Form 4 for BLLN BillionToOne, Inc.
Accepted 2026-07-13 16:39:18 ET · period of report 2026-07-09 · accession 0002088547-26-000006 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DMT | 2026-07-13 16:39 | 2026-07-09 | BLLN | Sakakibara Shan Riku | Chief Product Off | M - OptEx | $29.82 | +4,000 | 212.0K | +2% | +$119.3K |
| DMT | 2026-07-13 16:39 | 2026-07-09 | BLLN | Sakakibara Shan Riku | Chief Product Off | S - Sale+OE | $125.00 | -8,000 | 204.0K | -4% | -$1.00M |
| DMT | 2026-07-13 16:39 | 2026-07-09 | BLLN | Sakakibara Shan Riku | Chief Product Off | M - OptEx | $29.82 | -4,000 | 61.2K | -6% | -$119.3K |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Class A Common Stock | 2026-07-09 | M | A | 174 | $8.65 | 208,174 | D | — | — | (F1) The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 6, 2026. |
| 2 | Common | Class A Common Stock | 2026-07-09 | M | A | 1,117 | $30.78 | 209,291 | D | — | — | (F1) The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 6, 2026. |
| 3 | Common | Class A Common Stock | 2026-07-09 | M | A | 1,355 | $30.78 | 210,646 | D | — | — | (F1) The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 6, 2026. |
| 4 | Common | Class A Common Stock | 2026-07-09 | M | A | 1,354 | $30.78 | 212,000 | D | — | — | (F1) The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 6, 2026. |
| 5 | Common | Class A Common Stock | 2026-07-09 | S | D | 4,000 | $125.00 | 208,000 | D | — | — | (F1) The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 6, 2026. |
| 6 | Common | Class A Common Stock | 2026-07-09 | S | D | 174 | $125.00 | 207,826 | D | — | — | (F1) The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 6, 2026. |
| 7 | Common | Class A Common Stock | 2026-07-09 | S | D | 1,117 | $125.00 | 206,709 | D | — | — | (F1) The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 6, 2026. |
| 8 | Common | Class A Common Stock | 2026-07-09 | S | D | 1,355 | $125.00 | 205,354 | D | — | — | (F1) The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 6, 2026. |
| 9 | Common | Class A Common Stock | 2026-07-09 | S | D | 1,354 | $125.00 | 204,000 | D | — | — | (F1) The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 6, 2026. |
| 10 | Derivative | Stock Option (right to buy) | 2026-07-09 | M | D | 174 | $8.65 | 35,826 | D | $8.65 · — to 2033-01-18 | 174 Class A Common Stock | (F2) The options are fully vested and exercisable. The terms of the underlying option grant are as previously reported on the Reporting Person's Form 3 filed on November 5, 2025. |
| 11 | Derivative | Stock Option (right to buy) | 2026-07-09 | M | D | 1,117 | $30.78 | 63,883 | D | $30.78 · — to 2035-09-30 | 1,117 Class A Common Stock | (F2) The options are fully vested and exercisable. The terms of the underlying option grant are as previously reported on the Reporting Person's Form 3 filed on November 5, 2025. |
| 12 | Derivative | Stock Option (right to buy) | 2026-07-09 | M | D | 1,355 | $30.78 | 62,528 | D | $30.78 · — to 2035-09-30 | 1,355 Class A Common Stock | (F2) The options are fully vested and exercisable. The terms of the underlying option grant are as previously reported on the Reporting Person's Form 3 filed on November 5, 2025. |
| 13 | Derivative | Stock Option (right to buy) | 2026-07-09 | M | D | 1,354 | $30.78 | 61,174 | D | $30.78 · — to 2035-09-30 | 1,354 Class A Common Stock | (F2) The options are fully vested and exercisable. The terms of the underlying option grant are as previously reported on the Reporting Person's Form 3 filed on November 5, 2025. |