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Neotribe Partners SPV I BTO, LLC (\"NTP SPV I\") is the managing member of NT SPV I. Kolluri is the managing member of NTP SPV I and therefore may be deemed to have voting and dispositive power over the shares held by NT SPV I. 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Kolluri is the managing member of NTIP I and therefore may be deemed to have voting and dispositive power over the shares held by NTIP I. Kolluri disclaims beneficial ownership of the shares held by NTIP I except to the extent of his pecuniary interest therein."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001104659-26-060132","document":"tm2614487-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1847146/000110465926060132/tm2614487-2_4seq1.xml","form_type":"4"}},{"id":781178,"issuer":{"id":3992,"kind":"organization","name":"BillionToOne, Inc.","symbol":"BLLN"},"owners":[{"id":39372,"kind":"organization","name":"NeoTribe Ventures I, L.P.","position":1,"cik":"0001696926","reported_name":"NeoTribe Ventures I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39373,"kind":"organization","name":"Neotribe Ignite Fund I, L.P.","position":2,"cik":"0001847148","reported_name":"Neotribe Ignite Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39374,"kind":"organization","name":"Neotribe SPV I BTO, LLC","position":3,"cik":"0001914071","reported_name":"Neotribe SPV I BTO, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39375,"kind":"organization","name":"NeoTribe Associates I, L.P.","position":4,"cik":"0001696927","reported_name":"NeoTribe Associates I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39376,"kind":"organization","name":"Neotribe Ignite Partners I, LLC","position":5,"cik":"0001847146","reported_name":"Neotribe Ignite Partners I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39377,"kind":"organization","name":"Neotribe Partners SPV I BTO, LLC","position":6,"cik":"0001914068","reported_name":"Neotribe Partners SPV I BTO, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39378,"kind":"organization","name":"NeoTribe Partners I, LLC","position":7,"cik":"0001696925","reported_name":"NeoTribe Partners I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-05-13T18:23:25.000Z","date":"2026-05-11","kind":"other","planned":false,"acquired":true,"shares":7980,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"The shares were obtained pursuant to a pro-rata, in-kind distribution from NTIF I, for no additional consideration."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The reported security is directly held by NTIP I. Kolluri is the managing member of NTIP I and therefore may be deemed to have voting and dispositive power over the shares held by NTIP I. Kolluri disclaims beneficial ownership of the shares held by NTIP I except to the extent of his pecuniary interest therein."}],"balance_after":7980,"source":{"system":"sec-edgar","filing":"0001104659-26-060132","document":"tm2614487-2_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1847146/000110465926060132/tm2614487-2_4seq1.xml","form_type":"4"}},{"id":781177,"issuer":{"id":3992,"kind":"organization","name":"BillionToOne, Inc.","symbol":"BLLN"},"owners":[{"id":39372,"kind":"organization","name":"NeoTribe Ventures I, L.P.","position":1,"cik":"0001696926","reported_name":"NeoTribe Ventures I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39373,"kind":"organization","name":"Neotribe Ignite Fund I, L.P.","position":2,"cik":"0001847148","reported_name":"Neotribe Ignite Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39374,"kind":"organization","name":"Neotribe SPV I BTO, LLC","position":3,"cik":"0001914071","reported_name":"Neotribe SPV I BTO, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39375,"kind":"organization","name":"NeoTribe Associates I, L.P.","position":4,"cik":"0001696927","reported_name":"NeoTribe Associates I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39376,"kind":"organization","name":"Neotribe Ignite Partners I, LLC","position":5,"cik":"0001847146","reported_name":"Neotribe Ignite Partners I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39377,"kind":"organization","name":"Neotribe Partners SPV I BTO, LLC","position":6,"cik":"0001914068","reported_name":"Neotribe Partners SPV I BTO, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39378,"kind":"organization","name":"NeoTribe Partners I, LLC","position":7,"cik":"0001696925","reported_name":"NeoTribe Partners I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2026-05-13T18:23:25.000Z","date":"2026-05-11","kind":"other","planned":false,"acquired":false,"shares":129780,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents a pro-rata, in-kind distribution by Neotribe Ignite Fund I, L.P. 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The shares have no expiration date."