XNCR

Xencor, Inc. has reported its second-quarter 2026 results, with net loss improving to US$21.73 million versus US$30.83 million a year earlier, while basic and diluted loss per share from continuing operations narrowed to US$0.29 from US$0.41. Over the first half of 2026, however, Xencor’s net loss widened to US$150.65 million and loss per share to US$1.99, highlighting a tension between short-term quarterly progress and heavier year-to-date spending. We’ll now consider how this quarterly loss improvement, against a larger first-half deficit, reshapes Xencor’s investment narrative and risk profile. AI is about to change healthcare. These 43 stocks are working on everything from early diagnostics to drug discovery. The best part - they are all under $10b in market cap - there's still time to get in early. To own Xencor, you need to believe its TL1A and bispecific antibody platform will eventually justify ongoing losses and heavy R&D. The latest Q2 numbers modestly ease short term earnings pressure, but the sharply higher first half loss keeps funding needs and trial execution as the key near term catalyst and the biggest risk. On balance, this earnings print does not materially change that trade off, but it does sharpen focus on how tightly costs are managed into late stage trials. The most relevant recent update here is the May 2026 XmAb942 program news, with Phase 2b XENITH UC now underway and an interim blinded analysis expected around year end 2026. That study is a central value driver for Xencor, and the widened first half loss underlines how dependent the story is on hitting those clinical milestones on time and without major safety or efficacy surprises, given the company remains unprofitable and is investing heavily in TL1A assets. Yet even as Q2 losses eased, the scale of first half spending raises questions investors should be aware of about how long Xencor can fund its trials without... Read the full narrative on Xencor (it's free!) Xencor's narrative projects $148.2 million revenue and $28.2 million earnings by 2029. This requires 15.0% yearly revenue growth and an earnings increase of about $200.6 million from -$172.4 million today. Uncover how Xencor's forecasts yield a $28.50 fair value, a 37% upside to its current price. Some of the lowest ranked analysts were already assuming revenue might fall about 11.7 percent a year and still saw Xencor needing very high future profit margins to justify a US$14.00 target price, which is far more pessimistic than consensus and could look different once this Q2 loss trend and your chosen risk around funding constraints are fully reflected. Explore 2 other fair value estimates on Xencor - why the stock might be worth just $28.50! Don't just follow the ticker - dig into the data and build a conviction that's truly your own. A great starting point for your Xencor research is our analysis highlighting 1 key reward and 1 important warning sign that could impact your investment decision. Our free Xencor research report provides a comprehensive fundamental analysis summarized in a single visual - the Snowflake - making it easy to evaluate Xencor's overall financial health at a glance. Our top stock finds are flying under the radar-for now. Get in early: The future of work is here. Discover the 36 top robotics and automation stocks leading the charge in AI-driven automation and industrial transformation. Rare earth metals are the new gold rush. Find out which 28 stocks are leading the charge. Invest in the nuclear renaissance through our list of 89 elite nuclear energy infrastructure plays powering the global AI revolution. This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned. Companies discussed in this article include XNCR. Have feedback on this article? Concerned about the content? Get in touch with us directly. Alternatively, email [email protected]

-- XmAb819 ccRCC expansion cohorts to be presented in an oral session at ESMO 2026; multiple Phase 1 sub-studies in earlier lines of therapy and additional indications now open for enrollment or planned -- -- XmAb942 enrollment in XENITH-UC remains on track with primary endpoint of the 12-week induction period expected in 2H27 -- -- XmAb412 (TL1A x IL23p19) first-in-human healthy participant study open for enrollment -- PASADENA, Calif., August 05, 2026--(BUSINESS WIRE)--Xencor, Inc. (NASDAQ:XNCR), a clinical-stage biopharmaceutical company developing engineered antibodies for the treatment of cancer and autoimmune diseases, today reported financial results for the second quarter ended June 30, 2026. "We are excited to present XmAb819 results at ESMO this fall and for other fast-approaching key milestones across our wholly owned clinical pipeline," said Bassil Dahiyat, Ph.D., president and chief executive officer at Xencor. "Enrollment remains on track for updates later this year for XmAb942 in the XENITH-UC study and for our two B-cell depleting bispecifics, plamotamab and XmAb657, in their respective Phase 1 studies. And we recently started the Phase 1 study of XmAb412, our first XenLock™ bispecific antibody, and plan to have healthy participant data in the first half of 2027. Xencor’s focus on clinical execution and data delivery is setting us up for an accelerating tempo of anticipated readouts in 2027 and beyond." "Consistent with our focus on efficient clinical decision-making, we have prioritized the ongoing combination study of XmAb541 and XmAb808, which provides tumor-targeted co-stimulation through CD28 agonism, after observing moderate anti-tumor activity from early monotherapy data of XmAb541. CLDN6 remains a challenging tumor target, and we hope to expand upon an emerging therapeutic window through the orthogonal targeting provided by XmAb808." Wholly Owned Pipeline Overview XmAb819 (ENPP3 x CD3), a potential first-in-class, tumor-targeted, T-cell engaging XmAb® 2+1 bispecific antibody in development for patients with clear cell renal cell carcinoma and other tumors with high ENPP3 expression, including colorectal cancer, non-small cell lung cancer and papillary renal cell carcinoma Clear cell renal cell carcinoma (ccRCC): On track to initiate a registration enabling study of XmAb819 as a monotherapy in advanced ccRCC during 2027. Phase 1 results for patients with advanced ccRCC were accepted for a proffered paper oral presentation at the European Society For Medical Oncology (ESMO) Congress 2026, to be held October 23-27 in Madrid, Spain. The presentation during ESMO will focus on dose levels in intravenous expansion cohorts under evaluation as recommended Phase 3 doses (RP3D). Dose escalation of subcutaneous administration in advanced ccRCC is ongoing with evaluation for further development expected prior to a registration enabling study. A sub-study for patients with intermediate- or poor-risk advanced ccRCC who have progressed after nivolumab in combination with ipilimumab as a first-line treatment (IO doublet therapy) is planned to open for enrollment in the third quarter of 2026. A sub-study evaluating the combination of XmAb819 and anti-PD1 therapy in patients with advanced ccRCC is currently being planned. Additional tumors with high ENPP3 expression A sub-study for patients with ENPP3+ advanced colorectal cancer, non-small cell lung cancer and papillary renal cell carcinoma began enrollment in the second quarter of 