Form 4 for BLLN BillionToOne, Inc.
Accepted 2026-09-16 18:43:51 ET · period of report 2026-09-14 · accession 0002088549-26-000010 · 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 | 2026-09-16 18:43 | 2026-09-14 | BLLN | Atay Oguzhan | COB, CEO, Dir | M - OptEx | $2.80 | +25.0K | 25.0K | New | +$70.0K |
| DMT | 2026-09-16 18:43 | 2026-09-14 | BLLN | Atay Oguzhan | COB, CEO, Dir | S - Sale+OE | $100.32 | -25.0K | 0 | -100% | -$2.51M |
| DMTI | 2026-09-16 18:43 | 2026-09-14 | BLLN | Atay Oguzhan | COB, CEO, Dir | S - Sale+OE | $98.00 | -5,332 | 157.2K | -3% | -$522.5K |
| DMT | 2026-09-16 18:43 | 2026-09-14 | BLLN | Atay Oguzhan | COB, CEO, Dir | M - OptEx | $2.80 | -25.0K | 502.0K | -5% | -$70.0K |
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 | 2026-09-14 | M | A | 16,666 | $2.80 | 16,666 | 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 June 5, 2026. |
| 2 | Common | Class A Common Stock | 2026-09-14 | M | A | 8,333 | $2.80 | 24,999 | 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 June 5, 2026. |
| 3 | Common | Class A Common Stock | 2026-09-14 | S | D | 4,465 | $98.63 | 20,534 | 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 June 5, 2026. (F2) The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $98.060 to $99.055 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. |
| 4 | Common | Class A Common Stock | 2026-09-14 | S | D | 2,456 | $99.57 | 18,078 | 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 June 5, 2026. (F3) The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $99.060 to $100.055 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. |
| 5 | Common | Class A Common Stock | 2026-09-14 | S | D | 2,531 | $100.58 | 15,547 | 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 June 5, 2026. (F4) The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $100.060 to $101.040 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. |
| 6 | Common | Class A Common Stock | 2026-09-14 | S | D | 7,214 | $101.44 | 8,333 | 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 June 5, 2026. (F5) The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $101.085 to $101.805 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. |
| 7 | Common | Class A Common Stock | 2026-09-14 | S | D | 1,680 | $98.64 | 6,653 | 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 June 5, 2026. (F6) The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $98.140 to $99.010 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. |
| 8 | Common | Class A Common Stock | 2026-09-14 | S | D | 1,500 | $99.57 | 5,153 | 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 June 5, 2026. (F7) The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $99.160 to $100.130 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. |
| 9 | Common | Class A Common Stock | 2026-09-14 | S | D | 2,010 | $100.78 | 3,143 | 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 June 5, 2026. (F8) The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $100.230 to $101.200 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. |
| 10 | Common | Class A Common Stock | 2026-09-14 | S | D | 3,143 | $101.49 | 0 | 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 June 5, 2026. (F9) The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $101.250 to $101.820 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. |
| 11 | Common | Class A Common Stock | 2026-09-14 | S | D | 2,666 | $98.00 | 159,834 | I By spouse | — | — | (F10) The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person's spouse on June 7, 2026. (F11) Represents shares held by the Reporting Person's spouse. |
| 12 | Common | Class A Common Stock | 2026-09-14 | S | D | 2,666 | $98.00 | 157,168 | I By spouse | — | — | (F10) The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person's spouse on June 7, 2026. (F11) Represents shares held by the Reporting Person's spouse. |
| 13 | Derivative | Stock Option (right to buy) | 2026-09-14 | M | D | 16,666 | $2.80 | 510,295 | D | $2.80 · — to 2031-06-07 | 16,666 Class A Common Stock | (F12) The options are fully vested and exercisable. |
| 14 | Derivative | Stock Option (right to buy) | 2026-09-14 | M | D | 8,333 | $2.80 | 501,962 | D | $2.80 · — to 2031-06-07 | 8,333 Class A Common Stock | (F12) The options are fully vested and exercisable. |