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The reported security converted into the Issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the Issuer's initial public offering of Class A common stock (the \"Offering\") without payment of further consideration. The shares have no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The reported security converted into the Issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the Issuer's initial public offering of Class A common stock (the \"Offering\") without payment of further consideration. 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Kolluri disclaims beneficial ownership of the shares held by NTV I and NTA I except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F11","text":"Consists of 307,955 shares held of record by NTV I for itself and 12,408 shares held of record by NTV I as nominee for NTA I."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":320363},"source":{"system":"sec-edgar","filing":"0001104659-25-109456","document":"tm2530854-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":15,"url":"https://www.sec.gov/Archives/edgar/data/1847146/000110465925109456/tm2530854-1_4seq1.xml","form_type":"4"}},{"id":1004077,"issuer":{"id":3992,"kind":"organization","name":"BillionToOne, Inc.","symbol":"BLLN"},"owners":[{"id":39372,"kind":"organization","name":"NeoTribe Ventures I, L.P.","position":1,"cik":"0001696926","reported_name":"NeoTribe Ventures I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39373,"kind":"organization","name":"Neotribe Ignite Fund I, L.P.","position":2,"cik":"0001847148","reported_name":"Neotribe Ignite Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39374,"kind":"organization","name":"Neotribe SPV I BTO, LLC","position":3,"cik":"0001914071","reported_name":"Neotribe SPV I BTO, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39375,"kind":"organization","name":"NeoTribe Associates I, L.P.","position":4,"cik":"0001696927","reported_name":"NeoTribe Associates I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39376,"kind":"organization","name":"Neotribe Ignite Partners I, LLC","position":5,"cik":"0001847146","reported_name":"Neotribe Ignite Partners I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39377,"kind":"organization","name":"Neotribe Partners SPV I BTO, LLC","position":6,"cik":"0001914068","reported_name":"Neotribe Partners SPV I BTO, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39378,"kind":"organization","name":"NeoTribe Partners I, LLC","position":7,"cik":"0001696925","reported_name":"NeoTribe Partners I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A-6 Convertible Preferred Stock","published_at":"2025-11-11T02:36:19.000Z","date":"2025-11-07","kind":"exercise","planned":false,"acquired":false,"shares":2318482,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The reported security converted into the Issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the Issuer's initial public offering of Class A common stock (the \"Offering\") without payment of further consideration. The shares have no expiration date."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The reported security converted into the Issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the Issuer's initial public offering of Class A common stock (the \"Offering\") without payment of further consideration. The shares have no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The reported security converted into the Issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the Issuer's initial public offering of Class A common stock (the \"Offering\") without payment of further consideration. The shares have no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The reported security converted into the Issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the Issuer's initial public offering of Class A common stock (the \"Offering\") without payment of further consideration. The shares have no expiration date."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F5","text":"The reported security is directly held by NeoTribe Ventures I, L.P. (\"NTV I\"), for itself and as nominee for NeoTribe Associates I, L.P. (\"NTA I\"). NeoTribe Partners I, LLC (\"NTP I\") is the general partner of NTV I and NTA I. Kolluri is the managing member of NTP I and therefore may be deemed to hold voting and dispositive power over the shares held by NTV I and NTA I. Kolluri disclaims beneficial ownership of the shares held by NTV I and NTA I except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F10","text":"Consists of 2,228,682 shares held of record by NTV I for itself and 89,800 shares held of record by NTV I as nominee for NTA I."