Company: BLLN
Filing Date: 2025-10-07
Form Type: S-1
Source: 0001193125-25-233697
Chunk: 163

Company: BillionToOne, Inc.
Filing Date: 2025-10-07
Form: S-1
Chunk 163
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 $ Change |     |     | % Change |
|:-------------------------|:----|:----------------------|-------:|:----|:--|-------:|:----|:--|---------:|:----|:----|:---------|
|                          |     | -dollars in thousands |        |     |   |        |     |   |          |     |     |          |
| Research and development |     | $                     | 22,414 |     | $ | 36,596 |     | $ |   14,182 |     |     | 63%      |

Research and development expenses increased $14.2 million, or 63%, for the year ended December 31, 2024 compared to the year ended December 31, 2023. The increase was primarily due to a $6.4 million increase in salaries and related expenditures, which included a $0.9 million increase in stock-based compensation expense, a $5.1 million increase in overhead allocation, facilities and equipment depreciation, a $2.0 million increase in expense related to clinical studies, and a $0.7 million increase in consulting and other costs. These increases were primarily driven by a net increase in R&D headcount of 24 employees from December 31, 2023 to December 31, 2024 to support our product development and innovation efforts. Selling, general and administrative expenses

|                                     |     | Year ended            
 December 31,          |   2023 |     |   |   2024 |     |   | $ Change |     |     | % Change |
|:------------------------------------|:----|:----------------------|-------:|:----|:--|-------:|:----|:--|---------:|:----|:----|:---------|
|                                     |     | -dollars in thousands |        |     |   |        |     |   |          |     |     |          |
| Selling, general and administrative |     | $                     | 64,389 |     | $ | 91,465 |     | $ |   27,076 |     |     | 42%      |

Selling, general and administrative expenses increased $27.1 million, or 42%, for the year ended December 31, 2024 compared to the year ended December 31, 2023. The increase was primarily due to a $22.2 million increase in salaries, commissions