BillionToOne, Inc. (BLLN) — insider trading
Health Care · Nasdaq
BillionToOne, Inc. (BLLN) has 78 reported SEC Form 4 insider transactions in our data, including 54 open-market sales among the most recent 78 (latest 2026-07-09).
Recent Form 4 transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-07-09 | Sakakibara Shan Riku | Officer (Chief Product Officer) | Option exercise / conversion (derivative) | 1,354 | $30.78 | $41.7K | Form 4 |
| 2026-07-09 | Sakakibara Shan Riku | Officer (Chief Product Officer) | Option exercise / conversion (derivative) | 1,355 | $30.78 | $41.7K | Form 4 |
| 2026-07-09 | Sakakibara Shan Riku | Officer (Chief Product Officer) | Option exercise / conversion (derivative) | 1,117 | $30.78 | $34.4K | Form 4 |
| 2026-07-09 | Sakakibara Shan Riku | Officer (Chief Product Officer) | Option exercise / conversion (derivative) | 174 | $8.65 | $1.5K | Form 4 |
| 2026-07-09 | Sakakibara Shan Riku | Officer (Chief Product Officer) | Open-market sale | 1,354 | $125.00 | $169.3K | Form 4 |
| 2026-07-09 | Sakakibara Shan Riku | Officer (Chief Product Officer) | Open-market sale | 1,355 | $125.00 | $169.4K | Form 4 |
| 2026-07-09 | Sakakibara Shan Riku | Officer (Chief Product Officer) | Open-market sale | 1,117 | $125.00 | $139.6K | Form 4 |
| 2026-07-09 | Sakakibara Shan Riku | Officer (Chief Product Officer) | Open-market sale | 174 | $125.00 | $21.8K | Form 4 |
| 2026-07-09 | Sakakibara Shan Riku | Officer (Chief Product Officer) | Open-market sale | 4,000 | $125.00 | $500.0K | Form 4 |
| 2026-07-09 | Sakakibara Shan Riku | Officer (Chief Product Officer) | Option exercise / conversion | 1,354 | $30.78 | $41.7K | Form 4 |
| 2026-07-09 | Sakakibara Shan Riku | Officer (Chief Product Officer) | Option exercise / conversion | 1,355 | $30.78 | $41.7K | Form 4 |
| 2026-07-09 | Sakakibara Shan Riku | Officer (Chief Product Officer) | Option exercise / conversion | 1,117 | $30.78 | $34.4K | Form 4 |
| 2026-07-09 | Sakakibara Shan Riku | Officer (Chief Product Officer) | Option exercise / conversion | 174 | $8.65 | $1.5K | Form 4 |
| 2026-07-09 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Option exercise / conversion (derivative) | 12,500 | $2.80 | $35.0K | Form 4 |
| 2026-07-09 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Open-market sale | 352 | $128.23 | $45.1K | Form 4 |
| 2026-07-09 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Open-market sale | 2,657 | $127.44 | $338.6K | Form 4 |
| 2026-07-09 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Open-market sale | 2,002 | $126.48 | $253.2K | Form 4 |
| 2026-07-09 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Open-market sale | 7,489 | $125.43 | $939.3K | Form 4 |
| 2026-07-09 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Option exercise / conversion | 12,500 | $2.80 | $35.0K | Form 4 |
| 2026-07-06 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Option exercise / conversion (derivative) | 6,250 | $2.80 | $17.5K | Form 4 |
| 2026-07-06 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Option exercise / conversion (derivative) | 20,000 | $2.80 | $56.0K | Form 4 |
| 2026-07-06 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Open-market sale | 50 | $124.74 | $6.2K | Form 4 |
| 2026-07-06 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Open-market sale | 1,221 | $124.04 | $151.5K | Form 4 |
| 2026-07-06 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Open-market sale | 2,324 | $123.25 | $286.4K | Form 4 |
| 2026-07-06 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Open-market sale | 586 | $122.08 | $71.5K | Form 4 |
| 2026-07-06 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Open-market sale | 444 | $120.69 | $53.6K | Form 4 |
