{"transactions":[{"id":709846,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (right to buy)","published_at":"2026-07-14T22:43:54.000Z","date":"2026-07-10","kind":"grant","planned":false,"acquired":true,"shares":3477,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"These stock options vest over one year as follows: 1/12 of the original grant amount vests in monthly installments for one year following the grant date; provided, however, that the stock options shall be fully vested on the earlier of the first anniversary of the grant date or the date of the issuer's next Annual Meeting of Stockholders, subject to the Reporting Person continuing to provide services to the issuer."}],"balance_after":3477,"derivative":{"exercise_price":1.97,"expiration_date":"2036-07-10","underlying":"Class A Common Stock","underlying_shares":3477},"source":{"system":"sec-edgar","filing":"0001871555-26-000002","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000187155526000002/ownership.xml","form_type":"4"}},{"id":709845,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (right to buy)","published_at":"2026-07-14T22:43:54.000Z","date":"2026-07-10","kind":"grant","planned":false,"acquired":true,"shares":34494,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Consists of stock options granted pursuant to the issuer's Non-Employee Director Compensation Policy and its 2021 Equity Incentive Plan. These stock options vest over one year as follows: 1/12 of the original grant amount vests in monthly installments for one year following the grant date; provided, however, that the stock options shall be fully vested on the earlier of the first anniversary of the grant date or the date of the issuer's next Annual Meeting of Stockholders, subject to the Reporting Person continuing to provide services to the issuer."}],"balance_after":34494,"derivative":{"exercise_price":1.97,"expiration_date":"2036-07-10","underlying":"Class A Common Stock","underlying_shares":34494},"source":{"system":"sec-edgar","filing":"0001871555-26-000002","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000187155526000002/ownership.xml","form_type":"4"}},{"id":709844,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2026-07-14T22:43:54.000Z","date":"2026-07-10","kind":"grant","planned":false,"acquired":true,"shares":2260,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Each share is represented by an additional RSU granted by the Board of Directors. These RSUs vest on the earlier of July 10, 2027 or the date of the issuer's next Annual Meeting of Stockholders, subject to the Reporting Person continuing to provide services to the issuer."}],"balance_after":81691,"source":{"system":"sec-edgar","filing":"0001871555-26-000002","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000187155526000002/ownership.xml","form_type":"4"}},{"id":709843,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2026-07-14T22:43:54.000Z","date":"2026-07-10","kind":"grant","planned":false,"acquired":true,"shares":22426,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Each share is represented by a restricted stock unit (\"RSU\") granted pursuant to the issuer's Non-Employee Director Compensation Policy and its 2021 Equity Incentive Plan. These RSUs vest on the earlier of July 10, 2027 or the date of the issuer's next Annual Meeting of Stockholders, subject to the Reporting Person continuing to provide services to the issuer."}],"balance_after":79431,"source":{"system":"sec-edgar","filing":"0001871555-26-000002","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000187155526000002/ownership.xml","form_type":"4"}},{"id":1119917,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (right to buy)","published_at":"2025-06-06T22:40:08.000Z","date":"2025-06-05","kind":"grant","planned":false,"acquired":true,"shares":25000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Consists of stock options granted pursuant to Sera Prognostics, Inc.'s Non-Employee Director Compensation Policy and its 2021 Equity Incentive Plan. These stock options vest over one year as follows: 1/12 of the original grant amount vests in monthly installments for one year following the vesting commencement date, which is June 5, 2025."}],"balance_after":25000,"derivative":{"exercise_price":1.6,"expiration_date":"2035-06-05","underlying":"Class A Common Stock","underlying_shares":25000},"source":{"system":"sec-edgar","filing":"0000950170-25-083337","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000095017025083337/ownership.xml","form_type":"4"}},{"id":1119916,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2025-06-06T22:40:08.000Z","date":"2025-06-05","kind":"grant","planned":false,"acquired":true,"shares":15596,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Each share is represented by a restricted stock unit (\"RSU\"). These RSUs vest over one year as follows: 1/12 of the original grant amount vests in monthly installments for one year following the vesting commencement date, which is June 5, 2025, subject to the Reporting Person continuing to provide services to the issuer."}],"balance_after":57005,"source":{"system":"sec-edgar","filing":"0000950170-25-083337","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000095017025083337/ownership.xml","form_type":"4"}},{"id":1303630,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2025-01-15T02:56:08.000Z","date":"2025-01-14","kind":"sale","planned":true,"acquired":false,"shares":2695,"price":6.29,"value":16951.55,"ownership":{"direct":false,"nature":"Held by Catalyst Health Ventures (PF), L.P."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transaction(s) reported on this Form 4 was/were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 10, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported is a weighted average price. These shares were sold as part of a block trade in multiple transactions at prices ranging from $6.03 to $6.57, inclusive. The Reporting Person will provide to the staff of the Securities and Exchange Commission, the issuer, or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price with regard to the block trade."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"CHV GP LLC is the general partner of CHV LP and Catalyst Health Ventures (PF), L.P. (\"CHV PF\"). CHV I GP LLC (formerly known as \"CHV III GP LLC\") is the general partner of CHV Investments LLC (\"CHV Investments\") and Catalyst Health Ventures Follow-on Fund, L.P. (\"CHV FO\", together with CHV LP, CHV PF and CHV Investments, the \"CHV Funds\"). Joshua Phillips, a member of the Issuer's board of directors, is a managing member of CHV GP LLC and CHV I GP LLC, and a limited partner of CHV PF, CHV Investments, CHV GP LLC, and CHV I GP LLC. The securities held by the CHV Funds may be deemed to be beneficially owned by Joshua Phillips. Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0000950170-25-005590","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":16,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000095017025005590/ownership.xml","form_type":"4"}},{"id":1303629,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2025-01-15T02:56:08.000Z","date":"2025-01-13","kind":"sale","planned":true,"acquired":false,"shares":3458,"price":6.39,"value":22096.62,"ownership":{"direct":false,"nature":"Held by Catalyst Health Ventures (PF), L.P."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transaction(s) reported on this Form 4 was/were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 10, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported is a weighted average price. These shares were sold as part of a block trade in multiple transactions at prices ranging from $6.13 to $6.75, inclusive. The Reporting Person will provide to the staff of the Securities and Exchange Commission, the issuer, or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price with regard to the block trade."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"CHV GP LLC is the general partner of CHV LP and Catalyst Health Ventures (PF), L.P. (\"CHV PF\"). CHV I GP LLC (formerly known as \"CHV III GP LLC\") is the general partner of CHV Investments LLC (\"CHV Investments\") and Catalyst Health Ventures Follow-on Fund, L.P. (\"CHV FO\", together with CHV LP, CHV PF and CHV Investments, the \"CHV Funds\"). Joshua Phillips, a member of the Issuer's board of directors, is a managing member of CHV GP LLC and CHV I GP LLC, and a limited partner of CHV PF, CHV Investments, CHV GP LLC, and CHV I GP LLC. The securities held by the CHV Funds may be deemed to be beneficially owned by Joshua Phillips. Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":2695,"source":{"system":"sec-edgar","filing":"0000950170-25-005590","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":15,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000095017025005590/ownership.xml","form_type":"4"}},{"id":1303628,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2025-01-15T02:56:08.000Z","date":"2025-01-10","kind":"sale","planned":true,"acquired":false,"shares":921,"price":8.03,"value":7395.63,"ownership":{"direct":false,"nature":"Held by Catalyst Health Ventures (PF), L.P."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transaction(s) reported on this Form 4 was/were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 10, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported is a weighted average price. These shares were sold as part of a block trade in multiple transactions at prices ranging from $8.00 to $8.07, inclusive. The Reporting Person will provide to the staff of the Securities and Exchange Commission, the issuer, or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price with regard to the block trade."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"CHV GP LLC is the general partner of CHV LP and Catalyst Health Ventures (PF), L.P. (\"CHV PF\"). CHV I GP LLC (formerly known as \"CHV III GP LLC\") is the general partner of CHV Investments LLC (\"CHV Investments\") and Catalyst Health Ventures Follow-on Fund, L.P. (\"CHV FO\", together with CHV LP, CHV PF and CHV Investments, the \"CHV Funds\"). Joshua Phillips, a member of the Issuer's board of directors, is a managing member of CHV GP LLC and CHV I GP LLC, and a limited partner of CHV PF, CHV Investments, CHV GP LLC, and CHV I GP LLC. The securities held by the CHV Funds may be deemed to be beneficially owned by Joshua Phillips. Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":6153,"source":{"system":"sec-edgar","filing":"0000950170-25-005590","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":14,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000095017025005590/ownership.xml","form_type":"4"}},{"id":1303627,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2025-01-15T02:56:08.000Z","date":"2025-01-10","kind":"sale","planned":true,"acquired":false,"shares":2692,"price":7.18,"value":19328.56,"ownership":{"direct":false,"nature":"Held by Catalyst Health Ventures (PF), L.P."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transaction(s) reported on this Form 4 was/were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 10, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported is a weighted average price. These shares were sold as part of a block trade in multiple transactions at prices ranging from $7.00 to $7.37, inclusive. The Reporting Person will provide to the staff of the Securities and Exchange Commission, the issuer, or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price with regard to the block trade."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"CHV GP LLC is the general partner of CHV LP and Catalyst Health Ventures (PF), L.P. (\"CHV PF\"). CHV I GP LLC (formerly known as \"CHV III GP LLC\") is the general partner of CHV Investments LLC (\"CHV Investments\") and Catalyst Health Ventures Follow-on Fund, L.P. (\"CHV FO\", together with CHV LP, CHV PF and CHV Investments, the \"CHV Funds\"). Joshua Phillips, a member of the Issuer's board of directors, is a managing member of CHV GP LLC and CHV I GP LLC, and a limited partner of CHV PF, CHV Investments, CHV GP LLC, and CHV I GP LLC. The securities held by the CHV Funds may be deemed to be beneficially owned by Joshua Phillips. Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":7074,"source":{"system":"sec-edgar","filing":"0000950170-25-005590","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000095017025005590/ownership.xml","form_type":"4"}},{"id":1303626,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2025-01-15T02:56:08.000Z","date":"2025-01-14","kind":"sale","planned":true,"acquired":false,"shares":1814,"price":6.29,"value":11410.06,"ownership":{"direct":false,"nature":"Held by Catalyst Health Ventures, L.P."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transaction(s) reported on this Form 4 was/were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 10, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported is a weighted average price. These shares were sold as part of a block trade in multiple transactions at prices ranging from $6.03 to $6.57, inclusive. The Reporting Person will provide to the staff of the Securities and Exchange Commission, the issuer, or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price with regard to the block trade."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"CHV GP LLC is the general partner of CHV LP and Catalyst Health Ventures (PF), L.P. (\"CHV PF\"). CHV I GP LLC (formerly known as \"CHV III GP LLC\") is the general partner of CHV Investments LLC (\"CHV Investments\") and Catalyst Health Ventures Follow-on Fund, L.P. (\"CHV FO\", together with CHV LP, CHV PF and CHV Investments, the \"CHV Funds\"). Joshua Phillips, a member of the Issuer's board of directors, is a managing member of CHV GP LLC and CHV I GP LLC, and a limited partner of CHV PF, CHV Investments, CHV GP LLC, and CHV I GP LLC. The securities held by the CHV Funds may be deemed to be beneficially owned by Joshua Phillips. Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0000950170-25-005590","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000095017025005590/ownership.xml","form_type":"4"}},{"id":1303625,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2025-01-15T02:56:08.000Z","date":"2025-01-13","kind":"sale","planned":true,"acquired":false,"shares":2415,"price":6.39,"value":15431.85,"ownership":{"direct":false,"nature":"Held by Catalyst Health Ventures, L.P."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transaction(s) reported on this Form 4 was/were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 10, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported is a weighted average price. These shares were sold as part of a block trade in multiple transactions at prices ranging from $6.13 to $6.75, inclusive. The Reporting Person will provide to the staff of the Securities and Exchange Commission, the issuer, or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price with regard to the block trade."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"CHV GP LLC is the general partner of CHV LP and Catalyst Health Ventures (PF), L.P. (\"CHV PF\"). CHV I GP LLC (formerly known as \"CHV III GP LLC\") is the general partner of CHV Investments LLC (\"CHV Investments\") and Catalyst Health Ventures Follow-on Fund, L.P. (\"CHV FO\", together with CHV LP, CHV PF and CHV Investments, the \"CHV Funds\"). Joshua Phillips, a member of the Issuer's board of directors, is a managing member of CHV GP LLC and CHV I GP LLC, and a limited partner of CHV PF, CHV Investments, CHV GP LLC, and CHV I GP LLC. The securities held by the CHV Funds may be deemed to be beneficially owned by Joshua Phillips. Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":1814,"source":{"system":"sec-edgar","filing":"0000950170-25-005590","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000095017025005590/ownership.xml","form_type":"4"}},{"id":1303624,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2025-01-15T02:56:08.000Z","date":"2025-01-10","kind":"sale","planned":true,"acquired":false,"shares":643,"price":8.03,"value":5163.29,"ownership":{"direct":false,"nature":"Held by Catalyst Health Ventures, L.P."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transaction(s) reported on this Form 4 was/were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 10, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported is a weighted average price. These shares were sold as part of a block trade in multiple transactions at prices ranging from $8.00 to $8.07, inclusive. The Reporting Person will provide to the staff of the Securities and Exchange Commission, the issuer, or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price with regard to the block trade."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"CHV GP LLC is the general partner of CHV LP and Catalyst Health Ventures (PF), L.P. (\"CHV PF\"). CHV I GP LLC (formerly known as \"CHV III GP LLC\") is the general partner of CHV Investments LLC (\"CHV Investments\") and Catalyst Health Ventures Follow-on Fund, L.P. (\"CHV FO\", together with CHV LP, CHV PF and CHV Investments, the \"CHV Funds\"). Joshua Phillips, a member of the Issuer's board of directors, is a managing member of CHV GP LLC and CHV I GP LLC, and a limited partner of CHV PF, CHV Investments, CHV GP LLC, and CHV I GP LLC. The securities held by the CHV Funds may be deemed to be beneficially owned by Joshua Phillips. Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":4229,"source":{"system":"sec-edgar","filing":"0000950170-25-005590","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000095017025005590/ownership.xml","form_type":"4"}},{"id":1303623,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2025-01-15T02:56:08.000Z","date":"2025-01-10","kind":"sale","planned":true,"acquired":false,"shares":1881,"price":7.18,"value":13505.58,"ownership":{"direct":false,"nature":"Held by Catalyst Health Ventures, L.P."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transaction(s) reported on this Form 4 was/were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 10, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported is a weighted average price. These shares were sold as part of a block trade in multiple transactions at prices ranging from $7.00 to $7.37, inclusive. The Reporting Person will provide to the staff of the Securities and Exchange Commission, the issuer, or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price with regard to the block trade."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"CHV GP LLC is the general partner of CHV LP and Catalyst Health Ventures (PF), L.P. (\"CHV PF\"). CHV I GP LLC (formerly known as \"CHV III GP LLC\") is the general partner of CHV Investments LLC (\"CHV Investments\") and Catalyst Health Ventures Follow-on Fund, L.P. (\"CHV FO\", together with CHV LP, CHV PF and CHV Investments, the \"CHV Funds\"). Joshua Phillips, a member of the Issuer's board of directors, is a managing member of CHV GP LLC and CHV I GP LLC, and a limited partner of CHV PF, CHV Investments, CHV GP LLC, and CHV I GP LLC. The securities held by the CHV Funds may be deemed to be beneficially owned by Joshua Phillips. Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":4872,"source":{"system":"sec-edgar","filing":"0000950170-25-005590","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000095017025005590/ownership.xml","form_type":"4"}},{"id":1303622,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2025-01-15T02:56:08.000Z","date":"2025-01-14","kind":"sale","planned":true,"acquired":false,"shares":4827,"price":6.29,"value":30361.83,"ownership":{"direct":false,"nature":"Held by CHV Investments, LLC"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transaction(s) reported on this Form 4 was/were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 10, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported is a weighted average price. These shares were sold as part of a block trade in multiple transactions at prices ranging from $6.03 to $6.57, inclusive. The Reporting Person will provide to the staff of the Securities and Exchange Commission, the issuer, or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price with regard to the block trade."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"CHV GP LLC is the general partner of CHV LP and Catalyst Health Ventures (PF), L.P. (\"CHV PF\"). CHV I GP LLC (formerly known as \"CHV III GP LLC\") is the general partner of CHV Investments LLC (\"CHV Investments\") and Catalyst Health Ventures Follow-on Fund, L.P. (\"CHV FO\", together with CHV LP, CHV PF and CHV Investments, the \"CHV Funds\"). Joshua Phillips, a member of the Issuer's board of directors, is a managing member of CHV GP LLC and CHV I GP LLC, and a limited partner of CHV PF, CHV Investments, CHV GP LLC, and CHV I GP LLC. The securities held by the CHV Funds may be deemed to be beneficially owned by Joshua Phillips. Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0000950170-25-005590","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000095017025005590/ownership.xml","form_type":"4"}},{"id":1303621,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2025-01-15T02:56:08.000Z","date":"2025-01-13","kind":"sale","planned":true,"acquired":false,"shares":6287,"price":6.39,"value":40173.93,"ownership":{"direct":false,"nature":"Held by CHV Investments, LLC"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transaction(s) reported on this Form 4 was/were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 10, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported is a weighted average price. These shares were sold as part of a block trade in multiple transactions at prices ranging from $6.13 to $6.75, inclusive. The Reporting Person will provide to the staff of the Securities and Exchange Commission, the issuer, or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price with regard to the block trade."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"CHV GP LLC is the general partner of CHV LP and Catalyst Health Ventures (PF), L.P. (\"CHV PF\"). CHV I GP LLC (formerly known as \"CHV III GP LLC\") is the general partner of CHV Investments LLC (\"CHV Investments\") and Catalyst Health Ventures Follow-on Fund, L.P. (\"CHV FO\", together with CHV LP, CHV PF and CHV Investments, the \"CHV Funds\"). Joshua Phillips, a member of the Issuer's board of directors, is a managing member of CHV GP LLC and CHV I GP LLC, and a limited partner of CHV PF, CHV Investments, CHV GP LLC, and CHV I GP LLC. The securities held by the CHV Funds may be deemed to be beneficially owned by Joshua Phillips. Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":4827,"source":{"system":"sec-edgar","filing":"0000950170-25-005590","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000095017025005590/ownership.xml","form_type":"4"}},{"id":1303620,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2025-01-15T02:56:08.000Z","date":"2025-01-10","kind":"sale","planned":true,"acquired":false,"shares":1674,"price":8.03,"value":13442.22,"ownership":{"direct":false,"nature":"Held by CHV Investments, LLC"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transaction(s) reported on this Form 4 was/were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 10, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported is a weighted average price. These shares were sold as part of a block trade in multiple transactions at prices ranging from $8.00 to $8.07, inclusive. The Reporting Person will provide to the staff of the Securities and Exchange Commission, the issuer, or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price with regard to the block trade."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"CHV GP LLC is the general partner of CHV LP and Catalyst Health Ventures (PF), L.P. (\"CHV PF\"). CHV I GP LLC (formerly known as \"CHV III GP LLC\") is the general partner of CHV Investments LLC (\"CHV Investments\") and Catalyst Health Ventures Follow-on Fund, L.P. (\"CHV FO\", together with CHV LP, CHV PF and CHV Investments, the \"CHV Funds\"). Joshua Phillips, a member of the Issuer's board of directors, is a managing member of CHV GP LLC and CHV I GP LLC, and a limited partner of CHV PF, CHV Investments, CHV GP LLC, and CHV I GP LLC. The securities held by the CHV Funds may be deemed to be beneficially owned by Joshua Phillips. Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":11114,"source":{"system":"sec-edgar","filing":"0000950170-25-005590","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000095017025005590/ownership.xml","form_type":"4"}},{"id":1303619,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2025-01-15T02:56:08.000Z","date":"2025-01-10","kind":"sale","planned":true,"acquired":false,"shares":4896,"price":7.18,"value":35153.28,"ownership":{"direct":false,"nature":"Held by CHV Investments, LLC"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transaction(s) reported on this Form 4 was/were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 10, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported is a weighted average price. These shares were sold as part of a block trade in multiple transactions at prices ranging from $7.00 to $7.37, inclusive. The Reporting Person will provide to the staff of the Securities and Exchange Commission, the issuer, or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price with regard to the block trade."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"CHV GP LLC is the general partner of CHV LP and Catalyst Health Ventures (PF), L.P. (\"CHV PF\"). CHV I GP LLC (formerly known as \"CHV III GP LLC\") is the general partner of CHV Investments LLC (\"CHV Investments\") and Catalyst Health Ventures Follow-on Fund, L.P. (\"CHV FO\", together with CHV LP, CHV PF and CHV Investments, the \"CHV Funds\"). Joshua Phillips, a member of the Issuer's board of directors, is a managing member of CHV GP LLC and CHV I GP LLC, and a limited partner of CHV PF, CHV Investments, CHV GP LLC, and CHV I GP LLC. The securities held by the CHV Funds may be deemed to be beneficially owned by Joshua Phillips. Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":12788,"source":{"system":"sec-edgar","filing":"0000950170-25-005590","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000095017025005590/ownership.xml","form_type":"4"}},{"id":1303618,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2025-01-15T02:56:08.000Z","date":"2025-01-14","kind":"sale","planned":true,"acquired":false,"shares":2,"price":6.29,"value":12.58,"ownership":{"direct":false,"nature":"Held by Catalyst Health Ventures Follow-on Fund, L.P."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transaction(s) reported on this Form 4 was/were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 10, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported is a weighted average price. These shares were sold as part of a block trade in multiple transactions at prices ranging from $6.03 to $6.57, inclusive. The Reporting Person will provide to the staff of the Securities and Exchange Commission, the issuer, or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price with regard to the block trade."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"CHV GP LLC is the general partner of CHV LP and Catalyst Health Ventures (PF), L.P. (\"CHV PF\"). CHV I GP LLC (formerly known as \"CHV III GP LLC\") is the general partner of CHV Investments LLC (\"CHV Investments\") and Catalyst Health Ventures Follow-on Fund, L.P. (\"CHV FO\", together with CHV LP, CHV PF and CHV Investments, the \"CHV Funds\"). Joshua Phillips, a member of the Issuer's board of directors, is a managing member of CHV GP LLC and CHV I GP LLC, and a limited partner of CHV PF, CHV Investments, CHV GP LLC, and CHV I GP LLC. The securities held by the CHV Funds may be deemed to be beneficially owned by Joshua Phillips. Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0000950170-25-005590","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000095017025005590/ownership.xml","form_type":"4"}},{"id":1303617,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2025-01-15T02:56:08.000Z","date":"2025-01-13","kind":"sale","planned":true,"acquired":false,"shares":3,"price":6.39,"value":19.17,"ownership":{"direct":false,"nature":"Held by Catalyst Health Ventures Follow-on Fund, L.P."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transaction(s) reported on this Form 4 was/were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 10, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported is a weighted average price. These shares were sold as part of a block trade in multiple transactions at prices ranging from $6.13 to $6.75, inclusive. The Reporting Person will provide to the staff of the Securities and Exchange Commission, the issuer, or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price with regard to the block trade."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"CHV GP LLC is the general partner of CHV LP and Catalyst Health Ventures (PF), L.P. (\"CHV PF\"). CHV I GP LLC (formerly known as \"CHV III GP LLC\") is the general partner of CHV Investments LLC (\"CHV Investments\") and Catalyst Health Ventures Follow-on Fund, L.P. (\"CHV FO\", together with CHV LP, CHV PF and CHV Investments, the \"CHV Funds\"). Joshua Phillips, a member of the Issuer's board of directors, is a managing member of CHV GP LLC and CHV I GP LLC, and a limited partner of CHV PF, CHV Investments, CHV GP LLC, and CHV I GP LLC. The securities held by the CHV Funds may be deemed to be beneficially owned by Joshua Phillips. Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":2,"source":{"system":"sec-edgar","filing":"0000950170-25-005590","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000095017025005590/ownership.xml","form_type":"4"}},{"id":1303616,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2025-01-15T02:56:08.000Z","date":"2025-01-10","kind":"sale","planned":true,"acquired":false,"shares":1,"price":8.03,"value":8.03,"ownership":{"direct":false,"nature":"Held by Catalyst Health Ventures Follow-on Fund, L.P."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transaction(s) reported on this Form 4 was/were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 10, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported is a weighted average price. These shares were sold as part of a block trade in multiple transactions at prices ranging from $8.00 to $8.07, inclusive. The Reporting Person will provide to the staff of the Securities and Exchange Commission, the issuer, or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price with regard to the block trade."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"CHV GP LLC is the general partner of CHV LP and Catalyst Health Ventures (PF), L.P. (\"CHV PF\"). CHV I GP LLC (formerly known as \"CHV III GP LLC\") is the general partner of CHV Investments LLC (\"CHV Investments\") and Catalyst Health Ventures Follow-on Fund, L.P. (\"CHV FO\", together with CHV LP, CHV PF and CHV Investments, the \"CHV Funds\"). Joshua Phillips, a member of the Issuer's board of directors, is a managing member of CHV GP LLC and CHV I GP LLC, and a limited partner of CHV PF, CHV Investments, CHV GP LLC, and CHV I GP LLC. The securities held by the CHV Funds may be deemed to be beneficially owned by Joshua Phillips. Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":5,"source":{"system":"sec-edgar","filing":"0000950170-25-005590","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000095017025005590/ownership.xml","form_type":"4"}},{"id":1303615,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2025-01-15T02:56:08.000Z","date":"2025-01-10","kind":"sale","planned":true,"acquired":false,"shares":2,"price":7.18,"value":14.36,"ownership":{"direct":false,"nature":"Held by Catalyst Health Ventures Follow-on Fund, L.P."