{"transactions":[{"id":4624569,"issuer":{"id":5797,"kind":"organization","name":"SUTRO BIOPHARMA, INC.","symbol":"STRO"},"owners":[{"id":63403,"kind":"person","name":"Gerber Hans-Peter","position":1,"cik":"0001992979","reported_name":"Gerber Hans-Peter","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF SCIENTIFIC OFFICER"}}],"security":"Restricted Stock Units (RSUs)","published_at":"2026-09-22T20:09:25.000Z","date":"2026-09-18","kind":"exercise","planned":false,"acquired":false,"shares":3750,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Each RSU represents a contingent right to receive one (1) share of the Issuer's Common Stock upon settlement."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The RSUs vested or vest as to 1/4 of the total award annually, with the first tranche vested on September 18, 2024, subject to the reporting person's continued service through each vesting date."}],"balance_after":3750,"derivative":{"expiration_date":"2027-09-18","underlying":"Common Stock","underlying_shares":3750},"source":{"system":"sec-edgar","filing":"0001992979-26-000004","document":"form4-09222026_080918.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1992979/000199297926000004/form4-09222026_080918.xml","form_type":"4"}},{"id":4624568,"issuer":{"id":5797,"kind":"organization","name":"SUTRO BIOPHARMA, INC.","symbol":"STRO"},"owners":[{"id":63403,"kind":"person","name":"Gerber Hans-Peter","position":1,"cik":"0001992979","reported_name":"Gerber Hans-Peter","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF SCIENTIFIC OFFICER"}}],"security":"Common Stock","published_at":"2026-09-22T20:09:25.000Z","date":"2026-09-18","kind":"tax_withholding","planned":false,"acquired":false,"shares":1345,"price":15.34,"value":20632.3,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Represents the number of shares of Common Stock that have been withheld by the Issuer to satisfy its income tax withholding and remittance obligations in connection with the net settlement of restricted stock units; does not represent a sale by the reporting person."}],"balance_after":12367,"source":{"system":"sec-edgar","filing":"0001992979-26-000004","document":"form4-09222026_080918.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1992979/000199297926000004/form4-09222026_080918.xml","form_type":"4"}},{"id":4624567,"issuer":{"id":5797,"kind":"organization","name":"SUTRO BIOPHARMA, INC.","symbol":"STRO"},"owners":[{"id":63403,"kind":"person","name":"Gerber Hans-Peter","position":1,"cik":"0001992979","reported_name":"Gerber Hans-Peter","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF SCIENTIFIC OFFICER"}}],"security":"Common Stock","published_at":"2026-09-22T20:09:25.000Z","date":"2026-09-18","kind":"exercise","planned":false,"acquired":true,"shares":3750,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"The reported total includes 444 shares of Common Stock acquired by the reporting person in one or more transactions with the Issuer pursuant to its Employee Stock Purchase Plan, which transactions are exempt pursuant to Rules 16a3(f)(1)(i)(B) and 16b3(c)."}],"balance_after":13712,"source":{"system":"sec-edgar","filing":"0001992979-26-000004","document":"form4-09222026_080918.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1992979/000199297926000004/form4-09222026_080918.xml","form_type":"4"}},{"id":868513,"issuer":{"id":5797,"kind":"organization","name":"SUTRO BIOPHARMA, INC.","symbol":"STRO"},"owners":[{"id":63403,"kind":"person","name":"Gerber Hans-Peter","position":1,"cik":"0001992979","reported_name":"Gerber Hans-Peter","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF SCIENTIFIC OFFICER"}}],"security":"Stock Option (right to buy)","published_at":"2026-03-03T18:56:49.000Z","date":"2026-03-02","kind":"grant","planned":false,"acquired":true,"shares":40000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"1/48 of the total option award shall vest monthly, subject to the reporting person's continued service through each vesting date, with the first tranche vesting on April 1, 2026."}],"balance_after":40000,"derivative":{"exercise_price":20.55,"expiration_date":"2036-03-02","underlying":"Common Stock","underlying_shares":40000},"source":{"system":"sec-edgar","filing":"0001992979-26-000002","document":"form4-03032026_110346.