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The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer or a security holder of the Issuer, full information regarding the number of shares sold at each respective price within the range set forth in this footnote."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 6,538 shares underlying restricted stock units."}],"balance_after":105134,"source":{"system":"sec-edgar","filing":"0001193125-26-418094","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1818261/000119312526418094/ownership.xml","form_type":"4"}},{"id":4638088,"issuer":{"id":4044,"kind":"organization","name":"Relay Therapeutics, Inc.","symbol":"RLAY"},"owners":[{"id":22284,"kind":"person","name":"Catinazzo Thomas","position":1,"cik":"0001818261","reported_name":"Catinazzo Thomas","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2026-10-08T21:29:11.000Z","date":"2026-10-06","kind":"sale","planned":true,"acquired":false,"shares":17511,"price":18.58,"value":325354.38,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on October 30, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $18.20 to $19.17. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer or a security holder of the Issuer, full information regarding the number of shares sold at each respective price within the range set forth in this footnote."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 6,538 shares underlying restricted stock units."}],"balance_after":105340,"source":{"system":"sec-edgar","filing":"0001193125-26-418094","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818261/000119312526418094/ownership.xml","form_type":"4"}},{"id":4613311,"issuer":{"id":4044,"kind":"organization","name":"Relay Therapeutics, Inc.","symbol":"RLAY"},"owners":[{"id":22284,"kind":"person","name":"Catinazzo Thomas","position":1,"cik":"0001818261","reported_name":"Catinazzo Thomas","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2026-09-09T20:15:31.000Z","date":"2026-09-08","kind":"sale","planned":true,"acquired":false,"shares":17717,"price":18.94,"value":335559.98,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on October 30, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $18.34 to $19.25. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer or a security holder of the Issuer, full information regarding the number of shares sold at each respective price within the range set forth in this footnote."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 6,538 shares underlying restricted stock units."}],"balance_after":122851,"source":{"system":"sec-edgar","filing":"0001193125-26-386464","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818261/000119312526386464/ownership.xml","form_type":"4"}},{"id":683661,"issuer":{"id":4044,"kind":"organization","name":"Relay Therapeutics, Inc.","symbol":"RLAY"},"owners":[{"id":22284,"kind":"person","name":"Catinazzo Thomas","position":1,"cik":"0001818261","reported_name":"Catinazzo Thomas","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2026-08-18T20:16:27.000Z","date":"2026-08-14","kind":"sale","planned":true,"acquired":false,"shares":17717,"price":19.74,"value":349733.58,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on October 30, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $19.51 to $19.96. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer or a security holder of the Issuer, full information regarding the number of shares sold at each respective price within the range set forth in this footnote."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 6,538 shares underlying restricted stock units."}],"balance_after":140568,"source":{"system":"sec-edgar","filing":"0001193125-26-355493","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818261/000119312526355493/ownership.xml","form_type":"4"}},{"id":700745,"issuer":{"id":4044,"kind":"organization","name":"Relay Therapeutics, Inc.","symbol":"RLAY"},"owners":[{"id":22284,"kind":"person","name":"Catinazzo Thomas","position":1,"cik":"0001818261","reported_name":"Catinazzo Thomas","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2026-07-30T20:13:47.000Z","date":"2026-07-28","kind":"sale","planned":false,"acquired":false,"shares":1459,"price":18.61,"value":27151.99,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Sale of shares to cover the reporting person's income tax withholding obligations upon the vesting of 3,269 shares of restricted stock units (\"RSUs\") on July 27, 2026. The reporting person had no discretion with respect to such sale, which was transacted in accordance with the Issuer's policies regarding the vesting of RSUs."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 6,538 shares underlying RSUs."}],"balance_after":158285,"source":{"system":"sec-edgar","filing":"0001193125-26-326144","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818261/000119312526326144/ownership.xml","form_type":"4"}},{"id":712697,"issuer":{"id":4044,"kind":"organization","name":"Relay Therapeutics, Inc.","symbol":"RLAY"},"owners":[{"id":22284,"kind":"person","name":"Catinazzo Thomas","position":1,"cik":"0001818261","reported_name":"Catinazzo Thomas","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2026-07-08T21:07:18.000Z","date":"2026-07-06","kind":"sale","planned":true,"acquired":false,"shares":17717,"price":18.69,"value":331130.73,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on October 30, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $18.39 to $19.38. