Company: BLLN
Filing Date: 2025-11-05
Form Type: 3
Source: 0001193125-25-267696
Chunk: 1

Company: BillionToOne, Inc.
Filing Date: 2025-11-05
Form: 3
Chunk 1
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     |     |                   |                             |     |     |   |
| Stock Option (right to buy)                |                                                    $0.45 | N/A                                                                         | N/A                                                    | N/A                                                      | N/A                                                   | N/A | N/A | [F2] - 08/20/2029 | Common Stock [F1] - 125,000 | N/A | N/A | D |
| Stock Option (right to buy)                |                                                    $2.80 | N/A                                                                         | N/A                                                    | N/A                                                      | N/A                                                   | N/A | N/A | [F2] - 06/07/2031 | Common Stock [F1] - 25,000  | N/A | N/A | D |
| Stock Option (right to buy)                |                                                    $2.80 | N/A                                                                         | N/A                                                    | N/A                                                      | N/A                                                   | N/A | N/A | [F2] - 10/14/2031 | Common Stock [F1] - 25,000  | N/A | N/A | D |
| Stock Option (right to buy)                |                                                   $11.55 | N/A                                                                         | N/A                                                    | N/A                                                      | N/A                                                   | N/A | N/A | [F3] - 10/17/2033 | Common Stock [F1] - 40,000  | N/A | N/A | D |
| Stock Option (right to buy)                |                                                   $17.12 | N/A                                                                         | N/A                                                    | N/A                                                      | N/A                                                   | N/A | N/A | [F4] - 10/16/2034 | Common Stock [F1] - 20,000  | N/A | N/A | D |
| Stock Option (right to buy)                |                                                   $30.78 | N/A                                                                         | N/A                                                    | N/A                                                      | N/A                                                   | N/A | N/A | [F5] - 09/30/2035 | Common Stock [F1] - 40,000  | N/A | N/A | D |

Remarks:

Senior Vice President of Sales and Commercial Operations
Exhibit 24 - Power of Attorney

| ** Signature of Reporting Person          
 /s/ /s/ Thomas P. Lynch, Attorney-in-Fact | Date       
 11/05/2025 |

Note: File three copies of this Form, one of which must be