Tsao David's Form 4 filing
BillionToOne, Inc. (BLLN) · filed Nov 12, 2025
- Accession no.
- 0001193125-25-278138
- Filed
- Nov 12, 2025
- Trade date
- Nov 7, 2025
- Filing delay
- 5 days
- Rule 10b5-1 plan
- Not checked
This filing lists 4 non-derivative transactions and 5 derivative transactions. Open-market purchases total $60.0K. It was filed 5 days after the trade.
Reporting owners
A Form 4 can have several reporting owners, such as a person and a fund they control. Trade tables show the first one.
| Owner | Relationship to the company |
|---|---|
| Tsao DavidCIK 0002087127 | Director, Officer (Chief Technology Officer) |
Non-derivative securities (Table I)
Acquisitions and disposals of common stock and similar shares, one row per line on the filing.
| Trade date | Security | Transaction | Shares | Price | Value | Shares after | Ownership | Flags |
|---|---|---|---|---|---|---|---|---|
| Nov 7, 2025 | Common Stock | JOtherDisposed | −2,325,108 | –F1 | – | 0 | Direct | |
| Nov 7, 2025 | Class A Common Stock | JOtherAcquired | +2,325,108 | –F1 | – | 2,325,108 | Direct | |
| Nov 7, 2025 | Class A Common Stock | JOtherDisposed | −2,325,108 | –F2 | – | 0 | Direct | |
| Nov 7, 2025 | Class A Common Stock | PPurchaseAcquired | +1,000 | $60.00 | +$60,000 | 1,000 | Direct |
Derivative securities (Table II)
Options, warrants, restricted stock units and similar. Shares are the underlying shares; price and value are for the derivative itself, and the holding after is in derivative units.
| Trade date | Security | Transaction | Underlying shares | Unit price | Value | Held after | Ownership | Flags |
|---|---|---|---|---|---|---|---|---|
| Nov 7, 2025 | Class A Common Stock | JOtherAcquired | +2,325,108 | $0.00 | $0 | 2,325,108 | Direct | |
| Nov 7, 2025 | Common Stock | JOtherDisposed | −640,000 | –F1 | – | 0 | Direct | |
| Nov 7, 2025 | Class A Common Stock | JOtherAcquired | +640,000 | –F1 | – | 640,000 | Direct | |
| Nov 7, 2025 | Common Stock | JOtherDisposed | −501,551 | –F1 | – | 0 | Direct | |
| Nov 7, 2025 | Class A Common Stock | JOtherAcquired | +501,551 | –F1 | – | 501,551 | Direct |
Footnotes and remarks
Livermore keeps the footnotes that transaction prices refer to, all footnotes of amendments (Form 4/A) and the filing's remarks. Other footnotes, such as how indirect holdings are held or the details of a trading plan, are only in the original on SEC EDGAR.
- F1
Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was automatically reclassified into one share of Class A common stock immediately prior to the completion of the Issuer's initial public offering of Class A common stock (the "Offering").
Referenced by the price of 2 transactions in Table I and 4 transactions in Table II.
- F2
Following the reclassification of Common Stock into Class A Common Stock, the shares of Class A common stock were exchanged at a 1:1 ratio for shares of Class B common stock in a transaction previously approved by the Issuer's board of directors.
Referenced by the price of 1 transaction in Table I.