{"transactions":[{"id":686631,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":23290,"kind":"person","name":"New Enterprise Associates 14, L.P.","position":1,"cik":"0001544328","reported_name":"New Enterprise Associates 14, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23291,"kind":"person","name":"NEA Partners 14, L.P.","position":2,"cik":"0001551531","reported_name":"NEA Partners 14, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23292,"kind":"person","name":"NEA 14 GP, LTD","position":3,"cik":"0001551532","reported_name":"NEA 14 GP, LTD","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23293,"kind":"person","name":"Florence Anthony A. Jr.","position":4,"cik":"0001559827","reported_name":"Florence Anthony A. 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The amendment is reported above as the cancellation of the old warrant and the acquisition of a new one."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The warrants were immediately exercisable; provided, however, that the warrants carry a limitation on exercise preventing exercise if such exercise results in New Enterprise Associates 14, L.P. (\"NEA 14\") beneficially owning in excess of 4.99% (or, at the election of NEA 14, 9.99%) of the number of shares of the Issuer's Common Stock, which percentage can be increased or decreased at the option of NEA 14 upon 61 days' prior notice."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"The securities are directly held by NEA 14 and are indirectly held by NEA Partners 14, L.P. (\"NEA Partners 14\"), the sole general partner of NEA 14, NEA 14 GP, LTD (\"NEA 14 LTD\"), the sole general partner of NEA Partners 14, and the members of the Executive Committee (the \"Executive Committee\") of NEA Management Company, LLC (NEA Partners 14, NEA 14 LTD and the members of the Executive Committee together, the \"Indirect Reporting Persons\"). The members of the Executive Committee are Anthony A. Florence, Jr., Mohamad H. Makhzoumi, and Scott D. Sandell. The Indirect Reporting Persons disclaim beneficial ownership within the meaning of Section 16 of the Securities Exchange Act of 1934, as amended, or otherwise of such portion of the securities held by NEA 14 in which the Indirect Reporting Persons have no pecuniary interest."}],"balance_after":2640845,"derivative":{"exercise_price":0.7,"expiration_date":"2028-10-03","underlying":"Common Stock","underlying_shares":2640845},"source":{"system":"sec-edgar","filing":"0001193125-26-352228","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1237289/000119312526352228/ownership.xml","form_type":"4"}},{"id":686630,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":23290,"kind":"person","name":"New Enterprise Associates 14, L.P.","position":1,"cik":"0001544328","reported_name":"New Enterprise Associates 14, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23291,"kind":"person","name":"NEA Partners 14, L.P.","position":2,"cik":"0001551531","reported_name":"NEA Partners 14, L.P.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23292,"kind":"person","name":"NEA 14 GP, LTD","position":3,"cik":"0001551532","reported_name":"NEA 14 GP, LTD","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":23293,"kind":"person","name":"Florence Anthony A. 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The amendment is reported above as the cancellation of the old warrant and the acquisition of a new one."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The warrants were immediately exercisable; provided, however, that the warrants carry a limitation on exercise preventing exercise if such exercise results in New Enterprise Associates 14, L.P. (\"NEA 14\") beneficially owning in excess of 4.99% (or, at the election of NEA 14, 9.99%) of the number of shares of the Issuer's Common Stock, which percentage can be increased or decreased at the option of NEA 14 upon 61 days' prior notice."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"The securities are directly held by NEA 14 and are indirectly held by NEA Partners 14, L.P. (\"NEA Partners 14\"), the sole general partner of NEA 14, NEA 14 GP, LTD (\"NEA 14 LTD\"), the sole general partner of NEA Partners 14, and the members of the Executive Committee (the \"Executive Committee\") of NEA Management Company, LLC (NEA Partners 14, NEA 14 LTD and the members of the Executive Committee together, the \"Indirect Reporting Persons\"). The members of the Executive Committee are Anthony A. Florence, Jr., Mohamad H. Makhzoumi, and Scott D. Sandell. The Indirect Reporting Persons disclaim beneficial ownership within the meaning of Section 16 of the Securities Exchange Act of 1934, as amended, or otherwise of such portion of the securities held by NEA 14 in which the Indirect Reporting Persons have no pecuniary interest."}],"balance_after":0,"derivative":{"exercise_price":3.408,"expiration_date":"2028-10-03","underlying":"Common Stock","underlying_shares":2640845},"source":{"system":"sec-edgar","filing":"0001193125-26-352228","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1237289/000119312526352228/ownership.xml","form_type":"4"}},{"id":1010798,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":73741,"kind":"person","name":"Dooley Mary Beth","position":1,"cik":"0002015112","reported_name":"Dooley Mary Beth","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks below"}}],"security":"Common Stock","published_at":"2025-10-31T15:30:03.000Z","date":"2025-10-29","kind":"sale","planned":false,"acquired":false,"shares":157,"price":1.81,"value":284.17,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents the number of shares sold by the reporting person on October 29, 2025 to cover the tax liability in connection with the vesting of a restricted stock award, vesting on October 28, 2025, that was granted in 2022."