Company: BLLN
Filing Date: 2025-08-11
Form Type: DRS/A
Source: 0000950123-25-007483
Chunk: 271

Company: BillionToOne, Inc.
Filing Date: 2025-08-11
Form: DRS/A
Chunk 271
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 footnote is 31 rue de Hollerich, L-1741, Luxembourg. |

| (13) |     | Consists of (i)    shares of Class A common stock held by Neotribe Ignite Fund I, L.P.; (ii)    shares of Class A common stock held by Neotribe SPV I BTO, LLC;                                                                                    
 and (iii)    shares of Class A common stock held by NeoTribe Ventures I, L.P., for itself and as nominee for NeoTribe Associates I, L.P. Krishna Swaroop Kolluri is the general partner for each of Neotribe Ignite Fund I,                        
 L.P. and NeoTribe Ventures I, L.P. and NeoTribe Associates I, L.P., and the managing member of Neotribe SPV I BTO, LLC and may be deemed to have beneficial ownership of the shares held by each of them. The address for each of the entities and 
 individuals listed in this footnote is 1300 El Camino Real, Suite 100, Menlo Park, California 94025.                                                                                                                                               |

210

Description of capital stock The following is a summary of our capital stock, certain provisions of our Post-IPOCertificate of Incorporation and Post-IPOBylaws as each will be in effect upon the completion of this offering, our IRA, and relevant provisions of Delaware law. Because it is only a summary, it does not contain all the information that may be important to you. These descriptions are qualified in their entirety by our Post-IPOCertificate of Incorporation, our Post-IPOBylaws, and our IRA, which are each filed as exhibits to our registration statement of which this prospectus is a part, as well as the relevant provisions of the DGCL. General Immediately prior to the completion of this offering, our Post-IPOCertificate of Incorporation will provide for two classes of common stock. In addition, our Post-IPOCertificate of Incorporation will authorize shares of undesignated preferred stock, the rights, preferences, and privileges of which may be designated from time to time by our Board of Directors. Immediately prior to the completion of this offering, our authorized capital stock will consist of shares, all with a par value of $ per share, of which:

| • |     | shares are designated as Class A common stock; |

| • |     | shares