Follow the people · Insider
Oguzhan Atay
Oguzhan Atay files insider transactions with the SEC as a chairman and ceo of BillionToOne (BLLN). We hold 5 disclosed purchases and sales filed since 12 November 2025, 4 of them in the last 90 days.
- Files forBLLN
- Disclosed buys and sells5 in all, 4 in the last 90 days
- Last disclosure7 August 2026
Positions held
1 post we hold — a term names its own dates; a run of filings only says when they filed- Filed 7 November 2025 — 5 August 2026Chairman and CEO · BillionToOne (BLLN)101 Form 4 lines · source: SEC Form 4
Everything they disclosed
101 entries, newest first — one per disclosure report, one per Form 4 line- exercised options over 15,539 shares of BillionToOneSEC Form 47 August 2026Class A Common Stock · traded 5 August 2026 · filed 7 August 2026
- ▼ sold on the open market 15,539 shares of BillionToOneSEC Form 47 August 2026Class A Common Stock · traded 5 August 2026 · filed 7 August 2026
- exercised options over 15,539 shares of BillionToOne (a derivative holding)SEC Form 47 August 2026Stock Option (right to buy) · traded 5 August 2026 · filed 7 August 2026
- exercised options over 20,000 shares of BillionToOneSEC Form 45 August 2026Class A Common Stock · traded 3 August 2026 · filed 5 August 2026
- ▼ sold on the open market 267 shares of BillionToOneSEC Form 45 August 2026Class A Common Stock · traded 3 August 2026 · filed 5 August 2026
- ▼ sold on the open market 84 shares of BillionToOneSEC Form 45 August 2026Class A Common Stock · traded 3 August 2026 · filed 5 August 2026
- ▼ sold on the open market 173 shares of BillionToOneSEC Form 45 August 2026Class A Common Stock · traded 3 August 2026 · filed 5 August 2026
- ▼ sold on the open market 44 shares of BillionToOneSEC Form 45 August 2026Class A Common Stock · traded 3 August 2026 · filed 5 August 2026
- ▼ sold on the open market 1,981 shares of BillionToOneSEC Form 45 August 2026Class A Common Stock · traded 3 August 2026 · filed 5 August 2026
- ▼ sold on the open market 3,124 shares of BillionToOneSEC Form 45 August 2026Class A Common Stock · traded 3 August 2026 · filed 5 August 2026
- ▼ sold on the open market 762 shares of BillionToOneSEC Form 45 August 2026Class A Common Stock · traded 3 August 2026 · filed 5 August 2026
- ▼ sold on the open market 82 shares of BillionToOneSEC Form 45 August 2026Class A Common Stock · traded 3 August 2026 · filed 5 August 2026
- ▼ sold on the open market 84 shares of BillionToOneSEC Form 45 August 2026Class A Common Stock · traded 3 August 2026 · filed 5 August 2026
- ▼ sold on the open market 173 shares of BillionToOneSEC Form 45 August 2026Class A Common Stock · traded 3 August 2026 · filed 5 August 2026
- exercised options over 6,250 shares of BillionToOneSEC Form 45 August 2026Class A Common Stock · traded 3 August 2026 · filed 5 August 2026
- ▼ sold on the open market 43 shares of BillionToOneSEC Form 45 August 2026Class A Common Stock · traded 3 August 2026 · filed 5 August 2026
- ▼ sold on the open market 1,983 shares of BillionToOneSEC Form 45 August 2026Class A Common Stock · traded 3 August 2026 · filed 5 August 2026
- ▼ sold on the open market 3,125 shares of BillionToOneSEC Form 45 August 2026Class A Common Stock · traded 3 August 2026 · filed 5 August 2026
- ▼ sold on the open market 760 shares of BillionToOneSEC Form 45 August 2026Class A Common Stock · traded 3 August 2026 · filed 5 August 2026
- ▼ sold on the open market 82 shares of BillionToOneSEC Form 45 August 2026Class A Common Stock · traded 3 August 2026 · filed 5 August 2026
- ▼ sold on the open market 6,250 shares of BillionToOneSEC Form 45 August 2026Class A Common Stock · traded 3 August 2026 · filed 5 August 2026
- ▼ sold on the open market 6,250 shares of BillionToOneSEC Form 45 August 2026Class A Common Stock · traded 3 August 2026 · filed 5 August 2026
- exercised options over 20,000 shares of BillionToOne (a derivative holding)SEC Form 45 August 2026Stock Option (right to buy) · traded 3 August 2026 · filed 5 August 2026
