XOMA Royalty Reports 2025 Financial Results and Highlights Recent Business Achievements

Portfolio receipts: • Achieved over $50 million of cash receipts, including $33.6 million in royalties and $16.9 million milestones, in full year 2025 • Total receipts increased 9% with royalties up 68% versus full year 2024

Business development: Added 22 assets to portfolio, including five programs in Phase 2 or Phase 3 development

Stock buyback program: Repurchased and retired 648,048 shares for an aggregate of $16.0 million

Company acquisitions: Completed seven acquisitions, accumulating $11.7 million of non-dilutive capital 1, economic interests of approximately 25% in up to $1.1 billion of milestones and low to mid-single digit royalties from eight partnered programs

Key 2026 pipeline events: • Phase 2b data from volixibat in PSC in Q2 and Phase 3 data from ersodetug in tumor HI in 2H • Potential for EMA decisions on OJEMDA™ and MIPLYFFA™ marketing authorization applications • Regulatory updates related to ersodetug in congenital HI and seralutinib in PAH

Webcast at 8:00 am Eastern Time today

EMERYVILLE, Calif., March 18, 2026 (GLOBE NEWSWIRE) -- XOMA Royalty Corporation (NASDAQ: XOMA), the biotech royalty aggregator, reported its 2025 fourth quarter and full year financial results and highlighted recent actions that have the potential to deliver additional shareholder value.

“We continue to search for innovative ways to drive enhanced optionality in the XOMA portfolio, with the addition of 22 assets and two platform technologies over the past year,” stated Owen Hughes, Chief Executive Officer of XOMA Royalty. “With multiple commercial assets delivering growing royalty receipts, we achieved positive cash flow from operations and were able to return $16 million of capital through a share buyback in 2025. Looking ahead, with 14 programs in registrational studies, we anticipate a number of catalysts over the ensuing years, including several regulatory updates and late-stage clinical readouts in 2026, which, if positive, will further diversify our commercial royalty streams and drive growing free cash flow in 2027 and beyond.”

Portfolio Updates

Business Development Activity

Fourth Quarter and Full-Year 2025 Financial Results

In the fourth quarter of 2025, XOMA Royalty received $3.2 million in cash receipts from royalties and commercial payments and $3.3 million in milestone payments and paid $1.4 million in dividends on the XOMA Royalty Perpetual Preferred stocks. For the full year of 2025, XOMA Royalty received $50.5 million in cash receipts, including $33.6 million in royalties and commercial payments and $16.9 million in milestone payments and fees. During 2025, XOMA Royalty deployed $25.0 million to acquire additional assets for its royalty and milestone portfolio, repurchased 648,048 shares of its common stock for a cost of $16.0 million, and paid $5.5 million in dividends on the XOMA Royalty Perpetual Preferred stocks.

Income and Revenue: Income and revenues for the three months ended December 31, 2025 and 2024, were $13.8 million and $8.7 million, respectively. Income and revenues for the years ended December 31, 2025 and 2024, were $52.1 million and $28.5 million, respectively. The increase in both periods was primarily driven by increased income related to VABYSMO® (faricimab-svoa) and OJEMDA™ (tovorafenib) and milestone payments received from Rezolute and Takeda.

General and Administrative (G&A) Expenses: G&A expenses for the three months ended December 31, 2025 and 2024, were $10.4 million and $7.0 million, respectively. G&A expenses for the years ended December 31, 2025 and 2024, were $36.1 million and $34.5 million, respectively. The increase of $1.6 million in 2025 was primarily due to an increase in business development and deal-related costs of $3.7 million and an increase in lease costs of $1.0 million primarily related to the HilleVax acquisition partially offset by $3.6 million in costs related to exit packages for Kinnate senior leadership in 2024.

G&A expenses for the year ended December 31, 2025, also include an increase of approximately $1.1 million associated with ongoing litigation initiated by XOMA Royalty against Janssen Biotech, Inc., asserting claims for breach of contract and unjust enrichment arising from Janssen's unauthorized use of XOMA’s intellectual property in the commercialization of TREMFYA (guselkumab). XOMA Royalty expects to continue to incur legal fees and other professional service costs associated with pursuing this litigation. Litigation is inherently uncertain, and there can be no assurance regarding the outcome of the matter or the timing or amount of any potential recovery.

XOMA Royalty’s G&A expenses for the three months ended December 31, 2025 and 2024, included non-cash stock-based compensation expenses of $3.9 million and $2.2 million, respectively, and $9.3 million and $10.3 million for the full years of 2025 and 2024, respectively.

Interest Expense: Interest expense for the three months ended December 31, 2025 and 2024, was $3.0 million and $3.4 million, respectively. Interest expense for the twelve months ended December 31, 2025 and 2024, were $13.0 million and $13.8 million, respectively. Interest expense relates to the Blue Owl Loan established in December 2023.

Net Income (Loss): XOMA Royalty reported net income of $6.1 million and $31.7 million for the three months and year ended December 31, 2025, as compared to net losses of $4.0 million and $13.8 million in the corresponding periods of 2024.

Cash Position: On December 31, 2025, XOMA Royalty had cash and cash equivalents of $133.7 million, including $50.8 million in restricted cash. The restricted cash balance included $42.3 million related to the assumed HilleVax lease and $2.2 million related to the Blue Owl Loan. Cash and cash equivalents of $106.4 million as of December 31, 2024, included $4.8 million in restricted cash related to the Blue Owl Loan.

