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Reporting owner

Tsao David

Reporting owner CIK 0002087127 · Chief Technology Officer · Director

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These transactions appear in filings associated with this reporting owner. Jointly reported quantities and amounts are unallocated; they are not this owner's individual purchases or total holdings. Names and roles reflect the relevant filing, and a reporting owner may be a person or an organization.

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Transaction timeline

Who reported an acquisition, and when the transaction occurred.

Reported acquisitions by transaction dateEach row is a reporting owner. Select a marker to open its transaction details. Jointly reported transactions appear for each associated reporting owner, without dividing quantities or amounts.Tsao DavidTsao DavidTsao David · October 5, 2026 · Exercise / conversion · Class A Common StockTsao David · October 5, 2026 · Exercise / conversion · Class A Common StockTsao David · November 7, 2025 · Other acquisition · Stock Option (right to buy)Tsao David · November 7, 2025 · Other acquisition · Stock Option (right to buy)Tsao David · November 7, 2025 · Other acquisition · Class B Common StockTsao David · November 7, 2025 · Purchase · Class A Common StockTsao David · November 7, 2025 · Other acquisition · Class A Common StockNov 7, 2025Oct 5, 2026
PurchaseStock awardGift receivedExercise / conversionConversionOther acquisition

7 dated transactions · 1 of 1 reporting owners shown. Select one owner to focus the chart.

View timeline as a table
Transaction dateCompany / securityReporting ownersAcquisition type
Oct 5, 2026BillionToOne, Inc.Class A Common StockTsao DavidExercise / conversion
Oct 5, 2026BillionToOne, Inc.Class A Common StockTsao DavidExercise / conversion
Nov 7, 2025BillionToOne, Inc.Stock Option (right to buy)Tsao DavidOther acquisition
Nov 7, 2025BillionToOne, Inc.Stock Option (right to buy)Tsao DavidOther acquisition
Nov 7, 2025BillionToOne, Inc.Class B Common StockTsao DavidOther acquisition
Nov 7, 2025BillionToOne, Inc.Class A Common StockTsao DavidPurchase
Nov 7, 2025BillionToOne, Inc.Class A Common StockTsao DavidOther acquisition

Only transactions on this page are shown. Date windows end on the latest transaction date in this sample. Joint filings may appear on more than one row. Sales are not included. Share-price charts use a separate data source.

Transactions in associated filings

Reported insider acquisitions, ordered by filing date, newest first. Currency is shown only when reported.
Filed / transactedCompanyReporting ownersType / securityQuantityPrice / reference valueDetails
Trade: BillionToOne, Inc.BLLN · company listings
Tsao DavidChief Technology Officer · Director
Exercise / conversionClass A Common StockNon-derivative security · Code M10,0002.8Value: 28,000Currency not specifiedView ↗
Trade: BillionToOne, Inc.BLLN · company listings
Tsao DavidChief Technology Officer · Director
Exercise / conversionClass A Common StockNon-derivative security · Code M10,0002.8Value: 28,000Currency not specifiedView ↗
Trade: BillionToOne, Inc.BLLN · company listings
Tsao DavidChief Technology Officer · Director
Other acquisitionStock Option (right to buy)Derivative security · Code J501,551Not reported *Value: Not reportedCurrency not specifiedView ↗
Trade: BillionToOne, Inc.BLLN · company listings
Tsao DavidChief Technology Officer · Director
Other acquisitionStock Option (right to buy)Derivative security · Code J640,000Not reported *Value: Not reportedCurrency not specifiedView ↗
Trade: BillionToOne, Inc.BLLN · company listings
Tsao DavidChief Technology Officer · Director
Other acquisitionClass B Common StockDerivative security · Code J2,325,1080Value: 0Currency not specifiedView ↗
Trade: BillionToOne, Inc.BLLN · company listings
Tsao DavidChief Technology Officer · Director
PurchaseClass A Common StockNon-derivative security · Code P1,00060Value: 60,000Currency not specifiedView ↗
Trade: BillionToOne, Inc.BLLN · company listings
Tsao DavidChief Technology Officer · Director
Other acquisitionClass A Common StockNon-derivative security · Code J2,325,108Not reported *Value: Not reportedCurrency not specifiedView ↗