Company: BLLN
Filing Date: 2025-09-17
Form Type: DRS/A
Source: 0001193125-25-206347
Chunk: 162

Company: BillionToOne, Inc.
Filing Date: 2025-09-17
Form: DRS/A
Chunk 162
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 increase in professional fees, a $0.8 million increase in marketing costs and a $1.7 million increase in facilities and other costs. These increases were driven by a net increase of 74 employees from the year ended December 31, 2023 to the year ended December 31, 2024 to support our sales and marketing strategies. Interest income

|                 |     | Year ended            
 December 31,          |  2023 |     |   |  2024 |     |   | $ Change |     |     | % Change |
|:----------------|:----|:----------------------|------:|:----|:--|------:|:----|:--|---------:|:----|:----|:---------|
|                 |     | -dollars in thousands |       |     |   |       |     |   |          |     |     |          |
| Interest income |     | $                     | 3,456 |     | $ | 5,819 |     | $ |    2,363 |     |     | 68%      |

Interest income increased $2.4 million, or 68%, for the year ended December 31, 2024 compared to the year ended December 31, 2023. The increase was primarily due to higher average cash and cash equivalents balances. Interest expense

|                  |     | Year ended            
 December 31,          
 2023                  |        |   |     | 2024 |        |   |     | $ Change |     |     | % Change |       |
|:-----------------|:----|:----------------------|:-------|:--|:----|:-----|:-------|:--|:----|:---------|----:|:----|:---------|:------|
|                  |     | -dollars in thousands |        |   |     |      |        |   |     |          |     |     |          |       |
| Interest expense |     | $                     | (3,272 | ) |     | $    | (2,386 | ) |     | $        | 886 |     |          | (27)% |

109

Interest expense decreased $0.9 million, or 27%, for the year ended December 31, 2024 compared to the year ended December 31, 2023. The decrease was attributed to incurring a full year’s worth of interest in