Company: BLLN
Filing Date: 2025-09-17
Form Type: DRS/A
Source: 0001193125-25-206347
Chunk: 402

Company: BillionToOne, Inc.
Filing Date: 2025-09-17
Form: DRS/A
Chunk 402
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 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 |

| • |     | for any transaction from which the director derives any improper personal benefit. |

Our Post-IPOCertificate of Incorporation also will provide that if Delaware law is amended after the approval by our stockholders of the Post-IPOCertificate of Incorporation, to authorize corporate action further eliminating or limiting the personal liability of directors, then the liability of our directors will be eliminated or limited to the fullest extent permitted by Delaware law. II-1

Our Post-IPOBylaws will provide that we will indemnify our directors and officers to the fullest extent permitted by Delaware law, as it now exists or may in the future be amended, against all expenses and liabilities reasonably incurred in connection with their service for or on our behalf. Our Post-IPOBylaws will provide that we shall advance the expenses incurred by a director or officer in advance of the final disposition of an action or proceeding, and permit us to secure insurance on behalf of any director, officer, employee, or other agent for any liability arising out of his or her action in that capacity, whether or not Delaware law would otherwise permit indemnification. We have entered into indemnification agreements with each of our directors and executive officers and certain other key employees, a form of which is attached as Exhibit 10.1. The form of agreement provides that we will indemnify each of our directors, executive officers and such other key employees against any and all expenses incurred by that director, executive officer, or other key employee because of his or her status as one of our directors, executive officers, or other key employees, to the fullest extent permitted by Delaware law, our Post-IPOCertificate of Incorporation and our Post-IPOBylaws. In addition, the form agreement provides that, to the fullest extent permitted by Delaware law, we will advance all expenses incurred by our directors, executive officers and other key employees in connection with a legal proceeding. Reference is made to the underwriting agreement contained in