2026. XmAb541 (CLDN6 x CD3) in combination with XmAb808 (B7-H3 x CD28), in Phase 1 clinical development for T-cell engagement of Claudin-6 expressing tumors, including high-grade serous ovarian cancer XmAb541 development in the ongoing Phase 1 dose-escalation study in combination with XmAb808 has been prioritized. XmAb541 monotherapy expansion cohorts at the putative RP3D (60 mg dosed every 3 weeks) in high-grade serous ovarian carcinoma (TPS≥50) and germ cell tumors are expected to complete enrollment by year end, with the data supporting combination development with XmAb808. The Phase 1 dose-escalation study of XmAb541 and XmAb808 is ongoing and expected to reach the combination’s target dose range in 2027. Prioritization of the combination is anticipated to reduce projected overall XmAb541 program expense for 2027 and 2028. XmAb541 Clinical Data Emerging data from XmAb541 monotherapy indicate clinical activity to date at the putative RP3D in heavily-pretreated patients, with an approximate 14% overall response rate (ORR) in patients with ovarian cancer and an approximate 28% ORR in patients with germ cell tumors, which supports further evaluation in combination with XmAb808 to provide tumor-targeted CD28 agonism and additional T-cell stimulation. Potential additional anti-tumor activity was observed at doses above 60 mg, but reversible hearing impairment limited XmAb541 drug exposure due to the frequency of dose interruptions and dose reductions. Hearing impairment is potentially on target for CLDN6, which is expressed on cochlear hair cells. Cytokine release syndrome (CRS) has been low grade and no cases of Grade ≥3 CRS were reported at any dose level. At the putative RP3D, Grade 1 CRS was reported in approximately 14% of patients, and Grade 2 CRS was reported in approximately 17%. No other clinically significant safety signals were observed, and the profile is supportive of future outpatient administration. Based on monotherapy data, in July 2026 the U.S. FDA granted Fast Track designation to XmAb541 for the treatment of patients with germ cell tumors who have relapsed following two or more lines of platinum therapy or were refractory to prior platinum therapy. At the American Association for Cancer Research Annual Meeting in April 2026, Xencor presented data demonstrating the co-expression of CLDN6 and B7-H3 on high-grade serous ovarian carcinoma cells. Preclinical testing demonstrated that XmAb808 promoted durable T-cell-directed killing of cancer cells with XmAb541, enhanced XmAb541-induced killing by exhausted T cells, and enhanced anti-tumor activity of XmAb541. CLDN6 and B7-H3 have low expression overlap on normal tissues, potentially localizing T-cell co-stimulation to tumor cells. XmAb942 (Xtend™ anti-TL1A), a potential best-in-class, high-potency, extended half-life antibody in development for patients with inflammatory bowel disease Xencor is conducting the XENITH-UC Study, a global Phase 2b study of XmAb942 in ulcerative colitis (UC). XENITH-UC is a randomized, double-blind, placebo-controlled trial in patients with moderately to severely active UC, whose disease has progressed after at least one conventional or advanced therapy. Enrollment expectations continue to support a XENITH-UC blinded interim analysis around year-end 2026 and reaching the primary endpoint of the 12-week induction period in 2H27. The primary endpoint of XENITH-UC is the percentage of patients achieving clinical remission defined by the modified Mayo score at week 12. XmAb412 (TL1A x IL23p19), a potential best-in-class, extended half-life bispecific antibody for dual targeting of inflammatory pathways in autoimmune and inflammatory disease, in Phase 1 development and enrolling healthy participants XmAb412 robustly suppresses both TL1A and IL-23 inflammatory pathways and is predicted to have a human half-life between 60 and 70 days. XmAb412 supports high-concentration, low viscosity and citrate-free formulation suitable for subcutaneous dosing. XmAb412 is Xencor’s first novel bispecific antibody developed using the XenLock™ platform. Xencor initiated a first-in-human study of XmAb412 in the third quarter of 2026 and plans to present initial data from the study in 1H27. Plamotamab (CD20 x CD3), a clinical-stage, B-cell depleting bispecific T-cell engager in Phase 1 development for patients with rheumatoid arthritis (RA), who have progressed through prior standard-of-care treatment Xencor plans to provide an update on progress achieved in the Phase 1b study of plamotamab in RA in 2H26. XmAb657 (CD19 x CD3), a clinical-stage, potent, extended half-life B-cell depleting bispecific T-cell engager in Phase 1 dose escalation, enrolling healthy participants and patients with idiopathic inflammatory myopathies, systemic scleroderma and Sjögren’s disease Xencor plans to provide an update on progress achieved in the Phase 1 study of XmAb657 in 2H26. Recent Partnership Developments Alexion: In July 2026, Xencor announced that it will receive $105 million from Alexion pursuant to a settlement agreement that resolves the previously disclosed dispute regarding U.S. royalties from sales of Ultomiris®. Under the settlement agreement, Alexion is obligated to pay Xencor in two equal installments. The first $52.5 million payment is anticipated in August 2026, the second $52.5 million payment within 14 days following the one-year anniversary of the date of the settlement agreement, and Alexion will have no further obligation to pay royalties on U.S. sales of Ultomiris. Xencor expects to continue receiving royalties on ex-U.S. sales of Ultomiris under the existing terms of its license agreement with Alexion. Ultomiris is a drug being developed and commercialized by Alexion and is its registered trademark. Zenas BioPharma: In May 2026, Zenas submitted a biologics license application (BLA) to the U.S. FDA for obexelimab in IgG4-related disease, and Xencor received a $10 million regulatory milestone payment in June 2026 in connection with this BLA submission. Obexelimab targets CD19 with its variable domain and uses an XmAb Immune Inhibitor Fc Domain. In November 2021, Xencor licensed obexelimab to Zenas, and under the license agreement, Xencor is eligible to receive up to $450 million in future milestone payments and tiered royalties on net sales that range from mid-single-digit to mid-teen percentages, dependent on geography. Financial Guidance: Based on current operating plans, Xencor expects to end 2026 with between $420 million and $440 million in cash, cash equivalents and marketable debt securities, and to have sufficient cash resources to fund research and development programs and operations through 2028. Financial Results for the Second Quarter Ended June 30, 2026 Cash, cash equivalents and marketable debt securities totaled $486.4 million as of June 30, 2026, compared to $610.8 million as of December 31, 2025. Revenue for the second quarter ended June 30, 2026 was $51.2 million, compared to $43.6 million for the same period in 2025. Revenue earned in the second quarter of 2026 was primarily milestone revenue from Zenas BioPharma and royalty revenue from Alexion and Incyte. As the Settlement Agreement with Alexion resolved the uncertainty surrounding the variable consideration associated with U.S. Ultomiris royalties, the Company recognized $27.6 million of royalty revenue during