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":2318482},"source":{"system":"sec-edgar","filing":"0001104659-25-109456","document":"tm2530854-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":14,"url":"https://www.sec.gov/Archives/edgar/data/1847146/000110465925109456/tm2530854-1_4seq1.xml","form_type":"4"}},{"id":1004076,"issuer":{"id":3992,"kind":"organization","name":"BillionToOne, Inc.","symbol":"BLLN"},"owners":[{"id":39372,"kind":"organization","name":"NeoTribe Ventures I, L.P.","position":1,"cik":"0001696926","reported_name":"NeoTribe Ventures I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39373,"kind":"organization","name":"Neotribe Ignite Fund I, L.P.","position":2,"cik":"0001847148","reported_name":"Neotribe Ignite Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39374,"kind":"organization","name":"Neotribe SPV I BTO, LLC","position":3,"cik":"0001914071","reported_name":"Neotribe SPV I BTO, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39375,"kind":"organization","name":"NeoTribe Associates I, L.P.","position":4,"cik":"0001696927","reported_name":"NeoTribe Associates I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39376,"kind":"organization","name":"Neotribe Ignite Partners I, LLC","position":5,"cik":"0001847146","reported_name":"Neotribe Ignite Partners I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39377,"kind":"organization","name":"Neotribe Partners SPV I BTO, LLC","position":6,"cik":"0001914068","reported_name":"Neotribe Partners SPV I BTO, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39378,"kind":"organization","name":"NeoTribe Partners I, LLC","position":7,"cik":"0001696925","reported_name":"NeoTribe Partners I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A-3 Convertible Preferred Stock","published_at":"2025-11-11T02:36:19.000Z","date":"2025-11-07","kind":"exercise","planned":false,"acquired":false,"shares":19985,"ownership":{"direct":false,"nature":"See Footnotes"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The reported security converted into the Issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the Issuer's initial public offering of Class A common stock (the \"Offering\") without payment of further consideration. The shares have no expiration date."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The reported security converted into the Issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the Issuer's initial public offering of Class A common stock (the \"Offering\") without payment of further consideration. The shares have no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The reported security converted into the Issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the Issuer's initial public offering of Class A common stock (the \"Offering\") without payment of further consideration. The shares have no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The reported security converted into the Issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the Issuer's initial public offering of Class A common stock (the \"Offering\") without payment of further consideration. The shares have no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"The reported security is directly held by NeoTribe Ventures I, L.P. (\"NTV I\"), for itself and as nominee for NeoTribe Associates I, L.P. (\"NTA I\"). NeoTribe Partners I, LLC (\"NTP I\") is the general partner of NTV I and NTA I. Kolluri is the managing member of NTP I and therefore may be deemed to hold voting and dispositive power over the shares held by NTV I and NTA I. Kolluri disclaims beneficial ownership of the shares held by NTV I and NTA I except to the extent of his pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"Consists of 19,211 shares held of record by NTV I for itself and 774 shares held of record by NTV I as nominee for NTA I."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":19985},"source":{"system":"sec-edgar","filing":"0001104659-25-109456","document":"tm2530854-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1847146/000110465925109456/tm2530854-1_4seq1.xml","form_type":"4"}},{"id":1004075,"issuer":{"id":3992,"kind":"organization","name":"BillionToOne, Inc.","symbol":"BLLN"},"owners":[{"id":39372,"kind":"organization","name":"NeoTribe Ventures I, L.P.","position":1,"cik":"0001696926","reported_name":"NeoTribe Ventures I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39373,"kind":"organization","name":"Neotribe Ignite Fund I, L.P.","position":2,"cik":"0001847148","reported_name":"Neotribe Ignite Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39374,"kind":"organization","name":"Neotribe SPV I BTO, LLC","position":3,"cik":"0001914071","reported_name":"Neotribe SPV I BTO, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39375,"kind":"organization","name":"NeoTribe Associates I, L.P.","position":4,"cik":"0001696927","reported_name":"NeoTribe Associates I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39376,"kind":"organization","name":"Neotribe Ignite Partners I, LLC","position":5,"cik":"0001847146","reported_name":"Neotribe Ignite Partners I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39377,"kind":"organization","name":"Neotribe Partners SPV I BTO, LLC","position":6,"cik":"0001914068","reported_name":"Neotribe Partners SPV I BTO, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39378,"kind":"organization","name":"NeoTribe Partners I, LLC","position":7,"cik":"0001696925","reported_name":"NeoTribe Partners I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series A-1 Convertible Preferred Stock","published_at":"2025-11-11T02:36:19.000Z","date":"2025-11-07","kind":"exercise","planned":false,"acquired":false,"shares":16746,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The reported security converted into the Issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the Issuer's initial public offering of Class A common stock (the \"Offering\") without payment of further consideration. The shares have no expiration date."