Company: BLLN
Filing Date: 2025-09-17
Form Type: DRS/A
Source: 0001193125-25-206347
Chunk: 310

Company: BillionToOne, Inc.
Filing Date: 2025-09-17
Form: DRS/A
Chunk 310
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RPHC depends on the fair market value of our U.S. real property interests relative to the fair market value of our U.S. and worldwide real property interests plus our other assets used or held for use in a trade or business, there can be no assurance that we will not become a USRPHC in the future. Even if we are or were to become a USRPHC gain arising from the sale or other taxable disposition by a non-U.S.holder will not be subject to U.S. federal income tax if our Class A common stock is “regularly traded,” as defined by applicable Treasury Regulations, on an established securities market, and such non-U.S.holder owned, actually and constructively, 5% or less of our Class A common stock throughout the shorter of the five-year period ending on the date of the sale or other taxable disposition or the non-U.S.holder’s holding period. If the foregoing exception does not apply, and we are a USRPHC, a Non-U.S.Holder’s proceeds received on the disposition of our Class A common stock will generally be subject to withholding at a rate of 15%. No assurances can be provided that our Class A common stock will be regularly traded on an established securities market for the purposes of the rule described above. 229

If any gain from the sale, exchange or other disposition of our Class A common stock, (1) is effectively
connected with a U.S. trade or business conducted by a non-U.S. holder and (2) if required by an applicable income tax treaty between the United States and the
non-U.S. holder’s country of residence, is attributable to a permanent establishment or fixed maintained by such non-U.S. holder in the United States, then the
gain generally will be subject to U.S. federal income tax at the same rates applicable to U.S. persons, net of certain deductions and credits. If the non-U.S. holder is a corporation, under certain
circumstances, that portion of its earnings and profits that is effectively connected with its U.S. trade or business, subject to certain adjustments, generally would be subject also to a “branch profits tax” at a rate of 30% or such
lower rate as may be specified by an applicable income tax treaty.

Backup withholding and information reporting

The applicable withholding agent must report annually to the IRS and to each non-U.S. holder the amount of dividends paid to, and
the tax withheld with respect to, each non-U