Johnson Nancy JoAnn plan to sell securities of BillionToOne, Inc. under Form 144

Johnson Nancy JoAnn filed Form 144 to notify SEC of plan to sell 801 units of BillionToOne, Inc. securities around 2026-07-01, with aggregate market value of $100,055.90. 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 06/08/2026, sold 3418 units for $339347.28; On 06/09/2026, sold 10582 units for $1063192.55;