Form 4: BillionToOne CEO Sells Shares
Insider Transaction (Form 4)
Oguzhan Atay, Chairman and CEO and a Director of BillionToOne, Inc., sold 10,999 shares of common stock on September 28, 2026 for $120.64 per share.
Summary
- Option exercise/conversion: acquired 8,333 Class A Common Stock at $2.80 ($23,332) on September 28, 2026; holds 8,333 after (Direct).
- Open-market sale: disposed of 8,333 Class A Common Stock at $120.64 ($1,005,293) on September 28, 2026 (Direct).
- Open-market sale: disposed of 2,666 Class A Common Stock at $120.64 ($321,626) on September 28, 2026; holds 154,502 after (Indirect).
- Option exercise/conversion: disposed of 8,333 Stock Option (right to buy) at $2.80 ($23,332) on September 28, 2026; holds 493,629 after (Direct).
Sentiment
Score: 4
Explanation: StockSavvy.ai views this as a mildly negative but low-conviction signal: an insider sold $1,326,919 of stock under a pre-arranged Rule 10b5-1 plan, which is typically routine.
Insider Transactions
Oguzhan Atay — Director, Officer (Chairman and CEO)
Transaction made under a Rule 10b5-1 trading plan.
| Date | Transaction | Security | Shares | Price | Value | Held After |
|---|---|---|---|---|---|---|
| 2026-09-28 | Option exercise/conversion | Class A Common Stock | 8,333 | $3 | $23.3K | 8,333 |
| 2026-09-28 | Open-market sale | Class A Common Stock | 8,333 | $121 | $1.0M | 0 |
| 2026-09-28 | Open-market sale | Class A Common Stock | 2,666 | $121 | $321.6K | 154,502 |
| 2026-09-28 | Option exercise/conversion | Stock Option (right to buy) | 8,333 | $3 | $23.3K | 493,629 |
Key Dates
| Date | Description |
|---|---|
| 2026-09-28 | Option exercise/conversion (8,333 shares) |
| 2026-09-28 | Open-market sale (8,333 shares) |
| 2026-09-28 | Open-market sale (2,666 shares) |
| 2026-09-28 | Option exercise/conversion (8,333 shares) |
Keywords
insider transaction, Form 4, BLLN, BillionToOne, Inc., bearish, Oguzhan Atay
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