"CCCC"},"owners":[{"id":135152,"kind":"person","name":"Prokupets Elena","position":1,"cik":"0001824823","reported_name":"Prokupets Elena","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-09-21T23:26:03.000Z","date":"2021-09-17","kind":"sale","acquired":false,"shares":5152,"price":50.0404,"value":257808.1408,"ownership":{"direct":false,"nature":"By Spouse"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.18. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request."}],"balance_after":48024,"source":{"system":"sec-edgar","filing":"0001209191-21-057118","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1662579/000120919121057118/doc4.xml","form_type":"4"}},{"id":2567265,"issuer":{"id":5503,"kind":"organization","name":"C4 Therapeutics, Inc.","symbol":"CCCC"},"owners":[{"id":135152,"kind":"person","name":"Prokupets Elena","position":1,"cik":"0001824823","reported_name":"Prokupets Elena","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-09-16T23:31:46.000Z","date":"2021-09-16","kind":"sale","acquired":false,"shares":346,"price":50.0146,"value":17305.0516,"ownership":{"direct":false,"nature":"By ERP Business Holdings, LP"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 15, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F9","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.045. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Shares held by ERP Business Holdings, L.P. The Reporting Person disclaims beneficial ownership of these shares except to the extent of her pecuniary interest therein."}],"balance_after":510385,"source":{"system":"sec-edgar","filing":"0001209191-21-056482","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1662579/000120919121056482/doc4.xml","form_type":"4"}},{"id":2567264,"issuer":{"id":5503,"kind":"organization","name":"C4 Therapeutics, Inc.","symbol":"CCCC"},"owners":[{"id":135152,"kind":"person","name":"Prokupets Elena","position":1,"cik":"0001824823","reported_name":"Prokupets Elena","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-09-16T23:31:46.000Z","date":"2021-09-16","kind":"sale","acquired":false,"shares":25807,"price":48.6177,"value":1254676.9839,"ownership":{"direct":false,"nature":"By ERP Business Holdings, LP"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F8","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $48.50 to $49.165. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Shares held by ERP Business Holdings, L.P. The Reporting Person disclaims beneficial ownership of these shares except to the extent of her pecuniary interest therein."}],"balance_after":510731,"source":{"system":"sec-edgar","filing":"0001209191-21-056482","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1662579/000120919121056482/doc4.xml","form_type":"4"}},{"id":2567263,"issuer":{"id":5503,"kind":"organization","name":"C4 Therapeutics, Inc.","symbol":"CCCC"},"owners":[{"id":135152,"kind":"person","name":"Prokupets Elena","position":1,"cik":"0001824823","reported_name":"Prokupets Elena","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-09-16T23:31:46.000Z","date":"2021-09-16","kind":"sale","acquired":false,"shares":346,"price":50.0085,"value":17302.941,"ownership":{"direct":false,"nature":"By Spouse"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.05. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request."}],"balance_after":53176,"source":{"system":"sec-edgar","filing":"0001209191-21-056482","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1662579/000120919121056482/doc4.xml","form_type":"4"}},{"id":2567262,"issuer":{"id":5503,"kind":"organization","name":"C4 Therapeutics, Inc.","symbol":"CCCC"},"owners":[{"id":135152,"kind":"person","name":"Prokupets Elena","position":1,"cik":"0001824823","reported_name":"Prokupets Elena","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-09-16T23:31:46.000Z","date":"2021-09-15","kind":"sale","acquired":false,"shares":24193,"price":48.9683,"value":1184690.0819,"ownership":{"direct":false,"nature":"By ERP Business Holdings, LP"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 15, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $48.80 to $49.32. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Shares held by ERP Business Holdings, L.P. The Reporting Person disclaims beneficial ownership of these shares except to the extent of her pecuniary interest therein."}],"balance_after":563538,"source":{"system":"sec-edgar","filing":"0001209191-21-056482","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1662579/000120919121056482/doc4.xml","form_type":"4"}},{"id":2567261,"issuer":{"id":5503,"kind":"organization","name":"C4 Therapeutics, Inc.","symbol":"CCCC"},"owners":[{"id":135152,"kind":"person","name":"Prokupets Elena","position":1,"cik":"0001824823","reported_name":"Prokupets Elena","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-09-16T23:31:46.000Z","date":"2021-09-15","kind":"sale","acquired":false,"shares":30000,"price":48.7068,"value":1461204.0,"ownership":{"direct":false,"nature":"By Spouse"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $48.25 to $49.00. