The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
| Date | Insider | Role | Action | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 26, 2026 | Kolluri Krishna Kittu | Director | Other(J) | 6K | — | $0 |
| Aug 26, 2026 | Kolluri Krishna Kittu | Director | Other(J) | 15K | — | $0 |
| Aug 26, 2026 | Kolluri Krishna Kittu | Director | Other(J) | 2K | — | $0 |
| Aug 26, 2026 | Kolluri Krishna Kittu | Director | Other(J) | 6K | — | $0 |
| Aug 26, 2026 | Kolluri Krishna Kittu | Director | Other(J) | 719 | — | $0 |
| Aug 26, 2026 | Kolluri Krishna Kittu | Director | Other(J) | 719 | — | $0 |
| Aug 26, 2026 | Kolluri Krishna Kittu | Director | Other(J) | 11K | — | $0 |
| Aug 26, 2026 | Kolluri Krishna Kittu | Director | Other(J) | 38K | — | $0 |
| Aug 26, 2026 | Kolluri Krishna Kittu | Director | Other(J) | 38K | — | $0 |
| Aug 26, 2026 | Kolluri Krishna Kittu | Director | Other(J) | 271K | — | $0 |
| Aug 26, 2026 | Kolluri Krishna Kittu | Director | Other(J) | 2K | — | $0 |
| Aug 26, 2026 | Kolluri Krishna Kittu | Director | Other(J) | 2K | — | $0 |
| Aug 26, 2026 | Kolluri Krishna Kittu | Director | Other(J) | 24K | — | $0 |
| Aug 26, 2026 | Kolluri Krishna Kittu | Director | Other(J) | 8K | — | $0 |
| Aug 26, 2026 | Kolluri Krishna Kittu | Director | Other(J) | 8K | — | $0 |
| Aug 26, 2026 | Kolluri Krishna Kittu | Director | Other(J) | 130K | — | $0 |
| Aug 25, 2026 | ten Bosch John Roderick | SVP of Laboratory Operations | Sell(S) | 1K | $100.00 | $142K |
| Aug 25, 2026 | Tsao David | Chief Technology Officer, Director | Option exercise(M) | 10K | $2.80 | $28K |
| Aug 25, 2026 | Tsao David | Chief Technology Officer, Director | Sell(S) | 10K | $100.00 | $1.0M |
| Aug 25, 2026 | Tsao David | Chief Technology Officer, Director | Option exercise(M) | 10K | $2.80 | $28K |
| Aug 10, 2026 | Tsao David | Chief Technology Officer, Director | Option exercise(M) | 10K | $2.80 | $28K |
| Aug 10, 2026 | Tsao David | Chief Technology Officer, Director | Sell(S) | 10K | $92.86 | $929K |
| Aug 10, 2026 | Tsao David | Chief Technology Officer, Director | Option exercise(M) | 10K | $2.80 | $28K |
| Aug 10, 2026 | ten Bosch John Roderick | SVP of Laboratory Operations | Sell(S) | 1K | $92.86 | $132K |
| Aug 5, 2026 | Atay Oguzhan | Chairman and CEO, Director | Option exercise(M) | 16K | $2.80 | $44K |
| Aug 5, 2026 | Atay Oguzhan | Chairman and CEO, Director | Sell(S) | 16K | $150.03 | $2.3M |
| Aug 5, 2026 | Atay Oguzhan | Chairman and CEO, Director | Option exercise(M) | 16K | $2.80 | $44K |
| Aug 3, 2026 | Atay Oguzhan | Chairman and CEO, Director | Option exercise(M) | 6K | $2.80 | $18K |
| Aug 3, 2026 | Atay Oguzhan | Chairman and CEO, Director | Option exercise(M) | 6K | $2.80 | $18K |
| Aug 3, 2026 | Atay Oguzhan | Chairman and CEO, Director | Option exercise(M) | 20K | $2.80 | $56K |
| Aug 3, 2026 | Atay Oguzhan | Chairman and CEO, Director | Sell(S) | 6K | $137.37 | $859K |
| Aug 3, 2026 | Atay Oguzhan | Chairman and CEO, Director | Sell(S) | 6K | $137.37 | $859K |
| Aug 3, 2026 | Atay Oguzhan | Chairman and CEO, Director | Sell(S) | 82 | $139.20 | $11K |
| Aug 3, 2026 | Atay Oguzhan | Chairman and CEO, Director | Sell(S) | 760 | $138.09 | $105K |
| Aug 3, 2026 | Atay Oguzhan | Chairman and CEO, Director | Sell(S) | 3K | $137.25 | $429K |
| Aug 3, 2026 | Atay Oguzhan | Chairman and CEO, Director | Sell(S) | 2K | $136.42 | $271K |
| Aug 3, 2026 | Atay Oguzhan | Chairman and CEO, Director | Sell(S) | 43 | $135.41 | $6K |
