BillionToOne, Inc. (BLLN) Insider Trading -- Recent Executive & Director Transactions
26 insiders reported 679 Form 4 transactions for BillionToOne, Inc. (BLLN) over the past 18 months (most recent 2026-10-07). Recent activity: ten Bosch John Roderick (SVP of Laboratory Operations) Sell 1,417 shares, Tsao David (Chief Technology Officer) Sell 100 shares, ten Bosch John Roderick (SVP of Laboratory Operations) Sell 1,417 shares, Tsao David (Chief Technology Officer) Buy 10,000 shares, Tsao David (Chief Technology Officer) Sell 866 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-10-07 | ten Bosch John Roderick | SVP of Laboratory Operations | Sell | 1,417 | $148,998 |
| 2026-10-07 | Tsao David | Chief Technology Officer | Sell | 100 | $11,009 |
| 2026-10-07 | ten Bosch John Roderick | SVP of Laboratory Operations | Sell | 1,417 | $148,998 |
| 2026-10-07 | Tsao David | Chief Technology Officer | Buy | 10,000 | $28,000 |
| 2026-10-07 | Tsao David | Chief Technology Officer | Sell | 866 | $91,710 |
| 2026-10-07 | Tsao David | Chief Technology Officer | Sell | 1,909 | $204,635 |
| 2026-10-07 | Tsao David | Chief Technology Officer | Sell | 4,284 | $464,356 |
| 2026-10-07 | Tsao David | Chief Technology Officer | Buy | 10,000 | $28,000 |
| 2026-10-07 | Tsao David | Chief Technology Officer | Sell | 20 | $2,202 |
| 2026-10-07 | Tsao David | Chief Technology Officer | Sell | 555 | $58,585 |
| 2026-10-07 | Tsao David | Chief Technology Officer | Sell | 400 | $42,442 |
| 2026-10-07 | Tsao David | Chief Technology Officer | Sell | 2,200 | $236,435 |
| 2026-10-07 | Tsao David | Chief Technology Officer | Sell | 4,916 | $533,554 |
| 2026-10-07 | Tsao David | Chief Technology Officer | Sell | 1,829 | $199,625 |
| 2026-10-07 | Tsao David | Chief Technology Officer | Sell | 2,921 | $318,398 |
| 2026-09-30 | Atay Oguzhan | Chairman and CEO | Buy | 8,333 | $23,332 |
| 2026-09-30 | Atay Oguzhan | Chairman and CEO | Sell | 8,333 | $1.0M |
| 2026-09-30 | Atay Oguzhan | Chairman and CEO | Sell | 2,666 | $321,626 |
| 2026-09-28 | ten Bosch John Roderick | SVP of Laboratory Operations | Sell | 1,416 | $169,920 |
| 2026-09-28 | Tsao David | Chief Technology Officer | Sell | 3,333 | $416,625 |
| 2026-09-28 | Tsao David | Chief Technology Officer | Buy | 3,333 | $9,332 |
| 2026-09-23 | ten Bosch John Roderick | SVP of Laboratory Operations | Sell | 1,416 | $150,960 |
| 2026-09-21 | Lynch Thomas P. | General Counsel, Chief Compliance Officer and Secretary | Buy | 2,920 | $49,990 |
| 2026-09-21 | Lynch Thomas P. | General Counsel, Chief Compliance Officer and Secretary | Buy | 19,384 | $167,672 |
| 2026-09-21 | Lynch Thomas P. | General Counsel, Chief Compliance Officer and Secretary | Buy | 6,968 | $80,480 |
Source: SEC Form 4 filings · as of 2026-10-07