Tsao David sold BLLN

July 13, 2026 · Form 4 insider transaction

Tsao David sold 1,028 shares of BillionToOne, Inc. at $126.90 per share, a transaction worth $130.4K. 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
1,028
Price
$126.90
Total value
$130.4K
InsiderTsao David
RoleOfficer, Director
SecurityClass A Common Stock
Transaction codeS: Open-market sale
Transaction dateJuly 13, 2026
Filing dateJuly 15, 2026
Shares owned after1,000
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.; The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $126.360 to $127.220 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