Atay Oguzhan sold BLLN

September 14, 2026 · Form 4 insider transaction

Atay Oguzhan sold 2,531 shares of BillionToOne, Inc. at $100.58 per share, a transaction worth $254.6K. The trade was recorded as open-market sale under a pre-scheduled Rule 10b5-1 plan and disclosed on an SEC Form 4, filed 2 days after the transaction.

Direction
Disposed (sell-side)
Shares
2,531
Price
$100.58
Total value
$254.6K
RoleOfficer, Director
SecurityClass A Common Stock
Transaction codeS: Open-market sale
Transaction dateSeptember 14, 2026
Filing dateSeptember 16, 2026
Shares owned after15,547
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 June 5, 2026.; The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $100.060 to $101.040 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

View the original Form 4 on SEC EDGAR