Form 4: BillionToOne Executive Sells Shares
Insider Transaction (Form 4)
Shan Riku Sakakibara, Chief Product Officer of BillionToOne, Inc., sold 8,000 shares of common stock on July 9, 2026 for $125.00 per share.
Summary
- Option exercise/conversion: acquired 174 Class A Common Stock at $8.65 ($1,505) on July 9, 2026; holds 208,174 after (Direct).
- Option exercise/conversion: acquired 1,117 Class A Common Stock at $30.78 ($34,381) on July 9, 2026; holds 209,291 after (Direct).
- Option exercise/conversion: acquired 1,355 Class A Common Stock at $30.78 ($41,707) on July 9, 2026; holds 210,646 after (Direct).
- Option exercise/conversion: acquired 1,354 Class A Common Stock at $30.78 ($41,676) on July 9, 2026; holds 212,000 after (Direct).
- Open-market sale: disposed of 4,000 Class A Common Stock at $125.00 ($500,000) on July 9, 2026; holds 208,000 after (Direct).
- Open-market sale: disposed of 174 Class A Common Stock at $125.00 ($21,750) on July 9, 2026; holds 207,826 after (Direct).
- Open-market sale: disposed of 1,117 Class A Common Stock at $125.00 ($139,625) on July 9, 2026; holds 206,709 after (Direct).
- Open-market sale: disposed of 1,355 Class A Common Stock at $125.00 ($169,375) on July 9, 2026; holds 205,354 after (Direct).
- Open-market sale: disposed of 1,354 Class A Common Stock at $125.00 ($169,250) on July 9, 2026; holds 204,000 after (Direct).
- Option exercise/conversion: disposed of 174 Stock Option (right to buy) at $8.65 ($1,505) on July 9, 2026; holds 35,826 after (Direct).
- Option exercise/conversion: disposed of 1,117 Stock Option (right to buy) at $30.78 ($34,381) on July 9, 2026; holds 63,883 after (Direct).
- Option exercise/conversion: disposed of 1,355 Stock Option (right to buy) at $30.78 ($41,707) on July 9, 2026; holds 62,528 after (Direct).
- Option exercise/conversion: disposed of 1,354 Stock Option (right to buy) at $30.78 ($41,676) on July 9, 2026; holds 61,174 after (Direct).
Sentiment
Score: 4
Explanation: StockSavvy.ai views this as a mildly negative but low-conviction signal: an insider sold $1,000,000 of stock under a pre-arranged Rule 10b5-1 plan, which is typically routine.
Insider Transactions
Shan Riku Sakakibara — Officer (Chief Product Officer)
Transaction made under a Rule 10b5-1 trading plan.
| Date | Transaction | Security | Shares | Price | Value | Held After |
|---|---|---|---|---|---|---|
| 2026-07-09 | Option exercise/conversion | Class A Common Stock | 174 | $9 | $1.5K | 208,174 |
| 2026-07-09 | Option exercise/conversion | Class A Common Stock | 1,117 | $31 | $34.4K | 209,291 |
| 2026-07-09 | Option exercise/conversion | Class A Common Stock | 1,355 | $31 | $41.7K | 210,646 |
| 2026-07-09 | Option exercise/conversion | Class A Common Stock | 1,354 | $31 | $41.7K | 212,000 |
| 2026-07-09 | Open-market sale | Class A Common Stock | 4,000 | $125 | $500.0K | 208,000 |
| 2026-07-09 | Open-market sale | Class A Common Stock | 174 | $125 | $21.8K | 207,826 |
| 2026-07-09 | Open-market sale | Class A Common Stock | 1,117 | $125 | $139.6K | 206,709 |
| 2026-07-09 | Open-market sale | Class A Common Stock | 1,355 | $125 | $169.4K | 205,354 |
| 2026-07-09 | Open-market sale | Class A Common Stock | 1,354 | $125 | $169.3K | 204,000 |
| 2026-07-09 | Option exercise/conversion | Stock Option (right to buy) | 174 | $9 | $1.5K | 35,826 |
| 2026-07-09 | Option exercise/conversion | Stock Option (right to buy) | 1,117 | $31 | $34.4K | 63,883 |
| 2026-07-09 | Option exercise/conversion | Stock Option (right to buy) | 1,355 | $31 | $41.7K | 62,528 |
| 2026-07-09 | Option exercise/conversion | Stock Option (right to buy) | 1,354 | $31 | $41.7K | 61,174 |
Key Dates
| Date | Description |
|---|---|
| 2026-07-09 | Option exercise/conversion (174 shares) |
| 2026-07-09 | Option exercise/conversion (1,117 shares) |
| 2026-07-09 | Option exercise/conversion (1,355 shares) |
| 2026-07-09 | Option exercise/conversion (1,354 shares) |
| 2026-07-09 | Open-market sale (4,000 shares) |
| 2026-07-09 | Open-market sale (174 shares) |
| 2026-07-09 | Open-market sale (1,117 shares) |
| 2026-07-09 | Open-market sale (1,355 shares) |
| 2026-07-09 | Open-market sale (1,354 shares) |
| 2026-07-09 | Option exercise/conversion (174 shares) |
| 2026-07-09 | Option exercise/conversion (1,117 shares) |
| 2026-07-09 | Option exercise/conversion (1,355 shares) |
| 2026-07-09 | Option exercise/conversion (1,354 shares) |
Keywords
insider transaction, Form 4, BLLN, BillionToOne, Inc., bearish, Shan Riku Sakakibara
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