Form 4: BillionToOne Executive Sells Shares
Insider Transaction (Form 4)
Thomas P. Lynch, See Remarks of BillionToOne, Inc., sold 35,112 shares of common stock on September 17, 2026.
Summary
- Option exercise/conversion: acquired 19,384 Class A Common Stock at $8.65 ($167,672) on September 17, 2026; holds 20,084 after (Direct).
- Option exercise/conversion: acquired 6,968 Class A Common Stock at $11.55 ($80,480) on September 17, 2026; holds 27,052 after (Direct).
- Option exercise/conversion: acquired 2,920 Class A Common Stock at $17.12 ($49,990) on September 17, 2026; holds 29,972 after (Direct).
- Option exercise/conversion: acquired 5,840 Class A Common Stock at $30.78 ($179,755) on September 17, 2026; holds 35,812 after (Direct).
- Open-market sale: disposed of 19,384 Class A Common Stock at $110.36 ($2,139,193) on September 17, 2026; holds 16,428 after (Direct).
- Open-market sale: disposed of 6,968 Class A Common Stock at $110.30 ($768,561) on September 17, 2026; holds 9,460 after (Direct).
- Open-market sale: disposed of 2,920 Class A Common Stock at $110.31 ($322,100) on September 17, 2026; holds 6,540 after (Direct).
- Open-market sale: disposed of 5,840 Class A Common Stock at $110.29 ($644,112) on September 17, 2026; holds 700 after (Direct).
- Option exercise/conversion: disposed of 19,384 Stock Option (right to buy) at $8.65 ($167,672) on September 17, 2026; holds 48,974 after (Direct).
- Option exercise/conversion: disposed of 6,968 Stock Option (right to buy) at $11.55 ($80,480) on September 17, 2026; holds 4,063 after (Direct).
- Option exercise/conversion: disposed of 2,920 Stock Option (right to buy) at $17.12 ($49,990) on September 17, 2026; holds 5,417 after (Direct).
- Option exercise/conversion: disposed of 5,840 Stock Option (right to buy) at $30.78 ($179,755) on September 17, 2026; holds 30,834 after (Direct).
Sentiment
Score: 4
Explanation: StockSavvy.ai views this as a mildly negative but low-conviction signal: an insider sold $3,873,966 of stock under a pre-arranged Rule 10b5-1 plan, which is typically routine.
Insider Transactions
Thomas P. Lynch — Officer (See Remarks)
Transaction made under a Rule 10b5-1 trading plan.
| Date | Transaction | Security | Shares | Price | Value | Held After |
|---|---|---|---|---|---|---|
| 2026-09-17 | Option exercise/conversion | Class A Common Stock | 19,384 | $9 | $167.7K | 20,084 |
| 2026-09-17 | Option exercise/conversion | Class A Common Stock | 6,968 | $12 | $80.5K | 27,052 |
| 2026-09-17 | Option exercise/conversion | Class A Common Stock | 2,920 | $17 | $50.0K | 29,972 |
| 2026-09-17 | Option exercise/conversion | Class A Common Stock | 5,840 | $31 | $179.8K | 35,812 |
| 2026-09-17 | Open-market sale | Class A Common Stock | 19,384 | $110 | $2.1M | 16,428 |
| 2026-09-17 | Open-market sale | Class A Common Stock | 6,968 | $110 | $768.6K | 9,460 |
| 2026-09-17 | Open-market sale | Class A Common Stock | 2,920 | $110 | $322.1K | 6,540 |
| 2026-09-17 | Open-market sale | Class A Common Stock | 5,840 | $110 | $644.1K | 700 |
| 2026-09-17 | Option exercise/conversion | Stock Option (right to buy) | 19,384 | $9 | $167.7K | 48,974 |
| 2026-09-17 | Option exercise/conversion | Stock Option (right to buy) | 6,968 | $12 | $80.5K | 4,063 |
| 2026-09-17 | Option exercise/conversion | Stock Option (right to buy) | 2,920 | $17 | $50.0K | 5,417 |
| 2026-09-17 | Option exercise/conversion | Stock Option (right to buy) | 5,840 | $31 | $179.8K | 30,834 |
Key Dates
| Date | Description |
|---|---|
| 2026-09-17 | Option exercise/conversion (19,384 shares) |
| 2026-09-17 | Option exercise/conversion (6,968 shares) |
| 2026-09-17 | Option exercise/conversion (2,920 shares) |
| 2026-09-17 | Option exercise/conversion (5,840 shares) |
| 2026-09-17 | Open-market sale (19,384 shares) |
| 2026-09-17 | Open-market sale (6,968 shares) |
| 2026-09-17 | Open-market sale (2,920 shares) |
| 2026-09-17 | Open-market sale (5,840 shares) |
| 2026-09-17 | Option exercise/conversion (19,384 shares) |
| 2026-09-17 | Option exercise/conversion (6,968 shares) |
| 2026-09-17 | Option exercise/conversion (2,920 shares) |
| 2026-09-17 | Option exercise/conversion (5,840 shares) |
Keywords
insider transaction, Form 4, BLLN, BillionToOne, Inc., bearish, Thomas P. Lynch
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