Company: BLLN
Filing Date: 2025-10-07
Form Type: S-1
Source: 0001193125-25-233697
Chunk: 378

Company: BillionToOne, Inc.
Filing Date: 2025-10-07
Form: S-1
Chunk 378
---
 during the period, less shares subject to repurchase. Diluted net loss per share is computed by including all potentially dilutive securities outstanding for the period using the treasury stock method or the if-convertedmethod, as applicable. For periods in which the Company reports net losses, diluted net loss per common share is the same as basic net loss per common share as all potentially dilutive securities are anti-dilutive. The following table sets forth the computation of basic and dilutive net loss per share attributable to common stockholders for the years ended December 31, 2023 and 2024 (in thousands, except per share amounts):

| Numerator:                                                                        |     | 2023 |         |   |     | 2024 |         |   |
|:----------------------------------------------------------------------------------|:----|:-----|--------:|:--|:----|:-----|--------:|:--|
| Net loss                                                                          |     | $    | (82,683 | ) |     | $    | (41,570 | ) |
| Denominator:                                                                      |     |      |         |   |     |      |         |   |
| Weighted-average shares used in calculating net loss per share, basic and diluted |     |      |   9,783 |   |     |      |  10,080 |   |
| Net loss per share, basic and diluted                                             |     | $    |   (8.45 | ) |     | $    |   (4.12 | ) |

Since the Company was in a loss position for the period presented, basic net loss per share is the same as diluted net loss per share as the inclusion of all potential common shares outstanding would have been anti-dilutive. Potentially dilutive securities that were not included in the diluted per share calculations because they would be anti-dilutive were as follows for the years ended December 31, 2023 and 2024:

|                                                             |     | 2023 |            |     | 2024 |            |
| Redeemable convertible preferred stock                      |     |      | 22,701,179 |     |      | 29,084,235 |
| Outstanding stock options                                   |     |      |  6,193,236 |     |      |  6,849,412 |
| Restricted stock awards in exchange for non recourse note   |     |      |    700,000 |     |      |    700,000 |
| W