Company: BLLN
Filing Date: 2025-09-17
Form Type: DRS/A
Source: 0001193125-25-206347
Chunk: 265

Company: BillionToOne, Inc.
Filing Date: 2025-09-17
Form: DRS/A
Chunk 265
---
 by our Board of Directors, subject to the terms of our Post-IPOCertificate of Incorporation and Post-IPOBylaws as each are in effect after this offering. Each of our current directors will continue to serve as a director until the election and qualification of his or her successor, or until his or her earlier death, resignation, or removal. In accordance with the terms of our Post-IPOCertificate of Incorporation and Post-IPOBylaws that will be effective immediately prior to the completion of this offering, our Board will be divided into three classes, Class I, Class II, and Class III, with members of each class serving staggered three-year terms. Effective immediately prior to the completion of this offering, our Board will be divided into the following classes:

| • |     | Class I, which will consist of     , whose terms will expire at our first annual meeting of 
 stockholders to be held after the completion of this offering;                              |

| • |     | Class II, which will consist of     , whose terms will expire at our second annual meeting of 
 stockholders to be held after the completion of this offering; and                            |

| • |     | Class III, which will consist of     , whose terms will expire at our third annual meeting of 
 stockholders to be held after the completion of this offering.                                |

At each annual meeting of stockholders to be held after the initial classification, the successors to directors whose terms then expire will be elected to serve from the time of election and qualification until the third annual meeting following their election and until their successors are duly elected and qualified. The authorized size of our Board is currently six members and may be changed only by resolution by a majority of the Board. We expect that additional directorships resulting from an increase in the number of directors will be distributed among the three classes so that, as nearly as possible, each class will consist of one-thirdof the directors. This classification of the Board may have the effect of delaying or preventing changes in our control or management. Our directors may be removed for cause by the affirmative vote of two-thirdsof the voting power of our then-outstanding capital stock. Our directors were elected to and currently serve on the Board of Directors pursuant to the Voting Agreement. See the section titled “Certain relationships and related party transactions—Voting agreement.” This agreement will terminate upon the completion of this offering, after which there will be no further contractual