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transaction(s) reported on this Form 4 was/were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 10, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported is a weighted average price. These shares were sold as part of a block trade in multiple transactions at prices ranging from $7.00 to $7.37, inclusive. The Reporting Person will provide to the staff of the Securities and Exchange Commission, the issuer, or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price with regard to the block trade."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"CHV GP LLC is the general partner of CHV LP and Catalyst Health Ventures (PF), L.P. (\"CHV PF\"). CHV I GP LLC (formerly known as \"CHV III GP LLC\") is the general partner of CHV Investments LLC (\"CHV Investments\") and Catalyst Health Ventures Follow-on Fund, L.P. (\"CHV FO\", together with CHV LP, CHV PF and CHV Investments, the \"CHV Funds\"). Joshua Phillips, a member of the Issuer's board of directors, is a managing member of CHV GP LLC and CHV I GP LLC, and a limited partner of CHV PF, CHV Investments, CHV GP LLC, and CHV I GP LLC. The securities held by the CHV Funds may be deemed to be beneficially owned by Joshua Phillips. Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":6,"source":{"system":"sec-edgar","filing":"0000950170-25-005590","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000095017025005590/ownership.xml","form_type":"4"}},{"id":1487133,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (right to buy)","published_at":"2024-06-07T20:31:24.000Z","date":"2024-06-06","kind":"grant","planned":false,"acquired":true,"shares":10549,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Consists of stock options granted pursuant to Sera Prognostics, Inc.'s Non-Employee Director Compensation Policy and its 2021 Equity Incentive Plan. These stock options vest over one year as follows: 1/12 of the original grant amount vests in monthly installments for one year following the vesting commencement date, which is June 6, 2024, subject to the reporting person continuing to provide services to the issuer."}],"balance_after":10549,"derivative":{"exercise_price":8.43,"expiration_date":"2034-06-06","underlying":"Class A Common Stock","underlying_shares":10549},"source":{"system":"sec-edgar","filing":"0001534969-24-000130","document":"wk-form4_1717792276.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000153496924000130/wk-form4_1717792276.xml","form_type":"4"}},{"id":1487132,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2024-06-07T20:31:24.000Z","date":"2024-06-06","kind":"grant","planned":false,"acquired":true,"shares":7117,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Each share is represented by a restricted stock unit (\"RSU\"). These RSUs vest over one year as follows: 1/12 of the original grant amount vests in monthly installments for one year following the vesting commencement date, which is June 6, 2024, subject to the reporting person continuing to provide services to the issuer."}],"balance_after":41409,"source":{"system":"sec-edgar","filing":"0001534969-24-000130","document":"wk-form4_1717792276.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000153496924000130/wk-form4_1717792276.xml","form_type":"4"}},{"id":1490328,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2024-06-06T00:35:18.000Z","date":"2024-06-03","kind":"other","planned":false,"acquired":false,"shares":36040,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Held by Catalyst Health Ventures Follow-on Fund, L.P."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F9","text":"CHV FO distributed these shares to its limited partners on a pro rata basis, for no consideration."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"CHV GP LLC is the general partner of CHV LP and Catalyst Health Ventures (PF), L.P. (\"CHV PF\"). CHV I GP LLC (formerly known as \"CHV III GP LLC\") is the general partner of CHV Investments LLC (\"CHV Investments\") and Catalyst Health Ventures Follow-on Fund, L.P. (\"CHV FO\", together with CHV LP, CHV PF and CHV Investments, the \"CHV Funds\"). Joshua Phillips, a member of the Issuer's board of directors, is a managing member of CHV GP LLC and CHV I GP LLC, and a limited partner of CHV PF, CHV Investments, CHV GP LLC, and CHV I GP LLC. The securities held by the CHV Funds may be deemed to be beneficially owned by Joshua Phillips. Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":8,"source":{"system":"sec-edgar","filing":"0001534969-24-000119","document":"wk-form4_1717634111.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000153496924000119/wk-form4_1717634111.xml","form_type":"4"}},{"id":1490327,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2024-06-06T00:35:18.000Z","date":"2024-06-03","kind":"other","planned":false,"acquired":true,"shares":5034,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F7","text":"Represents the pro-rata distribution from CHV Investments, and not a purchase or sale, without additional consideration."}],"balance_after":34292,"source":{"system":"sec-edgar","filing":"0001534969-24-000119","document":"wk-form4_1717634111.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000153496924000119/wk-form4_1717634111.xml","form_type":"4"}},{"id":1490326,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2024-06-06T00:35:18.000Z","date":"2024-06-03","kind":"other","planned":false,"acquired":true,"shares":2297,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Held by Trust"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F7","text":"Represents the pro-rata distribution from CHV Investments, and not a purchase or sale, without additional consideration."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"The shares are held by a living trust, of which the reporting person is a trustee and in which the reporting person has a beneficial interest."}],"balance_after":2297,"source":{"system":"sec-edgar","filing":"0001534969-24-000119","document":"wk-form4_1717634111.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000153496924000119/wk-form4_1717634111.xml","form_type":"4"}},{"id":1490325,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2024-06-06T00:35:18.000Z","date":"2024-06-03","kind":"other","planned":false,"acquired":false,"shares":356660,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Held by CHV Investments, LLC"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F6","text":"CHV Investments distributed these shares to its limited members on a pro rata basis, for no consideration."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"CHV GP LLC is the general partner of CHV LP and Catalyst Health Ventures (PF), L.P. 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Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":17684,"source":{"system":"sec-edgar","filing":"0001534969-24-000119","document":"wk-form4_1717634111.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000153496924000119/wk-form4_1717634111.xml","form_type":"4"}},{"id":1490324,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2024-06-06T00:35:18.000Z","date":"2024-06-03","kind":"other","planned":false,"acquired":true,"shares":1473,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F4","text":"Represents the pro-rata distribution from CHV PF, and not a purchase or sale, without additional consideration."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"Includes 25,815 shares received as a pro-rata distribution from CHV LP and 1,970 shares received as a pro-rata distribution from CHV PF. In prior reports, the reporting person reported beneficial ownership of 388,622 shares held directly by CHV LP and 166,098 shares held directly by CHV PF."}],"balance_after":29258,"source":{"system":"sec-edgar","filing":"0001534969-24-000119","document":"wk-form4_1717634111.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000153496924000119/wk-form4_1717634111.xml","form_type":"4"}},{"id":1490323,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2024-06-06T00:35:18.000Z","date":"2024-06-03","kind":"other","planned":false,"acquired":false,"shares":156332,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Held by Catalyst Health Ventures (PF), L.P."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"CHV PF distributed these shares to its limited partners on a pro rata basis, for no consideration."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"CHV GP LLC is the general partner of CHV LP and Catalyst Health Ventures (PF), L.P. 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Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":9766,"source":{"system":"sec-edgar","filing":"0001534969-24-000119","document":"wk-form4_1717634111.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000153496924000119/wk-form4_1717634111.xml","form_type":"4"}},{"id":1490322,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2024-06-06T00:35:18.000Z","date":"2024-06-03","kind":"other","planned":false,"acquired":false,"shares":381869,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Held by Catalyst Health Ventures, L.P."},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Catalyst Health Ventures, L.P. 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Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":6753,"source":{"system":"sec-edgar","filing":"0001534969-24-000119","document":"wk-form4_1717634111.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000153496924000119/wk-form4_1717634111.xml","form_type":"4"}},{"id":1833052,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (right to buy)","published_at":"2023-07-07T20:20:02.000Z","date":"2023-06-08","kind":"grant","planned":false,"acquired":true,"shares":63265,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Consists of stock options granted pursuant to Sera Prognostics, Inc.'s Non-Employee Director Compensation Policy and its 2021 Equity Incentive Plan. These stock options vest over one year as follows: 1/12 of the original grant amount vests in monthly installments for one year following the vesting commencement date, which is June 8, 2023."}],"balance_after":63265,"derivative":{"exercise_price":3,"expiration_date":"2033-06-08","underlying":"Class A Common Stock","underlying_shares":63265},"source":{"system":"sec-edgar","filing":"0001534969-23-000073","document":"wk-form4_1688761192.