the second quarter ended June 30, 2026, representing royalty attributable to U.S. Ultomiris sales during the dispute period through June 30, 2026. The remaining $77.4 million of settlement consideration relates to royalty rights for periods subsequent to June 30, 2026 and will be recognized in the third quarter of 2026. Research and development (R&D) expenses for the second quarter ended June 30, 2026 were $71.9 million, compared to $61.7 million for the same period in 2025. Increased R&D spending for the second quarter of 2026 compared to 2025 is primarily due to increased spending on pipeline programs, partially offset by lower stock-based compensation expense. General and administrative (G&A) expenses for the second quarter ended June 30, 2026 were $16.4 million, compared to $15.1 million for the same period in 2025. G&A spending for the second quarter of 2026 compared to 2025 remained relatively consistent. Other income, net, for the second quarter ended June 30, 2026 was $15.1 million, compared to $2.1 million for the same period in 2025. Increased other income, net, for the second quarter of 2026, compared to 2025, is primarily due to unrealized gains on an equity security. Net loss attributable to Xencor for the second quarter ended June 30, 2026 was $21.7 million, or $(0.29) on a fully diluted per share basis, compared to net loss of $30.8 million, or $(0.41) on a fully diluted per share basis, for the same period in 2025. About Xencor Xencor is a clinical-stage biopharmaceutical company developing engineered antibodies for the treatment of patients with cancer and autoimmune diseases. More than 20 candidates engineered with Xencor's XmAb® technology are in clinical development, and multiple XmAb medicines are marketed by partners. Xencor’s XmAb engineering technology enables small changes to a protein’s structure that result in new mechanisms of therapeutic action. For more information, please visit www.xencor.com. Forward-Looking Statements Certain statements contained in this press release may constitute forward-looking statements within the meaning of the "safe harbor" provisions of the Private Securities Litigation Reform Act of 1995. Forward-looking statements include statements that are not purely statements of historical fact, and can generally be identified by the use of words such as "potential," "can," "will," "plan," "may," "could," "would," "expect," "anticipate," "seek," "look forward," "believe," "committed," "investigational," "indicates," "supports," and similar terms, or by express or implied discussions relating to Xencor’s business, including, but not limited to, statements regarding our expectations regarding regulatory and partnership milestone achievements, clinical pipeline advancements, planned receipt and presentations of clinical data, including the expected timing thereof, and planned and ongoing clinical trials, including the expected timing thereof, projected financial resources and financial guidance, including estimated cash, cash equivalents and marketable debt securities at year end and cash runway for research and development programs and operations, expectations for and estimates of future royalty revenues, the quotations from Xencor's president and chief executive officer, and other statements that are not purely statements of historical fact. Such statements are made on the basis of the current beliefs, expectations, and assumptions of the management of Xencor and are subject to significant known and unknown risks, uncertainties and other factors that may cause actual results, performance or achievements and the timing of events to be materially different from those implied by such statements, and therefore these statements should not be read as guarantees of future performance or results. Such risks include, without limitation, the risks associated with the process of discovering, developing, manufacturing and commercializing drugs that are safe and effective for use as human therapeutics, the ability of publicly disclosed preliminary clinical trial data to support continued clinical development and regulatory approval for specific treatments, the risk of loss of key members of management, the risk that the fair value of our marketable equity securities will decline and the risks, uncertainties and other factors described under the heading "Risk Factors" in Xencor's Annual Report on Form 10-K for the year ended December 31, 2025 as well as Xencor's subsequent filings with the Securities and Exchange Commission. You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof. Xencor undertakes no obligation to revise or update these forward-looking statements to reflect events or circumstances after the date hereof, except as required by law. View source version on businesswire.com: https://www.businesswire.com/news/home/20260805524130/en/ Contacts For Investors:Charles [email protected] (626) 737-8118 For Media:Cassidy McClainInizio [email protected] (619) 694-6291

-- XmAb819 clear cell renal cell carcinoma (ccRCC) expansion cohort results to be presented at a medical conference in 2H26 -- -- XmAb412 (TL1A x IL23p19) first-in-human healthy participant study on-track for 3Q26 start -- -- Plamotamab and XmAb657 autoimmune studies on-track for 2H26 progress update -- PASADENA, Calif., May 06, 2026--(BUSINESS WIRE)--Xencor, Inc. (NASDAQ:XNCR), a clinical-stage biopharmaceutical company developing engineered antibodies for the treatment of cancer and autoimmune diseases, today reported financial results for the first quarter ended March 31, 2026. "Xencor continues to execute across our wholly owned clinical pipeline, with significant progress in both oncology and autoimmune disease. We look forward to presenting expansion cohort data from our Phase 1 study of XmAb819 for the treatment of advanced clear cell renal cell carcinoma at a medical meeting in the second half of 2026, which will help support the initiation of our first pivotal study planned for 2027," said Bassil Dahiyat, Ph.D., president and chief executive officer at Xencor. "Our TL1A pipeline continues to advance with strong enrollment in the global Phase 2b XENITH-UC Study of XmAb942 in ulcerative colitis supported by investigator enthusiasm for its potential best-in-class profile in moderately to severely active ulcerative colitis. We expect to complete a blinded interim analysis around year-end 2026 and complete the primary endpoint analysis for the study’s 12-week induction period during the second half of 2027. We also look forward to initiating the first-in-human study of XmAb412, our novel TL1A x IL23p19 bispecific antibody, in the third quarter of 2026. XmAb412 utilizes our novel XenLock™ Fab domain platform, which enables multi-specific biologics designed to address the very stringent requirements for high potency, long half-life and low immunogenicity in the treatment of autoimmune and inflammatory disease." Wholly Owned Pipeline Overview XmAb819 (ENPP3 x CD3), a first-in-class, tumor-targeted T-cell engaging XmAb® 2+1 bispecific antibody in development for patients with advanced clear cell renal cell carcinoma (ccRCC). Xencor plans to present expansion cohort data from the ongoing Phase 1 study to define a recommended Phase 3 target dose at a medical conference in 2H26 and support initiation of a pivotal study of XmAb819 in ccRCC planned