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request."}],"balance_after":53522,"source":{"system":"sec-edgar","filing":"0001209191-21-056482","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1662579/000120919121056482/doc4.xml","form_type":"4"}},{"id":2567260,"issuer":{"id":5503,"kind":"organization","name":"C4 Therapeutics, Inc.","symbol":"CCCC"},"owners":[{"id":135152,"kind":"person","name":"Prokupets Elena","position":1,"cik":"0001824823","reported_name":"Prokupets Elena","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-09-16T23:31:46.000Z","date":"2021-09-14","kind":"sale","acquired":false,"shares":492,"price":50.0276,"value":24613.5792,"ownership":{"direct":false,"nature":"By ERP Business Holdings, LP"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 15, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.145. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Shares held by ERP Business Holdings, L.P. The Reporting Person disclaims beneficial ownership of these shares except to the extent of her pecuniary interest therein."}],"balance_after":587731,"source":{"system":"sec-edgar","filing":"0001209191-21-056482","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1662579/000120919121056482/doc4.xml","form_type":"4"}},{"id":2567259,"issuer":{"id":5503,"kind":"organization","name":"C4 Therapeutics, Inc.","symbol":"CCCC"},"owners":[{"id":135152,"kind":"person","name":"Prokupets Elena","position":1,"cik":"0001824823","reported_name":"Prokupets Elena","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-09-16T23:31:46.000Z","date":"2021-09-14","kind":"sale","acquired":false,"shares":492,"price":50.0069,"value":24603.3948,"ownership":{"direct":false,"nature":"By Spouse"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.145. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request."}],"balance_after":83522,"source":{"system":"sec-edgar","filing":"0001209191-21-056482","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1662579/000120919121056482/doc4.xml","form_type":"4"}},{"id":2570324,"issuer":{"id":5503,"kind":"organization","name":"C4 Therapeutics, Inc.","symbol":"CCCC"},"owners":[{"id":135152,"kind":"person","name":"Prokupets Elena","position":1,"cik":"0001824823","reported_name":"Prokupets Elena","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-09-14T20:10:04.000Z","date":"2021-09-13","kind":"sale","acquired":false,"shares":3330,"price":50.0731,"value":166743.423,"ownership":{"direct":false,"nature":"By ERP Business Holdings, LP"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 15, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.54. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Shares held by ERP Business Holdings, L.P. The Reporting Person disclaims beneficial ownership of these shares except to the extent of her pecuniary interest therein."}],"balance_after":588223,"source":{"system":"sec-edgar","filing":"0001209191-21-055886","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1662579/000120919121055886/doc4.xml","form_type":"4"}},{"id":2570323,"issuer":{"id":5503,"kind":"organization","name":"C4 Therapeutics, Inc.","symbol":"CCCC"},"owners":[{"id":135152,"kind":"person","name":"Prokupets Elena","position":1,"cik":"0001824823","reported_name":"Prokupets Elena","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-09-14T20:10:04.000Z","date":"2021-09-13","kind":"sale","acquired":false,"shares":3330,"price":50.0692,"value":166730.436,"ownership":{"direct":false,"nature":"By Spouse"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.54. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request."}],"balance_after":84014,"source":{"system":"sec-edgar","filing":"0001209191-21-055886","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1662579/000120919121055886/doc4.xml","form_type":"4"}},{"id":2570322,"issuer":{"id":5503,"kind":"organization","name":"C4 Therapeutics, Inc.","symbol":"CCCC"},"owners":[{"id":135152,"kind":"person","name":"Prokupets Elena","position":1,"cik":"0001824823","reported_name":"Prokupets Elena","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-09-14T20:10:04.000Z","date":"2021-09-10","kind":"sale","acquired":false,"shares":1320,"price":50.0075,"value":66009.9,"ownership":{"direct":false,"nature":"By ERP Business Holdings, LP"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 15, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.03. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Shares held by ERP Business Holdings, L.P. The Reporting Person disclaims beneficial ownership of these shares except to the extent of her pecuniary interest therein."