Insider buys and sells (Form 4)
BillionToOne, Inc. insiders: buys and sells · BLLN
Directors, officers and 10%+ shareholders must report every purchase and sale of their company's stock to the SEC within two business days. Transactions filed between 2026-09-08 and 2026-10-28. All filings on SEC EDGAR →
- Bought
- $0
- Sold
- $12,699,831
- Buys
- 0
- Sells
- 49
The 49 transactions
| Date | Who | Role | Transaction | Shares | Price | Amount |
|---|---|---|---|---|---|---|
| 2026-10-28 | Atay Oguzhan | Chairman and CEO | sell | 8.333 | 118,00 | $983,294 |
| 2026-10-28 | Atay Oguzhan | Chairman and CEO | sell | 2.667 | 118,00 | $314,706 |
| 2026-10-15 | Atay Oguzhan | Chairman and CEO | sell | 1.861 | 99,844 | $185,809 |
| 2026-10-15 | Atay Oguzhan | Chairman and CEO | sell | 1.276 | 100,60 | $128,369 |
| 2026-10-15 | Atay Oguzhan | Chairman and CEO | sell | 980 | 101,79 | $99,751 |
| 2026-10-15 | Atay Oguzhan | Chairman and CEO | sell | 900 | 98,433 | $88,590 |
| 2026-10-15 | Atay Oguzhan | Chairman and CEO | sell | 133 | 102,78 | $13,669 |
| 2026-10-14 | Atay Oguzhan | Chairman and CEO | sell | 3.083 | 98,32 | $303,120 |
| 2026-10-14 | Atay Oguzhan | Chairman and CEO | sell | 2.667 | 98,00 | $261,366 |
| 2026-10-14 | Atay Oguzhan | Chairman and CEO | sell | 100 | 99,00 | $9,900 |
| 2026-10-12 | Atay Oguzhan | Chairman and CEO | sell | 6.763 | 93,647 | $633,335 |
| 2026-10-12 | Atay Oguzhan | Chairman and CEO | sell | 3.869 | 94,613 | $366,059 |
| 2026-10-12 | Atay Oguzhan | Chairman and CEO | sell | 2.667 | 97,61 | $260,326 |
| 2026-10-12 | Atay Oguzhan | Chairman and CEO | sell | 2.553 | 93,046 | $237,546 |
| 2026-10-12 | Atay Oguzhan | Chairman and CEO | sell | 1.961 | 91,571 | $179,571 |
| 2026-10-12 | Atay Oguzhan | Chairman and CEO | sell | 1.521 | 96,392 | $146,613 |
| 2026-10-05 | Tsao David | Chief Technology Officer | sell | 4.916 | 108,53 | $533,554 |
| 2026-10-05 | Tsao David | Chief Technology Officer | sell | 4.284 | 108,39 | $464,356 |
| 2026-10-05 | Tsao David | Chief Technology Officer | sell | 2.921 | 109,00 | $318,398 |
| 2026-10-05 | Tsao David | Chief Technology Officer | sell | 2.200 | 107,47 | $236,435 |
| 2026-10-05 | Tsao David | Chief Technology Officer | sell | 1.909 | 107,19 | $204,635 |
| 2026-10-05 | Tsao David | Chief Technology Officer | sell | 1.829 | 109,14 | $199,625 |
| 2026-10-05 | Ten Bosch John Roderick | SVP of Laboratory Operations | sell | 1.417 | 105,15 | $148,998 |
| 2026-10-05 | Ten Bosch John Roderick | SVP of Laboratory Operations | sell | 1.417 | 105,15 | $148,998 |
| 2026-10-05 | Tsao David | Chief Technology Officer | sell | 866 | 105,90 | $91,710 |
| 2026-10-05 | Tsao David | Chief Technology Officer | sell | 555 | 105,56 | $58,585 |
| 2026-10-05 | Tsao David | Chief Technology Officer | sell | 400 | 106,10 | $42,442 |
| 2026-10-05 | Tsao David | Chief Technology Officer | sell | 100 | 110,09 | $11,009 |
| 2026-10-05 | Tsao David | Chief Technology Officer | sell | 20 | 110,08 | $2,202 |
| 2026-09-28 | Atay Oguzhan | Chairman and CEO | sell | 8.333 | 120,64 | $1,005,293 |
| 2026-09-28 | Atay Oguzhan | Chairman and CEO | sell | 2.666 | 120,64 | $321,626 |
| 2026-09-24 | Tsao David | Chief Technology Officer | sell | 3.333 | 125,00 | $416,625 |
| 2026-09-24 | Ten Bosch John Roderick | SVP of Laboratory Operations | sell | 1.416 | 120,00 | $169,920 |
| 2026-09-09 | Tsao David | Chief Technology Officer | sell | 10.000 | 100,00 | $1,000,000 |
| 2026-09-09 | Tsao David | Chief Technology Officer | sell | 10.000 | 97,54 | $975,400 |
| 2026-09-09 | Ten Bosch John Roderick | SVP of Laboratory Operations | sell | 1.416 | 97,54 | $138,117 |
| 2026-09-08 | Lynch Thomas P. | See Remarks | sell | 8.285 | 100,12 | $829,517 |
| 2026-09-08 | Lynch Thomas P. | See Remarks | sell | 2.997 | 100,11 | $300,040 |
| 2026-09-08 | Lynch Thomas P. | See Remarks | sell | 2.518 | 100,20 | $252,293 |
| 2026-09-08 | Lynch Thomas P. | See Remarks | sell | 1.944 | 98,966 | $192,390 |
| 2026-09-08 | Lynch Thomas P. | See Remarks | sell | 1.131 | 100,33 | $113,469 |
| 2026-09-08 | Lynch Thomas P. | See Remarks | sell | 775 | 100,83 | $78,142 |
| 2026-09-08 | Lynch Thomas P. | See Remarks | sell | 614 | 98,999 | $60,785 |
| 2026-09-08 | Lynch Thomas P. | See Remarks | sell | 576 | 98,888 | $56,960 |
| 2026-09-08 | Lynch Thomas P. | See Remarks | sell | 385 | 99,223 | $38,201 |
| 2026-09-08 | Lynch Thomas P. | See Remarks | sell | 358 | 100,82 | $36,095 |
| 2026-09-08 | Lynch Thomas P. | See Remarks | sell | 232 | 100,92 | $23,414 |
| 2026-09-08 | Lynch Thomas P. | See Remarks | sell | 147 | 101,41 | $14,907 |
| 2026-09-08 | Lynch Thomas P. | See Remarks | sell | 38 | 96,474 | $3,666 |
How to read these transactions
There are 49 filed transactions for BillionToOne, Inc. (BLLN) between 2026-09-08 and 2026-10-28. They were made by 4 different people. Open-market buys: 0, for $0. Sells: 49, for $12,699,831.
Each transaction comes from a Form 4, the filing the person submits to the SEC. In the table, each row is one transaction: the date, who made it and their role, whether it is a buy or a sell, the number of shares, the declared price per share and the total amount.
Open-market buys are the ones people watch most, because whoever makes them puts in their own money. Sells say less: they often respond to taxes, diversification or sale plans scheduled in advance. A single transaction does not say much either; what people look at is whether they repeat, from how many people and for what amount.
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Public SEC data (EDGAR), Form 4. Open-market buys and sells only: option exercises and stock received as pay are left out. This is not investment advice.
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