for 2027. Tumor expansion cohorts in ENPP3+ colorectal cancer (CRC), non-small cell lung cancer (NSCLC) and papillary renal cell carcinoma (pRCC) are open to enrollment. Xencor plans to initiate a sub-study in patients with advanced ccRCC who have not previously received treatment with a tyrosine kinase inhibitor (TKI) in 3Q26. XmAb541 (CLDN6 x CD3), a first-in-class, tumor-targeted T-cell engaging XmAb 2+1 bispecific antibody in Phase 1 clinical development for patients with advanced gynecologic and germ cell tumors. Xencor plans to present Phase 1 dose-escalation data to define a recommended Phase 3 target dose in 2H26 and evaluate plans for a pivotal study of XmAb541 during 2027. Additionally, Xencor is initiating a new clinical study to evaluate the combination of XmAb541 and XmAb808 (B7H3 x CD28) for patients with CLDN6+ high-grade serous ovarian cancer. XmAb808 is a bispecific antibody designed to provide conditional co-stimulation of T cells. Xencor presented a poster characterizing preclinical combinations of XmAb808 with multiple CD3 T cell engaging bispecific antibodies, including XmAb541, at the American Association for Cancer Research Annual Meeting in April 2026. XmAb942 (Xtend™ anti-TL1A), a potential best-in-class, high-potency, extended half-life antibody in development for patients with inflammatory bowel disease. Xencor is conducting the XENITH-UC Study, a global Phase 2b study of XmAb942 in ulcerative colitis (UC). XENITH-UC is a randomized, double-blind, placebo-controlled trial in patients with moderately to severely active UC, whose disease has progressed after at least one conventional or advanced therapy. Xencor presented final results from the Phase 1 dose-escalation study of XmAb942 in healthy participants at Digestive Disease Week® (DDW) in May 2026. All dose levels and routes of administration were well tolerated. XmAb942’s immunogenicity profile supports best-in-class drug exposure, and no impacts of anti-drug antibodies on safety or tolerability or on the population pharmacokinetic model were observed. The estimated terminal half-life of 74 days supports the single subcutaneous injection 12-week dosing interval used during the maintenance treatment period in XENITH-UC. Enrollment expectations support a XENITH-UC blinded interim analysis around year-end 2026 and reaching the primary endpoint of the 12-week induction period during the second half of 2027. The primary endpoint is percentage of patients achieving clinical remission defined by the modified Mayo score at week 12. XmAb412 (TL1A x IL23p19), a novel bispecific antibody format using the XenLock™ platform for dual targeting of inflammatory pathways in autoimmune and inflammatory disease. Xencor presented preclinical characterization of XmAb412 at DDW in May 2026. XmAb412 robustly suppresses both TL1A and IL-23 inflammatory pathways and is predicted to have a human half-life between 60 and 70 days. XmAb412 supports high-concentration, low viscosity and citrate-free formulation suitable for subcutaneous dosing. Xencor plans to initiate a first-in-human study of XmAb412 in 3Q26. Plamotamab (CD20 x CD3), a clinical-stage, B-cell depleting bispecific T-cell engager in Phase 1 development for patients with rheumatoid arthritis (RA), who have progressed through prior standard-of-care treatment. Xencor plans to provide an update on progress achieved in the Phase 1b study of plamotamab in RA in 2H26. XmAb657 (CD19 x CD3), a clinical-stage, potent, extended half-life B-cell depleting bispecific T-cell engager in Phase 1 dose escalation, enrolling healthy participants and patients with idiopathic inflammatory myopathies (IIM). Xencor plans to provide an update on progress achieved in the Phase 1 study of XmAb657 in 2H26. Financial Guidance: Based on current operating plans, Xencor expects to end 2026 with between $380 million and $400 million in cash, cash equivalents and marketable debt securities, and to have sufficient cash resources to fund research and development programs and operations into mid-2028. Financial Results for the First Quarter Ended March 31, 2026 Cash, cash equivalents and marketable debt securities totaled $541.8 million as of March 31, 2026, compared to $610.8 million as of December 31, 2025. Revenue for the first quarter ended March 31, 2026 was $4.5 million, compared to $32.7 million for the same period in 2025. Revenue earned in the first quarter of 2026 was primarily non-cash royalty revenue from Incyte and Alexion, compared to the same period in 2025, which was primarily non-cash royalty revenue from Alexion and Incyte and milestone revenue from Incyte and Vir. Revenue for the first quarter ended March 31, 2026 includes a one-time $6.6 million reduction due to royalties on disputed U.S. sales due from Alexion. Research and development (R&D) expenses for the first quarter ended March 31, 2026 were $64.7 million, compared to $58.6 million for the same period in 2025. Increased R&D spending for the first quarter of 2026 compared to 2025 is primarily due to increased spending on pipeline programs, partially offset by reduced lower stock-based compensation expense. General and administrative (G&A) expenses for the first quarter ended March 31, 2026 were $17.7 million, compared to $17.3 million for the same period in 2025. G&A spending for the first quarter 2026 compared to 2025 remained relatively consistent. Other expense, net, for the first quarter ended March 31, 2026 was $50.8 million, compared to $5.1 million for the same period in 2025. Increased other expense, net, for the first quarter of 2026, compared to 2025, is primarily due to unrealized losses on an equity security. Net loss attributable to Xencor for the first quarter ended March 31, 2026 was $128.9 million, or $(1.71) on a fully diluted per share basis, compared to net loss of $48.4 million, or $(0.66) on a fully diluted per share basis, for the same period in 2025. Upcoming Investor Conference Company management will present at the BofA Securities Health Care Conference on Tuesday, May 12, 2026 at 3:00 p.m. PDT. A live webcast of the presentation will be available under "Events & Presentations" in the Investors section of the Company’s website located at www.xencor.com. A replay of the event will be available on the Xencor website for at least 30 days following the presentation. About Xencor Xencor is a clinical-stage biopharmaceutical company developing engineered antibodies for the treatment of patients with cancer and autoimmune diseases. More than 20 candidates engineered with Xencor's XmAb® technology are in clinical development, and multiple XmAb medicines are marketed by partners. Xencor’s XmAb engineering technology enables small changes to a protein’s structure that result in new mechanisms of therapeutic action. For more information, please visit www.xencor.com. Forward-Looking Statements Certain statements contained in this press release may constitute forward-looking statements within the meaning of the "safe harbor" provisions of the Private Securities Litigation Reform Act of 1995. Forward-looking statements include statements that are not purely statements of historical fact, and can generally be identified by the use of words such as "potential," "can," "will," "plan," "may," "could," "would," "expect," "anticipate," "seek," "look