}],"balance_after":12744,"source":{"system":"sec-edgar","filing":"0001193125-25-260649","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2015112/000119312525260649/ownership.xml","form_type":"4"}},{"id":1163770,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":35351,"kind":"person","name":"Flynn James P","position":1,"cik":"0001955965","reported_name":"Flynn James P","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-04-29T20:43:44.000Z","date":"2025-04-26","kind":"grant","planned":false,"acquired":true,"shares":15000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Per the Amended and Restated Non-Employee Director Compensation Program, amended on April 26, 2025, and the 2015 Equity Incentive Award Plan, the Board of Directors of Synlogic, Inc. awarded each Non-Employee Director 15,000 shares of restricted stock. The shares were granted on April 26, 2025 and will fully vest on December 15, 2025, subject to the Reporting Person continuing to provide services to the Company as a Non-Employee Director, through such vesting date."}],"balance_after":15000,"source":{"system":"sec-edgar","filing":"0000950170-25-060253","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1527599/000095017025060253/ownership.xml","form_type":"4"}},{"id":1163840,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":80393,"kind":"person","name":"Shea Richard P","position":1,"cik":"0001294354","reported_name":"Shea Richard P","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-04-29T16:46:11.000Z","date":"2025-04-26","kind":"grant","planned":false,"acquired":true,"shares":15000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Per the Amended and Restated Non-Employee Director Compensation Program, amended on April 26, 2025, and the 2015 Equity Incentive Award Plan, the Board of Directors of Synlogic, Inc. awarded each Non-Employee Director 15,000 shares of restricted stock. The shares were granted on April 26, 2025 and will fully vest on December 15, 2025, subject to the Reporting Person continuing to provide services to the Company as a Non-Employee Director, through such vesting date."}],"balance_after":15506,"source":{"system":"sec-edgar","filing":"0000950170-25-060267","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1294354/000095017025060267/ownership.xml","form_type":"4"}},{"id":1180234,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":73741,"kind":"person","name":"Dooley Mary Beth","position":1,"cik":"0002015112","reported_name":"Dooley Mary Beth","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks below"}}],"security":"Common 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each of the first three anniversaries of the Transaction Date, subject to the Reporting Person continuing to provide services to the Issuer through such vesting date."}],"balance_after":4000,"derivative":{"exercise_price":1.78,"expiration_date":"2034-03-19","underlying":"Common Stock","underlying_shares":4000},"source":{"system":"sec-edgar","filing":"0000950170-24-034866","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1527599/000095017024034866/ownership.xml","form_type":"4"}},{"id":1687064,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":95461,"kind":"person","name":"Hurter Patricia N.","position":1,"cik":"0001767191","reported_name":"Hurter Patricia N.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (right to 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Such options vest in quarterly installments on the last day of each calendar quarter during 2024 provided the Reporting Person coninues to provide services to the Issuer."}],"balance_after":14678,"derivative":{"exercise_price":4.47,"expiration_date":"2034-01-02","underlying":"Common Stock","underlying_shares":14678},"source":{"system":"sec-edgar","filing":"0000950170-24-001826","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1527599/000095017024001826/ownership.xml","form_type":"4"}},{"id":1687462,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":26196,"kind":"person","name":"Barrett Peter","position":1,"cik":"0001291895","reported_name":"Barrett Peter","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (right to buy)","published_at":"2024-01-04T21:00:20.000Z","date":"2024-01-02","kind":"grant","planned":false,"acquired":true,"shares":24923,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The options were issued to the Reporting Person pursuant to the Issuer's Amended and Restated Non-Employee Director Compensation Program and 2015 Equity Incentive Award Plan in lieu of the non-employee director board and committee cash retainers of $81,500 in the aggregate. Such options vest in four equal quarterly installments on the last day of each calendar quarter during 2024 provided the Reporting Person continues to provide services to the Issuer."