Company: BLLN
Filing Date: 2025-09-17
Form Type: DRS/A
Source: 0001193125-25-206347
Chunk: 107

Company: BillionToOne, Inc.
Filing Date: 2025-09-17
Form: DRS/A
Chunk 107
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, operations, and information technology resources with relevant public company 
 experience, including a Chief Financial Officer, Controller and a Vice President of Information Systems.            |

While management has made improvements to our control environment and business processes to support and scale with our growing operations, the identified material weaknesses remain un-remediated.We expect our remediation efforts to continue to take place in 2025, and to include the following:

| • |     | continue to consult with experts to complete our assessment of segregation of duties risks and implement processes and                                                           
 controls to address, manage and monitor those risks and our restriction of user access, including enhancing the usage of technology within our systems, applications, and tools; |

| • |     | continue to engage additional experts, as needed, to consult on future complex accounting matters; and |

| • |     | continue to expand our resources with the appropriate level of expertise within our accounting, finance, operations, and                                                                                                                 
 information technology functions, with the addition of positions such as a director of accounting, a technical accountant, a manager of financial planning and analysis, and additional accounting and information technology personnel. |

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These material weaknesses will not be considered remediated until management completes the design and implementation
of the measures described above and the controls operate for a sufficient period of time and management has concluded, through testing, that these controls are effective. This remediation process, including testing the effectiveness of the
remediation efforts, may extend into 2026. Additionally, we cannot ensure that we have identified all, or that we will not in the future identify additional material weaknesses. Material weaknesses may still exist when we report on the effectiveness
of our internal control over financial reporting as required under Section 404 of the Sarbanes-Oxley Act, beginning with our second annual report after the completion of this offering.

The process of designing and implementing internal control over financial reporting required to comply with the disclosure and attestation requirements of
Section 404 of the Sarbanes-Oxley Act will be time consuming and costly. If during the evaluation and testing process we identify additional material weaknesses in our internal control over financial reporting or determine that existing
material weaknesses have not been remediated, our management will be unable to assert that our internal control over financial reporting is effective. If we are unable to assert that our internal control over financial reporting is effective, or
when required in the future, if our auditors are unable to express an unqualified opinion as to the effectiveness of our internal control over financial reporting