Xencor Extends Ultomiris Patent to 2028, Anticipates $100M to $120M in Additional Revenue
Written by Emily J. Thompson, Senior Investment Analyst
Updated: Dec 09 2025
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Source: Newsfilter
- Patent Extension: Xencor has been granted U.S. Patent 12,492,253 covering its Xtend™ Fc domain, extending the patent term to December 2028, which is approximately three years longer than the previous patent, ensuring low-single digit royalty income from Ultomiris.
- Potential Revenue Growth: Based on consensus sales forecasts, Xencor anticipates receiving an additional $100 million to $120 million in royalties during the extended patent term, which will support funding for its internal pipeline as it advances in clinical development.
- Strategic Partnership: OMERS has acquired royalties due to Xencor on global Ultomiris sales starting in 2026, with potential annual revenues of up to $35 million, enhancing the company's financial stability as excess royalties revert to Xencor.
- Technological Advantage: Xencor's Xtend antibody half-life extension technology provides new therapeutic mechanisms for its XmAb medicines, driving innovation in cancer and autoimmune disease treatments, aligning with its long-term value creation strategy.
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Analyst Views on XNCR
Wall Street analysts forecast XNCR stock price to rise over the next 12 months. According to Wall Street analysts, the average 1-year price target for XNCR is 27.50 USD with a low forecast of 18.00 USD and a high forecast of 42.00 USD. However, analyst price targets are subjective and often lag stock prices, so investors should focus on the objective reasons behind analyst rating changes, which better reflect the company's fundamentals.
11 Analyst Rating
10 Buy
1 Hold
0 Sell
Strong Buy
Current: 12.380
Low
18.00
Averages
27.50
High
42.00
Current: 12.380
Low
18.00
Averages
27.50
High
42.00
About XNCR
Xencor, Inc. is a clinical-stage biopharmaceutical company developing engineered antibodies for the treatment of cancer and autoimmune diseases. It has more than 20 candidates engineered with its XmAb technology that are in clinical development, and multiple XmAb medicines are marketed by partners. Its XmAb engineering technology enables small changes to a protein structure that result in new mechanisms of therapeutic action. Its wholly-owned development candidates include XmAb942, XmAb819, XmAb808, and XmAb541. Candidates co-developed with partners include Plamotamab. Its clinical-stage drug candidates advanced by partners include Xaluritamig (AMG 509), ASP2138, JNJ-9401, JNJ-1493, Xpro1595, Obexelimab, and Novartis XmAb, an undisclosed antibody candidate. Its cytokine drug candidates in clinical development consist of efbalropendekin alfa (XmAb306/RG6323). Its Vudalimab is a bispecific antibody that targets PD-1 and CTLA-4.
About the author
Emily J. Thompson
Emily J. Thompson, a Chartered Financial Analyst (CFA) with 12 years in investment research, graduated with honors from the Wharton School. Specializing in industrial and technology stocks, she provides in-depth analysis for Intellectia’s earnings and market brief reports.
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Xencor Extends Ultomiris Patent to 2028, Anticipates $100M to $120M in Additional Revenue
- Patent Extension: Xencor has been granted U.S. Patent 12,492,253 covering its Xtend™ Fc domain, extending the patent term to December 2028, which is approximately three years longer than the previous patent, ensuring low-single digit royalty income from Ultomiris.
- Potential Revenue Growth: Based on consensus sales forecasts, Xencor anticipates receiving an additional $100 million to $120 million in royalties during the extended patent term, which will support funding for its internal pipeline as it advances in clinical development.
- Strategic Partnership: OMERS has acquired royalties due to Xencor on global Ultomiris sales starting in 2026, with potential annual revenues of up to $35 million, enhancing the company's financial stability as excess royalties revert to Xencor.
- Technological Advantage: Xencor's Xtend antibody half-life extension technology provides new therapeutic mechanisms for its XmAb medicines, driving innovation in cancer and autoimmune disease treatments, aligning with its long-term value creation strategy.
Continue Reading