Company: BLLN
Filing Date: 2025-09-17
Form Type: DRS/A
Source: 0001193125-25-206347
Chunk: 366

Company: BillionToOne, Inc.
Filing Date: 2025-09-17
Form: DRS/A
Chunk 366
---
ible Preferred Stock |     |    899,730 |
| Series A-4 Redeemable Convertible Preferred Stock |     |     25,761 |
| Series A-5 Redeemable Convertible Preferred Stock |     |    114,613 |
| Series A-6 Redeemable Convertible Preferred Stock |     |  5,796,201 |
| Series B-1 Redeemable Convertible Preferred Stock |     |  5,182,287 |
| Series B-2 Redeemable Convertible Preferred Stock |     |  2,566,902 |
| Series C Redeemable Convertible Preferred Stock   |     |  5,628,825 |
| Series C-1 Redeemable Convertible Preferred Stock |     |  1,726,823 |
| Series D Redeemable Convertible Preferred Stock   |     |  4,656,233 |
| Redeemable Convertible Preferred stock warrants   |     |      9,660 |
| Common stock warrants                             |     |    121,566 |
| Options to purchase common stock                  |     |  6,849,412 |
| Stock options available for future grants         |     |  1,659,634 |
| Total common stock reserved                       |     | 37,724,507 |

F-30

B ILLIONT OO NE, INC. Notes to Financial Statements Stock Plan In December 2018, the Company adopted the 2018 Stock Plan (the “2018 Plan”). The 2018 Plan authorizes the granting of stock options upon the approval of the Company’s Board of Directors, to employees and consultants providing services to the Company. Stock options granted under the 2018 Plan generally expire within 10 years from the date of grant and are generally issued at the fair value of the underlying shares of common stock on the date of grant as determined by the Company’s Board of Directors. The shares subject to each option typically allow for 25% of the shares to vest and become exercisable on the first anniversary of the vesting commencement date and thereafter, the remaining 75% will vest and become exercisable in 36 equal monthly installments. The Company may include other vesting terms from time to time. Incentive and non-statutorystock options may be granted with exercise prices not less than 100% of the estimated fair value of the common stock on the date of grant, as determined by the Board of Directors.