Atay Oguzhan — SEC Form 4 filings
SEC reporting owner CIK 2088549. 8 Form 4 filings on record with FilingPulse; latest filed 2026-09-16.
Transaction summary — filings shown
Covers all 8 filings on record, filed 2025-11-12 to 2026-09-16. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): none reported.
- Open-market sales (code S, non-derivative): 76 legs across 6 filings — 180,870 shares, $21,626,856 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 42.
- Largest priced transaction: sale of 15,539 shares @ $150.03 ($2,331,352) in BillionToOne, Inc., filed 2026-08-07.
By issuer — same filings
Open-market purchase/sale legs on non-derivative securities, grouped by issuer. Role is as filed on the newest filing for that issuer. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Issuer | Role (as filed) | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|---|
| BillionToOne, Inc. (BLLN) | Chairman and CEO, Director | 8 | — | 76 legs · 180,870 sh · $21,626,856 | 42 |
Form 4 filings — Atay Oguzhan
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-09-16 | 4 | BillionToOne, Inc. (BLLN) | Option exercise (M): 16,666 @ $2.80 · Option exercise (M): 8,333 @ $2.80 · Sale (S): 4,465 @ $98.63 · Sale (S): 2,456 @ $99.57 · Sale (S): 2,531 @ $100.58 · Sale (S): 7,214 @ $101.44 · +8 more | EDGAR |
| 2026-09-10 | 4 | BillionToOne, Inc. (BLLN) | Conversion (C): 20,000 @ $0 · Gift (G): 20,000 @ $0 · Conversion (C): 20,000 (derivative) @ $0 | EDGAR |
| 2026-08-07 | 4 | BillionToOne, Inc. (BLLN) | Option exercise (M): 15,539 @ $2.80 · Sale (S): 15,539 @ $150.03 · Option exercise (M): 15,539 (derivative) @ $2.80 | EDGAR |
| 2026-08-05 | 4 | BillionToOne, Inc. (BLLN) | Option exercise (M): 20,000 @ $2.80 · Option exercise (M): 6,250 @ $2.80 · Option exercise (M): 6,250 @ $2.80 · Sale (S): 269 @ $133.01 · Sale (S): 555 @ $133.81 · Sale (S): 135 @ $135.42 · +23 more | EDGAR |
| 2026-07-13 | 4 | BillionToOne, Inc. (BLLN) | Option exercise (M): 12,500 @ $2.80 · Sale (S): 7,489 @ $125.43 · Sale (S): 2,002 @ $126.48 · Sale (S): 2,657 @ $127.44 · Sale (S): 352 @ $128.23 · Option exercise (M): 12,500 (derivative) @ $2.80 | EDGAR |
| 2026-07-08 | 4 | BillionToOne, Inc. (BLLN) | Option exercise (M): 20,000 @ $2.80 · Option exercise (M): 6,250 @ $2.80 · Sale (S): 1,320 @ $118.49 · Sale (S): 3,639 @ $119.36 · Sale (S): 1,828 @ $120.66 · Sale (S): 1,115 @ $121.84 · +26 more | EDGAR |
| 2026-06-10 | 4 | BillionToOne, Inc. (BLLN) | Option exercise (M): 20,000 @ $2.80 · Option exercise (M): 6,250 @ $2.80 · Sale (S): 79 @ $100.87 · Sale (S): 5,466 @ $94.76 · Sale (S): 1,856 @ $95.59 · Sale (S): 4,372 @ $96.89 · +11 more | EDGAR |
| 2025-11-12 | 4 | BillionToOne, Inc. (BLLN) | Conversion (C): 262,434 · Other (J): 262,434 · Other (J): 1,965,108 · Other (J): 200,000 · Other (J): 262,434 · Other (J): 1,965,108 · +8 more | EDGAR |
FilingPulse's Form 4 archive currently extends back to 2024-01-11 and is expanding backward through EDGAR history — earlier filings by this insider may not be indexed yet. Names and roles are shown as filed.
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