Company: BLLN
Filing Date: 2025-10-07
Form Type: S-1
Source: 0001193125-25-233697
Chunk: 359

Company: BillionToOne, Inc.
Filing Date: 2025-10-07
Form: S-1
Chunk 359
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3 and 2024, respectively. The Company did not have any material short-term lease costs during the years ended December 31, 2023 and 2024. Other information related to the Company’s operating leases were as follows for the years ended December 31 (in thousands):

|                                                                                                   |     |   |  2023 |     |   |  2024 |
|:--------------------------------------------------------------------------------------------------|:----|:--|------:|:----|:--|------:|
| Cash paid for amounts included in the measurement of operating lease liabilities within operating 
 cash flows                                                                                        |     | $ | 4,872 |     | $ | 8,516 |

As of December 31, 2023 and 2024, the weighted average remaining operating lease term was 8.8 years and 7.8 years, respectively. As of December 31, 2023 and 2024, the weighted average discount rate used to estimate operating lease liabilities was 8.4% and 8.4%, respectively. F-24

B ILLIONT OO NE, INC. Notes to Financial Statements As of December 31, 2024, future lease payments under operating leases were as follows (in thousands):

| Year ending December 31:                     
 2025                                         |     |   |   8,810 |   |
|:---------------------------------------------|:----|:--|--------:|:--|
| 2026                                         |     |   |   9,115 |   |
| 2027                                         |     |   |   9,430 |   |
| 2028                                         |     |   |   9,757 |   |
| 2029                                         |     |   |  10,094 |   |
| Thereafter                                   |     |   |  29,382 |   |
| Total lease payments                         |     | $ |  76,588 |   |
| Less: imputed interest                       |     |   | (21,393 | ) |
| Present value of operating lease liabilities |     | $ |  55,195 |   |

Financing Leases As of December 31, 2023 and 2024, the weighted average remaining financing lease term was 2.3 years and 1.8 years, respectively. As of December 31, 2023 and 2024, the weighted average interest rate for the Company’s financing leases was