Tsao David's Form 4 filing
BillionToOne, Inc.BLLN · filed Jun 17, 2026
- Accession no.
- 0002087127-26-000002
- Filed
- Jun 17, 2026
- Trade date
- Jun 15, 2026
- Filing delay
- 2 days
- Rule 10b5-1 plan
- Checked
This filing lists 13 non-derivative transactions and 2 derivative transactions. Open-market sales total $2.05M. 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 |
|---|---|---|---|---|---|---|---|---|
| Jun 15, 2026 | Class A Common Stock | MOption exerciseAcquired | +10,000 | $2.80 | +$28,000 | 11,000 | Direct | |
| Jun 15, 2026 | Class A Common Stock | MOption exerciseAcquired | +10,000 | $2.80 | +$28,000 | 21,000 | Direct | |
| Jun 15, 2026 | Class A Common Stock | SSaleDisposed | −1,704 | $100.37F2 | −$171,030.48 | 19,296 | Direct | |
| Jun 15, 2026 | Class A Common Stock | SSaleDisposed | −2,361 | $101.55F3 | −$239,759.55 | 16,935 | Direct | |
| Jun 15, 2026 | Class A Common Stock | SSaleDisposed | −2,816 | $102.77F4 | −$289,400.32 | 14,119 | Direct | |
| Jun 15, 2026 | Class A Common Stock | SSaleDisposed | −2,889 | $103.68F5 | −$299,531.52 | 11,230 | Direct | |
| Jun 15, 2026 | Class A Common Stock | SSaleDisposed | −230 | $104.47F6 | −$24,028.1 | 11,000 | Direct | |
| Jun 15, 2026 | Class A Common Stock | SSaleDisposed | −600 | $98.74F7 | −$59,244 | 10,400 | Direct | |
| Jun 15, 2026 | Class A Common Stock | SSaleDisposed | −1,000 | $100.05F8 | −$100,050 | 9,400 | Direct | |
| Jun 15, 2026 | Class A Common Stock | SSaleDisposed | −2,461 | $101.37F9 | −$249,471.57 | 6,939 | Direct | |
| Jun 15, 2026 | Class A Common Stock | SSaleDisposed | −2,978 | $102.60F10 | −$305,542.8 | 3,961 | Direct | |
| Jun 15, 2026 | Class A Common Stock | SSaleDisposed | −2,398 | $103.63F11 | −$248,504.74 | 1,563 | Direct | |
| Jun 15, 2026 | Class A Common Stock | SSaleDisposed | −563 | $104.32F12 | −$58,732.16 | 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 |
|---|---|---|---|---|---|---|---|---|
| Jun 15, 2026 | Class A Common Stock | MOption exerciseDisposed | −10,000 | $2.80 | −$28,000 | 630,000 | Direct | |
| Jun 15, 2026 | Class A Common Stock | MOption exerciseDisposed | −10,000 | $2.80 | −$28,000 | 620,000 | 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 $100.000 to $100.9175 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 $101.120 to $102.020 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 $102.185 to $103.150 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 $103.250 to $104.200 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 $104.360 to $104.610 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 $98.160 to $99.080 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 $99.840 to $100.280 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 $100.860 to $101.800 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 $101.980 to $102.970 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 $103.140 to $104.130 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.
- F12
The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $104.160 to $104.540 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.