Atay Oguzhan insider trades
Atay Oguzhan has filed 9 Form 4s with the SEC that we hold, all for BillionToOne, Inc. (BLLN), as Chairman and CEO, Director. Across all of them we count 0 purchases worth $0 and 70 sales worth $20.9M reported on Form 4. In the last 12 months: 0 purchases ($0) and 70 sales ($20.9M). The largest single trade was a sale of 15,539 shares of BillionToOne, Inc. worth $2.3M, dated 2026-08-05. Of 11 sales filed since we began reading the 10b5-1 checkbox, 11 (100%) were marked as made under a 10b5-1 trading plan. The first filing on our record is dated 2025-11-12 and the latest 2026-09-30.
BillionToOne, Inc. (BLLN)
Chairman and CEO, Director · 9 filings · 70 purchases and sales
| Trade date | Code | Shares | Value as filed | Filed |
|---|---|---|---|---|
| 2026-06-08 | S, sale reported on Form 4 | 79 | $8.0K | 2026-06-10 |
| 2026-06-08 | S, sale reported on Form 4 | 5,466 | $518.0K | 2026-06-10 |
| 2026-06-08 | S, sale reported on Form 4 | 1,856 | $177.4K | 2026-06-10 |
| 2026-06-08 | S, sale reported on Form 4 | 4,372 | $423.6K | 2026-06-10 |
| 2026-06-08 | S, sale reported on Form 4 | 6,250 | $625.0K | 2026-06-10 |
| 2026-06-08 | S, sale reported on Form 4 | 3,605 | $357.1K | 2026-06-10 |
| 2026-06-08 | S, sale reported on Form 4 | 556 | $55.6K | 2026-06-10 |
| 2026-06-08 | S, sale reported on Form 4 | 6,250 | $602.8K | 2026-06-10 |
| 2026-06-08 | S, sale reported on Form 4 | 4,066 | $399.0K | 2026-06-10 |
| 2026-07-06 | S, sale reported on Form 4 | 1,320 | $156.4K | 2026-07-08 |
| 2026-07-06 | S, sale reported on Form 4 | 3,639 | $434.4K | 2026-07-08 |
| 2026-07-06 | S, sale reported on Form 4 | 1,828 | $220.6K | 2026-07-08 |
| 2026-07-06 | S, sale reported on Form 4 | 1,115 | $135.8K | 2026-07-08 |
| 2026-07-06 | S, sale reported on Form 4 | 6,223 | $765.9K | 2026-07-08 |
| 2026-07-06 | S, sale reported on Form 4 | 5,253 | $650.4K | 2026-07-08 |
| 2026-07-06 | S, sale reported on Form 4 | 622 | $77.5K | 2026-07-08 |
| 2026-07-06 | S, sale reported on Form 4 | 412 | $48.8K | 2026-07-08 |
| 2026-07-06 | S, sale reported on Form 4 | 1,138 | $135.8K | 2026-07-08 |
| 2026-07-06 | S, sale reported on Form 4 | 570 | $68.8K | 2026-07-08 |
| 2026-07-06 | S, sale reported on Form 4 | 349 | $42.5K | 2026-07-08 |
| 2026-07-06 | S, sale reported on Form 4 | 1,945 | $239.4K | 2026-07-08 |
| 2026-07-06 | S, sale reported on Form 4 | 1,642 | $203.3K | 2026-07-08 |
| 2026-07-06 | S, sale reported on Form 4 | 194 | $24.2K | 2026-07-08 |
| 2026-07-06 | S, sale reported on Form 4 | 1,034 | $122.8K | 2026-07-08 |
| 2026-07-06 | S, sale reported on Form 4 | 591 | $70.7K | 2026-07-08 |
| 2026-07-06 | S, sale reported on Form 4 | 444 | $53.6K | 2026-07-08 |
| 2026-07-06 | S, sale reported on Form 4 | 587 | $71.7K | 2026-07-08 |
| 2026-07-06 | S, sale reported on Form 4 | 2,323 | $286.3K | 2026-07-08 |
| 2026-07-06 | S, sale reported on Form 4 | 1,221 | $151.5K | 2026-07-08 |
| 2026-07-06 | S, sale reported on Form 4 | 50 | $6.2K | 2026-07-08 |
| 2026-07-06 | S, sale reported on Form 4 | 1,034 | $122.8K | 2026-07-08 |
| 2026-07-06 | S, sale reported on Form 4 | 586 | $71.5K | 2026-07-08 |
| 2026-07-06 | S, sale reported on Form 4 | 2,324 | $286.4K | 2026-07-08 |