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000153496923000073/wk-form4_1688761192.xml","form_type":"4"}},{"id":2242627,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (right to buy)","published_at":"2022-06-06T20:58:01.000Z","date":"2022-06-03","kind":"grant","acquired":true,"shares":149675,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Consists of stock options granted pursuant to Sera Prognostics, Inc.'s Non-Employee Director Compensation Policy and its 2021 Equity Incentive Plan. These stock options vest over one year as follows: 1/12 of the original grant amount vests in monthly installments for one year following the vesting commencement date, which is June 3, 2022."}],"balance_after":149675,"derivative":{"exercise_price":1.35,"expiration_date":"2032-06-03","underlying":"Class A Common Stock","underlying_shares":149675},"source":{"system":"sec-edgar","filing":"0001534969-22-000085","document":"wf-form4_165454906706619.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000153496922000085/wf-form4_165454906706619.xml","form_type":"4"}},{"id":2628402,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Series D Preferred Stock","published_at":"2021-07-21T22:01:16.000Z","date":"2021-07-19","kind":"exercise","acquired":false,"shares":3713,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Held by Catalyst Health Ventures Follow-on Fund, L.P."},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F6","text":"The Issuer's Series D Preferred Stock is convertible at the option of a holder at any time into shares of the Issuer's Class A Common Stock at a conversion price, as adjusted to reflect the Issuer's recent 1-for-0.481 reverse stock split, of $9.02 per share. The Series D Preferred Stock has no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F9","text":"The shares of preferred stock automatically converted into the Issuer's Class A Common Stock in accordance with the Issuer's Restated Certificate of Incorporation, as amended, immediately upon completion of the Issuer's initial public offering, which became effective on July 19, 2021."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"The Issuer's Series D Preferred Stock is convertible at the option of a holder at any time into shares of the Issuer's Class A Common Stock at a conversion price, as adjusted to reflect the Issuer's recent 1-for-0.481 reverse stock split, of $9.02 per share. The Series D Preferred Stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"CHV GP LLC is the general partner of Catalyst Health Ventures, L.P. 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Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":0,"derivative":{"underlying":"Class A Common Stock","underlying_shares":3713},"source":{"system":"sec-edgar","filing":"0001104659-21-094517","document":"tm2122781-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":26,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000110465921094517/tm2122781-1_4seq1.xml","form_type":"4"}},{"id":2628401,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Series C-1 Preferred Stock","published_at":"2021-07-21T22:01:16.000Z","date":"2021-07-19","kind":"exercise","acquired":false,"shares":32335,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Held by Catalyst Health Ventures Follow-on Fund, L.P."},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F7","text":"The Issuer's Series C-1 Preferred Stock is convertible at the option of a holder at any time into shares of the Issuer's Class A Common Stock at a conversion price, as adjusted to reflect the Issuer's recent 1-for-0.481 reverse stock split, of $12.37 per share. The Series C-1 Preferred Stock has no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F9","text":"The shares of preferred stock automatically converted into the Issuer's Class A Common Stock in accordance with the Issuer's Restated Certificate of Incorporation, as amended, immediately upon completion of the Issuer's initial public offering, which became effective on July 19, 2021."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F7","text":"The Issuer's Series C-1 Preferred Stock is convertible at the option of a holder at any time into shares of the Issuer's Class A Common Stock at a conversion price, as adjusted to reflect the Issuer's recent 1-for-0.481 reverse stock split, of $12.37 per share. The Series C-1 Preferred Stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"CHV GP LLC is the general partner of Catalyst Health Ventures, L.P. (\"CHV LP\") and Catalyst Health Ventures (PF), L.P. (\"CHV PF\"). CHV III GP LLC is the general partner of CHV Investments LLC (\"CHV Investments\") and Catalyst Health Ventures Follow-on Fund, L.P. (\"CHV FO\", together with CHV LP, CHV PF and CHV Investments, the \"CHV Funds\"). Joshua Phillips, a member of the Issuer's board of directors, is a managing member of CHV GP LLC and CHV III GP LLC, and a limited partner of CHV PF, CHV Investments, CHV GP LLC, and CHV III GP LLC. The securities held by the CHV Funds may be deemed to be beneficially owned by Joshua Phillips. Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":0,"derivative":{"underlying":"Class A Common Stock","underlying_shares":32335},"source":{"system":"sec-edgar","filing":"0001104659-21-094517","document":"tm2122781-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":25,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000110465921094517/tm2122781-1_4seq1.xml","form_type":"4"}},{"id":2628400,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Series E Preferred Stock","published_at":"2021-07-21T22:01:16.000Z","date":"2021-07-19","kind":"exercise","acquired":false,"shares":160601,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Held by CHV Investments, LLC"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F8","text":"The Issuer's Series E Preferred Stock is convertible at the option of a holder at any time into shares of the Issuer's Class A Common Stock at a conversion price, as adjusted to reflect the Issuer's recent 1-for-0.481 reverse stock split, of $12.45 per share. The Series E Preferred Stock has no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F9","text":"The shares of preferred stock automatically converted into the Issuer's Class A Common Stock in accordance with the Issuer's Restated Certificate of Incorporation, as amended, immediately upon completion of the Issuer's initial public offering, which became effective on July 19, 2021."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F8","text":"The Issuer's Series E Preferred Stock is convertible at the option of a holder at any time into shares of the Issuer's Class A Common Stock at a conversion price, as adjusted to reflect the Issuer's recent 1-for-0.481 reverse stock split, of $12.45 per share. The Series E Preferred Stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"CHV GP LLC is the general partner of Catalyst Health Ventures, L.P. (\"CHV LP\") and Catalyst Health Ventures (PF), L.P. (\"CHV PF\"). CHV III GP LLC is the general partner of CHV Investments LLC (\"CHV Investments\") and Catalyst Health Ventures Follow-on Fund, L.P. (\"CHV FO\", together with CHV LP, CHV PF and CHV Investments, the \"CHV Funds\"). Joshua Phillips, a member of the Issuer's board of directors, is a managing member of CHV GP LLC and CHV III GP LLC, and a limited partner of CHV PF, CHV Investments, CHV GP LLC, and CHV III GP LLC. The securities held by the CHV Funds may be deemed to be beneficially owned by Joshua Phillips. Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":0,"derivative":{"underlying":"Class A Common Stock","underlying_shares":160601},"source":{"system":"sec-edgar","filing":"0001104659-21-094517","document":"tm2122781-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":24,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000110465921094517/tm2122781-1_4seq1.xml","form_type":"4"}},{"id":2628399,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Series D Preferred Stock","published_at":"2021-07-21T22:01:16.000Z","date":"2021-07-19","kind":"exercise","acquired":false,"shares":39116,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Held by CHV Investments, LLC"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F6","text":"The Issuer's Series D Preferred Stock is convertible at the option of a holder at any time into shares of the Issuer's Class A Common Stock at a conversion price, as adjusted to reflect the Issuer's recent 1-for-0.481 reverse stock split, of $9.02 per share. The Series D Preferred Stock has no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F9","text":"The shares of preferred stock automatically converted into the Issuer's Class A Common Stock in accordance with the Issuer's Restated Certificate of Incorporation, as amended, immediately upon completion of the Issuer's initial public offering, which became effective on July 19, 2021."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"The Issuer's Series D Preferred Stock is convertible at the option of a holder at any time into shares of the Issuer's Class A Common Stock at a conversion price, as adjusted to reflect the Issuer's recent 1-for-0.481 reverse stock split, of $9.02 per share. The Series D Preferred Stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"CHV GP LLC is the general partner of Catalyst Health Ventures, L.P. (\"CHV LP\") and Catalyst Health Ventures (PF), L.P. (\"CHV PF\"). CHV III GP LLC is the general partner of CHV Investments LLC (\"CHV Investments\") and Catalyst Health Ventures Follow-on Fund, L.P. (\"CHV FO\", together with CHV LP, CHV PF and CHV Investments, the \"CHV Funds\"). Joshua Phillips, a member of the Issuer's board of directors, is a managing member of CHV GP LLC and CHV III GP LLC, and a limited partner of CHV PF, CHV Investments, CHV GP LLC, and CHV III GP LLC. The securities held by the CHV Funds may be deemed to be beneficially owned by Joshua Phillips. 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Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":0,"derivative":{"underlying":"Class A Common Stock","underlying_shares":85577},"source":{"system":"sec-edgar","filing":"0001104659-21-094517","document":"tm2122781-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":21,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000110465921094517/tm2122781-1_4seq1.xml","form_type":"4"}},{"id":2628396,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Series B-1 Preferred Stock","published_at":"2021-07-21T22:01:16.000Z","date":"2021-07-19","kind":"exercise","acquired":false,"shares":41193,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Held by CHV Investments, LLC"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F4","text":"The Issuer's Series B-1 Preferred Stock is convertible at the option of a holder at any time into shares of the Issuer's Class A Common Stock at a conversion price, as adjusted to reflect the Issuer's recent 1-for-0.481 reverse stock split, of $5.20 per share. 