Company: XOMAP
Filing Date: 2025-10-03
Form Type: 424B5
Source: 0001193125-25-230393
Chunk: 47

Company: XOMA Royalty Corp
Filing Date: 2025-10-03
Form: 424B5
Chunk 47
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 and foreign accounts, a Non-U.S. Holder generally will not
be subject to U.S. federal income tax with respect to gain realized on a sale or other taxable disposition of our Series B Preferred Stock unless (a) the gain is effectively connected with such Non-U.S.
Holder’s conduct of a trade or business within the United States (and, if required by an applicable income tax treaty, is attributable to a permanent establishment that such holder maintains in the United States), (b) such Non-U.S. Holder is a
nonresident alien individual present in the United States for 183 or more days in the taxable year of the disposition and certain other conditions are met, or (c) our Series B Preferred Stock constitutes a U.S. real property interest by reason
of our status as a U.S. real property holding corporation (“USRPHC”) for U.S. federal income tax purposes. We believe that we are not, and do not anticipate becoming, a USRPHC; however, there can be no assurance that we will not become
one in the future.

Non-U.S. Holders described in (a) above will generally be required to pay tax on the net gain derived from the sale of our Series
B Preferred Stock at regular U.S. federal income tax rates applicable to U.S. persons, unless a specific treaty exemption applies. A corporate Non-U.S. Holder may be subject to the additional branch profits tax on such gain at a 30% rate (or such
lower rate as may be specified by an applicable income tax treaty) on such effectively connected gain, as adjusted for certain items.

Gain described in
(b) above will generally be subject to U.S. federal income tax at a rate of 30% (or such lower rate as may be specified by an applicable income tax treaty), which may be offset by certain U.S.-source capital losses of a Non-U.S. Holder, provided that the Non-U.S. Holder has timely filed U.S. federal income tax returns with respect to such losses.

As discussed above under “U.S.Holders—Redemptions ofthe Series B Preferred Stock,” an amount paid to a
Non-U.S. Holder in connection with a redemption of the Series B Preferred Stock may, under certain circumstances, be treated as a dividend. In that case, the payment would be subject to the rules for dividends described above under
“Non-U.S.Holders—Distributions.”

Information Reporting Requirements and Backup Withholding

Payments of dividends on our Series B