Company: XOMAP
Filing Date: 2025-10-03
Form Type: 424B5
Source: 0001193125-25-230383
Chunk: 89

Company: XOMA Royalty Corp
Filing Date: 2025-10-03
Form: 424B5
Chunk 89
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 31, 2023, filed with the SEC on March 8, 2024;                                                                                                                                                                                |

All documents we file with the SEC pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act shall be deemed incorporated by reference in this prospectus and to be a part of this prospectus from the date of filing of those documents, with the exception of any portion of any report or document that is not deemed “filed” under such provisions on or after the date of this prospectus, until the earlier of the date on which: (1) all of the securities registered hereunder have been sold; or (2) the registration statement of which this prospectus is a part has been withdrawn. Under no circumstances will any information filed under Items 2.02 or 7.01 of Current Report on Form 8-Kbe deemed incorporated herein by reference unless such Form 8-Kexpressly provides to the contrary. Upon written or oral request, we will provide without charge to each person to whom a copy of the prospectus is delivered a copy of the documents incorporated by reference herein (other than exhibits to such documents unless such exhibits are specifically incorporated by reference herein). You may request a copy of these filings, at no cost, by writing, calling or emailing us at the contact information set forth below. We have not authorized anyone to provide you with any information that differs from that contained in this prospectus. Accordingly, we take no responsibility for any other information that others may give you. You should not assume that the information in this prospectus is accurate as of any date other than the date of the front cover of this prospectus. XOMA Corporation 2200 Powell Street, Suite 310 Emeryville, CA 94608 (510) 204-7200 42

$75,000,000 Common Stock PROSPECTUS SUPPLEMENT

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October 3, 2025