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1992979/000199297926000002/form4-03032026_110346.xml","form_type":"4"}},{"id":868512,"issuer":{"id":5797,"kind":"organization","name":"SUTRO BIOPHARMA, INC.","symbol":"STRO"},"owners":[{"id":63403,"kind":"person","name":"Gerber Hans-Peter","position":1,"cik":"0001992979","reported_name":"Gerber Hans-Peter","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF SCIENTIFIC OFFICER"}}],"security":"Restricted Stock Units (RSUs)","published_at":"2026-03-03T18:56:49.000Z","date":"2026-03-02","kind":"grant","planned":false,"acquired":true,"shares":5000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each RSU represents a contingent right to receive one (1) share of the Issuer's Common Stock upon settlement."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"The RSUs shall vest as to 1/4 of the total award annually, with the first tranche vesting on March 1, 2027, subject to continued service through each vesting date."}],"balance_after":5000,"derivative":{"expiration_date":"2030-03-01","underlying":"Common Stock","underlying_shares":5000},"source":{"system":"sec-edgar","filing":"0001992979-26-000002","document":"form4-03032026_110346.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1992979/000199297926000002/form4-03032026_110346.xml","form_type":"4"}},{"id":868511,"issuer":{"id":5797,"kind":"organization","name":"SUTRO BIOPHARMA, INC.","symbol":"STRO"},"owners":[{"id":63403,"kind":"person","name":"Gerber Hans-Peter","position":1,"cik":"0001992979","reported_name":"Gerber Hans-Peter","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF SCIENTIFIC OFFICER"}}],"security":"Restricted Stock Units (RSUs)","published_at":"2026-03-03T18:56:49.000Z","date":"2026-03-02","kind":"exercise","planned":false,"acquired":false,"shares":2843,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each RSU represents a contingent right to receive one (1) share of the Issuer's Common Stock upon settlement."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The RSUs vested or vest as to 1/4 of the total award annually, with the first tranche vested on March 2, 2026, subject to continued service through each vesting date."}],"balance_after":8532,"derivative":{"expiration_date":"2029-03-02","underlying":"Common Stock","underlying_shares":2843},"source":{"system":"sec-edgar","filing":"0001992979-26-000002","document":"form4-03032026_110346.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1992979/000199297926000002/form4-03032026_110346.xml","form_type":"4"}},{"id":868510,"issuer":{"id":5797,"kind":"organization","name":"SUTRO BIOPHARMA, INC.","symbol":"STRO"},"owners":[{"id":63403,"kind":"person","name":"Gerber Hans-Peter","position":1,"cik":"0001992979","reported_name":"Gerber Hans-Peter","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF SCIENTIFIC OFFICER"}}],"security":"Restricted Stock Units (RSUs)","published_at":"2026-03-03T18:56:49.000Z","date":"2026-03-01","kind":"exercise","planned":false,"acquired":false,"shares":1125,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each RSU represents a contingent right to receive one (1) share of the Issuer's Common Stock upon settlement."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The RSUs vested or vest as to 1/4 of the total award annually, with the first tranche vested on March 1, 2025, subject to continued service through each vesting date."}],"balance_after":2250,"derivative":{"expiration_date":"2028-03-01","underlying":"Common Stock","underlying_shares":1125},"source":{"system":"sec-edgar","filing":"0001992979-26-000002","document":"form4-03032026_110346.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1992979/000199297926000002/form4-03032026_110346.xml","form_type":"4"}},{"id":868509,"issuer":{"id":5797,"kind":"organization","name":"SUTRO BIOPHARMA, INC.","symbol":"STRO"},"owners":[{"id":63403,"kind":"person","name":"Gerber Hans-Peter","position":1,"cik":"0001992979","reported_name":"Gerber Hans-Peter","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF SCIENTIFIC OFFICER"}}],"security":"Common Stock","published_at":"2026-03-03T18:56:49.000Z","date":"2026-03-02","kind":"tax_withholding","planned":false,"acquired":false,"shares":1170,"price":20.55,"value":24043.5,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents the number of shares of Common Stock that have been withheld by the Issuer to satisfy its income tax withholding and remittance obligations in connection with the net settlement of restricted stock units; does not represent a sale by the reporting person."