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The reporting person is a member of Atlas Venture Associates IX, LLC (\"AVA IX LLC\") and is obligated to transfer the economic benefit, if any, received upon the sale of the shares issuable upon exercise of the equity grants to Atlas Venture Advisors, L.P. As such, the Reporting Person disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, except to the extent of his pecuniary interest therein, if any."}],"balance_after":24923,"derivative":{"exercise_price":4.47,"expiration_date":"2034-01-02","underlying":"Common Stock","underlying_shares":24923},"source":{"system":"sec-edgar","filing":"0000950170-24-001821","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1291895/000095017024001821/ownership.xml","form_type":"4"}},{"id":1741961,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":34400,"kind":"person","name":"Brennan Aoife","position":1,"cik":"0001714563","reported_name":"Brennan Aoife","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Stock Option (right to buy)","published_at":"2023-11-15T00:23:02.000Z","date":"2023-11-10","kind":"grant","planned":false,"acquired":true,"shares":8666,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"These performance-based stock options, granted on March 16, 2023, vest when the achievement of certain clinical and regulatory development milestones are met."}],"balance_after":8666,"derivative":{"exercise_price":1.85,"expiration_date":"2033-03-16","underlying":"Common Stock","underlying_shares":8666},"source":{"system":"sec-edgar","filing":"0000950170-23-063927","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":20,"url":"https://www.sec.gov/Archives/edgar/data/1527599/000095017023063927/ownership.xml","form_type":"4"}},{"id":1741960,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":34400,"kind":"person","name":"Brennan Aoife","position":1,"cik":"0001714563","reported_name":"Brennan Aoife","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Stock Option (right to buy)","published_at":"2023-11-15T00:23:02.000Z","date":"2023-11-10","kind":"grant","planned":false,"acquired":true,"shares":42999,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"The shares subject to this option vest in approximately equal monthly installments beginning on April 1, 2023 through April 1, 2027."}],"balance_after":42999,"derivative":{"exercise_price":1.85,"expiration_date":"2033-03-16","underlying":"Common Stock","underlying_shares":42999},"source":{"system":"sec-edgar","filing":"0000950170-23-063927","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":19,"url":"https://www.sec.gov/Archives/edgar/data/1527599/000095017023063927/ownership.xml","form_type":"4"}},{"id":1741959,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":34400,"kind":"person","name":"Brennan Aoife","position":1,"cik":"0001714563","reported_name":"Brennan Aoife","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Stock Option (right to buy)","published_at":"2023-11-15T00:23:02.000Z","date":"2023-11-10","kind":"grant","planned":false,"acquired":true,"shares":28943,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"The shares subject to this option vest in approximately equal monthly installments beginning on February 4, 2022 through February 4, 2026."}],"balance_after":28943,"derivative":{"exercise_price":1.85,"expiration_date":"2032-02-04","underlying":"Common Stock","underlying_shares":28943},"source":{"system":"sec-edgar","filing":"0000950170-23-063927","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":18,"url":"https://www.sec.gov/Archives/edgar/data/1527599/000095017023063927/ownership.xml","form_type":"4"}},{"id":1741958,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":34400,"kind":"person","name":"Brennan Aoife","position":1,"cik":"0001714563","reported_name":"Brennan Aoife","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Stock Option (right to buy)","published_at":"2023-11-15T00:23:02.000Z","date":"2023-11-10","kind":"grant","planned":false,"acquired":true,"shares":18999,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The shares subject to this option vest in approximately equal monthly installments beginning on April 1, 2021 through April 1, 2025."}],"balance_after":18999,"derivative":{"exercise_price":1.85,"expiration_date":"2031-03-10","underlying":"Common Stock","underlying_shares":18999},"source":{"system":"sec-edgar","filing":"0000950170-23-063927","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":17,"url":"https://www.sec.gov/Archives/edgar/data/1527599/000095017023063927/ownership.xml","form_type":"4"}},{"id":1741957,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":34400,"kind":"person","name":"Brennan Aoife","position":1,"cik":"0001714563","reported_name":"Brennan Aoife","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Stock Option (right to buy)","published_at":"2023-11-15T00:23:02.000Z","date":"2023-11-10","kind":"grant","planned":false,"acquired":true,"shares":12352,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The shares subject to this option vest in approximately equal monthly installments beginning on April 1, 2020 through April 1, 2024."