XOMA Royalty Corp files DEFA14A

This supplemental filing (DEFA14A) announces an amendment to the previously disclosed Agreement and Plan of Merger between XOMA Royalty Corporation and Ligand Pharmaceuticals Incorporated. The amendment, dated May 16, 2026, adds XOMA Royalty Holdings Corporation (HoldCo) as a party to the Merger Agreement. HoldCo was formed by XOMA Royalty Corporation on May 15, 2026, for the purpose of effecting a holding company reorganization.