0000791908 2026-02-09 2026-02-09 0000791908 us-gaap:CommonStockMember 2026-02-09 2026-02-09 0000791908 xoma:M8.625SeriesACumulativePerpetualPreferredStockParValue0.05PerShareMember 2026-02-09 2026-02-09 0000791908 xoma:DepositarySharesEachRepresenting11000thInterestInAShareOf8.375SeriesBCumulativePerpetualPreferredStockParValue0.05PerShareMember 2026-02-09 2026-02-09 XOMA Royalty Corp true 0000791908 8-K/A 2026-02-09 NV 001-39801 52-2154066 2200 Powell Street Suite 310 Emeryville CA 94608 (510) 204-7200 false false false false Common Stock, $0.0075 par value XOMA NASDAQ 8.625% Series A Cumulative Perpetual Preferred Stock, par value $0.05 per share XOMAP NASDAQ Depositary Shares (each representing 1/1000th interest in a share of 8.375% Series B Cumulative Perpetual Preferred Stock, par value $0.05 per share) XOMAO NASDAQ false This Current Report on Form 8-K/A is being filed as a supplement to the Current Report on Form 8-K filed by XOMA Royalty Corporation on February 9, 2026 to disclose additional information regarding the Legacy Assets of Generation Bio (as such terms are defined below).