Company: BLLN
Filing Date: 2025-06-20
Form Type: DRS
Source: 0000950123-25-006095
Chunk: 331

Company: BillionToOne, Inc.
Filing Date: 2025-06-20
Form: DRS
Chunk 331
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 31, 2024. Since January 1, 2022, 725,989 shares of common stock have been issued upon the exercise of stock options pursuant to the 
 2018 Stock Plan.                                                                                                                                                                                                                                |

Warrants

| • |     | In July 2022, we issued a warrant to purchase up to 41,209 shares of common stock with an exercise price of                                                                                                                                     
 $10.92 per share to one accredited investor; 30,907 warrants were exercisable upon execution of the agreement; the remaining warrants became exercisable as we made additional draws on the Western Alliance Bank debt. As of December 31, 2023 
 all of the warrants were exercisable.                                                                                                                                                                                                           |

None of the foregoing transactions involved any underwriters, underwriting discounts or commissions, or any public offering. We believe the offers, sales and issuances of the above securities were exempt from registration under the Securities Act (or Regulation D or Regulation S promulgated thereunder) by virtue of Section 4(a)(2) of the Securities Act because the issuance of securities to the recipients did not involve a public offering, or in reliance on Rule 701 because the transactions were pursuant to compensatory benefit plans or contracts relating to compensation as provided under such rule. The recipients of the securities in each of these transactions represented their intentions to acquire the securities for investment only and not with a view to or for sale in connection with any distribution thereof, and appropriate legends were placed upon the stock certificates issued in these transactions. All recipients had adequate access, through their relationships with us, to information about us. The sales of these securities were made without any general solicitation or advertising. Item 16. Exhibits and financial statement schedules (a) Exhibits

| Exhibit 
 No.     |     | Description                                                                                                                                       |
| 1.1**   |     | Form of Underwriting Agreement                                                                                                                    |
| 3.1**   |     | Amended and Restated Certificate of Incorporation of the Registrant, as currently in                                                              
 effect.                                                                                                                                           |
| 3.2**   |     | Form of Post-IPO Certificate of Incorporation of the Registrant, to be effective upon completion of this offering.                                |
| 3.3**   |     | Amended and Restated Bylaws of Registrant, as currently in effect.                                                                                |
| 3.4**   |     | Form of Post-IPO Bylaws of Registrant, to be effective upon