Form 4 for BLLN BillionToOne, Inc.
Accepted 2026-06-10 20:35:55 ET · period of report 2026-06-08 · accession 0002088549-26-000002 · 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 | 2026-06-10 20:35 | 2026-06-08 | BLLN | Atay Oguzhan | See Remarks, Dir | M - OptEx | $2.80 | +26.2K | 26.2K | New | +$73.5K |
| DMT | 2026-06-10 20:35 | 2026-06-08 | BLLN | Atay Oguzhan | See Remarks, Dir | S - Sale+OE | $97.66 | -26.2K | 0 | -100% | -$2.56M |
| DT | 2026-06-10 20:35 | 2026-06-08 | BLLN | Atay Oguzhan | See Remarks, Dir | C - Cnv Deriv | $0.00 | +10.0K | 10.0K | New | $0 |
| DT | 2026-06-10 20:35 | 2026-06-09 | BLLN | Atay Oguzhan | See Remarks, Dir | G - Gift | $0.00 | -10.0K | 0 | -100% | $0 |
| DMTI | 2026-06-10 20:35 | 2026-06-08 | BLLN | Atay Oguzhan | See Remarks, Dir | S - Sale+OE | $98.22 | -12.5K | 187.5K | -6% | -$1.23M |
| DMT | 2026-06-10 20:35 | 2026-06-08 | BLLN | Atay Oguzhan | See Remarks, Dir | M - OptEx | $2.80 | -26.2K | 613.8K | -4% | -$73.5K |
| DT | 2026-06-10 20:35 | 2026-06-08 | BLLN | Atay Oguzhan | See Remarks, Dir | C - Cnv Deriv | $0.00 | -10.0K | 2.22M | -0.4% | $0 |
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 | 2026-06-08 | M | A | 20,000 | $2.80 | 20,000 | 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. |
| 2 | Common | Class A Common Stock | 2026-06-08 | M | A | 6,250 | $2.80 | 26,250 | 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 | 2026-06-08 | S | D | 79 | $100.87 | 26,171 | 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 | 2026-06-08 | S | D | 5,466 | $94.76 | 20,705 | 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. (F2) The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $94.300 to $95.280 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 | 2026-06-08 | S | D | 1,856 | $95.59 | 18,849 | 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. (F3) The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $95.320 to $96.225 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 | 2026-06-08 | S | D | 4,372 | $96.89 | 14,477 | 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. (F4) The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $96.530 to $97.2113 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 | 2026-06-08 | S | D | 4,066 | $98.12 | 10,411 | 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. (F5) The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $97.560 to $98.5428 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 | 2026-06-08 | S | D | 3,605 | $99.06 | 6,806 | 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. (F6) The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $98.560 to $99.550 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 | 2026-06-08 | S | D | 556 | $99.97 | 6,250 | 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. (F7) The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $99.640 to $100.540 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 | 2026-06-08 | S | D | 6,250 | $100.00 | 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 March 6, 2026. |
| 11 | Common | Class A Common Stock | 2026-06-08 | C | A | 10,000 | $0.00 | 10,000 | D | — | — | (F8) These shares of Class B common stock were converted at a 1:1 ratio for shares of Class A common stock at the option of the holder. (F8) These shares of Class B common stock were converted at a 1:1 ratio for shares of Class A common stock at the option of the holder. |
| 12 | Common | Class A Common Stock | 2026-06-09 | G | D | 10,000 | $0.00 | 0 | D | — | — | |
| 13 | Common | Class A Common Stock | 2026-06-08 | S | D | 6,250 | $96.45 | 193,750 | I By spouse | — | — | (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. (F9) Represents shares held by the Reporting Person's spouse. |
| 14 | Common | Class A Common Stock | 2026-06-08 | S | D | 6,250 | $100.00 | 187,500 | I By spouse | — | — | (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. (F9) Represents shares held by the Reporting Person's spouse. |
| 15 | Derivative | Stock Option (right to buy) | 2026-06-08 | M | D | 20,000 | $2.80 | 620,000 | D | $2.80 · — to 2031-06-07 | 20,000 Class A Common Stock | (F10) The options are fully vested and exercisable. |
| 16 | Derivative | Stock Option (right to buy) | 2026-06-08 | M | D | 6,250 | $2.80 | 613,750 | D | $2.80 · — to 2031-06-07 | 6,250 Class A Common Stock | (F10) The options are fully vested and exercisable. |
| 17 | Derivative | Class B Common Stock | 2026-06-08 | C | D | 10,000 | $0.00 | 2,217,542 | D | — · — to — | 10,000 Class A Common Stock | (F8) These shares of Class B common stock were converted at a 1:1 ratio for shares of Class A common stock at the option of the holder. (F11) Each share of Class B Common Stock is convertible into one share of Class A common stock at the option of the holder. Class B common stock will convert automatically on a one-for-one basis into shares of the Issuer's Class A common stock upon the earliest of (i) seven years from the date of filing of the amended and restated certificate of incorporation, in connection with the Offering and (ii) the date specified by a vote of the holders of Class B common stock representing a majority of the outstanding shares of Class B common stock. (F8) These shares of Class B common stock were converted at a 1:1 ratio for shares of Class A common stock at the option of the holder. (F11) Each share of Class B Common Stock is convertible into one share of Class A common stock at the option of the holder. Class B common stock will convert automatically on a one-for-one basis into shares of the Issuer's Class A common stock upon the earliest of (i) seven years from the date of filing of the amended and restated certificate of incorporation, in connection with the Offering and (ii) the date specified by a vote of the holders of Class B common stock representing a majority of the outstanding shares of Class B common stock. (F11) Each share of Class B Common Stock is convertible into one share of Class A common stock at the option of the holder. Class B common stock will convert automatically on a one-for-one basis into shares of the Issuer's Class A common stock upon the earliest of (i) seven years from the date of filing of the amended and restated certificate of incorporation, in connection with the Offering and (ii) the date specified by a vote of the holders of Class B common stock representing a majority of the outstanding shares of Class B common stock. |