- exercised options over 6,250 shares of BillionToOne (a derivative holding)SEC Form 45 August 2026Stock Option (right to buy) · traded 3 August 2026 · filed 5 August 2026
- exercised options over 6,250 shares of BillionToOne (a derivative holding)SEC Form 45 August 2026Stock Option (right to buy) · traded 3 August 2026 · filed 5 August 2026
- exercised options over 6,250 shares of BillionToOneSEC Form 45 August 2026Class A Common Stock · traded 3 August 2026 · filed 5 August 2026
- ▼ sold on the open market 269 shares of BillionToOneSEC Form 45 August 2026Class A Common Stock · traded 3 August 2026 · filed 5 August 2026
- ▼ sold on the open market 555 shares of BillionToOneSEC Form 45 August 2026Class A Common Stock · traded 3 August 2026 · filed 5 August 2026
- ▼ sold on the open market 135 shares of BillionToOneSEC Form 45 August 2026Class A Common Stock · traded 3 August 2026 · filed 5 August 2026
- ▼ sold on the open market 6,354 shares of BillionToOneSEC Form 45 August 2026Class A Common Stock · traded 3 August 2026 · filed 5 August 2026
- ▼ sold on the open market 9,989 shares of BillionToOneSEC Form 45 August 2026Class A Common Stock · traded 3 August 2026 · filed 5 August 2026
- ▼ sold on the open market 2,431 shares of BillionToOneSEC Form 45 August 2026Class A Common Stock · traded 3 August 2026 · filed 5 August 2026
- exercised options over 12,500 shares of BillionToOneSEC Form 413 July 2026Class A Common Stock · traded 9 July 2026 · filed 13 July 2026
- ▼ sold on the open market 7,489 shares of BillionToOneSEC Form 413 July 2026Class A Common Stock · traded 9 July 2026 · filed 13 July 2026
- ▼ sold on the open market 2,002 shares of BillionToOneSEC Form 413 July 2026Class A Common Stock · traded 9 July 2026 · filed 13 July 2026
- ▼ sold on the open market 2,657 shares of BillionToOneSEC Form 413 July 2026Class A Common Stock · traded 9 July 2026 · filed 13 July 2026
- ▼ sold on the open market 352 shares of BillionToOneSEC Form 413 July 2026Class A Common Stock · traded 9 July 2026 · filed 13 July 2026
- exercised options over 12,500 shares of BillionToOne (a derivative holding)SEC Form 413 July 2026Stock Option (right to buy) · traded 9 July 2026 · filed 13 July 2026
- exercised options over 20,000 shares of BillionToOneSEC Form 48 July 2026Class A Common Stock · traded 6 July 2026 · filed 8 July 2026
- ▼ sold on the open market 412 shares of BillionToOneSEC Form 48 July 2026Class A Common Stock · traded 6 July 2026 · filed 8 July 2026
- ▼ sold on the open market 1,138 shares of BillionToOneSEC Form 48 July 2026Class A Common Stock · traded 6 July 2026 · filed 8 July 2026
- ▼ sold on the open market 570 shares of BillionToOneSEC Form 48 July 2026Class A Common Stock · traded 6 July 2026 · filed 8 July 2026
- ▼ sold on the open market 349 shares of BillionToOneSEC Form 48 July 2026Class A Common Stock · traded 6 July 2026 · filed 8 July 2026
- ▼ sold on the open market 1,945 shares of BillionToOneSEC Form 48 July 2026Class A Common Stock · traded 6 July 2026 · filed 8 July 2026
- ▼ sold on the open market 1,642 shares of BillionToOneSEC Form 48 July 2026Class A Common Stock · traded 6 July 2026 · filed 8 July 2026
- ▼ sold on the open market 194 shares of BillionToOneSEC Form 48 July 2026Class A Common Stock · traded 6 July 2026 · filed 8 July 2026
- ▼ sold on the open market 1,034 shares of BillionToOneSEC Form 48 July 2026Class A Common Stock · traded 6 July 2026 · filed 8 July 2026
- ▼ sold on the open market 591 shares of BillionToOneSEC Form 48 July 2026Class A Common Stock · traded 6 July 2026 · filed 8 July 2026
- ▼ sold on the open market 444 shares of BillionToOneSEC Form 48 July 2026Class A Common Stock · traded 6 July 2026 · filed 8 July 2026
- exercised options over 6,250 shares of BillionToOneSEC Form 48 July 2026Class A Common Stock · traded 6 July 2026 · filed 8 July 2026
- ▼ sold on the open market 587 shares of BillionToOneSEC Form 48 July 2026Class A Common Stock · traded 6 July 2026 · filed 8 July 2026