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The reported security converted into the Issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the Issuer's initial public offering of Class A common stock (the \"Offering\") without payment of further consideration. The shares have no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The reported security converted into the Issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the Issuer's initial public offering of Class A common stock (the \"Offering\") without payment of further consideration. The shares have no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The reported security converted into the Issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the Issuer's initial public offering of Class A common stock (the \"Offering\") without payment of further consideration. The shares have no expiration date."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F5","text":"The reported security is directly held by NeoTribe Ventures I, L.P. (\"NTV I\"), for itself and as nominee for NeoTribe Associates I, L.P. (\"NTA I\"). NeoTribe Partners I, LLC (\"NTP I\") is the general partner of NTV I and NTA I. Kolluri is the managing member of NTP I and therefore may be deemed to hold voting and dispositive power over the shares held by NTV I and NTA I. Kolluri disclaims beneficial ownership of the shares held by NTV I and NTA I except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F8","text":"Consists of 16,098 shares held of record by NTV I for itself and 648 shares held of record by NTV I as nominee for NTA I."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":16746},"source":{"system":"sec-edgar","filing":"0001104659-25-109456","document":"tm2530854-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1847146/000110465925109456/tm2530854-1_4seq1.xml","form_type":"4"}},{"id":1004074,"issuer":{"id":3992,"kind":"organization","name":"BillionToOne, Inc.","symbol":"BLLN"},"owners":[{"id":39372,"kind":"organization","name":"NeoTribe Ventures I, L.P.","position":1,"cik":"0001696926","reported_name":"NeoTribe Ventures I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39373,"kind":"organization","name":"Neotribe Ignite Fund I, L.P.","position":2,"cik":"0001847148","reported_name":"Neotribe Ignite Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39374,"kind":"organization","name":"Neotribe SPV I BTO, LLC","position":3,"cik":"0001914071","reported_name":"Neotribe SPV I BTO, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39375,"kind":"organization","name":"NeoTribe Associates I, L.P.","position":4,"cik":"0001696927","reported_name":"NeoTribe Associates I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39376,"kind":"organization","name":"Neotribe Ignite Partners I, LLC","position":5,"cik":"0001847146","reported_name":"Neotribe Ignite Partners I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39377,"kind":"organization","name":"Neotribe Partners SPV I BTO, LLC","position":6,"cik":"0001914068","reported_name":"Neotribe Partners SPV I BTO, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39378,"kind":"organization","name":"NeoTribe Partners I, LLC","position":7,"cik":"0001696925","reported_name":"NeoTribe Partners I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series C Convertible Preferred Stock","published_at":"2025-11-11T02:36:19.000Z","date":"2025-11-07","kind":"exercise","planned":false,"acquired":false,"shares":242216,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The reported security converted into the Issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the Issuer's initial public offering of Class A common stock (the \"Offering\") without payment of further consideration. The shares have no expiration date."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The reported security converted into the Issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the Issuer's initial public offering of Class A common stock (the \"Offering\") without payment of further consideration. The shares have no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The reported security converted into the Issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the Issuer's initial public offering of Class A common stock (the \"Offering\") without payment of further consideration. The shares have no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The reported security converted into the Issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the Issuer's initial public offering of Class A common stock (the \"Offering\") without payment of further consideration. The shares have no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The reported security is directly held by Neotribe SPV I BTO, LLC. (\"NT SPV I\"). Neotribe Partners SPV I BTO, LLC (\"NTP SPV I\") is the managing member of NT SPV I. Kolluri is the managing member of NTP SPV I and