Company: BLLN
Filing Date: 2025-09-17
Form Type: DRS/A
Source: 0001193125-25-206347
Chunk: 307

Company: BillionToOne, Inc.
Filing Date: 2025-09-17
Form: DRS/A
Chunk 307
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 and the activities of the partnership. Partners of a partnership holding our Class A common stock should
consult their tax advisor as to the particular U.S. federal income tax consequences applicable to them.

We have not sought and will not seek any ruling from the IRS
with respect to the statements made and the conclusions reached in the following discussion. There can be no assurance that the IRS will not challenge one or more of the tax consequences described herein, or that any such challenge would not be
sustained by a court.

THIS SUMMARY IS FOR GENERAL INFORMATION ONLY AND IS NOT INTENDED TO CONSTITUTE A COMPLETE DESCRIPTION OF ALL TAX CONSEQUENCES FOR NON-U.S.HOLDERS RELATING TO THE OWNERSHIP AND DISPOSITION OF OUR CLASS A COMMON STOCK. PROSPECTIVE HOLDERS OF OUR CLASS A COMMON STOCK SHOULD CONSULT WITH THEIR TAX ADVISORS REGARDING THE TAX CONSEQUENCES TO THEM (INCLUDING THE APPLICATION AND EFFECT OF ANY FEDERAL, STATE, LOCAL, AND NON-U.S.TAX LAWS) OF THE OWNERSHIP AND DISPOSITION OF OUR CLASS A COMMON STOCK.

Dividends

As discussed in the section titled “Dividend policy,”
we do not expect to declare or make any distributions on our Class A common stock in the foreseeable future. If we do pay dividends on shares of our Class A common stock, however, such distributions will constitute dividends for U.S.
federal income tax purposes to the extent paid from our current or accumulated earnings and profits, as determined under U.S. federal income tax principles. Distributions in excess of our current and accumulated earnings and profits will constitute
a return of capital that is applied against and reduces, but not below zero, a non-U.S. holder’s adjusted tax basis in shares of our Class A common stock. Any excess will be treated as capital gain
and such gain will be subject to the treatment described below under the section titled “—Gain on sale or other disposition of Class A common stock.” Any such distributions will also be subject to the discussion below under
the section titled “—Backup withholding and information reporting” and “—Foreign account tax compliance act.”

Any dividend paid
to a non-U.S. holder on our Class A common stock that is not effectively connected with a non-U.S. holder’s conduct of a trade or business in the United
States will generally be subject to U.S. withholding tax at a 30% rate. The withholding tax might apply at a reduced rate, however, under the terms of an applicable income tax treaty