Company: BLLN
Filing Date: 2025-10-07
Form Type: S-1
Source: 0001193125-25-233697
Chunk: 396

Company: BillionToOne, Inc.
Filing Date: 2025-10-07
Form: S-1
Chunk 396
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 also entitled to receive dividends whenever funds are legally available and when and if declared by the Board of Directors, subject to the prior rights of holders of all series of stock outstanding. No dividends have been declared or paid by the Company since inception. The Company is required to reserve and keep available out of its authorized but unissued shares of common stock such a number of shares sufficient to affect the conversion of all outstanding shares of redeemable convertible preferred stocks, preferred stock and common stock warrants, and options granted and available for grant under the Company’s stock option plan. The amount of such shares of the Company’s common stock reserved for these purposes at June 30, 2025 is as follows:

| Series A-1 Redeemable Convertible Preferred Stock |     |  1,349,650 |
| Series A-2 Redeemable Convertible Preferred Stock |     |  1,137,210 |
| Series A-3 Redeemable Convertible 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                  |     |  8,933,419 |
| Stock options available for future grants         |     |    921,186 |
| Total common stock reserved                       |     | 39,070,066 |

F-57

BILLIONTOONE, INC. Notes to Unaudited Interim Financial Statements Stock Plan In December 2018, the Company adopted the 2018 Stock Plan (the “2018 Plan”). The