therefore may be deemed to have voting and dispositive power over the shares held by NT SPV I. Kolluri disclaims beneficial ownership of the shares held by NT SPV I except to the extent of his pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":242216},"source":{"system":"sec-edgar","filing":"0001104659-25-109456","document":"tm2530854-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1847146/000110465925109456/tm2530854-1_4seq1.xml","form_type":"4"}},{"id":1004073,"issuer":{"id":3992,"kind":"organization","name":"BillionToOne, Inc.","symbol":"BLLN"},"owners":[{"id":39372,"kind":"organization","name":"NeoTribe Ventures I, L.P.","position":1,"cik":"0001696926","reported_name":"NeoTribe Ventures I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39373,"kind":"organization","name":"Neotribe Ignite Fund I, L.P.","position":2,"cik":"0001847148","reported_name":"Neotribe Ignite Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39374,"kind":"organization","name":"Neotribe SPV I BTO, LLC","position":3,"cik":"0001914071","reported_name":"Neotribe SPV I BTO, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39375,"kind":"organization","name":"NeoTribe Associates I, L.P.","position":4,"cik":"0001696927","reported_name":"NeoTribe Associates I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39376,"kind":"organization","name":"Neotribe Ignite Partners I, LLC","position":5,"cik":"0001847146","reported_name":"Neotribe Ignite Partners I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39377,"kind":"organization","name":"Neotribe Partners SPV I BTO, LLC","position":6,"cik":"0001914068","reported_name":"Neotribe Partners SPV I BTO, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39378,"kind":"organization","name":"NeoTribe Partners I, LLC","position":7,"cik":"0001696925","reported_name":"NeoTribe Partners I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Series B-1 Convertible Preferred Stock","published_at":"2025-11-11T02:36:19.000Z","date":"2025-11-07","kind":"exercise","planned":false,"acquired":false,"shares":1177800,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The reported security converted into the Issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the Issuer's initial public offering of Class A common stock (the \"Offering\") without payment of further consideration. The shares have no expiration date."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The reported security converted into the Issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the Issuer's initial public offering of Class A common stock (the \"Offering\") without payment of further consideration. The shares have no expiration date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The reported security converted into the Issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the Issuer's initial public offering of Class A common stock (the \"Offering\") without payment of further consideration. The shares have no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The reported security converted into the Issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the Issuer's initial public offering of Class A common stock (the \"Offering\") without payment of further consideration. The shares have no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The reported security is directly held by Neotribe Ignite Fund I, L.P. (\"NTIF I\"). Neotribe Ignite Partners I, LLC (\"NTIP I\") is the general partner of NTIF I. Krishna Kittu Kolluri (\"Kolluri\") is the managing member of NTIP I and therefore may be deemed to have voting and dispositive power over the shares held by NTIF I. Kolluri disclaims beneficial ownership of the shares held by NTIF I except to the extent of his pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":1177800},"source":{"system":"sec-edgar","filing":"0001104659-25-109456","document":"tm2530854-1_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1847146/000110465925109456/tm2530854-1_4seq1.xml","form_type":"4"}},{"id":1004072,"issuer":{"id":3992,"kind":"organization","name":"BillionToOne, Inc.","symbol":"BLLN"},"owners":[{"id":39372,"kind":"organization","name":"NeoTribe Ventures I, L.P.","position":1,"cik":"0001696926","reported_name":"NeoTribe Ventures I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39373,"kind":"organization","name":"Neotribe Ignite Fund I, L.P.","position":2,"cik":"0001847148","reported_name":"Neotribe Ignite Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39374,"kind":"organization","name":"Neotribe SPV I BTO, LLC","position":3,"cik":"0001914071","reported_name":"Neotribe SPV I BTO, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39375,"kind":"organization","name":"NeoTribe Associates I, L.P.","position":4,"cik":"0001696927","reported_name":"NeoTribe Associates I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39376,"kind":"organization","name":"Neotribe Ignite Partners I, LLC","position":5,"cik":"0001847146","reported_name":"Neotribe Ignite Partners I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39377,"kind":"organization","name":"Neotribe Partners SPV I BTO, LLC","position":6,"cik":"0001914068","reported_name":"Neotribe Partners SPV I BTO, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39378,"kind":"organization","name":"NeoTribe Partners I, LLC","position":7,"cik":"0001696925","reported_name":"NeoTribe Partners I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2025-11-11T02:36:19.000Z","date":"2025-11-07","kind":"other","planned":false,"acquired":true,"shares":2819490,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F7","text":"Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Offering."