Company: BLLN
Filing Date: 2025-10-07
Form Type: S-1
Source: 0001193125-25-233697
Chunk: 292

Company: BillionToOne, Inc.
Filing Date: 2025-10-07
Form: S-1
Chunk 292
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1,784,414 shares of Class A common stock held by Wipro Enterprises Private Limited (Wipro), of which Mr. Rai is                                      
 the nominee/investor director appointed by Wipro Enterprises Limited. Mr. Rai will not have voting or dispositive control of the securities described in clause (ii) of the prior sentence while such securities are held by Wipro and thus 
 disclaims beneficial ownership of such securities The address for each of the entities and individuals listed in this footnote is 2180 Sand Hill Road, Ste. 100, Menlo Park, California 94025.                                              |

| (9) |     | Includes 1,891,151 shares of Class A common stock issuable upon exercise of stock options within 60 days of September 30, 2025. |

| (10) |     | Consists of (i) 2,631,664 shares of Class A common stock held by Hummingbird Opportunity Fund II CommV; (ii) 2,580,833 shares of Class A common stock held by Hummingbird Ventures III CommV; (iii) 2,015,118                                       
 shares of Class A common stock held by Hummingbird Dragons CommV; (iv) 18,845 shares of Class A common stock held by Hummingbird Collective CommV; and (v) 640,727 shares of Class A common stock held by HB&Q NV (HB&Q                             
 COMPARTMENT III). Humming Bird Ventures Management NV is the managing member of Hummingbird Opportunity Fund II CommV, Hummingbird Ventures III CommV, Hummingbird Dragons CommV, Hummingbird Collective CommV, and HB&Q NV (HB&Q COMPARTMENT       
 III) (the Hummingbird Funds) and, as a result, may be deemed to beneficially own shares held by the Hummingbird Funds. Mr. Ileri, Barend Van den Brande, and Lukas Decoster are partners of Hummingbird Ventures Management NV and may be deemed to 
 have shared voting and investment power over the shares held by the Hummingbird Funds. The address for each of the entities and individuals listed in this footnote is Square Victoria Regain 1, 1210 Sint-Joost-ten-Node, Belgium.                 |

| (11) |     | Consists of (i) 2,585,520 shares of Class A common stock held by Libertus Capital I; (ii) 99