| 2026-07-06 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Open-market sale | 591 | $119.67 | $70.7K | Form 4 |
| 2026-07-06 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Open-market sale | 1,034 | $118.81 | $122.8K | Form 4 |
| 2026-07-06 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Open-market sale | 50 | $124.74 | $6.2K | Form 4 |
| 2026-07-06 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Open-market sale | 1,221 | $124.04 | $151.5K | Form 4 |
| 2026-07-06 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Open-market sale | 2,323 | $123.25 | $286.3K | Form 4 |
| 2026-07-06 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Open-market sale | 587 | $122.08 | $71.7K | Form 4 |
| 2026-07-06 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Open-market sale | 444 | $120.69 | $53.6K | Form 4 |
| 2026-07-06 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Open-market sale | 591 | $119.67 | $70.7K | Form 4 |
| 2026-07-06 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Open-market sale | 1,034 | $118.81 | $122.8K | Form 4 |
| 2026-07-06 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Open-market sale | 194 | $124.61 | $24.2K | Form 4 |
| 2026-07-06 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Open-market sale | 1,642 | $123.81 | $203.3K | Form 4 |
| 2026-07-06 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Open-market sale | 1,945 | $123.07 | $239.4K | Form 4 |
| 2026-07-06 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Open-market sale | 349 | $121.84 | $42.5K | Form 4 |
| 2026-07-06 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Open-market sale | 570 | $120.66 | $68.8K | Form 4 |
| 2026-07-06 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Open-market sale | 1,138 | $119.36 | $135.8K | Form 4 |
| 2026-07-06 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Open-market sale | 412 | $118.49 | $48.8K | Form 4 |
| 2026-07-06 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Open-market sale | 622 | $124.61 | $77.5K | Form 4 |
| 2026-07-06 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Open-market sale | 5,253 | $123.81 | $650.4K | Form 4 |
| 2026-07-06 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Open-market sale | 6,223 | $123.07 | $765.9K | Form 4 |
| 2026-07-06 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Open-market sale | 1,115 | $121.84 | $135.8K | Form 4 |
| 2026-07-06 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Open-market sale | 1,828 | $120.66 | $220.6K | Form 4 |
| 2026-07-06 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Open-market sale | 3,639 | $119.37 | $434.4K | Form 4 |
| 2026-07-06 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Open-market sale | 1,320 | $118.49 | $156.4K | Form 4 |
| 2026-07-06 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Option exercise / conversion | 6,250 | $2.80 | $17.5K | Form 4 |
| 2026-07-06 | Atay Oguzhan | Director, Officer (Chairman and CEO) | Option exercise / conversion | 20,000 | $2.80 | $56.0K | Form 4 |
| 2026-07-01 | Johnson Nancy JoAnn | Officer (See Remarks) | Open-market sale | 801 | $124.91 | $100.1K | Form 4 |
| 2026-06-29 | ten Bosch John Roderick | Officer (SVP of Laboratory Operations) | Open-market sale | 1,416 | $120.00 | $169.9K | Form 4 |
| 2026-06-24 | Sakakibara Shan Riku | Officer (Chief Product Officer) | Option exercise / conversion (derivative) | 4,000 | $8.65 | $34.6K | Form 4 |
| 2026-06-24 | Sakakibara Shan Riku | Officer (Chief Product Officer) | Open-market sale | 4,000 | $110.00 | $440.0K | Form 4 |
