Company: BLLN
Filing Date: 2025-08-11
Form Type: DRS/A
Source: 0000950123-25-007483
Chunk: 247

Company: BillionToOne, Inc.
Filing Date: 2025-08-11
Form: DRS/A
Chunk 247
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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 obligations regarding the election of our directors. Director independence Our Board of Directors has undertaken a review of the independence of the directors and considered whether any director has a material relationship with us that could compromise his or her ability to exercise independent judgment in carrying out his or her responsibilities. Based upon information requested from and provided by each director concerning such director’s background, employment and affiliations, including family relationships, our Board of Directors determined that , representing of our directors, are “independent directors” as defined under current rules and regulations of the SEC and the listing standards of 189

the Nasdaq Global Market (Nasdaq) . In making these determinations, our Board considered the current and prior relationships that each non-employee
director has with our company and all other facts and circumstances that our Board deemed relevant in determining their independence, including the beneficial ownership of our capital stock by each
non-employee director and the transactions involving them described in “Certain relationships and related party transactions.”

Board leadership structure

Our Board of Directors is currently chaired by
our Chief Executive Officer and Co-Founder, Dr. Atay. Our Board of Directors does not have a policy that requires the roles of Chief Executive Officer and Chairman of the Board to be separate. The Board
believes that Mr. Atay’s service as both Chief Executive Officer and Chairman of the Board is in the best interest of us and our stockholders.

Our
corporate governance guidelines