Webcast

The Company will host a webcast on March 18, 2026, at 8:00 am Eastern Time to discuss the results and provide a business update. The webcast will be accessible on the “News & Events” page in the Investors section of XOMA Royalty’s website ( https://investors.xoma.com/news-events). A replay of the webcast will be available for 30 days following the live event.

About XOMA Royalty Corporation

XOMA Royalty is a biotechnology royalty aggregator playing a distinctive role in helping biotech companies achieve their goal of improving human health. XOMA Royalty acquires the potential future economics associated with pre-commercial and commercial therapeutic candidates that have been licensed to pharmaceutical or biotechnology companies. When XOMA Royalty acquires the future economics, the seller receives non-dilutive, non-recourse funding they can use to advance their internal drug candidate(s) or for general corporate purposes. The Company has an extensive and growing portfolio of assets (asset defined as the right to receive potential future economics associated with the advancement of an underlying therapeutic candidate). For more information about the Company and its portfolio, please visit www.xoma.com or follow XOMA Royalty Corporation on LinkedIn.

Forward-Looking Statements/Explanatory Notes

Certain statements contained in this press release are forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934, including statements regarding the timing and amount of potential commercial payments to XOMA Royalty, expectations around future royalty cash flows covering XOMA Royalty’s core operating expenses (the inflection point) and other developments related to VABYSMO® (faricimab-svoa), OJEMDA™ (tovorafenib), MIPLYFFA™ (arimoclomol), XACIATO™ (clindamycin phosphate) vaginal gel 2%, IXINITY® [coagulation factor IX (recombinant)], DSUVIA® (sufentanil sublingual tablet), and DARE to PLAY™ Sildenafil Cream and Sildenafil Cream, 3.6%; the potential occurrences and timing of the events listed under “ Key 2026 Pipeline Events”; expectations regarding the inflection point in XOMA Royalty’s business model of breakeven operating cash flows; the anticipated timings of regulatory filings and approvals related to assets in XOMA Royalty’s portfolio; and the potential of XOMA Royalty’s portfolio of partnered programs and licensed technologies generating substantial milestone and royalty proceeds over time. In some cases, you can identify such forward-looking statements by terminology such as “anticipate,” “intend,” “believe,” “estimate,” “plan,” “seek,” “project,” “expect,” “may,” “will”, “would,” “could” or “should,” the negative of these terms or similar expressions. These forward-looking statements are not a guarantee of XOMA Royalty’s performance, and you should not place undue reliance on such statements. These statements are based on assumptions that may not prove accurate, and actual results could differ materially from those anticipated due to certain risks inherent in the biotechnology industry, including those related to the fact that our product candidates subject to out-license agreements are still being developed, and our licensees may require substantial funds to continue development which may not be available; we do not know whether there will be, or will continue to be, a viable market for the products in which we have an ownership or royalty interest; and if the therapeutic product candidates to which we have a royalty interest do not receive regulatory approval, our third-party licensees will not be able to market them. Other potential risks to XOMA Royalty meeting these expectations are described in more detail in XOMA Royalty's most recent filing on Form 10-K and in other filings with the Securities and Exchange Commission. Consider such risks carefully when considering XOMA Royalty's prospects. Any forward-looking statement in this press release represents XOMA Royalty's beliefs and assumptions only as of the date of this press release and should not be relied upon as representing its views as of any subsequent date. XOMA Royalty disclaims any obligation to update any forward-looking statement, except as required by applicable law.

EXPLANATORY NOTE: Any references to “portfolio” in this press release refer strictly to milestone and/or royalty rights associated with a basket of drug products in development. Any references to “assets” in this press release refer strictly to milestone and/or royalty rights associated with individual drug products in development.

As of the date of this press release, the commercial assets in XOMA Royalty’s milestone and royalty portfolio are VABYSMO® (faricimab-svoa), OJEMDA™ (tovorafenib), MIPLYFFA™ (arimoclomol), XACIATO™ (clindamycin phosphate) vaginal gel 2%, IXINITY® [coagulation factor IX (recombinant)], DARE to PLAY™ (Sildenafil Cream), and DSUVIA® (sufentanil sublingual tablet). All other assets in the milestone and royalty portfolio are investigational compounds. Efficacy and safety have not been established. There is no guarantee that any of the investigational compounds will become commercially available.

1 This amount includes structuring agent fees associated with Repare Therapeutics and ESSA Pharmaceuticals.

2 https://ir.dayonebio.com/news-releases/news-release-details/day-one-reports-fourth-quarter-and-full-year-2025-financial

3 https://www.ipsen.com/press-release/ipsen-receives-positive-chmp-opinion-for-ojemda-for-the-treatment-as-monotherapy-of-children-with-relapsed-or-refractory-braf-altered-pediatric-low-grade-glioma-3246394/

4 https://ir.dayonebio.com/news-releases/news-release-details/servier-and-day-one-biopharmaceuticals-announce-acquisition

5 https://investors.zevra.com/news-releases/news-release-details/zevra-reports-fourth-quarter-and-full-year-2025-financial

6 https://ir.rezolutebio.com/news/detail/371/rezolute-reports-second-quarter-fiscal-2026-financial-results-and-provides-business-update

7 https://ir.gossamerbio.com/news-releases/news-release-details/gossamer-bio-announces-topline-results-phase-3-prosera-study

8 https://ir.mirumpharma.com/news/news-details/2026/Mirum-Pharmaceuticals-Reports-Fourth-Quarter-and-Year-End-2025-Results-and-Provides-Business-Update/default.aspx