Atay Oguzhan's Form 4 filing
BillionToOne, Inc. (BLLN) · filed Sep 16, 2026
- Accession no.
- 0002088549-26-000010
- Filed
- Sep 16, 2026, 6:43 PM ET
- Trade date
- Sep 14, 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 $3.03M. 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 |
|---|---|
| Atay OguzhanCIK 0002088549 | Director, Officer (Chairman and CEO) |
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 |
|---|---|---|---|---|---|---|---|---|
| Sep 14, 2026 | Class A Common Stock | MOption exerciseAcquired | +16,666 | $2.80 | +$46,664.8 | 16,666 | Direct | |
| Sep 14, 2026 | Class A Common Stock | MOption exerciseAcquired | +8,333 | $2.80 | +$23,332.4 | 24,999 | Direct | |
| Sep 14, 2026 | Class A Common Stock | SSaleDisposed | −4,465 | $98.63F2 | −$440,389.2 | 20,534 | Direct | |
| Sep 14, 2026 | Class A Common Stock | SSaleDisposed | −2,456 | $99.57F3 | −$244,547.11 | 18,078 | Direct | |
| Sep 14, 2026 | Class A Common Stock | SSaleDisposed | −2,531 | $100.58F4 | −$254,570.26 | 15,547 | Direct | |
| Sep 14, 2026 | Class A Common Stock | SSaleDisposed | −7,214 | $101.44F5 | −$731,793.21 | 8,333 | Direct | |
| Sep 14, 2026 | Class A Common Stock | SSaleDisposed | −1,680 | $98.64F6 | −$165,708.14 | 6,653 | Direct | |
| Sep 14, 2026 | Class A Common Stock | SSaleDisposed | −1,500 | $99.57F7 | −$149,352.45 | 5,153 | Direct | |
| Sep 14, 2026 | Class A Common Stock | SSaleDisposed | −2,010 | $100.78F8 | −$202,558.96 | 3,143 | Direct | |
| Sep 14, 2026 | Class A Common Stock | SSaleDisposed | −3,143 | $101.49F9 | −$318,989.04 | 0 | Direct | |
| Sep 14, 2026 | Class A Common Stock | SSaleDisposed | −2,666 | $98.00 | −$261,268 | 159,834 | Indirect | |
| Sep 14, 2026 | Class A Common Stock | SSaleDisposed | −2,666 | $98.00 | −$261,268 | 157,168 | Indirect |
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 |
|---|---|---|---|---|---|---|---|---|
| Sep 14, 2026 | Class A Common Stock | MOption exerciseDisposed | −16,666 | $2.80 | −$46,664.8 | 510,295 | Direct | |
| Sep 14, 2026 | Class A Common Stock | MOption exerciseDisposed | −8,333 | $2.80 | −$23,332.4 | 501,962 | 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 $98.060 to $99.055 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 $99.060 to $100.055 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 $100.060 to $101.040 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 $101.085 to $101.805 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 $98.140 to $99.010 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 $99.160 to $100.130 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.
- F8
The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $100.230 to $101.200 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.
- F9
The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $101.250 to $101.820 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.