}],"balance_after":9518,"source":{"system":"sec-edgar","filing":"0001992979-26-000002","document":"form4-03032026_110346.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1992979/000199297926000002/form4-03032026_110346.xml","form_type":"4"}},{"id":868508,"issuer":{"id":5797,"kind":"organization","name":"SUTRO BIOPHARMA, INC.","symbol":"STRO"},"owners":[{"id":63403,"kind":"person","name":"Gerber Hans-Peter","position":1,"cik":"0001992979","reported_name":"Gerber Hans-Peter","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF SCIENTIFIC OFFICER"}}],"security":"Common Stock","published_at":"2026-03-03T18:56:49.000Z","date":"2026-03-02","kind":"exercise","planned":false,"acquired":true,"shares":2843,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":10688,"source":{"system":"sec-edgar","filing":"0001992979-26-000002","document":"form4-03032026_110346.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1992979/000199297926000002/form4-03032026_110346.xml","form_type":"4"}},{"id":868507,"issuer":{"id":5797,"kind":"organization","name":"SUTRO BIOPHARMA, INC.","symbol":"STRO"},"owners":[{"id":63403,"kind":"person","name":"Gerber Hans-Peter","position":1,"cik":"0001992979","reported_name":"Gerber Hans-Peter","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF SCIENTIFIC OFFICER"}}],"security":"Common Stock","published_at":"2026-03-03T18:56:49.000Z","date":"2026-03-01","kind":"tax_withholding","planned":false,"acquired":false,"shares":463,"price":20.47,"value":9477.61,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents the number of shares of Common Stock that have been withheld by the Issuer to satisfy its income tax withholding and remittance obligations in connection with the net settlement of restricted stock units; does not represent a sale by the reporting person."}],"balance_after":7845,"source":{"system":"sec-edgar","filing":"0001992979-26-000002","document":"form4-03032026_110346.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1992979/000199297926000002/form4-03032026_110346.xml","form_type":"4"}},{"id":868506,"issuer":{"id":5797,"kind":"organization","name":"SUTRO BIOPHARMA, INC.","symbol":"STRO"},"owners":[{"id":63403,"kind":"person","name":"Gerber Hans-Peter","position":1,"cik":"0001992979","reported_name":"Gerber Hans-Peter","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF SCIENTIFIC OFFICER"}}],"security":"Common Stock","published_at":"2026-03-03T18:56:49.000Z","date":"2026-03-01","kind":"exercise","planned":false,"acquired":true,"shares":1125,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":8308,"source":{"system":"sec-edgar","filing":"0001992979-26-000002","document":"form4-03032026_110346.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1992979/000199297926000002/form4-03032026_110346.xml","form_type":"4"}},{"id":958364,"issuer":{"id":5797,"kind":"organization","name":"SUTRO BIOPHARMA, INC.","symbol":"STRO"},"owners":[{"id":63403,"kind":"person","name":"Gerber Hans-Peter","position":1,"cik":"0001992979","reported_name":"Gerber Hans-Peter","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF SCIENTIFIC OFFICER"}}],"security":"Stock Option (right to buy)","published_at":"2025-12-29T16:49:28.000Z","date":"2025-12-23","kind":"grant","planned":false,"acquired":true,"shares":7925,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"1/48 of the total option award shall vest monthly, subject to the reporting person's continued service to the issuer on each vesting date, with the first tranche vesting on January 23, 2026."}],"balance_after":7925,"derivative":{"exercise_price":10.38,"expiration_date":"2035-12-23","underlying":"Common Stock","underlying_shares":7925},"source":{"system":"sec-edgar","filing":"0001992979-25-000006","document":"form4-12292025_091224.