BillionToOne, Inc. 090168105 US0901681058 BBG00NR7JXT0 06/10/2026 To elect Oguzhan Atay and Akshay Rai as Class I directors until the annual meeting held in 2029 and until their successors are duly elected and qualified. DIRECTOR ELECTIONS ISSUER 246939 0 FOR 246939 FOR BillionToOne, Inc. 090168105 US0901681058 BBG00NR7JXT0 06/10/2026 To ratify the appointment of PricewaterhouseCoopers LLP as BillionToOne, Inc.’s independent registered public accounting firm for the year ending December 31, 2026. AUDIT-RELATED ISSUER 246939 0 FOR 246939 FOR