July 9, 2026 · Form 4 insider transaction
Sakakibara Shan Riku bought 1,117 shares of BillionToOne, Inc. at $30.78 per share, a transaction worth $34.4K. The trade was recorded as option exercise under a pre-scheduled Rule 10b5-1 plan and disclosed on an SEC Form 4, filed 4 days after the transaction.
The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 6, 2026.