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Offering."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F5","text":"The reported security is directly held by NeoTribe Ventures I, L.P. (\"NTV I\"), for itself and as nominee for NeoTribe Associates I, L.P. (\"NTA I\"). NeoTribe Partners I, LLC (\"NTP I\") is the general partner of NTV I and NTA I. Kolluri is the managing member of NTP I and therefore may be deemed to hold voting and dispositive power over the shares held by NTV I and NTA I. Kolluri disclaims beneficial ownership of the shares held by NTV I and NTA I except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F6","text":"Consists of 2,710,286 shares held of record by NTV I for itself and 109,204 shares held of record by NTV I as nominee for NTA I."}],"balance_after":2819490,"source":{"system":"sec-edgar","filing":"0001104659-25-109456","document":"tm2530854-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1847146/000110465925109456/tm2530854-1_4seq1.xml","form_type":"4"}},{"id":1004071,"issuer":{"id":3992,"kind":"organization","name":"BillionToOne, Inc.","symbol":"BLLN"},"owners":[{"id":39372,"kind":"organization","name":"NeoTribe Ventures I, L.P.","position":1,"cik":"0001696926","reported_name":"NeoTribe Ventures I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39373,"kind":"organization","name":"Neotribe Ignite Fund I, L.P.","position":2,"cik":"0001847148","reported_name":"Neotribe Ignite Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39374,"kind":"organization","name":"Neotribe SPV I BTO, LLC","position":3,"cik":"0001914071","reported_name":"Neotribe SPV I BTO, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39375,"kind":"organization","name":"NeoTribe Associates I, L.P.","position":4,"cik":"0001696927","reported_name":"NeoTribe Associates I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39376,"kind":"organization","name":"Neotribe Ignite Partners I, LLC","position":5,"cik":"0001847146","reported_name":"Neotribe Ignite Partners I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39377,"kind":"organization","name":"Neotribe Partners SPV I BTO, LLC","position":6,"cik":"0001914068","reported_name":"Neotribe Partners SPV I BTO, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39378,"kind":"organization","name":"NeoTribe Partners I, LLC","position":7,"cik":"0001696925","reported_name":"NeoTribe Partners I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2025-11-11T02:36:19.000Z","date":"2025-11-07","kind":"other","planned":false,"acquired":true,"shares":242216,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F7","text":"Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Offering."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Offering."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The reported security is directly held by Neotribe SPV I BTO, LLC. (\"NT SPV I\"). Neotribe Partners SPV I BTO, LLC (\"NTP SPV I\") is the managing member of NT SPV I. Kolluri is the managing member of NTP SPV I and therefore may be deemed to have voting and dispositive power over the shares held by NT SPV I. 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Kolluri disclaims beneficial ownership of the shares held by NTV I and NTA I except to the extent of his pecuniary interest therein."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F6","text":"Consists of 2,710,286 shares held of record by NTV I for itself and 109,204 shares held of record by NTV I as nominee for NTA I."}],"balance_after":2819490,"source":{"system":"sec-edgar","filing":"0001104659-25-109456","document":"tm2530854-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1847146/000110465925109456/tm2530854-1_4seq1.xml","form_type":"4"}},{"id":1004065,"issuer":{"id":3992,"kind":"organization","name":"BillionToOne, Inc.","symbol":"BLLN"},"owners":[{"id":39372,"kind":"organization","name":"NeoTribe Ventures I, L.P.","position":1,"cik":"0001696926","reported_name":"NeoTribe Ventures I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39373,"kind":"organization","name":"Neotribe Ignite Fund I, L.P.","position":2,"cik":"0001847148","reported_name":"Neotribe Ignite Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39374,"kind":"organization","name":"Neotribe SPV I BTO, LLC","position":3,"cik":"0001914071","reported_name":"Neotribe SPV I BTO, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39375,"kind":"organization","name":"NeoTribe Associates I, L.P.","position":4,"cik":"0001696927","reported_name":"NeoTribe Associates I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39376,"kind":"organization","name":"Neotribe