Sakakibara Shan Riku bought BLLN
July 9, 2026 · Form 4 insider transaction
Sakakibara Shan Riku bought 1,355 shares of BillionToOne, Inc. at $30.78 per share, a transaction worth $41.7K. 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.
Direction
Acquired (buy-side)
Shares
1,355
Price
$30.78
Total value
$41.7K
InsiderSakakibara Shan Riku
RoleOfficer
CompanyBillionToOne, Inc. (BLLN)
SecurityClass A Common Stock
Transaction codeM: Option exercise
Transaction dateJuly 9, 2026
Filing dateJuly 13, 2026
Shares owned after210,646
OwnershipDirect
10b5-1 planYes
AmendedNo
Footnotes
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.