}],"balance_after":12352,"derivative":{"exercise_price":1.85,"expiration_date":"2030-03-10","underlying":"Common Stock","underlying_shares":12352},"source":{"system":"sec-edgar","filing":"0000950170-23-063927","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":16,"url":"https://www.sec.gov/Archives/edgar/data/1527599/000095017023063927/ownership.xml","form_type":"4"}},{"id":1741956,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":34400,"kind":"person","name":"Brennan Aoife","position":1,"cik":"0001714563","reported_name":"Brennan Aoife","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Stock Option (right to buy)","published_at":"2023-11-15T00:23:02.000Z","date":"2023-11-10","kind":"grant","planned":false,"acquired":true,"shares":12332,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The shares subject to this option are fully vested as of the date hereof."}],"balance_after":12332,"derivative":{"exercise_price":1.85,"expiration_date":"2029-03-05","underlying":"Common Stock","underlying_shares":12332},"source":{"system":"sec-edgar","filing":"0000950170-23-063927","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":15,"url":"https://www.sec.gov/Archives/edgar/data/1527599/000095017023063927/ownership.xml","form_type":"4"}},{"id":1741955,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":34400,"kind":"person","name":"Brennan Aoife","position":1,"cik":"0001714563","reported_name":"Brennan Aoife","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Stock Option (right to buy)","published_at":"2023-11-15T00:23:02.000Z","date":"2023-11-10","kind":"grant","planned":false,"acquired":true,"shares":9999,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The shares subject to this option are fully vested as of the date hereof."}],"balance_after":9999,"derivative":{"exercise_price":1.85,"expiration_date":"2028-10-31","underlying":"Common Stock","underlying_shares":9999},"source":{"system":"sec-edgar","filing":"0000950170-23-063927","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":14,"url":"https://www.sec.gov/Archives/edgar/data/1527599/000095017023063927/ownership.xml","form_type":"4"}},{"id":1741954,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":34400,"kind":"person","name":"Brennan Aoife","position":1,"cik":"0001714563","reported_name":"Brennan Aoife","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Stock Option (right to buy)","published_at":"2023-11-15T00:23:02.000Z","date":"2023-11-10","kind":"grant","planned":false,"acquired":true,"shares":3600,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The shares subject to this option are fully vested as of the date hereof."}],"balance_after":3600,"derivative":{"exercise_price":1.85,"expiration_date":"2028-06-05","underlying":"Common Stock","underlying_shares":3600},"source":{"system":"sec-edgar","filing":"0000950170-23-063927","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1527599/000095017023063927/ownership.xml","form_type":"4"}},{"id":1741953,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":34400,"kind":"person","name":"Brennan Aoife","position":1,"cik":"0001714563","reported_name":"Brennan Aoife","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Stock Option (right to buy)","published_at":"2023-11-15T00:23:02.000Z","date":"2023-11-10","kind":"grant","planned":false,"acquired":true,"shares":3733,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The shares subject to this option are fully vested as of the date hereof."}],"balance_after":3733,"derivative":{"exercise_price":1.85,"expiration_date":"2028-03-14","underlying":"Common Stock","underlying_shares":3733},"source":{"system":"sec-edgar","filing":"0000950170-23-063927","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1527599/000095017023063927/ownership.xml","form_type":"4"}},{"id":1741952,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":34400,"kind":"person","name":"Brennan Aoife","position":1,"cik":"0001714563","reported_name":"Brennan Aoife","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Stock Option (right to buy)","published_at":"2023-11-15T00:23:02.000Z","date":"2023-11-10","kind":"grant","planned":false,"acquired":true,"shares":5591,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The shares subject to this option are fully vested as of the date hereof."}],"balance_after":5591,"derivative":{"exercise_price":1.85,"expiration_date":"2027-05-15","underlying":"Common Stock","underlying_shares":5591},"source":{"system":"sec-edgar","filing":"0000950170-23-063927","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1527599/000095017023063927/ownership.xml","form_type":"4"}},{"id":1741951,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":34400,"kind":"person","name":"Brennan Aoife","position":1,"cik":"0001714563","reported_name":"Brennan Aoife","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Stock Option (right to buy)","published_at":"2023-11-15T00:23:02.000Z","date":"2023-11-10","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":8666,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"These performance-based stock options, granted on March 16, 2023, vest when the achievement of certain clinical and regulatory development milestones are met."