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The RSUs do not have an expiration date."}],"balance_after":22721,"derivative":{"underlying":"Common Stock","underlying_shares":22721},"source":{"system":"sec-edgar","filing":"0000899243-23-020079","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1609809/000089924323020079/doc4.xml","form_type":"4"}},{"id":1753006,"issuer":{"id":7191,"kind":"organization","name":"Seres Therapeutics, Inc."},"owners":[{"id":65846,"kind":"person","name":"Young Teresa L.","position":1,"cik":"0001814656","reported_name":"Young Teresa L.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Common Stock","published_at":"2023-11-01T01:40:54.000Z","date":"2023-10-30","kind":"sale","planned":true,"acquired":false,"shares":2907,"price":1.35,"value":3924.45,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 instruction adopted by the reporting person on April 18, 2023, solely with the intent to cover taxes in connection with the vesting of the RSUs."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in column 4 is a weighted average of the price.  These shares were sold in multiple transactions at prices ranging from $1.3425 to $1.405, 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 sold at each separate price within the range set forth in this footnote."}],"balance_after":8454,"source":{"system":"sec-edgar","filing":"0000899243-23-020079","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1609809/000089924323020079/doc4.xml","form_type":"4"}},{"id":1753005,"issuer":{"id":7191,"kind":"organization","name":"Seres Therapeutics, Inc."},"owners":[{"id":65846,"kind":"person","name":"Young Teresa L.","position":1,"cik":"0001814656","reported_name":"Young Teresa L.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Common Stock","published_at":"2023-11-01T01:40:54.000Z","date":"2023-10-27","kind":"exercise","planned":true,"acquired":true,"shares":11361,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On February 3, 2023, the reporting person was granted an award of 22,721 restricted stock units (\"RSUs\"), which vest in the form of shares of the Issuer's common stock in two substantially equal installments upon the satisfaction of certain performance criteria.  On April 27, 2023 (the \"Initial Milestone Date\"), the Issuer's Administrator determined that the performance criteria for the first installment were met, resulting in the vesting and settlement of the award as to 11,361 RSUs on October 27, 2023, the date that was six months from the Initial Milestone Date.  The remaining 11,360 RSUs shall vest on October 27, 2024, the date that is eighteen months from the Initial Milestone Date."}],"balance_after":11361,"source":{"system":"sec-edgar","filing":"0000899243-23-020079","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1609809/000089924323020079/doc4.xml","form_type":"4"}},{"id":2027994,"issuer":{"id":7191,"kind":"organization","name":"Seres Therapeutics, Inc."},"owners":[{"id":65846,"kind":"person","name":"Young Teresa L.","position":1,"cik":"0001814656","reported_name":"Young Teresa L.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Stock Option (Right to Buy)","published_at":"2023-02-07T22:43:24.000Z","date":"2023-02-03","kind":"grant","acquired":true,"shares":85000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The option will vest as to 25% of the shares on February 3, 2024. The remainder of the shares will vest in 12 equal quarterly installments thereafter."}],"balance_after":85000,"derivative":{"exercise_price":5.5,"expiration_date":"2033-02-02","underlying":"Common Stock","underlying_shares":85000},"source":{"system":"sec-edgar","filing":"0000899243-23-004200","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1609809/000089924323004200/doc4.xml","form_type":"4"}},{"id":2027993,"issuer":{"id":7191,"kind":"organization","name":"Seres Therapeutics, Inc."},"owners":[{"id":65846,"kind":"person","name":"Young Teresa L.","position":1,"cik":"0001814656","reported_name":"Young Teresa L.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Restricted Stock Units","published_at":"2023-02-07T22:43:24.000Z","date":"2023-02-03","kind":"grant","acquired":true,"shares":85000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit represents a contingent right to receive one share of Issuer common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The restricted stock units will vest and settle as to 100% of the restricted stock units on August 3, 2024."