Company: BLLN
Filing Date: 2025-10-17
Form Type: S-1/A
Source: 0001193125-25-242632
Chunk: 295

Company: BillionToOne, Inc.
Filing Date: 2025-10-17
Form: S-1/A
Chunk 295
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 Adams Street 2020 Direct Growth Equity Fund LP; (iii) 176,271 shares of Class A common stock held by Adams Street 2021 Direct Growth Equity Fund LP; (iv) 269,918 shares of Class A common              
 stock held by Adams Street 2022 Direct Growth Equity Fund LP; (v) 240,072 shares of Class A common stock held by; (vi) 675,352 shares of Class A common stock held by Adams Street Growth Equity Fund VII LP; and Adams Street Private                 
 Equity Navigator Fund LLC (f/k/a Adams Street Global Private Markets Fund LP) (vi) 227,508 shares of Class A common stock held by FCPR GF—Lumyna Private Equity World Fund. Adams Street Partners, LLC is the managing member of the general           
 partner of each of Adams Street 2019 Direct Growth Equity Fund LP, Adams Street 2020 Direct Growth Equity Fund LP, Adams Street 2021 Direct Growth Equity Fund LP, Adams Street 2022 Direct Growth Equity Fund LP, Adams Street Growth Equity Fund VII 
 LP, and Adams Street Private Equity Navigator Fund LLC (f/k/a Adams Street Global Private Markets Fund LP) (collectively, the U.S. Funds) and, as a result, may be deemed to beneficially own the shares held by the U.S. Funds. Furthermore, Adams    
 Street Partners, LLC, the Sous- Délégataire Financier of the Délégataire Financier of the management company of FCPR GF—Lumyna Private Equity World Fund (Lumyna and together with the U.S. Funds, the Funds)                                          |

220

| and, as a result, may be deemed to beneficially own the shares held by Lumyna. Thomas S. Bremner, Jeffrey T. Diehl, Brian Dudley, Elisha P. Gould, Robin Murray and Fred Wang, each of whom is a                                                        
 partner of Adams Street Partners, LLC (or a subsidiary thereof), may be deemed to have shared voting and investment power over the shares held by the Funds. The address for each entity referenced above is 1 North Wacker Drive, Suite 2200, Chicago, 
 IL 60606-2807.                                                                                                                                                                                                                                          |

| (6) |     | Consists of (i) the shares of Class A common stock referenced in footnote 10 and (ii) 28,981 shares of Class A common stock held directly by Mr. Ileri. |

| (7