forward," "believe," "committed," "investigational," "indicates," "supports," and similar terms, or by express or implied discussions relating to Xencor’s business, including, but not limited to, statements regarding our expectations regarding regulatory and partnership milestone achievements, clinical pipeline advancements, planned receipt and presentations of clinical data, including the expected timing thereof, and planned and ongoing clinical trials, including the expected timing thereof, projected financial resources and financial guidance, including estimated cash, cash equivalents and marketable debt securities at year end and cash runway for research and development programs and operations, expectations for and estimates of future royalty revenues, the quotations from Xencor's president and chief executive officer, and other statements that are not purely statements of historical fact. Such statements are made on the basis of the current beliefs, expectations, and assumptions of the management of Xencor and are subject to significant known and unknown risks, uncertainties and other factors that may cause actual results, performance or achievements and the timing of events to be materially different from those implied by such statements, and therefore these statements should not be read as guarantees of future performance or results. Such risks include, without limitation, the risks associated with the process of discovering, developing, manufacturing and commercializing drugs that are safe and effective for use as human therapeutics, the ability of publicly disclosed preliminary clinical trial data to support continued clinical development and regulatory approval for specific treatments, the risk of loss of key members of management, the risk that the fair value of our marketable equity securities will decline and the risks, uncertainties and other factors described under the heading "Risk Factors" in Xencor's Annual Report on Form 10-K for the year ended December 31, 2025 as well as Xencor's subsequent filings with the Securities and Exchange Commission. You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof. Xencor undertakes no obligation to revise or update these forward-looking statements to reflect events or circumstances after the date hereof, except as required by law. View source version on businesswire.com: https://www.businesswire.com/news/home/20260506934755/en/ Contacts For Investors: Charles Liles [email protected] (626) 737-8118 For Media: Cassidy McClain Inizio Evoke [email protected] (619) 694-6291

-- XmAb819, novel first-in-class ENPP3 x CD3 T-cell engaging bispecific antibody, Phase 1 dose expansion in CRC, NSCLC and pRCC open to enrollment; on track to present clinical data to support a recommended Phase 3 dose in ccRCC in 2H26 -- -- Final results from healthy-volunteer study of Xmb942, Xtend™ TL1A antibody, and preclinical characterization of XmAb412, TL1A x IL23p19 XmAb® bispecific antibody, to be presented at DDW 2026 -- PASADENA, Calif., February 25, 2026--(BUSINESS WIRE)--Xencor, Inc. (NASDAQ:XNCR), a clinical-stage biopharmaceutical company developing engineered antibodies for the treatment of cancer and autoimmune diseases, today reported financial results for the fourth quarter and full year ended December 31, 2025. "Xencor’s lead oncology drug candidate is XmAb819, a novel first-in-class T-cell engager that could offer a much-needed new therapeutic modality for patients with advanced clear cell renal cell carcinoma (ccRCC). Excitement from the clinical community on our initial data from the dose-escalation study presented during ENA 2025 supports achieving our goal of presenting dose-expansion data during a medical meeting in the second half of 2026 and our plans to initiate a pivotal study during 2027," said Bassil Dahiyat, Ph.D., president and chief executive officer at Xencor. "Building on the early success in ccRCC, we recently opened additional dose expansion cohorts in other tumor types that have high ENPP3 expression: colorectal cancer, non-small cell lung cancer and papillary renal cell carcinoma." "In 2026, we plan to present additional key clinical data and progress updates as we also advance XmAb541 and our ongoing B-cell depleting autoimmune programs, respectively. Our TL1A pipeline in inflammatory bowel disease continues to advance, as well. We are making great progress with enrollment in our Phase 2b XENITH-UC study of XmAb942 and are excited to begin the first-in-human study of XmAb412, our novel TL1A x IL23p19 bispecific antibody in the second half of 2026. We are proud of our execution across an evolved clinical pipeline and of the Xencor team’s focus on designing proteins to deliver novel medicines for patients." Wholly Owned Pipeline Overview XmAb819 (ENPP3 x CD3), a first-in-class, tumor-targeted T-cell engaging XmAb® 2+1 bispecific antibody in development for patients with advanced clear cell renal cell carcinoma (ccRCC). The dose-expansion portion of the ongoing Phase 1 study is enrolling patients and dose-optimization continues. Tumor expansion cohorts in colorectal cancer (CRC), non-small cell lung cancer (NSCLC) and papillary renal cell carcinoma (pRCC) are now open to enrollment. Xencor plans to present new clinical data to support a recommended Phase 3 dose in 2H26 and initiate a pivotal study of XmAb819 in ccRCC during 2027. XmAb541 (CLDN6 x CD3), a first-in-class, tumor-targeted T-cell engaging XmAb 2+1 bispecific antibody in Phase 1 clinical development for patients with advanced gynecologic and germ cell tumors. Xencor plans to present new clinical data to support a recommended Phase 3 dose in 2H26 and evaluate plans for a pivotal study of XmAb541 during 2027. XmAb942 (Xtend™ anti-TL1A), a potential best-in-class, high-potency, extended half-life antibody in development for patients with inflammatory bowel disease. Xencor is conducting the global XENITH-UC Study, a Phase 2b study of XmAb942 in ulcerative colitis (UC). XENITH-UC is a randomized, double-blind, placebo-controlled trial in patients with moderate-to-severe UC, whose disease has progressed after at least one conventional or advanced therapy. Xencor is on-track to present final results from the Phase 1 study of XmAb942 in healthy volunteers in a poster titled "XmAb942, a Potential Best-in-class, Long-acting Anti-TL1A Antibody for the Treatment of Inflammatory Bowel Disease: Phase 1 Final Results" at Digestive Disease Week® (DDW), being held May 2-5, 2026 in Chicago and online, and to provide an update on progress achieved in the XENITH-UC study around year-end 2026. XmAb412 (TL1A x IL23p19), a bispecific antibody for dual targeting of important inflammatory pathways in autoimmune and inflammatory disease, while avoiding the complexities of dosing and formulary access for two separate TL1A and IL23 targeted drugs. Xencor is on track to present the preclinical characterization of XmAb412 in a poster titled "Discovery and Characterization of XmAb412: A Novel, High-Affinity, Anti-TL1A x Anti-IL23 Native-like Bispecific Antibody With Extended Half-life for the Treatment of Inflammatory Bowel Disease" at DDW in May 2026 and to initiate a first-in-human study of XmAb412 in 2H26. Plamotamab (CD20 x CD3), a clinical-stage, B-cell depleting bispecific T-cell engager in Phase 1 development for patients with rheumatoid arthritis (RA), who have progressed through prior