- ▼ sold on the open market 2,323 shares of BillionToOneSEC Form 48 July 2026Class A Common Stock · traded 6 July 2026 · filed 8 July 2026
- ▼ sold on the open market 1,221 shares of BillionToOneSEC Form 48 July 2026Class A Common Stock · traded 6 July 2026 · filed 8 July 2026
- ▼ sold on the open market 50 shares of BillionToOneSEC Form 48 July 2026Class A Common Stock · traded 6 July 2026 · filed 8 July 2026
- ▼ sold on the open market 1,034 shares of BillionToOneSEC Form 48 July 2026Class A Common Stock · traded 6 July 2026 · filed 8 July 2026
- ▼ sold on the open market 591 shares of BillionToOneSEC Form 48 July 2026Class A Common Stock · traded 6 July 2026 · filed 8 July 2026
- ▼ sold on the open market 444 shares of BillionToOneSEC Form 48 July 2026Class A Common Stock · traded 6 July 2026 · filed 8 July 2026
- ▼ sold on the open market 586 shares of BillionToOneSEC Form 48 July 2026Class A Common Stock · traded 6 July 2026 · filed 8 July 2026
- ▼ sold on the open market 2,324 shares of BillionToOneSEC Form 48 July 2026Class A Common Stock · traded 6 July 2026 · filed 8 July 2026
- ▼ sold on the open market 1,221 shares of BillionToOneSEC Form 48 July 2026Class A Common Stock · traded 6 July 2026 · filed 8 July 2026
- ▼ sold on the open market 1,320 shares of BillionToOneSEC Form 48 July 2026Class A Common Stock · traded 6 July 2026 · filed 8 July 2026
- ▼ sold on the open market 50 shares of BillionToOneSEC Form 48 July 2026Class A Common Stock · traded 6 July 2026 · filed 8 July 2026
- exercised options over 20,000 shares of BillionToOne (a derivative holding)SEC Form 48 July 2026Stock Option (right to buy) · traded 6 July 2026 · filed 8 July 2026
- exercised options over 6,250 shares of BillionToOne (a derivative holding)SEC Form 48 July 2026Stock Option (right to buy) · traded 6 July 2026 · filed 8 July 2026
- ▼ sold on the open market 3,639 shares of BillionToOneSEC Form 48 July 2026Class A Common Stock · traded 6 July 2026 · filed 8 July 2026
- ▼ sold on the open market 1,828 shares of BillionToOneSEC Form 48 July 2026Class A Common Stock · traded 6 July 2026 · filed 8 July 2026
- ▼ sold on the open market 1,115 shares of BillionToOneSEC Form 48 July 2026Class A Common Stock · traded 6 July 2026 · filed 8 July 2026
- ▼ sold on the open market 6,223 shares of BillionToOneSEC Form 48 July 2026Class A Common Stock · traded 6 July 2026 · filed 8 July 2026
- ▼ sold on the open market 5,253 shares of BillionToOneSEC Form 48 July 2026Class A Common Stock · traded 6 July 2026 · filed 8 July 2026
- ▼ sold on the open market 622 shares of BillionToOneSEC Form 48 July 2026Class A Common Stock · traded 6 July 2026 · filed 8 July 2026
- exercised options over 20,000 shares of BillionToOneSEC Form 410 June 2026Class A Common Stock · traded 8 June 2026 · filed 10 June 2026
- ▼ sold on the open market 6,250 shares of BillionToOneSEC Form 410 June 2026Class A Common Stock · traded 8 June 2026 · filed 10 June 2026
- converted 10,000 shares of BillionToOneSEC Form 410 June 2026Class A Common Stock · traded 8 June 2026 · filed 10 June 2026
- gave away 10,000 shares of BillionToOneSEC Form 410 June 2026Class A Common Stock · traded 9 June 2026 · filed 10 June 2026
- ▼ sold on the open market 6,250 shares of BillionToOneSEC Form 410 June 2026Class A Common Stock · traded 8 June 2026 · filed 10 June 2026
- ▼ sold on the open market 6,250 shares of BillionToOneSEC Form 410 June 2026Class A Common Stock · traded 8 June 2026 · filed 10 June 2026
- exercised options over 20,000 shares of BillionToOne (a derivative holding)SEC Form 410 June 2026Stock Option (right to buy) · traded 8 June 2026 · filed 10 June 2026
- exercised options over 6,250 shares of BillionToOne (a derivative holding)SEC Form 410 June 2026Stock Option (right to buy) · traded 8 June 2026 · filed 10 June 2026
- converted 10,000 shares of BillionToOne (a derivative holding)SEC Form 410 June 2026Class B Common Stock · traded 8 June 2026 · filed 10 June 2026