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer or a security holder of the Issuer, full information regarding the number of shares sold at each respective price within the range set forth in this footnote."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 9,807 shares underlying restricted stock units."}],"balance_after":159744,"source":{"system":"sec-edgar","filing":"0001193125-26-298679","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818261/000119312526298679/ownership.xml","form_type":"4"}},{"id":727780,"issuer":{"id":4044,"kind":"organization","name":"Relay Therapeutics, Inc.","symbol":"RLAY"},"owners":[{"id":22284,"kind":"person","name":"Catinazzo Thomas","position":1,"cik":"0001818261","reported_name":"Catinazzo Thomas","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Stock Option (Right to Buy)","published_at":"2026-06-24T20:09:57.000Z","date":"2026-06-22","kind":"exercise","planned":true,"acquired":false,"shares":51560,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on October 30, 2025."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"The shares underlying this stock option shall vest in sixteen (16) equal quarterly installments after January 10, 2025, subject to the reporting person's continued service with the Issuer through each vesting date."}],"balance_after":223440,"derivative":{"exercise_price":4.45,"expiration_date":"2035-01-09","underlying":"Common Stock","underlying_shares":51560},"source":{"system":"sec-edgar","filing":"0001193125-26-281061","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1818261/000119312526281061/ownership.xml","form_type":"4"}},{"id":727779,"issuer":{"id":4044,"kind":"organization","name":"Relay Therapeutics, Inc.","symbol":"RLAY"},"owners":[{"id":22284,"kind":"person","name":"Catinazzo Thomas","position":1,"cik":"0001818261","reported_name":"Catinazzo Thomas","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Stock Option (Right to Buy)","published_at":"2026-06-24T20:09:57.000Z","date":"2026-06-22","kind":"exercise","planned":true,"acquired":false,"shares":61563,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on October 30, 2025."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"On March 2, 2020, the reporting person was granted an option to purchase 63,363 shares of common stock, subject to determination by the Board of Directors of the Issuer (the \"Board\") that the Issuer met, in whole or in part, certain milestones (the \"2020 Option Grant Criteria\"). On June 23, 2020, the Board determined that the 2020 Option Grant Criteria related to 25% of the option had been achieved, and the shares underlying 25% of this option, or 15,841 shares, commenced vesting in sixteen (16) equal quarterly installments following September 23, 2020. On December 11, 2020, the Board determined that the 2020 Option Grant Criteria related to the remaining 75% of the option had been achieved. 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The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer or a security holder of the Issuer, full information regarding the number of shares sold at each respective price within the range set forth in this footnote."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 9,807 shares underlying restricted stock units."}],"balance_after":177461,"source":{"system":"sec-edgar","filing":"0001193125-26-281061","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1818261/000119312526281061/ownership.xml","form_type":"4"}},{"id":727776,"issuer":{"id":4044,"kind":"organization","name":"Relay Therapeutics, Inc.","symbol":"RLAY"},"owners":[{"id":22284,"kind":"person","name":"Catinazzo Thomas","position":1,"cik":"0001818261","reported_name":"Catinazzo Thomas","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2026-06-24T20:09:57.000Z","date":"2026-06-22","kind":"exercise","planned":true,"acquired":true,"shares":51560,"price":4.45,"value":229442.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on October 30, 2025."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 9,807 shares underlying restricted stock units."}],"balance_after":229021,"source":{"system":"sec-edgar","filing":"0001193125-26-281061","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1818261/000119312526281061/ownership.xml","form_type":"4"}},{"id":727775,"issuer":{"id":4044,"kind":"organization","name":"Relay Therapeutics, Inc.","symbol":"RLAY"},"owners":[{"id":22284,"kind":"person","name":"Catinazzo Thomas","position":1,"cik":"0001818261","reported_name":"Catinazzo Thomas","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2026-06-24T20:09:57.000Z","date":"2026-06-22","kind":"sale","planned":true,"acquired":false,"shares":61563,"price":16.97,"value":1044724.11,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on October 30, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"This transaction was executed in multiple trades at prices ranging from $16.15 to $17.39. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer or a security holder of the Issuer, full information regarding the number of shares sold at each respective price within the range set forth in this footnote."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 9,807 shares underlying restricted stock units."}],"balance_after":177461,"source":{"system":"sec-edgar","filing":"0001193125-26-281061","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1818261/000119312526281061/ownership.xml","form_type":"4"}},{"id":727774,"issuer":{"id":4044,"kind":"organization","name":"Relay Therapeutics, Inc.","symbol":"RLAY"},"owners":[{"id":22284,"kind":"person","name":"Catinazzo Thomas","position":1,"cik":"0001818261","reported_name":"Catinazzo Thomas","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2026-06-24T20:09:57.000Z","date":"2026-06-22","kind":"exercise","planned":true,"acquired":true,"shares":61563,"price":5.22,"value":321358.86,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on October 30, 2025."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 9,807 shares underlying restricted stock units."}],"balance_after":239024,"source":{"system":"sec-edgar","filing":"0001193125-26-281061","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1818261/000119312526281061/ownership.xml","form_type":"4"}},{"id":727773,"issuer":{"id":4044,"kind":"organization","name":"Relay Therapeutics, Inc.","symbol":"RLAY"},"owners":[{"id":22284,"kind":"person","name":"Catinazzo Thomas","position":1,"cik":"0001818261","reported_name":"Catinazzo Thomas","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2026-06-24T20:09:57.000Z","date":"2026-06-22","kind":"sale","planned":true,"acquired":false,"shares":56323,"price":16.97,"value":955801.31,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on October 30, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"This transaction was executed in multiple trades at prices ranging from $16.15 to $17.39. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer or a security holder of the Issuer, full information regarding the number of shares sold at each respective price within the range set forth in this footnote."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 9,807 shares underlying restricted stock units."}],"balance_after":177461,"source":{"system":"sec-edgar","filing":"0001193125-26-281061","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1818261/000119312526281061/ownership.xml","form_type":"4"}},{"id":727772,"issuer":{"id":4044,"kind":"organization","name":"Relay Therapeutics, Inc.","symbol":"RLAY"},"owners":[{"id":22284,"kind":"person","name":"Catinazzo Thomas","position":1,"cik":"0001818261","reported_name":"Catinazzo Thomas","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2026-06-24T20:09:57.000Z","date":"2026-06-22","kind":"exercise","planned":true,"acquired":true,"shares":56323,"price":5.04,"value":283867.92,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on October 30, 2025."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 9,807 shares underlying restricted stock units."}],"balance_after":233784,"source":{"system":"sec-edgar","filing":"0001193125-26-281061","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1818261/000119312526281061/ownership.xml","form_type":"4"}},{"id":727771,"issuer":{"id":4044,"kind":"organization","name":"Relay Therapeutics, Inc.","symbol":"RLAY"},"owners":[{"id":22284,"kind":"person","name":"Catinazzo Thomas","position":1,"cik":"0001818261","reported_name":"Catinazzo Thomas","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2026-06-24T20:09:57.000Z","date":"2026-06-22","kind":"sale","planned":true,"acquired":false,"shares":17717,"price":17.01,"value":301366.17,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on October 30, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $16.38 to $17.28. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer or a security holder of the Issuer, full information regarding the number of shares sold at each respective price within the range set forth in this footnote."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 9,807 shares underlying restricted stock units."}],"balance_after":177461,"source":{"system":"sec-edgar","filing":"0001193125-26-281061","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1818261/000119312526281061/ownership.xml","form_type":"4"}},{"id":779355,"issuer":{"id":4044,"kind":"organization","name":"Relay Therapeutics, Inc.","symbol":"RLAY"},"owners":[{"id":22284,"kind":"person","name":"Catinazzo Thomas","position":1,"cik":"0001818261","reported_name":"Catinazzo Thomas","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2026-05-14T22:44:36.000Z","date":"2026-05-14","kind":"sale","planned":true,"acquired":false,"shares":17717,"price":12.86,"value":227840.62,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on October 30, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $12.67 to $13.42. The price reported above reflects the weighted average sale price. 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