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1992979/000199297925000006/form4-12292025_091224.xml","form_type":"4"}},{"id":1017700,"issuer":{"id":5797,"kind":"organization","name":"SUTRO BIOPHARMA, INC.","symbol":"STRO"},"owners":[{"id":63403,"kind":"person","name":"Gerber Hans-Peter","position":1,"cik":"0001992979","reported_name":"Gerber Hans-Peter","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF SCIENTIFIC OFFICER"}}],"security":"Common Stock","published_at":"2025-10-16T08:19:45.000Z","date":"2025-10-15","kind":"purchase","planned":false,"acquired":true,"shares":17000,"price":0.8004,"value":13606.8,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $0.7932 to $0.8015, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote."}],"balance_after":71832,"source":{"system":"sec-edgar","filing":"0001992979-25-000004","document":"form4-10162025_121041.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1992979/000199297925000004/form4-10162025_121041.xml","form_type":"4"}},{"id":1034827,"issuer":{"id":5797,"kind":"organization","name":"SUTRO BIOPHARMA, INC.","symbol":"STRO"},"owners":[{"id":63403,"kind":"person","name":"Gerber Hans-Peter","position":1,"cik":"0001992979","reported_name":"Gerber Hans-Peter","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF SCIENTIFIC OFFICER"}}],"security":"Restricted Stock Units (RSUs)","published_at":"2025-09-22T17:01:41.000Z","date":"2025-09-18","kind":"exercise","planned":false,"acquired":false,"shares":37500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each RSU represents a contingent right to receive one (1) share of the Issuer's Common Stock upon settlement."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The RSU award vests annually as to 1/4th of the total award beginning on September 18, 2024, subject to the reporting person's continued service to the Issuer on each vesting date."}],"balance_after":75000,"derivative":{"expiration_date":"2027-09-18","underlying":"Common Stock","underlying_shares":37500},"source":{"system":"sec-edgar","filing":"0001992979-25-000003","document":"form4-09222025_090937.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1992979/000199297925000003/form4-09222025_090937.xml","form_type":"4"}},{"id":1034826,"issuer":{"id":5797,"kind":"organization","name":"SUTRO BIOPHARMA, INC.","symbol":"STRO"},"owners":[{"id":63403,"kind":"person","name":"Gerber Hans-Peter","position":1,"cik":"0001992979","reported_name":"Gerber Hans-Peter","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF SCIENTIFIC OFFICER"}}],"security":"Common Stock","published_at":"2025-09-22T17:01:41.000Z","date":"2025-09-18","kind":"tax_withholding","planned":false,"acquired":false,"shares":13417,"price":0.9,"value":12075.3,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents the number of shares of Common Stock that have been withheld by the issuer to satisfy its income tax withholding and remittance obligations in connection with the net settlement of restricted stock units; does not represent a sale by the reporting person."}],"balance_after":54832,"source":{"system":"sec-edgar","filing":"0001992979-25-000003","document":"form4-09222025_090937.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1992979/000199297925000003/form4-09222025_090937.xml","form_type":"4"}},{"id":1034825,"issuer":{"id":5797,"kind":"organization","name":"SUTRO BIOPHARMA, INC.","symbol":"STRO"},"owners":[{"id":63403,"kind":"person","name":"Gerber Hans-Peter","position":1,"cik":"0001992979","reported_name":"Gerber Hans-Peter","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF SCIENTIFIC OFFICER"}}],"security":"Common Stock","published_at":"2025-09-22T17:01:41.000Z","date":"2025-09-18","kind":"exercise","planned":false,"acquired":true,"shares":37500,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":68249,"source":{"system":"sec-edgar","filing":"0001992979-25-000003","document":"form4-09222025_090937.