Company: BLLN
Filing Date: 2025-09-17
Form Type: DRS/A
Source: 0001193125-25-206347
Chunk: 260

Company: BillionToOne, Inc.
Filing Date: 2025-09-17
Form: DRS/A
Chunk 260
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 square feet as of June 30, 2025. We expect to enter into additional leases for patient service centers in
the ordinary course.

We believe that our current facilities are adequate to meet our current needs and that, should it be needed, suitable additional or
alternative space will be available to accommodate our operations.

Legal Proceedings

From time to time, we
are involved in legal claims, regulatory investigations, inquiries, proceedings and other legal matters arising from the normal course of business and typical for our industry. Although no formal legal proceeding has been instituted, from time to
time, we receive requests from governmental agencies, or third

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parties working on their behalf, for documents and information related to our products. We do not view any of the legal claims, regulatory investigations, inquiries, proceedings and other legal
matters that we are currently subject to as being material to our business; however, it is difficult to assess the outcome of these matters, and we may not prevail in any current or future proceedings or litigation.

Litigation or any other legal, regulatory or administrative proceedings, regardless of the outcome, can result in substantial cost and diversion of our resources,
including our management’s time and attention, and there can be no assurances that favorable final outcomes will be obtained. For additional information on risks relating to legal proceedings, see the section titled “Risk
Factors—Risks Related to Our Business and Strategy—We are involved in legal proceedings, regulatory investigations and inquiries and other legal matters, which may have an adverse effect on our business, financial condition, results of
operations and prospects.”

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Management

Management Executive officers and directors The following table sets forth certain information with respect to our executive officers and directors, including their ages as of September 1, 2025:

| Name                                      |     | Age |    |     | Position(s)                                              |
| Executive officers and employee directors |     |     |    |     |                                                          |
| Oguzhan Atay, PhD                         |     |     | 37 |     | Chief Executive Officer and Chair of the Board           |
| David Tsao, PhD                           |     |     | 36 |     | President, Chief Technology Officer and Director         |
| Ross Taylor                               |     |     | 62 |     | Chief Financial Officer                                  |
| Shan Riku Sakakibara                      |     |     | 42 |     | Chief Product Officer                                    |
| Thomas Lynch                              |     |     | 58 |     | General Counsel, Chief Compliance Officer