Tsao David's Form 4 filing
BillionToOne, Inc. (BLLN) · filed Jul 15, 2026
- Accession no.
- 0002087127-26-000004
- Filed
- Jul 15, 2026, 4:38 PM ET
- Trade date
- Jul 13, 2026
- Filing delay
- 2 days
- Rule 10b5-1 plan
- Checked
This filing lists 12 non-derivative transactions and 2 derivative transactions. Open-market sales total $2.50M. It was filed 2 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 |
|---|---|---|---|---|---|---|---|---|
| Jul 13, 2026 | Class A Common Stock | MOption exerciseAcquired | +10,000 | $2.80 | +$28,000 | 11,000 | Direct | |
| Jul 13, 2026 | Class A Common Stock | MOption exerciseAcquired | +10,000 | $2.80 | +$28,000 | 21,000 | Direct | |
| Jul 13, 2026 | Class A Common Stock | SSaleDisposed | −1,102 | $122.90F2 | −$135,440.76 | 19,898 | Direct | |
| Jul 13, 2026 | Class A Common Stock | SSaleDisposed | −2,477 | $123.84F3 | −$306,760.35 | 17,421 | Direct | |
| Jul 13, 2026 | Class A Common Stock | SSaleDisposed | −2,415 | $124.90F4 | −$301,632.53 | 15,006 | Direct | |
| Jul 13, 2026 | Class A Common Stock | SSaleDisposed | −3,185 | $125.85F5 | −$400,818.87 | 11,821 | Direct | |
| Jul 13, 2026 | Class A Common Stock | SSaleDisposed | −821 | $126.89F6 | −$104,175.05 | 11,000 | Direct | |
| Jul 13, 2026 | Class A Common Stock | SSaleDisposed | −1,138 | $122.84F7 | −$139,795.11 | 9,862 | Direct | |
| Jul 13, 2026 | Class A Common Stock | SSaleDisposed | −2,274 | $123.71F8 | −$281,313.81 | 7,588 | Direct | |
| Jul 13, 2026 | Class A Common Stock | SSaleDisposed | −1,725 | $124.65F9 | −$215,027.81 | 5,863 | Direct | |
| Jul 13, 2026 | Class A Common Stock | SSaleDisposed | −3,835 | $125.76F10 | −$482,285 | 2,028 | Direct | |
| Jul 13, 2026 | Class A Common Stock | SSaleDisposed | −1,028 | $126.90F11 | −$130,448.27 | 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 |
|---|---|---|---|---|---|---|---|---|
| Jul 13, 2026 | Class A Common Stock | MOption exerciseDisposed | −10,000 | $2.80 | −$28,000 | 610,000 | Direct | |
| Jul 13, 2026 | Class A Common Stock | MOption exerciseDisposed | −10,000 | $2.80 | −$28,000 | 600,000 | 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.
- F2
The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $122.420 to $123.3775 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.
Referenced by the price of 1 transaction in Table I.
- F3
The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $123.440 to $124.435 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.
Referenced by the price of 1 transaction in Table I.
- F4
The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $124.450 to $125.4325 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.
Referenced by the price of 1 transaction in Table I.
- F5
The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $125.4525 to $126.450 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.
Referenced by the price of 1 transaction in Table I.
- F6
The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $126.490 to $127.2981 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.
Referenced by the price of 1 transaction in Table I.
- F7
The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $122.185 to $123.105 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.
Referenced by the price of 1 transaction in Table I.
- F8
The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $123.2852 to $124.258 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.
Referenced by the price of 1 transaction in Table I.
- F9
The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $124.290 to $125.240 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.
Referenced by the price of 1 transaction in Table I.
- F10
The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $125.295 to $126.2805 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.
Referenced by the price of 1 transaction in Table I.
- F11
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.
Referenced by the price of 1 transaction in Table I.