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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":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The reported security is directly held by Hummingbird Collective CommV."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"Humming Bird Ventures Management NV is the managing member of Hummingbird Opportunity Fund II CommV, Hummingbird Ventures III CommV, Hummingbird Dragons CommV, Hummingbird Collective CommV, and HB&Q NV (HB&Q COMPARTMENT III) (the Hummingbird Funds) and, as a result, may be deemed to beneficially own shares held by the Hummingbird Funds. Mr. Ileri, Barend Van den Brande, and Lukas Decoster are partners of Hummingbird Ventures Management NV and may be deemed to have shared voting and investment power over the shares held by the Hummingbird Funds. The Reporting Persons disclaim beneficial ownership of these shares except to the extent of their pecuniary interests therein."}],"balance_after":18845,"source":{"system":"sec-edgar","filing":"0001104659-26-005172","document":"tm2531914-3_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2070849/000110465926005172/tm2531914-3_4seq1.xml","form_type":"4"}},{"id":935630,"issuer":{"id":3992,"kind":"organization","name":"BillionToOne, Inc.","symbol":"BLLN"},"owners":[{"id":69165,"kind":"organization","name":"Humming Bird Ventures Management NV","position":1,"cik":"0002099044","reported_name":"Humming Bird Ventures Management NV","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":69166,"kind":"organization","name":"Hummingbird Opportunity Fund II CommV","position":2,"cik":"0002099049","reported_name":"Hummingbird Opportunity Fund II CommV","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":69167,"kind":"organization","name":"Hummingbird Ventures III CommV","position":3,"cik":"0002099047","reported_name":"Hummingbird Ventures III CommV","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":69168,"kind":"person","name":"Hummingbird Dragons CommV","position":4,"cik":"0002099040","reported_name":"Hummingbird Dragons CommV","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":69169,"kind":"person","name":"Hummingbird Collective CommV","position":5,"cik":"0002099041","reported_name":"Hummingbird Collective CommV","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":69170,"kind":"organization","name":"HB&Q NV (HB&Q COMPARTMENT III)","position":6,"cik":"0002099035","reported_name":"HB&Q NV (HB&Q COMPARTMENT III)","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":69171,"kind":"person","name":"Van den Brande Barend","position":7,"cik":"0002099027","reported_name":"Van den Brande Barend","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":69172,"kind":"person","name":"Decoster Lukas","position":8,"cik":"0002099021","reported_name":"Decoster Lukas","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2026-01-21T00:27:56.000Z","date":"2025-11-07","kind":"exercise","planned":false,"acquired":true,"shares":640727,"ownership":{"direct":false,"nature":"See Footnotes"},"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-2 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 D Convertible Preferred Stock."},{"field":"kind","element":"transactionCoding","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":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The reported security is directly held by HB&Q NV (HB&Q COMPARTMENT III)."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"Humming Bird Ventures Management NV is the managing member of Hummingbird Opportunity Fund II CommV, Hummingbird Ventures III CommV, Hummingbird Dragons CommV, Hummingbird Collective CommV, and HB&Q NV (HB&Q COMPARTMENT III) (the Hummingbird Funds) and, as a result, may be deemed to beneficially own shares held by the Hummingbird Funds. Mr. Ileri, Barend Van den Brande, and Lukas Decoster are partners of Hummingbird Ventures Management NV and may be deemed to have shared voting and investment power over the shares held by the Hummingbird Funds. The Reporting Persons disclaim beneficial ownership of these shares except to the extent of their pecuniary interests therein."}],"balance_after":640727,"source":{"system":"sec-edgar","filing":"0001104659-26-005172","document":"tm2531914-3_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2070849/000110465926005172/tm2531914-3_4seq1.xml","form_type":"4"}}]}