Form 4 for BLLN BillionToOne, Inc.
Accepted 2026-06-26 17:20:13 ET · period of report 2026-06-24 · accession 0002088547-26-000004 · 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DT | 2026-06-26 17:20 | 2026-06-24 | BLLN | Sakakibara Shan Riku | Chief Product Off | M - OptEx | $8.65 | +4,000 | 216.0K | +2% | +$34.6K |
| DMT | 2026-06-26 17:20 | 2026-06-24 | BLLN | Sakakibara Shan Riku | Chief Product Off | S - Sale+OE | $110.00 | -8,000 | 208.0K | -4% | -$880.0K |
| DT | 2026-06-26 17:20 | 2026-06-24 | BLLN | Sakakibara Shan Riku | Chief Product Off | M - OptEx | $8.65 | -4,000 | 36.0K | -10% | -$34.6K |
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 | 2026-06-24 | M | A | 4,000 | $8.65 | 216,000 | D | — | — | |
| 2 | Common | Class A Common Stock | 2026-06-24 | S | D | 4,000 | $110.00 | 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. |
| 3 | Common | Class A Common Stock | 2026-06-24 | S | D | 4,000 | $110.00 | 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. |
| 4 | Derivative | Stock Option (right to buy) | 2026-06-24 | M | D | 4,000 | $8.65 | 36,000 | D | $8.65 · — to 2033-01-18 | 4,000 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. |