standard-of-care treatment. Xencor plans to provide an update on progress achieved in the Phase 1b study of plamotamab in RA in 2H26. XmAb657 (CD19 x CD3), a clinical-stage, potent, extended half-life B-cell depleting bispecific T-cell engager in Phase 1 development for patients with idiopathic inflammatory myopathies (IIM). Xencor plans to provide an update on progress achieved in the Phase 1 study of XmAb657 in 2H26. XmAb808 (B7-H3 x CD28), a bispecific antibody designed to provide conditional co-stimulation of T cells when also bound to tumor cells. Xencor plans to present a poster characterizing preclinical combinations of XmAb808 with multiple CD3 T cell engaging bispecific antibodies at a medical meeting in 1H26. Xtend U.S. Patent Term Extension: In December 2025, Xencor announced the issuance of U.S. Patent 12,492,253, which covers Xencor’s Xtend Fc domain for extending the half-life of antibodies targeting C5, with a term that extends into December 2028. Xencor anticipates receiving low-single digit royalties on net sales of Ultomiris® (ravulizumab-cwvz), an anti-C5 antibody engineered with a licensed Xtend Fc domain, into December 2028 in the United States. Ultomiris is a drug being developed and commercialized by Alexion Pharmaceuticals, Inc., and is a registered trademark of Alexion. Xencor previously secured regulatory extensions of exclusivity in several EU countries, Japan and Australia. Based upon consensus sales forecasts, Xencor estimates recognizing potential royalty revenue in excess of the caps under its royalty agreement with OMERS in the range of $100 million to $120 million in aggregate for the extended patent term through 2028. Financial Guidance: Based on current operating plans, Xencor expects to end 2026 with between $400 million and $430 million in cash, cash equivalents and marketable debt securities, and to have sufficient cash resources to fund research and development programs and operations through 2028. Financial Results for the Fourth Quarter and Full Year Ended December 31, 2025 Cash, cash equivalents, and marketable debt securities totaled $610.8 million as of December 31, 2025 compared to $706.7 million as of December 31, 2024. Total revenue for the fourth quarter ended December 31, 2025 was $28.2 million compared to $52.8 million for the same period in 2024. Revenue for the full year ended December 31, 2025 was $125.6 million compared to $110.5 million for the same period in 2024. The increase in revenue in 2025 compared to 2024 was primarily driven by revenue recognition associated with Alexion and Incyte license agreements. Research and development (R&D) expenses for the fourth quarter ended December 31, 2025 were $64.8 million compared to $51.1 million for the same period in 2024. R&D expenses for the full year ended December 31, 2025 were $239.4 million compared to $227.7 million for the same period in 2024. Increased R&D expenses in 2025 compared to 2024 were primarily driven by higher external and internal costs associated with pipeline programs, partially offset by lower stock-based compensation expense. General and administrative (G&A) expenses for the fourth quarter ended December 31, 2025 were $17.0 million compared to $14.9 million for the same period in 2024. G&A expenses for the full year ended December 31, 2025 were $63.6 million compared to $61.2 million for the same period in 2024. G&A expenses in 2025 compared to 2024 remained relatively consistent. Other income, net for the fourth quarter ended December 31, 2025 was $49.4 million compared to other expense, net of $31.4 million for the same period in 2024. Other income, net for the full year ended December 31, 2025 was $87.9 million compared to other expense, net of $56.5 million in the same period in 2024. Other income, net, in 2025 compared to other expense, net, in 2024 was primarily driven by a combination of realized and unrealized gains from marketable equity securities. Net loss attributable to Xencor for the fourth quarter ended December 31, 2025 was $6.7 million or $(0.09) on a fully diluted per share basis compared to net loss of $45.6 million or $(0.62) on a fully diluted per share basis, for the same period in 2024. For the full year ended December 31, 2025 net loss attributable to Xencor was $91.9 million or $(1.24) on a fully diluted per share basis compared to net loss of $232.6 million or $(3.58) on a fully diluted per share basis, for the same period in 2024. About Digestive Disease Week® Digestive Disease Week® (DDW) is the largest international gathering of physicians, researchers, and academics in the fields of gastroenterology, hepatology, endoscopy, and gastrointestinal surgery. Jointly sponsored by the American Association for the Study of Liver Diseases (AASLD), the American Gastroenterological Association (AGA), the American Society for Gastrointestinal Endoscopy (ASGE), and the Society for Surgery of the Alimentary Tract (SSAT), DDW is an in-person and online meeting. Digestive Disease Week® is a registered trademark of DDW, LLC. About Xencor Xencor is a clinical-stage biopharmaceutical company developing engineered antibodies for the treatment of patients with cancer and autoimmune diseases. More than 20 candidates engineered with Xencor's XmAb® technology are in clinical development, and multiple XmAb medicines are marketed by partners. Xencor's XmAb engineering technology enables small changes to a protein’s structure that result in new mechanisms of therapeutic action. For more information, please visit www.xencor.com. Forward-Looking Statements Certain statements contained in this press release may constitute forward-looking statements within the meaning of the "safe harbor" provisions of the Private Securities Litigation Reform Act of 1995. Forward-looking statements include statements that are not purely statements of historical fact, and can generally be identified by the use of words such as "potential," "can," "will," "plan," "may," "could," "would," "expect," "anticipate," "seek," "look forward," "believe," "committed," "investigational," "indicates," "supports," and similar terms, or by express or implied discussions relating to Xencor’s business, including, but not limited to, statements regarding our expectations regarding regulatory and partnership milestone achievements, clinical pipeline advancements , planned receipt and presentations of clinical data, including the expected timing thereof, and planned and ongoing clinical trials, including the expected timing thereof, projected financial resources and financial guidance, including estimated cash, cash equivalents and marketable debt securities at year end and cash runway for research and development programs and operations, expectations for and estimates of future royalty revenues, the quotations from Xencor's president and chief executive officer, and other statements that are not purely statements of historical fact. Such statements are made on the basis of the current beliefs, expectations, and assumptions of the management of Xencor and are subject to significant known and unknown risks, uncertainties and other factors that may cause actual results, performance or achievements and the timing of events to be materially different from those implied by such statements, and therefore these statements should not be read as guarantees of future