XOMA Royalty Corp New Standards Disclosure

Accounting Pronouncements Recently Adopted

In November 2023, the FASB issued ASU 2023-07, Segment Reporting, which expands annual and interim disclosure requirements for reportable segments, primarily through enhanced disclosures about significant segment expenses. The amendments in ASU 2023-07 are effective for all public entities for fiscal years beginning after December 15, 2023 and interim periods within fiscal years beginning after December 15, 2024. The Company adopted annual requirements under ASU 2023-07 during the year ended December 31, 2024 and adopted interim requirements under ASU 2023-07 during the interim period ended March 31, 2025 (Note 16).

In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which includes amendments that further enhance income tax disclosures, primarily through standardization and disaggregation of rate reconciliation categories and income taxes paid by jurisdiction. The amendments are effective for all public entities for fiscal years beginning after December 15, 2024. The Company adopted ASU 2023-09 during the year ended December 31, 2025 (Note 15).

Recent Accounting Pronouncements Not Yet Adopted

In October 2023, the FASB issued ASU 2023-06, Disclosure Improvements: Codification Amendments in Response to the Securities and Exchange Commission’s Disclosure Update and Simplification Initiative. ASU 2023-06 incorporates 14 of the 27 disclosure requirements published in SEC Release No. 33-10532: Disclosure Update and Simplification into various topics within the ASC. ASU 2023-06's amendments represent clarifications to, or technical corrections of, current requirements. For SEC registrants, the effective date for each amendment will be the date on which the SEC removes that related disclosure from its rules. Early adoption is prohibited. The Company does not expect the standard to have a material impact on its consolidated financial statements and disclosures.

In November 2024, the FASB issued ASU 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses. ASU 2024-03 requires public companies to disclose, in the notes to the financial statements, specific information about certain costs and expenses at each interim and annual reporting period. This includes disclosing amounts related to employee compensation, depreciation, and intangible asset amortization. In addition, public companies will need to provide a qualitative description of the amounts remaining in relevant expense captions that are not separately disaggregated quantitatively. ASU 2024-03 is effective for public business entities for annual reporting periods beginning after December 15, 2026, and interim reporting periods beginning after December 15, 2027. Implementation of ASU 2024-03 may be applied prospectively or retrospectively. The Company is currently evaluating the impact that the standard will have on its financial statement disclosures.

In May 2025, the FASB issued ASU 2025-03, Business Combinations (Topic 805) and Consolidation (Topic 810): Determining the Accounting Acquirer in the Acquisition of a Variable Interest Entity. ASU 2025-03 changes how companies determine the accounting acquirer in certain business combinations involving variable interest entities. The new guidance requires companies to consider the factors used for other acquisition transactions to assess which party is the accounting acquirer. ASU 2025-03 is effective for annual reporting periods beginning after December 15, 2026, including interim periods within those fiscal years. Early adoption is permitted. The Company is currently evaluating the impact of adopting this new accounting guidance on its financial statements and related disclosures.

In May 2025, the FASB issued ASU 2025-04, Compensation – Stock Compensation (Topic 718) and Revenue from Contracts With Customers (Topic 606): Clarifications to Share-Based Consideration Payable to a Customer. ASU 2025-04 revises the definition of a performance condition, eliminates the forfeiture policy election for service conditions, and clarifies that the variable consideration constraint in ASC 606 does not apply to share-based consideration payable to customers. The new guidance requires entities to consistently account for share-based awards granted to customers by clarifying the treatment of vesting conditions and ensuring alignment with ASC 606 and ASC 718. ASU 2025-04 is effective for fiscal years beginning after December 15, 2026, including interim periods within those fiscal years. Early

adoption is permitted. The Company is currently evaluating the impact of adopting this new accounting guidance on its financial statements and related disclosures.

In July 2025, the FASB issued ASU 2025-05, Financial Instruments—Credit Losses (Topic 326) Measurement of Credit Losses for Accounts Receivable and Contract Assets, which provides a practical expedient that allows entities to assume that current conditions as of the balance sheet date do not change for the remaining life of the asset. ASU 2025-05 is effective for annual periods beginning after December 15, 2025, and interim periods within those annual reporting periods. Early adoption is permitted, including periods for which financial statements have not been issued or made available for issuance. The Company is currently evaluating the impact of adopting this new accounting guidance on its financial statements and related disclosures.

In September 2025, the FASB issued ASU 2025-07, Derivatives and Hedging (Topic 815) and Revenue from Contracts with Customers (Topic 606), which refines the scope of derivative accounting to exclude certain non-exchange-traded contracts with underlyings based on the operations or activities specific to one of the parties to the contract and clarifies the accounting for share-based noncash consideration in revenue contracts under ASC 606. ASU 2025-07 is effective for annual periods beginning after December 15, 2026, and interim periods within those annual reporting periods. Early adoption is permitted. Transition can be applied prospectively to new contracts or on a modified retrospective basis. The Company is currently evaluating the impact of adopting this new accounting guidance on its financial statements and related disclosures.

In November 2025, the FASB issued ASU 2025-08, Financial Instruments—Credit Losses (Topic 326): Purchased Loans, which introduces the concept of Purchased Seasoned Loans (PSLs) and requires these loans to be accounted for using the gross-up approach. The ASU also permits a policy election to measure expected credit losses using amortized cost rather than the unpaid principal balance for PSLs. ASU 2025-08 is effective for annual periods beginning after December 15, 2026, and interim periods within those annual reporting periods. Early adoption is permitted. The Company is currently evaluating the impact of adopting this new accounting guidance on its financial statements and related disclosures.

In December 2025, the FASB issued ASU 2025-11, Interim Reporting (Topic 270): Narrow-Scope Improvements, which makes narrow-scope improvements to clarify the applicability and enhance the navigability of interim reporting guidance. The ASU consolidates existing interim disclosure requirements from other ASC topics, and introduces a principle requiring disclosure of events and changes since the end of the last annual reporting period that have a material impact on the entity. ASU 2025-11 is effective for interim periods within fiscal years beginning after December 15, 2027, for public business entities, and for interim periods within fiscal years beginning after December 15, 2028 for other entities. Early adoption is permitted. Transition may be applied prospectively or retrospectively. The Company is currently evaluating the impact of adopting this new accounting guidance on its financial statements and related disclosures.

In December 2025, the FASB issued ASU 2025-12, Codification Improvements, which addresses suggestions received from stakeholders regarding the ASC and makes other incremental improvements to U.S. GAAP. The update represents changes to the codification that clarify, correct errors in or make other improvements to a variety of topics that are intended to make it easier to understand and apply. ASU 2025-12 is effective for fiscal years beginning after December 15, 2026 and interim periods within those fiscal years. Entities are required to apply the amendments to ASC 260 retrospectively. All other amendments may be applied prospectively or retrospectively. Early adoption is permitted. The Company is currently evaluating the impact of this guidance on its consolidated financial statements and related disclosures.