Company: BLLN
Filing Date: 2025-06-20
Form Type: DRS
Source: 0000950123-25-006095
Chunk: 221

Company: BillionToOne, Inc.
Filing Date: 2025-06-20
Form: DRS
Chunk 221
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 Executive Officer and Chief Technology Officer, respectively. Neither of them has received any compensation for their service as directors for the year ended December 31, 2024. The compensation received by each of Drs. Atay and Tsao as employees is set forth in the section titled “Executive compensation—Summary compensation table.” During the year ended December 31, 2024, we did not pay any fees to, make any equity awards or non-equityawards to, or pay any other compensation to the non-employeemembers of our Board of Directors, other than reimbursement of direct expenses incurred in connection with attending meetings of our Board of Directors or its committees. Non-employeedirector compensation policy We intend to adopt a non-employee director compensationpolicy, pursuant to which our non-employeedirectors will be eligible to receive compensation for service on our Board of Directors and committees of our Board of Directors, to be effective following the completion of this offering. 175

Executive compensation Our named executive officers, which consist of our principal executive officer and our two other most highly compensated officers for our fiscal year ended December 31, 2024, are:

| • |     | Oguzhan Atay, PhD, Chief Executive Officer; |

| • |     | Ross Taylor, Chief Financial Officer; and |

| • |     | Nancy Johnson, Senior Vice President of Sales and Commercial Operations. |

Summary compensation table The following table shows information regarding the compensation of our named executive officers for the fiscal year ended December 31, 2024.

| Name and principal position                              |     | Year |      |     | Salary 
 ($)    |         |     | Bonus  
 ($)(1) |         |     | Option 
 awards 
 ($)(2) |           |     | Non-equity     
 incentive plan 
 compensation   
 ($)(3)         |         |     | All other    
 compensation 
 ($)(4)       |        |     | Total 
 ($)   |           |
| Oguzhan Atay, PhD                                        
 Chief Executive Officer                                  |     |      | 2024 |     |        | 303,739 |     |        |  55,722 |     |        |         — |     |                |       — |     |              | 11,603 |     |       |   371,064 |
| Ross Taylor                                              
 Chief Financial Officer                                  |     |      | 2024 |     |        | 296,969 |     |        | 148,