performance or results. Such risks include, without limitation, the risks associated with the process of discovering, developing, manufacturing and commercializing drugs that are safe and effective for use as human therapeutics, the ability of publicly disclosed preliminary clinical trial data to support continued clinical development and regulatory approval for specific treatments, the risk of loss of key members of management, the risk that the fair value of our marketable equity securities will decline and the risks, uncertainties and other factors described under the heading "Risk Factors" in Xencor's Annual Report on Form 10-K for the year ended December 31, 2025 as well as Xencor's subsequent filings with the Securities and Exchange Commission. You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof. Xencor undertakes no obligation to revise or update these forward-looking statements to reflect events or circumstances after the date hereof, except as required by law. View source version on businesswire.com: https://www.businesswire.com/news/home/20260225902842/en/ Contacts For Investors: Charles Liles [email protected] (626) 737-8118 For Media: Cassidy McClain Inizio Evoke [email protected] (619) 694-6291

Xencor (XNCR) just shared its third quarter earnings, revealing a sharp reduction in net loss compared to a year ago. Investors are paying close attention as the company’s financial turnaround continues to take shape. See our latest analysis for Xencor. Xencor’s dramatic improvement in net losses seems to have caught the market’s eye. Its share price has climbed 82% over the past 90 days. That momentum follows a tough year, as the 12-month total shareholder return remains deeply negative, but recent earnings events may be shifting sentiment and fueling hopes for a turnaround. If you’re tracking Xencor’s rebound and want to spot other healthcare innovators on the move, you can explore the sector further with our hand-picked See the full list for free.. Given Xencor’s recent surge, is the market still underestimating its turnaround story? Or has the swift rally already priced in all the company’s future growth, leaving little room for new upside? Xencor’s most widely followed narrative sees the stock trading well below what the consensus considers fair value, given its current price of $13.99. The narrative’s fair value estimate lands at $27.64, suggesting a notable gap between market sentiment and analysts’ long-term earnings outlook. Read the complete narrative. What is the real engine behind this optimistic valuation? Explore a forecast built on ambitious future margins and a potential profit leap that could spark a total re-rating. This narrative contains some eye-opening expectations. Are you ready to uncover the fulcrums driving Xencor’s price target? Result: Fair Value of $27.64 (UNDERVALUED) Have a read of the narrative in full and understand what's behind the forecasts. However, doubts remain because key clinical trials still need to deliver robust results, and delays or a lack of conclusive data could dampen future optimism. Find out about the key risks to this Xencor narrative. If you have a different perspective or want to dive deeper into the numbers, you can easily craft your personal Xencor story in just minutes: Do it your way. A great starting point for your Xencor research is our analysis highlighting 1 key reward and 2 important warning signs that could impact your investment decision. Why stop with Xencor when there are so many promising opportunities across the market? See what you could be missing out on and give your portfolio an extra edge using these focused stock screens: Capture strong yields and a steady income stream by targeting these 15 dividend stocks with yields > 3% offering consistently high payouts above 3%. Power up your investments alongside innovators shaping medicine and tech with these 31 healthcare AI stocks that blend artificial intelligence and healthcare breakthroughs. Boost your growth strategy by zeroing in on these 874 undervalued stocks based on cash flows where the market may be mispricing solid fundamentals and future cash flows. This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned. Companies discussed in this article include XNCR. Have feedback on this article? Concerned about the content? Get in touch with us directly. Alternatively, email [email protected]

PASADENA, Calif., November 05, 2025--(BUSINESS WIRE)--Xencor, Inc. (NASDAQ:XNCR), a clinical-stage biopharmaceutical company developing engineered antibodies for the treatment of cancer and autoimmune diseases, today reported financial results for the third quarter ended September 30, 2025 and provided recent business and clinical program updates. "Xencor’s two novel, first-in-class, CD3 T-cell engaging bispecific antibodies, XmAb819 and XmAb541, have demonstrated compelling clinical data in advanced clear cell renal cell carcinoma and advanced gynecologic and germ cell tumors, respectively. As we continue to advance through dose escalation and cohort expansions in Phase 1 studies evaluating these programs, we expect to identify recommended Phase 3 doses during 2026 to support initiation of pivotal studies during 2027," said Bassil Dahiyat, Ph.D., president and chief executive officer at Xencor. "The accelerating tempo of clinical development extends to our autoimmune portfolio. In the third quarter we dosed the first patient in our Phase 2b XENITH-UC study of XmAb942, our potential best-in-class antibody targeting TL1A for inflammatory bowel disease, to rapidly identify a pivotal dose regimen for those with moderately to severely active ulcerative colitis, and we dosed the first patient in our Phase 1b study of plamotamab in rheumatoid arthritis. We remain on-track to start clinical studies of XmAb657, our B-cell depleting TCE for the treatment of patients with autoimmune disease by year end 2025, and our lead TL1A x IL23p19 bispecific antibody, now designated XmAb412, in 2026." Clinical Program Updates Oncology XmAb819 (ENPP3 x CD3), a novel, first-in-class, tumor-targeted T-cell engaging XmAb® 2+1 bispecific antibody in development for patients with advanced clear cell renal cell carcinoma (ccRCC). The first dose-expansion cohort in the ongoing Phase 1 study is enrolling patients as dose-escalation continues. Xencor plans to select a recommended Phase 3 dose during 2026 to support initiation of a pivotal study in advanced ccRCC during 2027. At the AACR-NCI-EORTC Conference on Molecular Targets and Cancer Therapeutics in October 2025, Xencor presented initial results from the ongoing Phase 1 dose-escalation study of XmAb819. As of the data cut-off, 69 patients had received XmAb819 across 15 dose cohorts; patients were heavily pre-treated, having received a median of 4 prior lines of therapy. All patients received prior anti-PD1 therapy and prior VEGF-TKI therapy, and 36% of patients were previously treated with a HIF2α inhibitor. XmAb819 demonstrated evidence of anti-tumor activity and an acceptable safety profile that was generally well tolerated across dose levels. Of the 20 efficacy-evaluable patients treated at the dose levels that were preclinically predicted to be within the target dose range, 25% achieved a partial response (PR, per RECIST v1.1) as best response with a 70% disease control rate. The most common