}],"balance_after":0,"derivative":{"exercise_price":9.3,"expiration_date":"2033-03-16","underlying":"Common Stock","underlying_shares":8666},"source":{"system":"sec-edgar","filing":"0000950170-23-063927","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1527599/000095017023063927/ownership.xml","form_type":"4"}},{"id":1741950,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":34400,"kind":"person","name":"Brennan Aoife","position":1,"cik":"0001714563","reported_name":"Brennan Aoife","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Stock Option (right to buy)","published_at":"2023-11-15T00:23:02.000Z","date":"2023-11-10","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":42999,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"The shares subject to this option vest in approximately equal monthly installments beginning on April 1, 2023 through April 1, 2027."}],"balance_after":0,"derivative":{"exercise_price":9.3,"expiration_date":"2033-03-16","underlying":"Common Stock","underlying_shares":42999},"source":{"system":"sec-edgar","filing":"0000950170-23-063927","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1527599/000095017023063927/ownership.xml","form_type":"4"}},{"id":1741949,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":34400,"kind":"person","name":"Brennan Aoife","position":1,"cik":"0001714563","reported_name":"Brennan Aoife","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Stock Option (right to buy)","published_at":"2023-11-15T00:23:02.000Z","date":"2023-11-10","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":28943,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"The shares subject to this option vest in approximately equal monthly installments beginning on February 4, 2022 through February 4, 2026."}],"balance_after":0,"derivative":{"exercise_price":29.25,"expiration_date":"2032-02-04","underlying":"Common Stock","underlying_shares":28943},"source":{"system":"sec-edgar","filing":"0000950170-23-063927","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1527599/000095017023063927/ownership.xml","form_type":"4"}},{"id":1741948,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":34400,"kind":"person","name":"Brennan Aoife","position":1,"cik":"0001714563","reported_name":"Brennan Aoife","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Stock Option (right to buy)","published_at":"2023-11-15T00:23:02.000Z","date":"2023-11-10","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":18999,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. 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Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. 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Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. 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Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"These performance-based stock options, granted on March 16, 2023, vest when the achievement of certain clinical and regulatory development milestones are met."}],"balance_after":0,"derivative":{"exercise_price":9.3,"expiration_date":"2033-03-16","underlying":"Common Stock","underlying_shares":6666},"source":{"system":"sec-edgar","filing":"0000950170-23-063926","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1527599/000095017023063926/ownership.xml","form_type":"4"}},{"id":1741937,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":108296,"kind":"person","name":"JENSEN MICHAEL VANGSTED","position":1,"cik":"0001914184","reported_name":"JENSEN MICHAEL VANGSTED","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Stock Option (right to buy)","published_at":"2023-11-15T00:22:53.000Z","date":"2023-11-10","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":13332,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The shares subject to this option vest in approximately equal monthly installments beginning on April 1, 2023 through April 1, 2027."}],"balance_after":0,"derivative":{"exercise_price":9.3,"expiration_date":"2033-03-16","underlying":"Common Stock","underlying_shares":13332},"source":{"system":"sec-edgar","filing":"0000950170-23-063926","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1527599/000095017023063926/ownership.xml","form_type":"4"}},{"id":1741936,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":108296,"kind":"person","name":"JENSEN MICHAEL VANGSTED","position":1,"cik":"0001914184","reported_name":"JENSEN MICHAEL VANGSTED","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Stock Option (right to buy)","published_at":"2023-11-15T00:22:53.000Z","date":"2023-11-10","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":15332,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"These stock options vested 25% on the first anniversary of the March 3, 2022 grant date, and vest in 36 substantially-equal monthly installments thereafter, subject to the reporting person's continued employment through the applicable vesting date."}],"balance_after":0,"derivative":{"exercise_price":33.45,"expiration_date":"2032-03-03","underlying":"Common Stock","underlying_shares":15332},"source":{"system":"sec-edgar","filing":"0000950170-23-063926","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1527599/000095017023063926/ownership.xml","form_type":"4"}},{"id":1741935,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":92216,"kind":"person","name":"Awad Antoine","position":1,"cik":"0001820122","reported_name":"Awad Antoine","relationship":{"officer":true,"officer_title":"Chief Operating Officer"}}],"security":"Stock Option (right to buy)","published_at":"2023-11-15T00:22:51.000Z","date":"2023-11-10","kind":"grant","planned":false,"acquired":true,"shares":16666,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F8","text":"The shares subject to this option vest in approximately equal monthly installments beginning on April 1, 2023 through April 1, 2027."