Company: BLLN
Filing Date: 2025-10-07
Form Type: S-1
Source: 0001193125-25-233697
Chunk: 159

Company: BillionToOne, Inc.
Filing Date: 2025-10-07
Form: S-1
Chunk 159
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 The decrease was due to interest expense of $2.0 million and a change in fair value of the Oberland debt of $1.1 million, of which $0.6 million is related to changes in the fair value of the debt and $0.5 million is associated with the revenue participation payment. Change in fair value of convertible notes

|                                           |     | Six months ended       
 June 30,               
 2024                   
 (dollars in thousands) |      |   |     | 2025 |   |     | $ Change |     |     | % Change |    |
|:------------------------------------------|:----|:-----------------------|:-----|:--|:----|:-----|:--|:----|:---------|----:|:----|:---------|:---|
| Change in fair value of convertible notes |     | $                      | (835 | ) |     | $    | — |     | $        | 835 |     |          | —% |

108

Change in fair value of convertible notes decreased $0.8 million for the six months ended June 30, 2025 compared to the six months ended June 30, 2024. The decrease was due to a change in fair value of the 2022 Convertible Notes that were extinguished in 2024. Other income (expense), net

|                             |     | Six months ended       
 June 30,               
 2024                   
 (dollars in thousands) |      |   |     | 2025 |    |     | $ Change |     |     | % Change |        |
|:----------------------------|:----|:-----------------------|:-----|:--|:----|:-----|---:|:----|:---------|----:|:----|:---------|:-------|
| Other income (expense), net |     | $                      | (443 | ) |     | $    | 39 |     | $        | 482 |     |          | (109)% |

Other income (expense), net increased $0.5 million, or 109%, for the six months ended June 30, 2025 compared to the six months ended June 30, 2024, which was primarily driven by an increase in the fair value of our common stock warrant liability of $0.4 million for the six months ended June 30, 2024 as compared to a decrease in fair value of our common stock warrants of