Company: BLLN
Filing Date: 2025-10-07
Form Type: S-1
Source: 0001193125-25-233697
Chunk: 393

Company: BillionToOne, Inc.
Filing Date: 2025-10-07
Form: S-1
Chunk 393
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 Capital has the option to redeem the notes upon (i) a
change in control of the Company, (ii) an event of default, or (iii) the maturity date. The redemption price of the note shall equal to the following: (1) 130% of principal amounts of notes if the payment is made within 24 months of
issuance; (2)145% of principal amounts of notes if the payment is made within 36 months of issuance; (3) If the payment is made within 48 months, an amount that would generate an internal rate of return (“IRR”) of 12.25%; (4) if the
payment is made within 60 months of the issuance, an amount that would generate an IRR of 11.75%; (5) if the payment is made thereafter but before maturity, an amount that would generate an IRR of 11.25%; and (6) if the payment is made at
maturity, an amount that would generate an IRR of 10.0%.

F-55

BILLIONTOONE, INC. Notes to Unaudited Interim Financial Statements The Company is required to maintain trailing six-monthnet revenue based on a schedule that gradually increases up to $120.0 million after the year ending December 31, 2026.

| Period     |     | Minimum Trailing  
 Six-Month Net     
 Revenue Threshold 
 (in millions)     |       |
|:-----------|:----|:------------------|------:|
| Q1 2025    |     | $                 |  56.1 |
| Q2 2025    |     | $                 |  65.6 |
| Q3 2025    |     | $                 |  75.8 |
| Q4 2025    |     | $                 |  82.8 |
| Q1 2026    |     | $                 |  87.2 |
| Q2 2026    |     | $                 | 101.8 |
| Q3 2026    |     | $                 | 117.2 |
| Q4 2026    |     | $                 | 120.0 |
| Thereafter |     | $                 | 120.0 |

In addition, the Company is required to maintain a trailing six-monthGross Margin of not less than 30%.The agreement also contains a revenue participation agreement, under which, for any