}],"balance_after":16666,"derivative":{"exercise_price":1.85,"expiration_date":"2033-03-16","underlying":"Common Stock","underlying_shares":16666},"source":{"system":"sec-edgar","filing":"0000950170-23-063925","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":16,"url":"https://www.sec.gov/Archives/edgar/data/1527599/000095017023063925/ownership.xml","form_type":"4"}},{"id":1741934,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":92216,"kind":"person","name":"Awad Antoine","position":1,"cik":"0001820122","reported_name":"Awad Antoine","relationship":{"officer":true,"officer_title":"Chief Operating Officer"}}],"security":"Stock Option (right to buy)","published_at":"2023-11-15T00:22:51.000Z","date":"2023-11-10","kind":"grant","planned":false,"acquired":true,"shares":11031,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"The shares subject to this option vest in approximately equal monthly installments beginning on February 4, 2022 through February 4, 2026."}],"balance_after":11031,"derivative":{"exercise_price":1.85,"expiration_date":"2032-02-04","underlying":"Common Stock","underlying_shares":11031},"source":{"system":"sec-edgar","filing":"0000950170-23-063925","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":15,"url":"https://www.sec.gov/Archives/edgar/data/1527599/000095017023063925/ownership.xml","form_type":"4"}},{"id":1741933,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":92216,"kind":"person","name":"Awad Antoine","position":1,"cik":"0001820122","reported_name":"Awad Antoine","relationship":{"officer":true,"officer_title":"Chief Operating Officer"}}],"security":"Stock Option (right to buy)","published_at":"2023-11-15T00:22:51.000Z","date":"2023-11-10","kind":"grant","planned":false,"acquired":true,"shares":4666,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"The shares subject to this option vest in approximately equal monthly installments beginning on April 1, 2021 through April 1, 2025."}],"balance_after":4666,"derivative":{"exercise_price":1.85,"expiration_date":"2031-03-10","underlying":"Common Stock","underlying_shares":4666},"source":{"system":"sec-edgar","filing":"0000950170-23-063925","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":14,"url":"https://www.sec.gov/Archives/edgar/data/1527599/000095017023063925/ownership.xml","form_type":"4"}},{"id":1741932,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":92216,"kind":"person","name":"Awad Antoine","position":1,"cik":"0001820122","reported_name":"Awad Antoine","relationship":{"officer":true,"officer_title":"Chief Operating Officer"}}],"security":"Stock Option (right to buy)","published_at":"2023-11-15T00:22:51.000Z","date":"2023-11-10","kind":"grant","planned":false,"acquired":true,"shares":4666,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"The shares subject to this option vest in approximately equal monthly installments beginning on July 1, 2020 through July 1, 2024."}],"balance_after":4666,"derivative":{"exercise_price":1.85,"expiration_date":"2030-07-14","underlying":"Common Stock","underlying_shares":4666},"source":{"system":"sec-edgar","filing":"0000950170-23-063925","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1527599/000095017023063925/ownership.xml","form_type":"4"}},{"id":1741931,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":92216,"kind":"person","name":"Awad Antoine","position":1,"cik":"0001820122","reported_name":"Awad Antoine","relationship":{"officer":true,"officer_title":"Chief Operating Officer"}}],"security":"Stock Option (right to buy)","published_at":"2023-11-15T00:22:51.000Z","date":"2023-11-10","kind":"grant","planned":false,"acquired":true,"shares":4666,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The shares subject to this option vest in approximately equal monthly installments beginning on April 1, 2020 through April 1, 2024."}],"balance_after":4666,"derivative":{"exercise_price":1.85,"expiration_date":"2030-03-10","underlying":"Common Stock","underlying_shares":4666},"source":{"system":"sec-edgar","filing":"0000950170-23-063925","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1527599/000095017023063925/ownership.xml","form_type":"4"}},{"id":1741930,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":92216,"kind":"person","name":"Awad Antoine","position":1,"cik":"0001820122","reported_name":"Awad Antoine","relationship":{"officer":true,"officer_title":"Chief Operating Officer"}}],"security":"Stock Option (right to buy)","published_at":"2023-11-15T00:22:51.000Z","date":"2023-11-10","kind":"grant","planned":false,"acquired":true,"shares":6666,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"These performance-based stock options, granted on March 16, 2023, vest when the achievement of certain clinical and regulatory development milestones are met."