| Aug 3, 2026 | Atay Oguzhan | Chairman and CEO, Director | Sell(S) | 173 | $133.81 | $23K |
| Aug 3, 2026 | Atay Oguzhan | Chairman and CEO, Director | Sell(S) | 84 | $133.01 | $11K |
| Aug 3, 2026 | Atay Oguzhan | Chairman and CEO, Director | Sell(S) | 82 | $139.21 | $11K |
| Aug 3, 2026 | Atay Oguzhan | Chairman and CEO, Director | Sell(S) | 762 | $138.09 | $105K |
| Aug 3, 2026 | Atay Oguzhan | Chairman and CEO, Director | Sell(S) | 3K | $137.25 | $429K |
| Aug 3, 2026 | Atay Oguzhan | Chairman and CEO, Director | Sell(S) | 2K | $136.42 | $270K |
| Aug 3, 2026 | Atay Oguzhan | Chairman and CEO, Director | Sell(S) | 44 | $135.41 | $6K |
| Aug 3, 2026 | Atay Oguzhan | Chairman and CEO, Director | Sell(S) | 173 | $133.81 | $23K |
| Aug 3, 2026 | Atay Oguzhan | Chairman and CEO, Director | Sell(S) | 84 | $133.00 | $11K |
| Aug 3, 2026 | Atay Oguzhan | Chairman and CEO, Director | Sell(S) | 267 | $139.21 | $37K |
| Aug 3, 2026 | Atay Oguzhan | Chairman and CEO, Director | Sell(S) | 2K | $138.09 | $336K |
| Aug 3, 2026 | Atay Oguzhan | Chairman and CEO, Director | Sell(S) | 10K | $137.25 | $1.4M |
| Aug 3, 2026 | Atay Oguzhan | Chairman and CEO, Director | Sell(S) | 6K | $136.42 | $867K |
| Aug 3, 2026 | Atay Oguzhan | Chairman and CEO, Director | Sell(S) | 135 | $135.42 | $18K |
| Aug 3, 2026 | Atay Oguzhan | Chairman and CEO, Director | Sell(S) | 555 | $133.81 | $74K |
| Aug 3, 2026 | Atay Oguzhan | Chairman and CEO, Director | Sell(S) | 269 | $133.01 | $36K |
| Aug 3, 2026 | Atay Oguzhan | Chairman and CEO, Director | Option exercise(M) | 6K | $2.80 | $18K |
| Aug 3, 2026 | Atay Oguzhan | Chairman and CEO, Director | Option exercise(M) | 6K | $2.80 | $18K |
| Aug 3, 2026 | Atay Oguzhan | Chairman and CEO, Director | Option exercise(M) | 20K | $2.80 | $56K |
| Jul 31, 2026 | Sakakibara Shan Riku | Chief Product Officer | Sell(S) | 4K | $140.21 | $561K |
| Jul 16, 2026 | Johnson Nancy JoAnn | See Remarks | Sell(S) | 2K | $126.98 | $271K |
| Jul 16, 2026 | Johnson Nancy JoAnn | See Remarks | Sell(S) | 6K | $127.89 | $711K |
| Jul 16, 2026 | Johnson Nancy JoAnn | See Remarks | Sell(S) | 6K | $128.96 | $722K |
| Jul 16, 2026 | Johnson Nancy JoAnn | See Remarks | Sell(S) | 906 | $129.78 | $118K |
| Jul 13, 2026 | ten Bosch John Roderick | SVP of Laboratory Operations | Sell(S) | 1K | $125.46 | $178K |
| Jul 13, 2026 | ten Bosch John Roderick | SVP of Laboratory Operations | Sell(S) | 1K | $125.46 | $178K |
| Jul 13, 2026 | ten Bosch John Roderick | SVP of Laboratory Operations | Sell(S) | 1K | $125.46 | $178K |
| Jul 13, 2026 | Tsao David | Chief Technology Officer, Director | Option exercise(M) | 10K | $2.80 | $28K |
| Jul 13, 2026 | Tsao David | Chief Technology Officer, Director | Option exercise(M) | 10K | $2.80 | $28K |
| Jul 13, 2026 | Tsao David | Chief Technology Officer, Director | Sell(S) | 1K | $122.90 | $135K |
| Jul 13, 2026 | Tsao David | Chief Technology Officer, Director | Sell(S) | 2K | $123.84 | $307K |
| Jul 13, 2026 | Tsao David | Chief Technology Officer, Director | Sell(S) | 2K | $124.90 | $302K |
| Jul 13, 2026 | Tsao David | Chief Technology Officer, Director | Sell(S) | 3K | $125.85 | $401K |
| Jul 13, 2026 | Tsao David | Chief Technology Officer, Director | Sell(S) | 821 | $126.89 | $104K |
| Jul 13, 2026 | Tsao David | Chief Technology Officer, Director | Sell(S) | 1K | $122.84 | $140K |
| Jul 13, 2026 | Tsao David | Chief Technology Officer, Director | Sell(S) | 2K | $123.71 | $281K |