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Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":0,"derivative":{"underlying":"Class A Common Stock","underlying_shares":41193},"source":{"system":"sec-edgar","filing":"0001104659-21-094517","document":"tm2122781-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":20,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000110465921094517/tm2122781-1_4seq1.xml","form_type":"4"}},{"id":2628395,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Series A-2 Preferred Stock","published_at":"2021-07-21T22:01:16.000Z","date":"2021-07-19","kind":"exercise","acquired":false,"shares":166098,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Held by Catalyst Health Ventures (PF), L.P."},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"The Issuer's Series A-2 Preferred Stock is convertible at the option of a holder at any time into shares of the Issuer's Class A Common Stock at a conversion price, as adjusted to reflect the Issuer's recent 1-for-0.481 reverse stock split, of $5.20 per share. 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Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":0,"derivative":{"underlying":"Class A Common Stock","underlying_shares":166098},"source":{"system":"sec-edgar","filing":"0001104659-21-094517","document":"tm2122781-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":19,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000110465921094517/tm2122781-1_4seq1.xml","form_type":"4"}},{"id":2628394,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Series D Preferred Stock","published_at":"2021-07-21T22:01:16.000Z","date":"2021-07-19","kind":"exercise","acquired":false,"shares":24942,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Held by Catalyst Health Ventures, L.P."},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F6","text":"The Issuer's Series D Preferred Stock is convertible at the option of a holder at any time into shares of the Issuer's Class A Common Stock at a conversion price, as adjusted to reflect the Issuer's recent 1-for-0.481 reverse stock split, of $9.02 per share. The Series D Preferred Stock has no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F9","text":"The shares of preferred stock automatically converted into the Issuer's Class A Common Stock in accordance with the Issuer's Restated Certificate of Incorporation, as amended, immediately upon completion of the Issuer's initial public offering, which became effective on July 19, 2021."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"The Issuer's Series D Preferred Stock is convertible at the option of a holder at any time into shares of the Issuer's Class A Common Stock at a conversion price, as adjusted to reflect the Issuer's recent 1-for-0.481 reverse stock split, of $9.02 per share. The Series D Preferred Stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"CHV GP LLC is the general partner of Catalyst Health Ventures, L.P. 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Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":0,"derivative":{"underlying":"Class A Common Stock","underlying_shares":24942},"source":{"system":"sec-edgar","filing":"0001104659-21-094517","document":"tm2122781-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":18,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000110465921094517/tm2122781-1_4seq1.xml","form_type":"4"}},{"id":2628393,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Series B-2 Preferred Stock","published_at":"2021-07-21T22:01:16.000Z","date":"2021-07-19","kind":"exercise","acquired":false,"shares":34030,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Held by Catalyst Health Ventures, L.P."},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"The Issuer's Series B-2 Preferred Stock is convertible at the option of a holder at any time into shares of the Issuer's Class A Common Stock at a conversion price, as adjusted to reflect the Issuer's recent 1-for-0.481 reverse stock split, of $8.32 per share. The Series B-2 Preferred Stock has no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F9","text":"The shares of preferred stock automatically converted into the Issuer's Class A Common Stock in accordance with the Issuer's Restated Certificate of Incorporation, as amended, immediately upon completion of the Issuer's initial public offering, which became effective on July 19, 2021."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"The Issuer's Series B-2 Preferred Stock is convertible at the option of a holder at any time into shares of the Issuer's Class A Common Stock at a conversion price, as adjusted to reflect the Issuer's recent 1-for-0.481 reverse stock split, of $8.32 per share. The Series B-2 Preferred Stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"CHV GP LLC is the general partner of Catalyst Health Ventures, L.P. 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Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":0,"derivative":{"underlying":"Class A Common Stock","underlying_shares":34030},"source":{"system":"sec-edgar","filing":"0001104659-21-094517","document":"tm2122781-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":17,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000110465921094517/tm2122781-1_4seq1.xml","form_type":"4"}},{"id":2628392,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Series B-1 Preferred Stock","published_at":"2021-07-21T22:01:16.000Z","date":"2021-07-19","kind":"exercise","acquired":false,"shares":19240,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Held by Catalyst Health Ventures, L.P."},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F4","text":"The Issuer's Series B-1 Preferred Stock is convertible at the option of a holder at any time into shares of the Issuer's Class A Common Stock at a conversion price, as adjusted to reflect the Issuer's recent 1-for-0.481 reverse stock split, of $5.20 per share. The Series B-1 Preferred Stock has no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F9","text":"The shares of preferred stock automatically converted into the Issuer's Class A Common Stock in accordance with the Issuer's Restated Certificate of Incorporation, as amended, immediately upon completion of the Issuer's initial public offering, which became effective on July 19, 2021."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"The Issuer's Series B-1 Preferred Stock is convertible at the option of a holder at any time into shares of the Issuer's Class A Common Stock at a conversion price, as adjusted to reflect the Issuer's recent 1-for-0.481 reverse stock split, of $5.20 per share. The Series B-1 Preferred Stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"CHV GP LLC is the general partner of Catalyst Health Ventures, L.P. 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Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":0,"derivative":{"underlying":"Class A Common Stock","underlying_shares":19240},"source":{"system":"sec-edgar","filing":"0001104659-21-094517","document":"tm2122781-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":16,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000110465921094517/tm2122781-1_4seq1.xml","form_type":"4"}},{"id":2628391,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Series A-2 Preferred Stock","published_at":"2021-07-21T22:01:16.000Z","date":"2021-07-19","kind":"exercise","acquired":false,"shares":231678,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Held by Catalyst Health Ventures, L.P."},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"The Issuer's Series A-2 Preferred Stock is convertible at the option of a holder at any time into shares of the Issuer's Class A Common Stock at a conversion price, as adjusted to reflect the Issuer's recent 1-for-0.481 reverse stock split, of $5.20 per share. The Series A-2 Preferred Stock has no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F9","text":"The shares of preferred stock automatically converted into the Issuer's Class A Common Stock in accordance with the Issuer's Restated Certificate of Incorporation, as amended, immediately upon completion of the Issuer's initial public offering, which became effective on July 19, 2021."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The Issuer's Series A-2 Preferred Stock is convertible at the option of a holder at any time into shares of the Issuer's Class A Common Stock at a conversion price, as adjusted to reflect the Issuer's recent 1-for-0.481 reverse stock split, of $5.20 per share. The Series A-2 Preferred Stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"CHV GP LLC is the general partner of Catalyst Health Ventures, L.P. 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Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":0,"derivative":{"underlying":"Class A Common Stock","underlying_shares":231678},"source":{"system":"sec-edgar","filing":"0001104659-21-094517","document":"tm2122781-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":15,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000110465921094517/tm2122781-1_4seq1.xml","form_type":"4"}},{"id":2628390,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Series A-1 Preferred Stock","published_at":"2021-07-21T22:01:16.000Z","date":"2021-07-19","kind":"exercise","acquired":false,"shares":41182,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Held by Catalyst Health Ventures, L.P."},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The Issuer's Series A-1 Preferred Stock is convertible at the option of a holder at any time into shares of the Issuer's Class A Common Stock at a conversion price, as adjusted to reflect the Issuer's recent 1-for-0.481 reverse stock split, of $6.07 per share. The Series A-1 Preferred Stock has no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F9","text":"The shares of preferred stock automatically converted into the Issuer's Class A Common Stock in accordance with the Issuer's Restated Certificate of Incorporation, as amended, immediately upon completion of the Issuer's initial public offering, which became effective on July 19, 2021."