- exercised options over 6,250 shares of BillionToOneSEC Form 410 June 2026Class A Common Stock · traded 8 June 2026 · filed 10 June 2026
- ▼ sold on the open market 79 shares of BillionToOneSEC Form 410 June 2026Class A Common Stock · traded 8 June 2026 · filed 10 June 2026
- ▼ sold on the open market 5,466 shares of BillionToOneSEC Form 410 June 2026Class A Common Stock · traded 8 June 2026 · filed 10 June 2026
- ▼ sold on the open market 1,856 shares of BillionToOneSEC Form 410 June 2026Class A Common Stock · traded 8 June 2026 · filed 10 June 2026
- ▼ sold on the open market 4,372 shares of BillionToOneSEC Form 410 June 2026Class A Common Stock · traded 8 June 2026 · filed 10 June 2026
- ▼ sold on the open market 4,066 shares of BillionToOneSEC Form 410 June 2026Class A Common Stock · traded 8 June 2026 · filed 10 June 2026
- ▼ sold on the open market 3,605 shares of BillionToOneSEC Form 410 June 2026Class A Common Stock · traded 8 June 2026 · filed 10 June 2026
- ▼ sold on the open market 556 shares of BillionToOneSEC Form 410 June 2026Class A Common Stock · traded 8 June 2026 · filed 10 June 2026
- converted 262,434 shares of BillionToOne (a derivative holding)SEC Form 412 November 2025Series A-1 Convertible Preferred Stock · traded 7 November 2025 · filed 12 November 2025
- acquired or disposed of, other 2,227,542 shares of BillionToOne (a derivative holding)SEC Form 412 November 2025Class B Common Stock · traded 7 November 2025 · filed 12 November 2025
- acquired or disposed of, other 640,000 shares of BillionToOne (a derivative holding)SEC Form 412 November 2025Stock Option (right to buy) · traded 7 November 2025 · filed 12 November 2025
- acquired or disposed of, other 640,000 shares of BillionToOne (a derivative holding)SEC Form 412 November 2025Stock Option (right to buy) · traded 7 November 2025 · filed 12 November 2025
- acquired or disposed of, other 1,003,102 shares of BillionToOne (a derivative holding)SEC Form 412 November 2025Stock Option (right to buy) · traded 7 November 2025 · filed 12 November 2025
- acquired or disposed of, other 1,003,102 shares of BillionToOne (a derivative holding)SEC Form 412 November 2025Stock Option (right to buy) · traded 7 November 2025 · filed 12 November 2025
- converted 262,434 shares of BillionToOneSEC Form 412 November 2025Common Stock · traded 7 November 2025 · filed 12 November 2025
- acquired or disposed of, other 262,434 shares of BillionToOneSEC Form 412 November 2025Common Stock · traded 7 November 2025 · filed 12 November 2025
- acquired or disposed of, other 1,965,108 shares of BillionToOneSEC Form 412 November 2025Common Stock · traded 7 November 2025 · filed 12 November 2025
- acquired or disposed of, other 200,000 shares of BillionToOneSEC Form 412 November 2025Common Stock · traded 7 November 2025 · filed 12 November 2025
- acquired or disposed of, other 262,434 shares of BillionToOneSEC Form 412 November 2025Class A Common Stock · traded 7 November 2025 · filed 12 November 2025
- acquired or disposed of, other 1,965,108 shares of BillionToOneSEC Form 412 November 2025Class A Common Stock · traded 7 November 2025 · filed 12 November 2025
- acquired or disposed of, other 200,000 shares of BillionToOneSEC Form 412 November 2025Class A Common Stock · traded 7 November 2025 · filed 12 November 2025
- acquired or disposed of, other 2,227,542 shares of BillionToOneSEC Form 412 November 2025Class A Common Stock · traded 7 November 2025 · filed 12 November 2025
Positions come from the unitedstates/congress-legislators roster, the Office of Government Ethics and the SEC’s Form 4 index. Every disclosed line names its own source and links the document the government published; we print what the filing says and never a price we did not read from it. Headlines and links come from the GDELT Global Knowledge Graph — the story stays with the publisher. The portrait, where we have one, is the public-domain Congressional Bioguide photograph.