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1992979/000199297925000003/form4-09222025_090937.xml","form_type":"4"}},{"id":1175776,"issuer":{"id":5797,"kind":"organization","name":"SUTRO BIOPHARMA, INC.","symbol":"STRO"},"owners":[{"id":63403,"kind":"person","name":"Gerber Hans-Peter","position":1,"cik":"0001992979","reported_name":"Gerber Hans-Peter","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF SCIENTIFIC OFFICER"}}],"security":"Restricted Stock Units (RSUs)","published_at":"2025-04-08T16:11:01.000Z","date":"2025-04-04","kind":"grant","planned":false,"acquired":true,"shares":113750,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each RSU represents a contingent right to receive one (1) share of the Issuer's Common Stock upon settlement."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The RSUs vest as to 1/4th of the total award annually beginning on March 2, 2026, subject to the reporting person's provision of service to the issuer on each vesting date."}],"balance_after":113750,"derivative":{"expiration_date":"2029-03-02","underlying":"Common Stock","underlying_shares":113750},"source":{"system":"sec-edgar","filing":"0001415889-25-010384","document":"form4-04082025_080457.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1992979/000141588925010384/form4-04082025_080457.xml","form_type":"4"}},{"id":1175775,"issuer":{"id":5797,"kind":"organization","name":"SUTRO BIOPHARMA, INC.","symbol":"STRO"},"owners":[{"id":63403,"kind":"person","name":"Gerber Hans-Peter","position":1,"cik":"0001992979","reported_name":"Gerber Hans-Peter","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF SCIENTIFIC OFFICER"}}],"security":"Stock Option (Right to Buy)","published_at":"2025-04-08T16:11:01.000Z","date":"2025-04-04","kind":"grant","planned":false,"acquired":true,"shares":122500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The option vests as to 2.0833% of the total award monthly, beginning on May 4, 2025, with 100% of the award being vested and exercisable on April 4, 2029, subject to the reporting person's provision of service to the issuer on each vesting date."}],"balance_after":122500,"derivative":{"exercise_price":0.55,"expiration_date":"2035-04-04","underlying":"Common Stock","underlying_shares":122500},"source":{"system":"sec-edgar","filing":"0001415889-25-010384","document":"form4-04082025_080457.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1992979/000141588925010384/form4-04082025_080457.xml","form_type":"4"}},{"id":1229763,"issuer":{"id":5797,"kind":"organization","name":"SUTRO BIOPHARMA, INC.","symbol":"STRO"},"owners":[{"id":63403,"kind":"person","name":"Gerber Hans-Peter","position":1,"cik":"0001992979","reported_name":"Gerber Hans-Peter","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF SCIENTIFIC OFFICER"}}],"security":"Restricted Stock Units (RSUs)","published_at":"2025-03-04T18:34:34.000Z","date":"2025-03-01","kind":"exercise","planned":false,"acquired":false,"shares":11250,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each RSU represents a contingent right to receive one (1) share of the Issuer's Common Stock upon settlement."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The RSUs vest as to 1/4th of the total award annually beginning on March 1, 2025, subject to continued service through each vesting date."}],"balance_after":33750,"derivative":{"expiration_date":"2028-03-01","underlying":"Common Stock","underlying_shares":11250},"source":{"system":"sec-edgar","filing":"0001415889-25-006696","document":"form4-03042025_110331.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1992979/000141588925006696/form4-03042025_110331.xml","form_type":"4"}},{"id":1229762,"issuer":{"id":5797,"kind":"organization","name":"SUTRO BIOPHARMA, INC.","symbol":"STRO"},"owners":[{"id":63403,"kind":"person","name":"Gerber Hans-Peter","position":1,"cik":"0001992979","reported_name":"Gerber Hans-Peter","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF SCIENTIFIC OFFICER"}}],"security":"Common Stock","published_at":"2025-03-04T18:34:34.000Z","date":"2025-03-01","kind":"tax_withholding","planned":false,"acquired":false,"shares":4621,"price":1.59,"value":7347.39,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents the number of shares of Common Stock that have been withheld by the issuer to satisfy its income tax withholding and remittance obligations in connection with the net settlement of restricted stock units; does not represent a sale by the reporting person."}],"balance_after":30749,"source":{"system":"sec-edgar","filing":"0001415889-25-006696","document":"form4-03042025_110331.