Company: XOMAP
Filing Date: 2025-10-02
Form Type: SC TO-T/A
Source: 0001193125-25-228454
Chunk: 2

Company: XOMA Royalty Corp
Filing Date: 2025-10-02
Form: SC TO-T/A
Chunk 2
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 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)) and Items 1 through 9 and Item 11 of the Schedule TO, as amended, to the extent such Items incorporate by reference the information contained in the Offer to Purchase, is hereby amended as follows:

All references to “one minute after 11:59 p.m. Eastern Time on October 3, 2025” shall be replaced with “one minute
after 11:59 p.m. Eastern Time on October 17, 2025”.

| ITEM 12. | EXHIBITS. |

| Index No.  |     |                                                                                                                                     |
| (a)(1)(A)  |     | Offer to Purchase, dated August 15, 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)(1)(E)  |     | Amended and Restated Schedule A to the Offer to Purchase.                                                                           |
| (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)* |     | Press Release of Purchaser issued on October 2, 2025                                                                                |
| (d)(1)     |     | Share Purchase Agreement, by and among XOMA Royalty Corporation and LAVA Therapeutics N.V., dated August                            
 3, 2025 (incorporated by reference to Exhibit 2.1 to LAVA’s Current Report on Form 8-K filed with the SEC on August 4,