Company: BLLN
Filing Date: 2025-10-07
Form Type: S-1
Source: 0001193125-25-233697
Chunk: 373

Company: BillionToOne, Inc.
Filing Date: 2025-10-07
Form: S-1
Chunk 373
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 shares of early-exercised common stock options, respectively. Early exercised stock options are legally issued and outstanding and are included in issued and outstanding common shares. 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. During July 2024, investors of the Company acquired an additional 22,302 shares of common stock at a price per share equal to $22.42 per share from a stockholder who was a former employee of the Company. As a result, the Company recorded a total of $0.4 million for the year ended December 31, 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. F-33

B ILLIONT OO NE, INC.

Notes to Financial Statements

Repurchase of Common Stock

In February 2024, the Company’s Board of Directors agreed to repurchase a total of 26,750 shares of common stock that were held by a former employee of
the Company. The repurchase price paid by the Company was $20.3950 per share, resulting in a total repurchase cost of $0.5 million. As the repurchase price paid by the Company to the former employee represented an excess over the common
stock’s estimated fair market value at the time, the Company accounted for this premium as stock-based compensation expense of $0.2 million.

Option Exercises Under Promissory Notes

In
January 2019, the Company granted and approved the purchase of 700,000 restricted stock awards in aggregate at a price of $0.06 per share to two executives, and in exchange, the executives entered into full recourse promissory notes (the
“Recourse Notes”) for the amount of the exercise price of the restricted shares. The loans are due seven years from the loan date, except in the case of termination, public filing event, or disposition of common stock acquired via these
notes in which case the loan becomes due sooner. The Notes carry interest rates of 2.89%, compounded annually. The balance of the Recourse Notes may be prepaid in whole or in part, at any time without penalty. Each loan is secured by the shares
exercised by the loans, in addition to any and all other assets of the borrower. As of December