Company: XOMAP
Filing Date: 2025-10-17
Form Type: SC TO-T/A
Source: 0001193125-25-242199
Chunk: 2

Company: XOMA Royalty Corp
Filing Date: 2025-10-17
Form: SC TO-T/A
Chunk 2
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 this Amendment. Capitalized terms used but not defined in this Amendment have the meanings ascribed to them in the Offer to Purchase. The Schedule TO is hereby amended and supplemented as follows: ITEMS 1 THROUGH 9 AND 11 All of the information set forth in the Offer to Purchase is incorporated by reference herein in response to Items 1 through 9 and Item 11 of this Schedule TO, and is supplemented by the information specifically provided in this Schedule TO. AMENDMENTS TO THE RELATED EXHIBITS The information set forth in the Form of Letter of Transmittal (Exhibit (a)(1)(B)), Form of Letter to Brokers, Dealers, Commercial Banks, Trust Companies and Other Nominees (Exhibit (a)(1)(C)), Form of Letter to Clients for Use by Brokers, Dealers, Commercial Banks, Trust Companies and Other Nominees (Exhibit (a)(1)(D)), to the extent such Items incorporate by reference the information contained in the Offer to Purchase, is hereby amended as follows:

| • |     | All references to “A Cash Amount per Share between $1.16 and $1.24, consisting of a Base Price Per Share of         
 $1.16 and an Additional Price Per Share of up to $0.08” shall be replaced with “A Cash Amount per Share of $1.04,”. |

3

| ITEM 12. | EXHIBITS. |

| Index No.  |     |                                                                                                                                                                          |
| (a)(1)(A)* |     | Amended and Restated Offer to Purchase, dated October 17, 2025.                                                                                                          |
| (a)(1)(B)  |     | Form of Letter of Transmittal.                                                                                                                                           |
| (a)(1)(C)  |     | Form of Letter to Brokers, Dealers, Commercial Banks, Trust Companies and Other Nominees.                                                                                |
| (a)(1)(D)  |     | Form of Letter to Clients for Use by Brokers, Dealers, Commercial Banks, Trust Companies and Other Nominees.                                                             |
| (a)(5)(A)  |     | Press Release of LAVA issued on August 4, 2025 (incorporated by reference to Exhibit                                                                                     
 99.1 to LAVA’s Current Report on Form 8-K filed with the SEC on August 4, 2025).                                                                                         |
| (a)(5)(B)  |