Ten Bosch John Roderick plan to sell securities of BillionToOne, Inc. under Form 144

ten Bosch John Roderick filed Form 144 to notify SEC of plan to sell 1416 units of BillionToOne, Inc. securities around 2026-06-29, with aggregate market value of $169,920.00. The total outstanding units is 41442834.0. The amount planned to be sold represents 0.00% of total outstanding units; Recent transactions in past 3 months include: On 06/15/2026, sold 2832 units for $287363.04;