Form 4 Filing for BillionToOne, Inc. - Insider Transaction

Thomas S. Bremner, a director at BillionToOne, Inc., was granted 3,017 restricted stock units (RSUs) of Class A Common Stock on June 10, 2026. These RSUs are subject to a service-based vesting requirement, which will be satisfied on the earlier of the next annual stockholders' meeting or the one-year anniversary of the grant date. Following this transaction, Bremner holds a total of 11,350 shares. The reported transaction code is "A" for acquisition, with a price per share of $0.00, indicating these were likely granted as compensation or an award.