| 2026-07-09 | S, sale reported on Form 4 | 7,489 | $939.3K | 2026-07-13 |
| 2026-07-09 | S, sale reported on Form 4 | 2,002 | $253.2K | 2026-07-13 |
| 2026-07-09 | S, sale reported on Form 4 | 2,657 | $338.6K | 2026-07-13 |
| 2026-07-09 | S, sale reported on Form 4 | 352 | $45.1K | 2026-07-13 |
| 2026-08-03 | S, sale reported on Form 4 | 269 | $35.8K | 2026-08-05 |
| 2026-08-03 | S, sale reported on Form 4 | 555 | $74.3K | 2026-08-05 |
| 2026-08-03 | S, sale reported on Form 4 | 135 | $18.3K | 2026-08-05 |
| 2026-08-03 | S, sale reported on Form 4 | 6,354 | $866.8K | 2026-08-05 |
| 2026-08-03 | S, sale reported on Form 4 | 9,989 | $1.4M | 2026-08-05 |
| 2026-08-03 | S, sale reported on Form 4 | 2,431 | $335.7K | 2026-08-05 |
| 2026-08-03 | S, sale reported on Form 4 | 267 | $37.2K | 2026-08-05 |
| 2026-08-03 | S, sale reported on Form 4 | 84 | $11.2K | 2026-08-05 |
| 2026-08-03 | S, sale reported on Form 4 | 173 | $23.1K | 2026-08-05 |
| 2026-08-03 | S, sale reported on Form 4 | 44 | $6.0K | 2026-08-05 |
| 2026-08-03 | S, sale reported on Form 4 | 1,981 | $270.3K | 2026-08-05 |
| 2026-08-03 | S, sale reported on Form 4 | 3,124 | $428.8K | 2026-08-05 |
| 2026-08-03 | S, sale reported on Form 4 | 762 | $105.2K | 2026-08-05 |
| 2026-08-03 | S, sale reported on Form 4 | 82 | $11.4K | 2026-08-05 |
| 2026-08-03 | S, sale reported on Form 4 | 84 | $11.2K | 2026-08-05 |
| 2026-08-03 | S, sale reported on Form 4 | 43 | $5.8K | 2026-08-05 |
| 2026-08-03 | S, sale reported on Form 4 | 1,983 | $270.5K | 2026-08-05 |
| 2026-08-03 | S, sale reported on Form 4 | 3,125 | $428.9K | 2026-08-05 |
| 2026-08-03 | S, sale reported on Form 4 | 760 | $104.9K | 2026-08-05 |
| 2026-08-03 | S, sale reported on Form 4 | 82 | $11.4K | 2026-08-05 |
| 2026-08-03 | S, sale reported on Form 4 | 6,250 | $858.6K | 2026-08-05 |
| 2026-08-05 | S, sale reported on Form 4 | 15,539 | $2.3M | 2026-08-07 |
| 2026-09-14 | S, sale reported on Form 4 | 4,465 | $440.4K | 2026-09-16 |
| 2026-09-14 | S, sale reported on Form 4 | 2,456 | $244.5K | 2026-09-16 |
| 2026-09-14 | S, sale reported on Form 4 | 2,531 | $254.6K | 2026-09-16 |
| 2026-09-14 | S, sale reported on Form 4 | 7,214 | $731.8K | 2026-09-16 |
| 2026-09-14 | S, sale reported on Form 4 | 1,680 | $165.7K | 2026-09-16 |
| 2026-09-14 | S, sale reported on Form 4 | 1,500 | $149.4K | 2026-09-16 |
| 2026-09-14 | S, sale reported on Form 4 | 2,010 | $202.6K | 2026-09-16 |
| 2026-09-14 | S, sale reported on Form 4 | 3,143 | $319.0K | 2026-09-16 |
| 2026-09-14 | S, sale reported on Form 4 | 2,666 | $261.3K | 2026-09-16 |
| 2026-09-28 | S, sale reported on Form 4 | 8,333 | $1.0M | 2026-09-30 |
| 2026-09-28 | S, sale reported on Form 4 | 2,666 | $321.6K | 2026-09-30 |
Source
Counted from the Form 4 filings this reporting owner (SEC CIK 2088549) filed on EDGAR. Values are the transaction values as filed. See every filing on EDGAR, or browse insider buying and today's insider purchases.
Source: U.S. Securities and Exchange Commission (EDGAR) and other official
government data · Updated 2026-10-12 ·
For informational purposes only, not investment advice.
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