}],"balance_after":591553,"source":{"system":"sec-edgar","filing":"0001209191-21-055886","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1662579/000120919121055886/doc4.xml","form_type":"4"}},{"id":2570321,"issuer":{"id":5503,"kind":"organization","name":"C4 Therapeutics, Inc.","symbol":"CCCC"},"owners":[{"id":135152,"kind":"person","name":"Prokupets Elena","position":1,"cik":"0001824823","reported_name":"Prokupets Elena","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-09-14T20:10:04.000Z","date":"2021-09-10","kind":"sale","acquired":false,"shares":1230,"price":50.0008,"value":61500.984,"ownership":{"direct":false,"nature":"By Spouse"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.03. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request."}],"balance_after":87344,"source":{"system":"sec-edgar","filing":"0001209191-21-055886","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1662579/000120919121055886/doc4.xml","form_type":"4"}},{"id":2612488,"issuer":{"id":5503,"kind":"organization","name":"C4 Therapeutics, Inc.","symbol":"CCCC"},"owners":[{"id":135152,"kind":"person","name":"Prokupets Elena","position":1,"cik":"0001824823","reported_name":"Prokupets Elena","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-08-05T23:35:15.000Z","date":"2021-08-03","kind":"sale","acquired":false,"shares":14407,"price":45.1577,"value":650586.9839,"ownership":{"direct":false,"nature":"By Spouse"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $45.00 to $45.38. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request."}],"balance_after":88574,"source":{"system":"sec-edgar","filing":"0001209191-21-050057","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1662579/000120919121050057/doc4.xml","form_type":"4"}},{"id":2619659,"issuer":{"id":5503,"kind":"organization","name":"C4 Therapeutics, Inc.","symbol":"CCCC"},"owners":[{"id":135152,"kind":"person","name":"Prokupets Elena","position":1,"cik":"0001824823","reported_name":"Prokupets Elena","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-08-02T22:47:40.000Z","date":"2021-08-02","kind":"sale","acquired":false,"shares":4257,"price":45.0097,"value":191606.2929,"ownership":{"direct":false,"nature":"By Spouse"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $45.00 to $45.15. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request."}],"balance_after":102981,"source":{"system":"sec-edgar","filing":"0001209191-21-049118","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1662579/000120919121049118/doc4.xml","form_type":"4"}},{"id":2619658,"issuer":{"id":5503,"kind":"organization","name":"C4 Therapeutics, Inc.","symbol":"CCCC"},"owners":[{"id":135152,"kind":"person","name":"Prokupets Elena","position":1,"cik":"0001824823","reported_name":"Prokupets Elena","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-08-02T22:47:40.000Z","date":"2021-07-29","kind":"sale","acquired":false,"shares":11336,"price":45.0042,"value":510167.6112,"ownership":{"direct":false,"nature":"By Spouse"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $45.00 to $45.07. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request."}],"balance_after":107238,"source":{"system":"sec-edgar","filing":"0001209191-21-049118","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1662579/000120919121049118/doc4.xml","form_type":"4"}},{"id":2662768,"issuer":{"id":5503,"kind":"organization","name":"C4 Therapeutics, Inc.","symbol":"CCCC"},"owners":[{"id":135152,"kind":"person","name":"Prokupets Elena","position":1,"cik":"0001824823","reported_name":"Prokupets Elena","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2021-06-17T20:16:01.000Z","date":"2021-06-15","kind":"grant","acquired":true,"shares":23500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"This option shall vest and become exercisable in full upon the earlier to occur of (i) June 15, 2022 and (ii) the next annual meeting of the Issuer's stockholders."}],"balance_after":23500,"derivative":{"exercise_price":37.66,"expiration_date":"2031-06-14","underlying":"Common Stock","underlying_shares":23500},"source":{"system":"sec-edgar","filing":"0001209191-21-041426","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1662579/000120919121041426/doc4.xml","form_type":"4"}},{"id":3011342,"issuer":{"id":5503,"kind":"organization","name":"C4 Therapeutics, Inc.","symbol":"CCCC"},"owners":[{"id":135152,"kind":"person","name":"Prokupets Elena","position":1,"cik":"0001824823","reported_name":"Prokupets Elena","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Series A Preferred Stock","published_at":"2020-10-07T01:23:50.000Z","date":"2020-10-06","kind":"exercise","acquired":false,"shares":5000000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By ERP Business Holdings, LP"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each share of Series A Preferred Stock automatically converted into the Issuer's Common Stock on a 8.4335-to-one basis upon the closing of the Issuer's initial public offering on October 6, 2020 and had no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Each share of Series A Preferred Stock automatically converted into the Issuer's Common Stock on a 8.4335-to-one basis upon the closing of the Issuer's initial public offering on October 6, 2020 and had no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Each share of Series A Preferred Stock