Company: BLLN
Filing Date: 2025-09-17
Form Type: DRS/A
Source: 0001193125-25-206347
Chunk: 285

Company: BillionToOne, Inc.
Filing Date: 2025-09-17
Form: DRS/A
Chunk 285
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 2024 (the ROFR), including entities with which certain of our directors are affiliated. Under the ROFR, certain holders of our capital stock have the right of first refusal and co-salerelating to the shares of our common stock held by the parties to the agreement. Upon the completion of this offering, the ROFR will terminate. Indemnification agreements Our amended and restated Post-IPOCertificate of Incorporation will contain provisions limiting the liability of directors and officers, and our Post-IPOBylaws will provide that we will indemnify each of our directors and executive officers to the fullest extent permitted under Delaware law. Our Post-IPOCertificate of Incorporation and Post-IPOBylaws will also provide our Board of Directors with discretion to indemnify our employees and other agents when determined appropriate by the Board of Directors. In addition, we have entered into or intend to enter into an indemnification agreement with each of our directors, which will require us to indemnify them. For more information regarding these agreements, see the section titled “—Limitations on liability and indemnification of directors and officers.” Other transactions To facilitate the Class B Stock Exchange, we will enter into exchange agreements with our Co-Founders,effective as of immediately prior to effectiveness of the filing of our Post-IPOCertificate of Incorporation, pursuant to which shares of our Class A common stock held by our Co-Founders,or entities controlled by our Co-Founders,will automatically be exchanged for an equivalent number of shares of Class B common stock immediately prior to the completion of this offering. Limitations on liability and indemnification of directors and officers Our Post-IPOCertificate of Incorporation will contain provisions that limit the liability of our current and former directors for monetary damages to the fullest extent permitted by Delaware law. The Post-IPOCertificate of Incorporation will provide that our directors will not be personally liable to us or our stockholders for monetary damages for any breach of fiduciary duty as a director, except for liability:

| • |     | for any breach of the director’s duty of loyalty to us or our stockholders; |

| • |     | for acts or omissions not in good faith or that involve intentional misconduct or a knowing violation of law; |

| • |     | in respect of unlawful payments of dividends or unlawful stock repurchases or redemptions as provided in Section 174 
 of the DGCL;                                                                                                         |

| • |     | an officer in any action by or in the right of the Company; or