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The restricted stock units will vest and settle as to 100% of the restricted stock units on August 3, 2024."}],"balance_after":85000,"derivative":{"underlying":"Common Stock","underlying_shares":85000},"source":{"system":"sec-edgar","filing":"0000899243-23-004200","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1609809/000089924323004200/doc4.xml","form_type":"4"}},{"id":2027992,"issuer":{"id":7191,"kind":"organization","name":"Seres Therapeutics, Inc."},"owners":[{"id":65846,"kind":"person","name":"Young Teresa L.","position":1,"cik":"0001814656","reported_name":"Young Teresa L.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Restricted Stock Units","published_at":"2023-02-07T22:43:24.000Z","date":"2023-02-03","kind":"grant","acquired":true,"shares":42500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit represents a contingent right to receive one share of Issuer common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The restricted stock units will vest and settle as to 25% of the restricted stock units on February 15, 2024. The remainder of the restricted stock units will vest and settle in 12 equal quarterly installments thereafter."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The restricted stock units will vest and settle as to 25% of the restricted stock units on February 15, 2024. The remainder of the restricted stock units will vest and settle in 12 equal quarterly installments thereafter."}],"balance_after":42500,"derivative":{"underlying":"Common Stock","underlying_shares":42500},"source":{"system":"sec-edgar","filing":"0000899243-23-004200","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1609809/000089924323004200/doc4.xml","form_type":"4"}},{"id":2407851,"issuer":{"id":7191,"kind":"organization","name":"Seres Therapeutics, Inc."},"owners":[{"id":65846,"kind":"person","name":"Young Teresa L.","position":1,"cik":"0001814656","reported_name":"Young Teresa L.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Stock Option (Right to Buy)","published_at":"2022-02-09T02:30:52.000Z","date":"2022-02-04","kind":"grant","acquired":true,"shares":120000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The option will vest as to 25% of the shares on February 4, 2023. The remainder of the shares will vest in 12 equal quarterly installments thereafter."}],"balance_after":120000,"derivative":{"exercise_price":7.38,"expiration_date":"2032-02-03","underlying":"Common Stock","underlying_shares":120000},"source":{"system":"sec-edgar","filing":"0000899243-22-005319","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1609809/000089924322005319/doc4.xml","form_type":"4"}},{"id":2874016,"issuer":{"id":7191,"kind":"organization","name":"Seres Therapeutics, Inc."},"owners":[{"id":65846,"kind":"person","name":"Young Teresa L.","position":1,"cik":"0001814656","reported_name":"Young Teresa L.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Stock Option (Right to Buy)","published_at":"2021-02-08T23:51:38.000Z","date":"2021-02-04","kind":"grant","acquired":true,"shares":90000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The option will vest as to 25% of the shares on February 4, 2022. The remainder of the shares will vest in 12 equal quarterly installments thereafter."}],"balance_after":90000,"derivative":{"exercise_price":26.34,"expiration_date":"2031-02-03","underlying":"Common Stock","underlying_shares":90000},"source":{"system":"sec-edgar","filing":"0000899243-21-005247","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1609809/000089924321005247/doc4.xml","form_type":"4"}},{"id":3094841,"issuer":{"id":7191,"kind":"organization","name":"Seres Therapeutics, Inc."},"owners":[{"id":65846,"kind":"person","name":"Young Teresa L.","position":1,"cik":"0001814656","reported_name":"Young Teresa L.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Stock Option (Right to Buy)","published_at":"2020-07-01T20:07:38.000Z","date":"2020-06-29","kind":"grant","acquired":true,"shares":300000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The option will vest as to 25% of the shares on June 29, 2021. The remainder of the shares will vest in 12 equal quarterly installments thereafter."}],"balance_after":300000,"derivative":{"exercise_price":4.67,"expiration_date":"2030-06-28","underlying":"Common Stock","underlying_shares":300000},"source":{"system":"sec-edgar","filing":"0000899243-20-018111","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1609809/000089924320018111/doc4.xml","form_type":"4"}}]}