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1992979/000141588925006696/form4-03042025_110331.xml","form_type":"4"}},{"id":1229761,"issuer":{"id":5797,"kind":"organization","name":"SUTRO BIOPHARMA, INC.","symbol":"STRO"},"owners":[{"id":63403,"kind":"person","name":"Gerber Hans-Peter","position":1,"cik":"0001992979","reported_name":"Gerber Hans-Peter","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF SCIENTIFIC OFFICER"}}],"security":"Common Stock","published_at":"2025-03-04T18:34:34.000Z","date":"2025-03-01","kind":"exercise","planned":false,"acquired":true,"shares":11250,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":35370,"source":{"system":"sec-edgar","filing":"0001415889-25-006696","document":"form4-03042025_110331.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1992979/000141588925006696/form4-03042025_110331.xml","form_type":"4"}},{"id":1401746,"issuer":{"id":5797,"kind":"organization","name":"SUTRO BIOPHARMA, INC.","symbol":"STRO"},"owners":[{"id":63403,"kind":"person","name":"Gerber Hans-Peter","position":1,"cik":"0001992979","reported_name":"Gerber Hans-Peter","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF SCIENTIFIC OFFICER"}}],"security":"Restricted Stock Units (RSUs)","published_at":"2024-09-20T16:09:47.000Z","date":"2024-09-18","kind":"exercise","planned":false,"acquired":false,"shares":37500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each RSU represents a contingent right to receive one (1) share of the Issuer's Common Stock upon settlement."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The RSU award vests annually as to 1/4th of the total award beginning on September 18, 2024, subject to the reporting person's continued service to the Issuer on each vesting date."}],"balance_after":112500,"derivative":{"expiration_date":"2027-09-18","underlying":"Common Stock","underlying_shares":37500},"source":{"system":"sec-edgar","filing":"0001415889-24-023745","document":"form4-09202024_080944.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1992979/000141588924023745/form4-09202024_080944.xml","form_type":"4"}},{"id":1401745,"issuer":{"id":5797,"kind":"organization","name":"SUTRO BIOPHARMA, INC.","symbol":"STRO"},"owners":[{"id":63403,"kind":"person","name":"Gerber Hans-Peter","position":1,"cik":"0001992979","reported_name":"Gerber Hans-Peter","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF SCIENTIFIC OFFICER"}}],"security":"Common Stock","published_at":"2024-09-20T16:09:47.000Z","date":"2024-09-18","kind":"tax_withholding","planned":false,"acquired":false,"shares":13380,"price":3.95,"value":52851.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents the number of shares of Common Stock that have been withheld by the issuer to satisfy its income tax withholding and remittance obligations in connection with the net settlement of restricted stock units; does not represent a sale by the reporting person."}],"balance_after":24120,"source":{"system":"sec-edgar","filing":"0001415889-24-023745","document":"form4-09202024_080944.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1992979/000141588924023745/form4-09202024_080944.xml","form_type":"4"}},{"id":1401744,"issuer":{"id":5797,"kind":"organization","name":"SUTRO BIOPHARMA, INC.","symbol":"STRO"},"owners":[{"id":63403,"kind":"person","name":"Gerber Hans-Peter","position":1,"cik":"0001992979","reported_name":"Gerber Hans-Peter","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF SCIENTIFIC OFFICER"}}],"security":"Common Stock","published_at":"2024-09-20T16:09:47.000Z","date":"2024-09-18","kind":"exercise","planned":false,"acquired":true,"shares":37500,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":37500,"source":{"system":"sec-edgar","filing":"0001415889-24-023745","document":"form4-09202024_080944.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1992979/000141588924023745/form4-09202024_080944.xml","form_type":"4"}},{"id":1589490,"issuer":{"id":5797,"kind":"organization","name":"SUTRO BIOPHARMA, INC.","symbol":"STRO"},"owners":[{"id":63403,"kind":"person","name":"Gerber Hans-Peter","position":1,"cik":"0001992979","reported_name":"Gerber Hans-Peter","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF SCIENTIFIC OFFICER"}}],"security":"Restricted Stock Units (RSUs)","published_at":"2024-03-07T16:28:40.000Z","date":"2024-03-05","kind":"grant","planned":false,"acquired":true,"shares":45000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each RSU represents a contingent right to receive one (1) share of the Issuer's Common Stock upon settlement."