Ignite Partners I, LLC","position":5,"cik":"0001847146","reported_name":"Neotribe Ignite Partners I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39377,"kind":"organization","name":"Neotribe Partners SPV I BTO, LLC","position":6,"cik":"0001914068","reported_name":"Neotribe Partners SPV I BTO, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39378,"kind":"organization","name":"NeoTribe Partners I, LLC","position":7,"cik":"0001696925","reported_name":"NeoTribe Partners I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-11-11T02:36:19.000Z","date":"2025-11-07","kind":"exercise","planned":false,"acquired":true,"shares":242216,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The total represents shares received upon conversion of shares of Series A-1 Convertible Preferred Stock, Series A-3 Convertible Preferred Stock, Series A-6 Convertible Preferred Stock, Series B-1 Convertible Preferred Stock, Series B-2 Convertible Preferred Stock, Series C Convertible Preferred Stock and/or Series C-1 Convertible Preferred Stock."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The reported security converted into the Issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the Issuer's initial public offering of Class A common stock (the \"Offering\") without payment of further consideration. The shares have no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The reported security is directly held by Neotribe SPV I BTO, LLC. (\"NT SPV I\"). Neotribe Partners SPV I BTO, LLC (\"NTP SPV I\") is the managing member of NT SPV I. Kolluri is the managing member of NTP SPV I and therefore may be deemed to have voting and dispositive power over the shares held by NT SPV I. Kolluri disclaims beneficial ownership of the shares held by NT SPV I except to the extent of his pecuniary interest therein."}],"balance_after":242216,"source":{"system":"sec-edgar","filing":"0001104659-25-109456","document":"tm2530854-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1847146/000110465925109456/tm2530854-1_4seq1.xml","form_type":"4"}},{"id":1004064,"issuer":{"id":3992,"kind":"organization","name":"BillionToOne, Inc.","symbol":"BLLN"},"owners":[{"id":39372,"kind":"organization","name":"NeoTribe Ventures I, L.P.","position":1,"cik":"0001696926","reported_name":"NeoTribe Ventures I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39373,"kind":"organization","name":"Neotribe Ignite Fund I, L.P.","position":2,"cik":"0001847148","reported_name":"Neotribe Ignite Fund I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39374,"kind":"organization","name":"Neotribe SPV I BTO, LLC","position":3,"cik":"0001914071","reported_name":"Neotribe SPV I BTO, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39375,"kind":"organization","name":"NeoTribe Associates I, L.P.","position":4,"cik":"0001696927","reported_name":"NeoTribe Associates I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39376,"kind":"organization","name":"Neotribe Ignite Partners I, LLC","position":5,"cik":"0001847146","reported_name":"Neotribe Ignite Partners I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39377,"kind":"organization","name":"Neotribe Partners SPV I BTO, LLC","position":6,"cik":"0001914068","reported_name":"Neotribe Partners SPV I BTO, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":39378,"kind":"organization","name":"NeoTribe Partners I, LLC","position":7,"cik":"0001696925","reported_name":"NeoTribe Partners I, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-11-11T02:36:19.000Z","date":"2025-11-07","kind":"exercise","planned":false,"acquired":true,"shares":1177800,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The total represents shares received upon conversion of shares of Series A-1 Convertible Preferred Stock, Series A-3 Convertible Preferred Stock, Series A-6 Convertible Preferred Stock, Series B-1 Convertible Preferred Stock, Series B-2 Convertible Preferred Stock, Series C Convertible Preferred Stock and/or Series C-1 Convertible Preferred Stock."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The reported security converted into the Issuer's Common Stock on a one-for-one basis automatically immediately prior to the closing of the Issuer's initial public offering of Class A common stock (the \"Offering\") without payment of further consideration. The shares have no expiration date."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The reported security is directly held by Neotribe Ignite Fund I, L.P. (\"NTIF I\"). Neotribe Ignite Partners I, LLC (\"NTIP I\") is the general partner of NTIF I. Krishna Kittu Kolluri (\"Kolluri\") is the managing member of NTIP I and therefore may be deemed to have voting and dispositive power over the shares held by NTIF I. Kolluri disclaims beneficial ownership of the shares held by NTIF I except to the extent of his pecuniary interest therein."}],"balance_after":1297799,"source":{"system":"sec-edgar","filing":"0001104659-25-109456","document":"tm2530854-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1847146/000110465925109456/tm2530854-1_4seq1.xml","form_type":"4"}}]}