BLLN insider trades & Congress trades
BillionToOne, Inc.: public insider filings and Congress disclosures, in one place.
Bourse has recorded 95 open-market insider transactions in BillionToOne, Inc. (BLLN) (0 purchases with code P and 95 sales with code S), the most recent on November 2, 2026.
In the last 90 days: 0 purchases by 0 insiders ($0) and 94 sales by 4 ($26.9M).
Insider transactions
SEC Form 4, open-market purchases (P) and sales (S) only. Awards, option exercises and tax withholding are excluded. “After” shows the stock’s return over the month following the trade, where available.
| Date | Insider | Role | Type | Shares | Price | Value | After 1M |
|---|---|---|---|---|---|---|---|
| Nov 2, 2026 | ten Bosch John Roderick | SVP of Laboratory Operations | Sell | 1,417 | $113.17 | $160K | – |
| Nov 2, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 1,482 | $107.31 | $159K | – |
| Nov 2, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 4,009 | $108.25 | $434K | – |
| Nov 2, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 5,720 | $109.08 | $624K | – |
| Nov 2, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 3,803 | $110.29 | $419K | – |
| Nov 2, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 1,117 | $110.98 | $124K | – |
| Nov 2, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 536 | $112.44 | $60K | – |
| Nov 2, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 974 | $107.34 | $105K | – |
| Nov 2, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 2,075 | $108.43 | $225K | – |
| Nov 2, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 2,451 | $109.11 | $267K | – |
| Nov 2, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 2,223 | $110.35 | $245K | – |
| Nov 2, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 411 | $111.03 | $46K | – |
| Nov 2, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 200 | $112.39 | $22K | – |
| Nov 2, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 2,667 | $113.17 | $302K | – |
| Nov 2, 2026 | Tsao David | Chief Technology Officer | Sell | 917 | $107.31 | $98K | – |
| Nov 2, 2026 | Tsao David | Chief Technology Officer | Sell | 2,320 | $108.24 | $251K | – |
| Nov 2, 2026 | Tsao David | Chief Technology Officer | Sell | 3,241 | $109.04 | $353K | – |
| Nov 2, 2026 | Tsao David | Chief Technology Officer | Sell | 1,992 | $110.13 | $219K | – |
| Nov 2, 2026 | Tsao David | Chief Technology Officer | Sell | 1,130 | $110.77 | $125K | – |
| Nov 2, 2026 | Tsao David | Chief Technology Officer | Sell | 300 | $112.19 | $34K | – |
| Nov 2, 2026 | Tsao David | Chief Technology Officer | Sell | 100 | $113.17 | $11K | – |
| Nov 2, 2026 | Tsao David | Chief Technology Officer | Sell | 1,063 | $107.33 | $114K | – |
| Nov 2, 2026 | Tsao David | Chief Technology Officer | Sell | 2,450 | $108.39 | $266K | – |
| Nov 2, 2026 | Tsao David | Chief Technology Officer | Sell | 3,234 | $109.15 | $353K | – |
| Nov 2, 2026 | Tsao David | Chief Technology Officer | Sell | 2,389 | $110.31 | $264K | – |
| Nov 2, 2026 | Tsao David | Chief Technology Officer | Sell | 633 | $111.14 | $70K | – |
| Nov 2, 2026 | Tsao David | Chief Technology Officer | Sell | 208 | $112.01 | $23K | – |
| Nov 2, 2026 | Tsao David | Chief Technology Officer | Sell | 23 | $113.17 | $3K | – |
| Oct 28, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 8,333 | $118.00 | $983K | – |
| Oct 28, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 2,667 | $118.00 | $315K | – |
Showing the 30 most recent of 95 transactions.
Data as of November 8, 2026. Public filings only. A purchase or sale by a politician or an insider does not by itself imply any wrongdoing.
New to these filings? Read how to read a Form 4, how Congress trades are disclosed and what insider cluster buying means. Sources and limits are on the Methodology page.
See these filings as they land
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