Company: BLLN
Filing Date: 2025-09-17
Form Type: DRS/A
Source: 0001193125-25-206347
Chunk: 370

Company: BillionToOne, Inc.
Filing Date: 2025-09-17
Form: DRS/A
Chunk 370
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 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 31, 2024, the loans were still outstanding. The terms of the loan require the loans to be repaid prior to termination or public offering.

In June 2021, the Company granted and approved the purchase of option awards at a price of $2.80 per share to an executive, and in exchange, the executive
entered into a full recourse promissory note for the amount of the exercise price of the restricted shares. The loan is due five 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 Recourse Note bears interest of 1.00% per annum, compounded annually. The balance of the Note 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. In November 2022, the executive