}],"balance_after":6666,"derivative":{"exercise_price":1.85,"expiration_date":"2033-03-16","underlying":"Common Stock","underlying_shares":6666},"source":{"system":"sec-edgar","filing":"0000950170-23-063925","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1527599/000095017023063925/ownership.xml","form_type":"4"}},{"id":1741929,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":92216,"kind":"person","name":"Awad Antoine","position":1,"cik":"0001820122","reported_name":"Awad Antoine","relationship":{"officer":true,"officer_title":"Chief Operating Officer"}}],"security":"Stock Option (right to buy)","published_at":"2023-11-15T00:22:51.000Z","date":"2023-11-10","kind":"grant","planned":false,"acquired":true,"shares":666,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The shares subject to this option are fully vested as of the date hereof."}],"balance_after":666,"derivative":{"exercise_price":1.85,"expiration_date":"2029-03-05","underlying":"Common Stock","underlying_shares":666},"source":{"system":"sec-edgar","filing":"0000950170-23-063925","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1527599/000095017023063925/ownership.xml","form_type":"4"}},{"id":1741928,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":92216,"kind":"person","name":"Awad Antoine","position":1,"cik":"0001820122","reported_name":"Awad Antoine","relationship":{"officer":true,"officer_title":"Chief Operating Officer"}}],"security":"Stock Option (right to buy)","published_at":"2023-11-15T00:22:51.000Z","date":"2023-11-10","kind":"grant","planned":false,"acquired":true,"shares":3666,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The shares subject to this option are fully vested as of the date hereof."}],"balance_after":3666,"derivative":{"exercise_price":1.85,"expiration_date":"2029-02-28","underlying":"Common Stock","underlying_shares":3666},"source":{"system":"sec-edgar","filing":"0000950170-23-063925","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1527599/000095017023063925/ownership.xml","form_type":"4"}},{"id":1741927,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":92216,"kind":"person","name":"Awad Antoine","position":1,"cik":"0001820122","reported_name":"Awad Antoine","relationship":{"officer":true,"officer_title":"Chief Operating Officer"}}],"security":"Stock Option (right to buy)","published_at":"2023-11-15T00:22:51.000Z","date":"2023-11-10","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":16666,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F8","text":"The shares subject to this option vest in approximately equal monthly installments beginning on April 1, 2023 through April 1, 2027."}],"balance_after":0,"derivative":{"exercise_price":9.3,"expiration_date":"2033-03-16","underlying":"Common Stock","underlying_shares":16666},"source":{"system":"sec-edgar","filing":"0000950170-23-063925","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1527599/000095017023063925/ownership.xml","form_type":"4"}},{"id":1741926,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":92216,"kind":"person","name":"Awad Antoine","position":1,"cik":"0001820122","reported_name":"Awad Antoine","relationship":{"officer":true,"officer_title":"Chief Operating Officer"}}],"security":"Stock Option (right to buy)","published_at":"2023-11-15T00:22:51.000Z","date":"2023-11-10","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":11031,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. Except for the modified exercise price, all other terms and conditions of each of the option awards will continue as set forth in the Plan and the applicable award agreements."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In accordance with the terms of the Synlogic, Inc. 2015 Equity Incentive Award Plan and the Company's 2017 Stock Incentive Plan (together the \"Plans\"), the Board of Directors of Synlogic, Inc. approved a stock option repricing pursuant to which option awards granted under the Plans were amended to reduce the exercise price to $1.85 per share, the closing stock price of the Company's Common Stock on November 10, 2023. 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OrbiMed Capital GP VI LLC (\"GP VI\") is the general partner of OPI VI, and OrbiMed Advisors LLC (\"OrbiMed Advisors\"), a registered investment adviser under the Investment Advisors Act of 1940, as amended, is the managing member of GP VI. By virtue of such relationships, GP VI and OrbiMed Advisors may be deemed to have voting and investment power with respect to the securities held by OPI VI noted above and as a result may be deemed to beneficially own such securities for purposes of Rule 13d-3 under the Securities Exchange Act of 1934, as amended (the \"Exchange Act\"). OrbiMed Advisors exercises this investment and voting power through a management committee comprised of Carl L. Gordon, Sven H. Borho, and Jonathan T. Silverstein, each of whom disclaims beneficial ownership of the Shares held by OPI VI."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"This report on Form 4 is jointly filed by GP VI and OrbiMed Advisors. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Rule 16a-1(a) under the Exchange Act, except to the extent of its pecuniary interest therein, if any. The Reporting Persons have designated a representative, currently Chau Khuong (\"Khuong\"), an employee of OrbiMed Advisors, to serve on the Issuer's board of directors. This report shall not be deemed an admission that any of the Reporting Persons or Khuong is a beneficial owner of such securities for the purposes of Section 16 of the Exchange Act, or for any other purposes."