automatically converted into the Issuer's Common Stock on a 8.4335-to-one basis upon the closing of the Issuer's initial public offering on October 6, 2020 and had no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Shares held by ERP Business Holdings, LP. The Reporting Person disclaims beneficial ownership of these shares except to the extent of her pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":592873},"source":{"system":"sec-edgar","filing":"0000899243-20-027688","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1662579/000089924320027688/doc4.xml","form_type":"4"}},{"id":3011341,"issuer":{"id":5503,"kind":"organization","name":"C4 Therapeutics, Inc.","symbol":"CCCC"},"owners":[{"id":135152,"kind":"person","name":"Prokupets Elena","position":1,"cik":"0001824823","reported_name":"Prokupets Elena","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Series A Preferred Stock","published_at":"2020-10-07T01:23:50.000Z","date":"2020-10-06","kind":"exercise","acquired":false,"shares":1000000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Spouse"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each share of Series A Preferred Stock automatically converted into the Issuer's Common Stock on a 8.4335-to-one basis upon the closing of the Issuer's initial public offering on October 6, 2020 and had no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Each share of Series A Preferred Stock automatically converted into the Issuer's Common Stock on a 8.4335-to-one basis upon the closing of the Issuer's initial public offering on October 6, 2020 and had no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Each share of Series A Preferred Stock automatically converted into the Issuer's Common Stock on a 8.4335-to-one basis upon the closing of the Issuer's initial public offering on October 6, 2020 and had no expiration date."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":118574},"source":{"system":"sec-edgar","filing":"0000899243-20-027688","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1662579/000089924320027688/doc4.xml","form_type":"4"}},{"id":3011340,"issuer":{"id":5503,"kind":"organization","name":"C4 Therapeutics, Inc.","symbol":"CCCC"},"owners":[{"id":135152,"kind":"person","name":"Prokupets Elena","position":1,"cik":"0001824823","reported_name":"Prokupets Elena","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-10-07T01:23:50.000Z","date":"2020-10-06","kind":"exercise","acquired":true,"shares":592873,"ownership":{"direct":false,"nature":"By ERP Business Holdings, LP"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each share of Series A Preferred Stock automatically converted into the Issuer's Common Stock on a 8.4335-to-one basis upon the closing of the Issuer's initial public offering on October 6, 2020 and had no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Shares held by ERP Business Holdings, LP. The Reporting Person disclaims beneficial ownership of these shares except to the extent of her pecuniary interest therein."}],"balance_after":592873,"source":{"system":"sec-edgar","filing":"0000899243-20-027688","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1662579/000089924320027688/doc4.xml","form_type":"4"}},{"id":3011339,"issuer":{"id":5503,"kind":"organization","name":"C4 Therapeutics, Inc.","symbol":"CCCC"},"owners":[{"id":135152,"kind":"person","name":"Prokupets Elena","position":1,"cik":"0001824823","reported_name":"Prokupets Elena","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-10-07T01:23:50.000Z","date":"2020-10-06","kind":"exercise","acquired":true,"shares":118574,"ownership":{"direct":false,"nature":"By Spouse"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each share of Series A Preferred Stock automatically converted into the Issuer's Common Stock on a 8.4335-to-one basis upon the closing of the Issuer's initial public offering on October 6, 2020 and had no expiration date."}],"balance_after":118574,"source":{"system":"sec-edgar","filing":"0000899243-20-027688","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1662579/000089924320027688/doc4.xml","form_type":"4"}},{"id":3012390,"issuer":{"id":5503,"kind":"organization","name":"C4 Therapeutics, Inc.","symbol":"CCCC"},"owners":[{"id":135152,"kind":"person","name":"Prokupets Elena","position":1,"cik":"0001824823","reported_name":"Prokupets Elena","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2020-10-06T01:00:16.000Z","date":"2020-10-01","kind":"grant","acquired":true,"shares":17786,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"This option shall vest and become exercisable upon the earlier to occur of (i) October 1, 2021, and (ii) the next annual meeting of the Issuer's stockholders."}],"balance_after":17786,"derivative":{"exercise_price":19,"expiration_date":"2030-09-30","underlying":"Common Stock","underlying_shares":17786},"source":{"system":"sec-edgar","filing":"0000899243-20-027446","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1662579/000089924320027446/doc4.xml","form_type":"4"}}]}