Company: BLLN
Filing Date: 2025-09-17
Form Type: DRS/A
Source: 0001193125-25-206347
Chunk: 398

Company: BillionToOne, Inc.
Filing Date: 2025-09-17
Form: DRS/A
Chunk 398
---
 period was $4.7 million. The fair value is being expensed over the vesting period of the options, on a straight-line basis as the services are being provided. As of June 30, 2025, there was approximately $53.2 million of total unrecognized compensation cost related to unvested options, which is expected to be recognized over the weighted average period of 3.9 years. Also, in June 2025, the Board of Directors granted stock options of 1,003,102 shares to the Company’s CEO and Co-Founderand 501,551 shares to the Chief Technology Officer and Co-Founderat an exercise price of $20.04 per share. The vesting commencement date of the stock option is June 11, 2025 and the stock options vests monthly over six years. F-59

BILLIONTOONE, INC. Notes to Unaudited Interim Financial Statements Stock-Based Compensation Expense The table below shows stock-based compensation expense included in the statements of operations and comprehensive loss for the six months ended June 30, 2024 and 2025 (in thousands):

|                                     |     |   | June 30, 
     2024 |     |   | June 30, 
     2025 |
|:------------------------------------|:----|:--|---------:|:----|:--|---------:|
| Cost of revenue                     |     | $ |      564 |     | $ |      738 |
| Research and development            |     |   |    1,166 |     |   |    1,571 |
| Selling, general and administrative |     |   |    2,175 |     |   |    2,797 |
| Total stock-based compensation      |     | $ |    3,905 |     | $ |    5,106 |

Secondary Sales of Common Stock During June 2024, investors of the Company acquired 52,750 shares of common stock at a price per share equal to $22.42 per share from employee stockholders. As a result, the Company recorded a total of $0.3 million for the six months ended June 30, 2024 in stock-based compensation expense for the difference between the price paid by these investors and the estimated fair value of the acquired common stock from stockholders on the date of the transactions. Repurchase of Common Stock In February 2024, the Company’s Board of Directors agreed to repurchase