| Jul 13, 2026 | Tsao David | Chief Technology Officer, Director | Sell(S) | 2K | $124.65 | $215K |
| Jul 13, 2026 | Tsao David | Chief Technology Officer, Director | Sell(S) | 4K | $125.76 | $482K |
| Jul 13, 2026 | Tsao David | Chief Technology Officer, Director | Sell(S) | 1K | $126.90 | $130K |
| Jul 13, 2026 | Tsao David | Chief Technology Officer, Director | Option exercise(M) | 10K | $2.80 | $28K |
| Jul 13, 2026 | Tsao David | Chief Technology Officer, Director | Option exercise(M) | 10K | $2.80 | $28K |
| Jul 9, 2026 | Atay Oguzhan | Chairman and CEO, Director | Option exercise(M) | 13K | $2.80 | $35K |
| Jul 9, 2026 | Atay Oguzhan | Chairman and CEO, Director | Sell(S) | 7K | $125.43 | $939K |
| Jul 9, 2026 | Atay Oguzhan | Chairman and CEO, Director | Sell(S) | 2K | $126.48 | $253K |
| Jul 9, 2026 | Atay Oguzhan | Chairman and CEO, Director | Sell(S) | 3K | $127.44 | $339K |
| Jul 9, 2026 | Atay Oguzhan | Chairman and CEO, Director | Sell(S) | 352 | $128.23 | $45K |
| Jul 9, 2026 | Atay Oguzhan | Chairman and CEO, Director | Option exercise(M) | 13K | $2.80 | $35K |
| Jul 9, 2026 | Sakakibara Shan Riku | Chief Product Officer | Option exercise(M) | 174 | $8.65 | $2K |
| Jul 9, 2026 | Sakakibara Shan Riku | Chief Product Officer | Option exercise(M) | 1K | $30.78 | $34K |
| Jul 9, 2026 | Sakakibara Shan Riku | Chief Product Officer | Option exercise(M) | 1K | $30.78 | $42K |
| Jul 9, 2026 | Sakakibara Shan Riku | Chief Product Officer | Option exercise(M) | 1K | $30.78 | $42K |
| Jul 9, 2026 | Sakakibara Shan Riku | Chief Product Officer | Sell(S) | 4K | $125.00 | $500K |
| Jul 9, 2026 | Sakakibara Shan Riku | Chief Product Officer | Sell(S) | 174 | $125.00 | $22K |
| Jul 9, 2026 | Sakakibara Shan Riku | Chief Product Officer | Sell(S) | 1K | $125.00 | $140K |
| Jul 9, 2026 | Sakakibara Shan Riku | Chief Product Officer | Sell(S) | 1K | $125.00 | $169K |
| Jul 9, 2026 | Sakakibara Shan Riku | Chief Product Officer | Sell(S) | 1K | $125.00 | $169K |
| Jul 9, 2026 | Sakakibara Shan Riku | Chief Product Officer | Option exercise(M) | 174 | $8.65 | $2K |
| Jul 9, 2026 | Sakakibara Shan Riku | Chief Product Officer | Option exercise(M) | 1K | $30.78 | $34K |
| Jul 9, 2026 | Sakakibara Shan Riku | Chief Product Officer | Option exercise(M) | 1K | $30.78 | $42K |
| Jul 9, 2026 | Sakakibara Shan Riku | Chief Product Officer | Option exercise(M) | 1K | $30.78 | $42K |
| Jul 6, 2026 | Atay Oguzhan | Chairman and CEO, Director | Option exercise(M) | 20K | $2.80 | $56K |
| Jul 6, 2026 | Atay Oguzhan | Chairman and CEO, Director | Option exercise(M) | 6K | $2.80 | $18K |
| Jul 6, 2026 | Atay Oguzhan | Chairman and CEO, Director | Sell(S) | 1K | $118.49 | $156K |
Insider transactions sourced from SEC EDGAR Form 4 filings, normalized within minutes of acceptance. "Buy"/"Sell" mark open-market transactions (codes P/S), the tradeable signal. Awards, option exercises and tax-withholding are shown with their raw code. All data is public domain.
Issuer: BillionToOne, Inc., SEC CIK 0002070849. The symbol on a Form 4 is typed by the filer, so this page follows the issuer with the newest filing under BLLN and shows every filing by that issuer.
Coverage: Form 4 filings indexed 2006-01-02 → 2026-09-05. Earlier history is backfilling; this window widens as it deepens.
Programmatic access via the Arkolith API & MCP server (insider.transactions, insider.company).
Connected pages for BLLN