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The Issuer's Series A-1 Preferred Stock is convertible at the option of a holder at any time into shares of the Issuer's Class A Common Stock at a conversion price, as adjusted to reflect the Issuer's recent 1-for-0.481 reverse stock split, of $6.07 per share. The Series A-1 Preferred Stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"CHV GP LLC is the general partner of Catalyst Health Ventures, L.P. (\"CHV LP\") and Catalyst Health Ventures (PF), L.P. (\"CHV PF\"). CHV III GP LLC is the general partner of CHV Investments LLC (\"CHV Investments\") and Catalyst Health Ventures Follow-on Fund, L.P. (\"CHV FO\", together with CHV LP, CHV PF and CHV Investments, the \"CHV Funds\"). Joshua Phillips, a member of the Issuer's board of directors, is a managing member of CHV GP LLC and CHV III GP LLC, and a limited partner of CHV PF, CHV Investments, CHV GP LLC, and CHV III GP LLC. The securities held by the CHV Funds may be deemed to be beneficially owned by Joshua Phillips. Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":0,"derivative":{"underlying":"Class A Common Stock","underlying_shares":41182},"source":{"system":"sec-edgar","filing":"0001104659-21-094517","document":"tm2122781-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":14,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000110465921094517/tm2122781-1_4seq1.xml","form_type":"4"}},{"id":2628389,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2021-07-21T22:01:16.000Z","date":"2021-07-19","kind":"exercise","acquired":true,"shares":3713,"ownership":{"direct":false,"nature":"Held by Catalyst Health Ventures Follow-on Fund, L.P."},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F6","text":"The Issuer's Series D Preferred Stock is convertible at the option of a holder at any time into shares of the Issuer's Class A Common Stock at a conversion price, as adjusted to reflect the Issuer's recent 1-for-0.481 reverse stock split, of $9.02 per share. The Series D Preferred Stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"CHV GP LLC is the general partner of Catalyst Health Ventures, L.P. (\"CHV LP\") and Catalyst Health Ventures (PF), L.P. (\"CHV PF\"). CHV III GP LLC is the general partner of CHV Investments LLC (\"CHV Investments\") and Catalyst Health Ventures Follow-on Fund, L.P. (\"CHV FO\", together with CHV LP, CHV PF and CHV Investments, the \"CHV Funds\"). Joshua Phillips, a member of the Issuer's board of directors, is a managing member of CHV GP LLC and CHV III GP LLC, and a limited partner of CHV PF, CHV Investments, CHV GP LLC, and CHV III GP LLC. The securities held by the CHV Funds may be deemed to be beneficially owned by Joshua Phillips. Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":965111,"source":{"system":"sec-edgar","filing":"0001104659-21-094517","document":"tm2122781-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000110465921094517/tm2122781-1_4seq1.xml","form_type":"4"}},{"id":2628388,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2021-07-21T22:01:16.000Z","date":"2021-07-19","kind":"exercise","acquired":true,"shares":32335,"ownership":{"direct":false,"nature":"Held by Catalyst Health Ventures Follow-on Fund, L.P."},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F7","text":"The Issuer's Series C-1 Preferred Stock is convertible at the option of a holder at any time into shares of the Issuer's Class A Common Stock at a conversion price, as adjusted to reflect the Issuer's recent 1-for-0.481 reverse stock split, of $12.37 per share. The Series C-1 Preferred Stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"CHV GP LLC is the general partner of Catalyst Health Ventures, L.P. (\"CHV LP\") and Catalyst Health Ventures (PF), L.P. (\"CHV PF\"). CHV III GP LLC is the general partner of CHV Investments LLC (\"CHV Investments\") and Catalyst Health Ventures Follow-on Fund, L.P. (\"CHV FO\", together with CHV LP, CHV PF and CHV Investments, the \"CHV Funds\"). Joshua Phillips, a member of the Issuer's board of directors, is a managing member of CHV GP LLC and CHV III GP LLC, and a limited partner of CHV PF, CHV Investments, CHV GP LLC, and CHV III GP LLC. The securities held by the CHV Funds may be deemed to be beneficially owned by Joshua Phillips. Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":961398,"source":{"system":"sec-edgar","filing":"0001104659-21-094517","document":"tm2122781-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000110465921094517/tm2122781-1_4seq1.xml","form_type":"4"}},{"id":2628387,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2021-07-21T22:01:16.000Z","date":"2021-07-19","kind":"exercise","acquired":true,"shares":160601,"ownership":{"direct":false,"nature":"Held by CHV Investments, LLC"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F8","text":"The Issuer's Series E Preferred Stock is convertible at the option of a holder at any time into shares of the Issuer's Class A Common Stock at a conversion price, as adjusted to reflect the Issuer's recent 1-for-0.481 reverse stock split, of $12.45 per share. The Series E Preferred Stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"CHV GP LLC is the general partner of Catalyst Health Ventures, L.P. (\"CHV LP\") and Catalyst Health Ventures (PF), L.P. (\"CHV PF\"). CHV III GP LLC is the general partner of CHV Investments LLC (\"CHV Investments\") and Catalyst Health Ventures Follow-on Fund, L.P. (\"CHV FO\", together with CHV LP, CHV PF and CHV Investments, the \"CHV Funds\"). Joshua Phillips, a member of the Issuer's board of directors, is a managing member of CHV GP LLC and CHV III GP LLC, and a limited partner of CHV PF, CHV Investments, CHV GP LLC, and CHV III GP LLC. The securities held by the CHV Funds may be deemed to be beneficially owned by Joshua Phillips. Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":929063,"source":{"system":"sec-edgar","filing":"0001104659-21-094517","document":"tm2122781-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000110465921094517/tm2122781-1_4seq1.xml","form_type":"4"}},{"id":2628386,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2021-07-21T22:01:16.000Z","date":"2021-07-19","kind":"exercise","acquired":true,"shares":39116,"ownership":{"direct":false,"nature":"Held by CHV Investments, LLC"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F6","text":"The Issuer's Series D Preferred Stock is convertible at the option of a holder at any time into shares of the Issuer's Class A Common Stock at a conversion price, as adjusted to reflect the Issuer's recent 1-for-0.481 reverse stock split, of $9.02 per share. The Series D Preferred Stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"CHV GP LLC is the general partner of Catalyst Health Ventures, L.P. (\"CHV LP\") and Catalyst Health Ventures (PF), L.P. (\"CHV PF\"). CHV III GP LLC is the general partner of CHV Investments LLC (\"CHV Investments\") and Catalyst Health Ventures Follow-on Fund, L.P. (\"CHV FO\", together with CHV LP, CHV PF and CHV Investments, the \"CHV Funds\"). Joshua Phillips, a member of the Issuer's board of directors, is a managing member of CHV GP LLC and CHV III GP LLC, and a limited partner of CHV PF, CHV Investments, CHV GP LLC, and CHV III GP LLC. The securities held by the CHV Funds may be deemed to be beneficially owned by Joshua Phillips. Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":768462,"source":{"system":"sec-edgar","filing":"0001104659-21-094517","document":"tm2122781-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000110465921094517/tm2122781-1_4seq1.xml","form_type":"4"}},{"id":2628385,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2021-07-21T22:01:16.000Z","date":"2021-07-19","kind":"exercise","acquired":true,"shares":47857,"ownership":{"direct":false,"nature":"Held by CHV Investments, LLC"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F7","text":"The Issuer's Series C-1 Preferred Stock is convertible at the option of a holder at any time into shares of the Issuer's Class A Common Stock at a conversion price, as adjusted to reflect the Issuer's recent 1-for-0.481 reverse stock split, of $12.37 per share. The Series C-1 Preferred Stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"CHV GP LLC is the general partner of Catalyst Health Ventures, L.P. (\"CHV LP\") and Catalyst Health Ventures (PF), L.P. (\"CHV PF\"). CHV III GP LLC is the general partner of CHV Investments LLC (\"CHV Investments\") and Catalyst Health Ventures Follow-on Fund, L.P. (\"CHV FO\", together with CHV LP, CHV PF and CHV Investments, the \"CHV Funds\"). Joshua Phillips, a member of the Issuer's board of directors, is a managing member of CHV GP LLC and CHV III GP LLC, and a limited partner of CHV PF, CHV Investments, CHV GP LLC, and CHV III GP LLC. The securities held by the CHV Funds may be deemed to be beneficially owned by Joshua Phillips. Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":729346,"source":{"system":"sec-edgar","filing":"0001104659-21-094517","document":"tm2122781-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000110465921094517/tm2122781-1_4seq1.xml","form_type":"4"}},{"id":2628384,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2021-07-21T22:01:16.000Z","date":"2021-07-19","kind":"exercise","acquired":true,"shares":85577,"ownership":{"direct":false,"nature":"Held by CHV Investments, LLC"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The Issuer's Series B-2 Preferred Stock is convertible at the option of a holder at any time into shares of the Issuer's Class A Common Stock at a conversion price, as adjusted to reflect the Issuer's recent 1-for-0.481 reverse stock split, of $8.32 per share. The Series B-2 Preferred Stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"CHV GP LLC is the general partner of Catalyst Health Ventures, L.P. (\"CHV LP\") and Catalyst Health Ventures (PF), L.P. (\"CHV PF\"). CHV III GP LLC is the general partner of CHV Investments LLC (\"CHV Investments\") and Catalyst Health Ventures Follow-on Fund, L.P. (\"CHV FO\", together with CHV LP, CHV PF and CHV Investments, the \"CHV Funds\"). Joshua Phillips, a member of the Issuer's board of directors, is a managing member of CHV GP LLC and CHV III GP LLC, and a limited partner of CHV PF, CHV Investments, CHV GP LLC, and CHV III GP LLC. The securities held by the CHV Funds may be deemed to be beneficially owned by Joshua Phillips. Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":681489,"source":{"system":"sec-edgar","filing":"0001104659-21-094517","document":"tm2122781-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000110465921094517/tm2122781-1_4seq1.xml","form_type":"4"}},{"id":2628383,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2021-07-21T22:01:16.000Z","date":"2021-07-19","kind":"exercise","acquired":true,"shares":41193,"ownership":{"direct":false,"nature":"Held by CHV Investments, LLC"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The Issuer's Series B-1 Preferred Stock is convertible at the option of a holder at any time into shares of the Issuer's Class A Common Stock at a conversion price, as adjusted to reflect the Issuer's recent 1-for-0.481 reverse stock split, of $5.20 per share. The Series B-1 Preferred Stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"CHV GP LLC is the general partner of Catalyst Health Ventures, L.P. (\"CHV LP\") and Catalyst Health Ventures (PF), L.P. (\"CHV PF\"). CHV III GP LLC is the general partner of CHV Investments LLC (\"CHV Investments\") and Catalyst Health Ventures Follow-on Fund, L.P. (\"CHV FO\", together with CHV LP, CHV PF and CHV Investments, the \"CHV Funds\"). Joshua Phillips, a member of the Issuer's board of directors, is a managing member of CHV GP LLC and CHV III GP LLC, and a limited partner of CHV PF, CHV Investments, CHV GP LLC, and CHV III GP LLC. The securities held by the CHV Funds may be deemed to be beneficially owned by Joshua Phillips. Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":595912,"source":{"system":"sec-edgar","filing":"0001104659-21-094517","document":"tm2122781-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000110465921094517/tm2122781-1_4seq1.xml","form_type":"4"}},{"id":2628382,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2021-07-21T22:01:16.000Z","date":"2021-07-19","kind":"exercise","acquired":true,"shares":166098,"ownership":{"direct":false,"nature":"Held by Catalyst Health Ventures (PF), L.P."},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The Issuer's Series A-2 Preferred Stock is convertible at the option of a holder at any time into shares of the Issuer's Class A Common Stock at a conversion price, as adjusted to reflect the Issuer's recent 1-for-0.481 reverse stock split, of $5.20 per share. The Series A-2 Preferred Stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"CHV GP LLC is the general partner of Catalyst Health Ventures, L.P. (\"CHV LP\") and Catalyst Health Ventures (PF), L.P. (\"CHV PF\"). CHV III GP LLC is the general partner of CHV Investments LLC (\"CHV Investments\") and Catalyst Health Ventures Follow-on Fund, L.P. (\"CHV FO\", together with CHV LP, CHV PF and CHV Investments, the \"CHV Funds\"). Joshua Phillips, a member of the Issuer's board of directors, is a managing member of CHV GP LLC and CHV III GP LLC, and a limited partner of CHV PF, CHV Investments, CHV GP LLC, and CHV III GP LLC. The securities held by the CHV Funds may be deemed to be beneficially owned by Joshua Phillips. Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":554719,"source":{"system":"sec-edgar","filing":"0001104659-21-094517","document":"tm2122781-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000110465921094517/tm2122781-1_4seq1.xml","form_type":"4"}},{"id":2628381,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2021-07-21T22:01:16.000Z","date":"2021-07-19","kind":"exercise","acquired":true,"shares":24942,"ownership":{"direct":false,"nature":"Held by Catalyst Health Ventures, L.P."},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F6","text":"The Issuer's Series D Preferred Stock is convertible at the option of a holder at any time into shares of the Issuer's Class A Common Stock at a conversion price, as adjusted to reflect the Issuer's recent 1-for-0.481 reverse stock split, of $9.02 per share. The Series D Preferred Stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"CHV GP LLC is the general partner of Catalyst Health Ventures, L.P. (\"CHV LP\") and Catalyst Health Ventures (PF), L.P. (\"CHV PF\"). CHV III GP LLC is the general partner of CHV Investments LLC (\"CHV Investments\") and Catalyst Health Ventures Follow-on Fund, L.P. (\"CHV FO\", together with CHV LP, CHV PF and CHV Investments, the \"CHV Funds\"). Joshua Phillips, a member of the Issuer's board of directors, is a managing member of CHV GP LLC and CHV III GP LLC, and a limited partner of CHV PF, CHV Investments, CHV GP LLC, and CHV III GP LLC. The securities held by the CHV Funds may be deemed to be beneficially owned by Joshua Phillips. Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":388621,"source":{"system":"sec-edgar","filing":"0001104659-21-094517","document":"tm2122781-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000110465921094517/tm2122781-1_4seq1.xml","form_type":"4"}},{"id":2628380,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2021-07-21T22:01:16.000Z","date":"2021-07-19","kind":"exercise","acquired":true,"shares":34030,"ownership":{"direct":false,"nature":"Held by Catalyst Health Ventures, L.P."},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The Issuer's Series B-2 Preferred Stock is convertible at the option of a holder at any time into shares of the Issuer's Class A Common Stock at a conversion price, as adjusted to reflect the Issuer's recent 1-for-0.481 reverse stock split, of $8.32 per share. The Series B-2 Preferred Stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"CHV GP LLC is the general partner of Catalyst Health Ventures, L.P. (\"CHV LP\") and Catalyst Health Ventures (PF), L.P. (\"CHV PF\"). CHV III GP LLC is the general partner of CHV Investments LLC (\"CHV Investments\") and Catalyst Health Ventures Follow-on Fund, L.P. (\"CHV FO\", together with CHV LP, CHV PF and CHV Investments, the \"CHV Funds\"). Joshua Phillips, a member of the Issuer's board of directors, is a managing member of CHV GP LLC and CHV III GP LLC, and a limited partner of CHV PF, CHV Investments, CHV GP LLC, and CHV III GP LLC. The securities held by the CHV Funds may be deemed to be beneficially owned by Joshua Phillips. Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":363679,"source":{"system":"sec-edgar","filing":"0001104659-21-094517","document":"tm2122781-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000110465921094517/tm2122781-1_4seq1.xml","form_type":"4"}},{"id":2628379,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2021-07-21T22:01:16.000Z","date":"2021-07-19","kind":"exercise","acquired":true,"shares":19240,"ownership":{"direct":false,"nature":"Held by Catalyst Health Ventures, L.P."},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The Issuer's Series B-1 Preferred Stock is convertible at the option of a holder at any time into shares of the Issuer's Class A Common Stock at a conversion price, as adjusted to reflect the Issuer's recent 1-for-0.481 reverse stock split, of $5.20 per share. The Series B-1 Preferred Stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"CHV GP LLC is the general partner of Catalyst Health Ventures, L.P. (\"CHV LP\") and Catalyst Health Ventures (PF), L.P. (\"CHV PF\"). CHV III GP LLC is the general partner of CHV Investments LLC (\"CHV Investments\") and Catalyst Health Ventures Follow-on Fund, L.P. (\"CHV FO\", together with CHV LP, CHV PF and CHV Investments, the \"CHV Funds\"). Joshua Phillips, a member of the Issuer's board of directors, is a managing member of CHV GP LLC and CHV III GP LLC, and a limited partner of CHV PF, CHV Investments, CHV GP LLC, and CHV III GP LLC. The securities held by the CHV Funds may be deemed to be beneficially owned by Joshua Phillips. Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":329649,"source":{"system":"sec-edgar","filing":"0001104659-21-094517","document":"tm2122781-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000110465921094517/tm2122781-1_4seq1.xml","form_type":"4"}},{"id":2628378,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2021-07-21T22:01:16.000Z","date":"2021-07-19","kind":"exercise","acquired":true,"shares":231678,"ownership":{"direct":false,"nature":"Held by Catalyst Health Ventures, L.P."},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The Issuer's Series A-2 Preferred Stock is convertible at the option of a holder at any time into shares of the Issuer's Class A Common Stock at a conversion price, as adjusted to reflect the Issuer's recent 1-for-0.481 reverse stock split, of $5.20 per share. The Series A-2 Preferred Stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"CHV GP LLC is the general partner of Catalyst Health Ventures, L.P. (\"CHV LP\") and Catalyst Health Ventures (PF), L.P. (\"CHV PF\"). CHV III GP LLC is the general partner of CHV Investments LLC (\"CHV Investments\") and Catalyst Health Ventures Follow-on Fund, L.P. (\"CHV FO\", together with CHV LP, CHV PF and CHV Investments, the \"CHV Funds\"). Joshua Phillips, a member of the Issuer's board of directors, is a managing member of CHV GP LLC and CHV III GP LLC, and a limited partner of CHV PF, CHV Investments, CHV GP LLC, and CHV III GP LLC. The securities held by the CHV Funds may be deemed to be beneficially owned by Joshua Phillips. Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":310409,"source":{"system":"sec-edgar","filing":"0001104659-21-094517","document":"tm2122781-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000110465921094517/tm2122781-1_4seq1.xml","form_type":"4"}},{"id":2628377,"issuer":{"id":304,"kind":"organization","name":"SERA PROGNOSTICS, INC.","symbol":"SERA"},"owners":[{"id":30558,"kind":"person","name":"Phillips Joshua","position":1,"cik":"0001871555","reported_name":"Phillips Joshua","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2021-07-21T22:01:16.000Z","date":"2021-07-19","kind":"exercise","acquired":true,"shares":41182,"ownership":{"direct":false,"nature":"Held by Catalyst Health Ventures, L.P."},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Issuer's Series A-1 Preferred Stock is convertible at the option of a holder at any time into shares of the Issuer's Class A Common Stock at a conversion price, as adjusted to reflect the Issuer's recent 1-for-0.481 reverse stock split, of $6.07 per share. The Series A-1 Preferred Stock has no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"CHV GP LLC is the general partner of Catalyst Health Ventures, L.P. (\"CHV LP\") and Catalyst Health Ventures (PF), L.P. (\"CHV PF\"). CHV III GP LLC is the general partner of CHV Investments LLC (\"CHV Investments\") and Catalyst Health Ventures Follow-on Fund, L.P. (\"CHV FO\", together with CHV LP, CHV PF and CHV Investments, the \"CHV Funds\"). Joshua Phillips, a member of the Issuer's board of directors, is a managing member of CHV GP LLC and CHV III GP LLC, and a limited partner of CHV PF, CHV Investments, CHV GP LLC, and CHV III GP LLC. The securities held by the CHV Funds may be deemed to be beneficially owned by Joshua Phillips. Joshua Phillips disclaims beneficial ownership of these securities except to the extent of his pecuniary benefit therein."}],"balance_after":78731,"source":{"system":"sec-edgar","filing":"0001104659-21-094517","document":"tm2122781-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1871555/000110465921094517/tm2122781-1_4seq1.xml","form_type":"4"}}]}