BLLN insider trades & Congress trades
BillionToOne, Inc.: public insider filings and Congress disclosures, in one place.
Bourse has recorded 14 open-market insider transactions in BillionToOne, Inc. (BLLN) (0 purchases with code P and 14 sales with code S), the most recent on October 15, 2026.
In the last 90 days: 0 purchases by 0 insiders ($0) and 14 sales by 1 ($2.91M).
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 |
|---|---|---|---|---|---|---|---|
| Oct 15, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 900 | $98.43 | $89K | – |
| Oct 15, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 1,861 | $99.84 | $186K | – |
| Oct 15, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 1,276 | $100.60 | $128K | – |
| Oct 15, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 980 | $101.79 | $100K | – |
| Oct 15, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 133 | $102.78 | $14K | – |
| Oct 14, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 3,083 | $98.32 | $303K | – |
| Oct 14, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 100 | $99.00 | $10K | – |
| Oct 14, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 2,667 | $98.00 | $261K | – |
| Oct 12, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 1,961 | $91.57 | $180K | – |
| Oct 12, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 2,553 | $93.05 | $238K | – |
| Oct 12, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 6,763 | $93.65 | $633K | – |
| Oct 12, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 3,869 | $94.61 | $366K | – |
| Oct 12, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 1,521 | $96.39 | $147K | – |
| Oct 12, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 2,667 | $97.61 | $260K | – |
Data as of October 22, 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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