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The RSUs vest as to 1/4th of the total award annually beginning on March 1, 2025, subject to continued service through each vesting date."}],"balance_after":45000,"derivative":{"expiration_date":"2028-03-01","underlying":"Common Stock","underlying_shares":45000},"source":{"system":"sec-edgar","filing":"0001415889-24-007184","document":"form4-03072024_090326.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1992979/000141588924007184/form4-03072024_090326.xml","form_type":"4"}},{"id":1589489,"issuer":{"id":5797,"kind":"organization","name":"SUTRO BIOPHARMA, INC.","symbol":"STRO"},"owners":[{"id":63403,"kind":"person","name":"Gerber Hans-Peter","position":1,"cik":"0001992979","reported_name":"Gerber Hans-Peter","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF SCIENTIFIC OFFICER"}}],"security":"Stock Option (Right to Buy Common Stock)","published_at":"2024-03-07T16:28:40.000Z","date":"2024-03-05","kind":"grant","planned":false,"acquired":true,"shares":60000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The option vests as to 2.0833% of the total award monthly, beginning on April 1, 2024, with 100% of the award being vested and exercisable on March 1, 2028, subject to the reporting person's continued service to the Issuer on each vesting date."}],"balance_after":60000,"derivative":{"exercise_price":4.54,"expiration_date":"2034-03-05","underlying":"Common Stock","underlying_shares":60000},"source":{"system":"sec-edgar","filing":"0001415889-24-007184","document":"form4-03072024_090326.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1992979/000141588924007184/form4-03072024_090326.xml","form_type":"4"}},{"id":1777764,"issuer":{"id":5797,"kind":"organization","name":"SUTRO BIOPHARMA, INC.","symbol":"STRO"},"owners":[{"id":63403,"kind":"person","name":"Gerber Hans-Peter","position":1,"cik":"0001992979","reported_name":"Gerber Hans-Peter","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Restricted Stock Unit (RSU)","published_at":"2023-09-19T16:19:27.000Z","date":"2023-09-18","kind":"grant","planned":false,"acquired":true,"shares":150000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each RSU represents a contingent right to receive one (1) share of the Issuer's Common Stock upon settlement."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The RSU award vests annually as to 1/4th of the total award beginning on September 18, 2024, subject to the reporting person's continued service to the Issuer on each vesting date."}],"balance_after":150000,"derivative":{"expiration_date":"2027-09-18","underlying":"Common Stock","underlying_shares":150000},"source":{"system":"sec-edgar","filing":"0001209191-23-049943","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1992979/000120919123049943/doc4.xml","form_type":"4"}},{"id":1777763,"issuer":{"id":5797,"kind":"organization","name":"SUTRO BIOPHARMA, INC.","symbol":"STRO"},"owners":[{"id":63403,"kind":"person","name":"Gerber Hans-Peter","position":1,"cik":"0001992979","reported_name":"Gerber Hans-Peter","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Stock Option (right to buy)","published_at":"2023-09-19T16:19:27.000Z","date":"2023-09-18","kind":"grant","planned":false,"acquired":true,"shares":175000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"25% of the option award vests on September 18, 2024.  The remainder vests ratably as to 1/48th of the total award monthly thereafter, subject to the reporting person's continued service to the Issuer on each vesting date."}],"balance_after":175000,"derivative":{"exercise_price":3.77,"expiration_date":"2033-09-18","underlying":"Common Stock","underlying_shares":175000},"source":{"system":"sec-edgar","filing":"0001209191-23-049943","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1992979/000120919123049943/doc4.xml","form_type":"4"}}]}