| 2026-06-24 | Sakakibara Shan Riku | Officer (Chief Product Officer) | Open-market sale | 4,000 | $110.00 | $440.0K | Form 4 |
| 2026-06-24 | Sakakibara Shan Riku | Officer (Chief Product Officer) | Option exercise / conversion | 4,000 | $8.65 | $34.6K | Form 4 |
| 2026-06-15 | Tsao David | Director, Officer (Chief Technology Officer) | Option exercise / conversion (derivative) | 10,000 | $2.80 | $28.0K | Form 4 |
| 2026-06-15 | Tsao David | Director, Officer (Chief Technology Officer) | Option exercise / conversion (derivative) | 10,000 | $2.80 | $28.0K | Form 4 |
| 2026-06-15 | Tsao David | Director, Officer (Chief Technology Officer) | Open-market sale | 563 | $104.32 | $58.7K | Form 4 |
| 2026-06-15 | Tsao David | Director, Officer (Chief Technology Officer) | Open-market sale | 2,398 | $103.63 | $248.5K | Form 4 |
| 2026-06-15 | Tsao David | Director, Officer (Chief Technology Officer) | Open-market sale | 2,978 | $102.60 | $305.5K | Form 4 |
| 2026-06-15 | Tsao David | Director, Officer (Chief Technology Officer) | Open-market sale | 2,461 | $101.37 | $249.5K | Form 4 |
| 2026-06-15 | Tsao David | Director, Officer (Chief Technology Officer) | Open-market sale | 1,000 | $100.05 | $100.1K | Form 4 |
| 2026-06-15 | Tsao David | Director, Officer (Chief Technology Officer) | Open-market sale | 600 | $98.74 | $59.2K | Form 4 |
| 2026-06-15 | Tsao David | Director, Officer (Chief Technology Officer) | Open-market sale | 230 | $104.47 | $24.0K | Form 4 |
| 2026-06-15 | Tsao David | Director, Officer (Chief Technology Officer) | Open-market sale | 2,889 | $103.68 | $299.5K | Form 4 |
| 2026-06-15 | Tsao David | Director, Officer (Chief Technology Officer) | Open-market sale | 2,816 | $102.77 | $289.4K | Form 4 |
| 2026-06-15 | Tsao David | Director, Officer (Chief Technology Officer) | Open-market sale | 2,361 | $101.55 | $239.8K | Form 4 |
| 2026-06-15 | Tsao David | Director, Officer (Chief Technology Officer) | Open-market sale | 1,704 | $100.37 | $171.0K | Form 4 |
| 2026-06-15 | Tsao David | Director, Officer (Chief Technology Officer) | Option exercise / conversion | 10,000 | $2.80 | $28.0K | Form 4 |
| 2026-06-15 | Tsao David | Director, Officer (Chief Technology Officer) | Option exercise / conversion | 10,000 | $2.80 | $28.0K | Form 4 |
| 2026-06-15 | ten Bosch John Roderick | Officer (See Remarks) | Open-market sale | 1,416 | $101.47 | $143.7K | Form 4 |
| 2026-06-15 | ten Bosch John Roderick | Officer (See Remarks) | Open-market sale | 1,416 | $101.47 | $143.7K | Form 4 |
| 2026-06-10 | Pagano Anthony | Director | Grant / award / vesting | 3,017 | $0.00 | $0 | Form 4 |
| 2026-06-10 | Ileri Firat | Director, 10% owner | Grant / award / vesting | 3,017 | $0.00 | $0 | Form 4 |
| 2026-06-10 | KOLLURI KRISHNA KITTU | Director, 10% owner | Grant / award / vesting | 3,017 | $0.00 | $0 | Form 4 |
| 2026-06-10 | Bremner Thomas S | Director | Grant / award / vesting | 3,017 | $0.00 | $0 | Form 4 |
Ask the chat about BLLN's insider activity →
Transaction types are the SEC Form 4 codes: open-market purchases (P) and sales (S) are the only rows that reflect open-market conviction. Awards/vesting (A), option exercises (M/X/C), shares withheld for taxes (F) and gifts (G) are compensation or mechanical, not buying or selling on the open market. Sales may be planned and non-discretionary (e.g. a Rule 10b5-1 plan); open-market buying is not a recommendation to buy. Informational only — not financial advice.
Source: SEC EDGAR Form 3/4/5. See the full company profile: BillionToOne, Inc. (BLLN).
Last updated 2026-07-09 (most recent filing date).
Informational only — NOT financial advice. Insider filings are sourced from SEC EDGAR and shown with their reported dates.