}],"balance_after":3696662,"source":{"system":"sec-edgar","filing":"0000947871-21-000455","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1055951/000094787121000455/ownership.xml","form_type":"4"}},{"id":2741757,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":111954,"kind":"person","name":"Khuong Chau Quang","position":1,"cik":"0001609405","reported_name":"Khuong Chau Quang","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock, $0.001 par value","published_at":"2021-04-22T21:11:02.000Z","date":"2021-04-20","kind":"grant","acquired":true,"shares":1666666,"price":3,"value":4999998.0,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"These shares of the Issuer's common stock were sold in an underwritten public offering at a price of $3.00 per share."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"These shares of the Issuer's common stock are held of record by OrbiMed Private Investments VI, LP (\"OPI VI\"). OrbiMed Capital GP VI LLC (\"GP V\") is the general partner of OPI VI, and OrbiMed Advisors LLC (\"OrbiMed Advisors\"), a registered investment adviser under the Investment Advisors Act of 1940, as amended, is the managing member of GP VI. The Reporting Person is an employee of OrbiMed Advisors. By virtue of such relationships, GP VI and OrbiMed Advisors may be deemed to have voting and investment power with respect to the securities held by OPI VI noted above and as a result may be deemed to beneficially own such securities for purposes of Rule 13d-3 under the Securities Exchange Act of 1934, as amended (the \"Exchange Act\"). OrbiMed Advisors exercises this investment and voting power through a management committee comprised of Carl L. Gordon, Sven H. Borho, and Jonathan T. 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This report shall not be deemed an admission that any of the Reporting Person, GP VI or OrbiMed Advisors is a beneficial owner of such securities for the purposes of Section 16 of the Exchange Act, or for any other purposes."}],"balance_after":3696662,"source":{"system":"sec-edgar","filing":"0000947871-21-000454","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1527599/000094787121000454/ownership.xml","form_type":"4"}},{"id":2791257,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":141410,"kind":"person","name":"Riese Richard J.","position":1,"cik":"0001786692","reported_name":"Riese Richard J.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Stock Option (right to buy)","published_at":"2021-03-12T21:53:02.000Z","date":"2021-03-10","kind":"grant","acquired":true,"shares":70000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The option will vest and become exercisable in equal monthly installments for forty-eight months beginning on April 1, 2021, with the first installment vesting on May 1, 2021 subject to the Reporting Person continuing to provide services to the Issuer as Chief Medical Officer through each such vesting date."}],"balance_after":70000,"derivative":{"exercise_price":3.5,"expiration_date":"2031-03-10","underlying":"Common Stock","underlying_shares":70000},"source":{"system":"sec-edgar","filing":"0000899243-21-011336","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1527599/000089924321011336/doc4.xml","form_type":"4"}},{"id":2791256,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":141410,"kind":"person","name":"Riese Richard J.","position":1,"cik":"0001786692","reported_name":"Riese Richard J.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Common Stock","published_at":"2021-03-12T21:53:02.000Z","date":"2021-03-10","kind":"grant","acquired":true,"shares":17500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The shares of restricted stock were granted on March 10, 2021, and will vest beginning on April 1, 2021 (the \"Vesting Start Date\") in four equal annual installments on each anniversary of the Vesting Start Date, subject to the Reporting Person continuing to provide services to the Issuer as Chief Medical Officer through each such vesting date."}],"balance_after":39000,"source":{"system":"sec-edgar","filing":"0000899243-21-011336","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1527599/000089924321011336/doc4.xml","form_type":"4"}},{"id":2791255,"issuer":{"id":7801,"kind":"organization","name":"SYNLOGIC, INC."},"owners":[{"id":34400,"kind":"person","name":"Brennan Aoife","position":1,"cik":"0001714563","reported_name":"Brennan Aoife","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Stock Option (right to buy)","published_at":"2021-03-12T21:50:41.000Z","date":"2021-03-10","kind":"grant","acquired":true,"shares":285000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The option will vest and become exercisable in equal monthly installments for forty-eight months beginning on April 1, 2021, with the first installment vesting on May 1, 2021, subject to the Reporting Person continuing to provide services to the Issuer as Chief Executive Officer through each such vesting date."}],"balance_after":285000,"derivative":{"exercise_price":3.5,"expiration_date":"2031-03-10","underlying":"Common Stock","underlying_shares":285000},"source":{"system":"sec-edgar","filing":"0000899243-21-011334","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1527599/000089924321011334/doc4.xml","form_type":"4"}}],"next_cursor":"2021-03-12T21:50:41.000000Z,2791255"}