treatment-emergent adverse events (AEs) were cytokine release syndrome, rash and gastrointestinal-related toxicities that were primarily Grade 1 or 2 in severity and predominantly associated with prime-step dosing in the first four weeks of treatment. No cases of treatment-related immune effector cell-associated neurotoxicity syndrome (ICANS) were observed. No Grade 5 events were reported. Four patients (6%) were dose-reduced due to treatment-related AEs, and three patients (4%) discontinued treatment due to treatment-related AEs. XmAb541 (CLDN6 x CD3), a novel, first-in-class, tumor-targeted T-cell engaging XmAb 2+1 bispecific antibody in development for patients with advanced gynecologic and germ cell tumors. Xencor plans to select a recommended Phase 3 dose during 2026 to support initiation of a pivotal study during 2027. In October 2025, Xencor presented early efficacy data from a cohort in the ongoing Phase 1 dose-escalation study of XmAb541, ahead of previously guided timelines to begin characterizing target dose range cohorts by year-end 2025. As of the data cut-off, nine patients received XmAb541 in the most recently completed escalation cohort. Confirmed partial responses per RECIST v1.1 were observed in three patients: one patient with ovarian cancer and two patients with germ cell tumors. Autoimmune & Inflammatory Diseases Plamotamab (CD20 x CD3), a clinical-stage, B-cell depleting bispecific T-cell engager in development for patients with rheumatoid arthritis (RA). Xencor is evaluating plamotamab in a Phase 1b proof-of-concept study, for patients with RA who have progressed through prior standard-of-care treatment. The first patient has been dosed in the study, and enrollment is ongoing. XmAb942 (Xtend™ anti-TL1A), a potential best-in-class, high-potency, extended half-life antibody in development for patients with inflammatory bowel disease. Xencor is conducting the global XENITH-UC Study, a Phase 2b study of XmAb942 in ulcerative colitis (UC). XENITH-UC is a randomized, double-blind, placebo-controlled trial in patients with moderate-to-severe UC, whose disease has progressed after at least one conventional or advanced therapy. Patient enrollment in the study is ongoing. Recent Partnership Developments Amgen: Amgen initiated the Phase 3 XALience study of xaluritamig, a STEAP1 x CD3 XmAb 2+1 bispecific T-cell engager, in combination with abiraterone versus investigator’s choice therapy in patients with chemotherapy-naïve metastatic castration-resistant prostate cancer. XALute, a Phase 3 monotherapy study of xaluritamig in patients who have previously been treated with taxane-based chemotherapy, is enrolling. Amgen is exploring xaluritamig in other combinations and in earlier stages of prostate cancer with multiple Phase 1b studies ongoing. Xencor is eligible to receive $225 million in future milestone payments and tiered royalties on net sales that range from mid- to high-single digit percentages. Astellas: In October 2025, the first clinical data from Astellas’ investigational Claudin18.2-targeted, XmAb 2+1 bispecific CD3 T-cell engager, ASP2138, both as a monotherapy and in combination with standard of care therapies, were presented during the European Society for Medical Oncology congress in Berlin. Astellas is advancing ASP2138 for the treatment of patients with gastric, gastroesophageal junction and pancreatic cancers, and Astellas has announced that planning is ongoing to potentially initiate registrational studies. ASP2138 utilizes the XmAb 2+1 multivalent format to enable activation of T cells against Claudin-18.2 expressing tumor cells. Xencor is eligible to receive $232.5 million in future milestone payments and tiered royalties on net sales that range from high-single to low-double digit percentages. Zenas Biopharma: In October 2025, Zenas announced positive results from the Phase 2 MoonStone trial of obexelimab in relapsing multiple sclerosis, in which the primary endpoint of the study was met. Zenas announced it expects to report topline results for the pivotal study of obexelimab in IgG4-Related Disease around year-end with additional readouts through mid-2026. Obexelimab targets CD19 with its variable domain and uses an XmAb Immune Inhibitor Fc Domain. In November 2021, Xencor licensed obexelimab to Zenas. Xencor is eligible to receive $460 million in future milestone payments and tiered royalties on net sales that range from mid-single-digit to mid-teen percentages, dependent on geography. As of September 30, 2025, Xencor owns 3,098,380 shares of common stock in Zenas. Financial Guidance: Based on current operating plans, Xencor expects to end 2025 with between $570 million and $590 million in cash, cash equivalents and marketable debt securities, and to have cash to fund research and development programs and operations into 2028. Financial Results for the Third Quarter Ended September 30, 2025 Cash, cash equivalents and marketable debt securities totaled $633.9 million as of September 30, 2025, compared to $706.7 million as of December 31, 2024. Revenue for the third quarter ended September 30, 2025 was $21.0 million, compared to $17.8 million for the same period in 2024. Revenue earned in the third quarters of 2025 and 2024 was primarily non-cash royalty revenue from Alexion and Incyte. Research and development (R&D) expenses for the third quarter ended September 30, 2025 were $54.4 million, compared to $58.2 million for the same period in 2024. Decreased R&D spending for the third quarter of 2025 compared to 2024 reflects lower stock-based compensation and lower costs related to programs that are winding down or have been terminated. General and administrative (G&A) expenses for the third quarter ended September 30, 2025 were $14.2 million, compared to $14.8 million for the same period in 2024. G&A spending for the third quarter of 2025 remained relatively consistent compared to the same period in 2024. Other income, net, for the third quarter ended September 30, 2025 was $41.5 million, compared to $7.8 million for the same period in 2024. The increase for the third quarter of 2025, compared to 2024, is primarily driven by unrealized gains from marketable equity securities. Net loss attributable to Xencor for the third quarter ended September 30, 2025 was $6.0 million, or $(0.08) on a fully diluted per share basis, compared to net loss of $46.3 million, or $(0.72) on a fully diluted per share basis, for the same period in 2024. About Xencor Xencor is a clinical-stage biopharmaceutical company developing engineered antibodies for the treatment of patients with cancer and autoimmune diseases. More than 20 candidates engineered with Xencor's XmAb® technology are in clinical development, and multiple XmAb medicines are marketed by partners. Xencor's XmAb engineering technology enables small changes to a protein’s structure that result in new mechanisms of therapeutic action. For more information, please visit www.xencor.com. Forward-Looking Statements Certain statements contained in this press release may constitute forward-looking statements within the meaning of the "safe harbor" provisions of the Private Securities Litigation Reform Act of 1995. Forward-looking statements include statements that are not purely statements of historical fact, and can generally be identified by the use of words such as "potential," "can," "will," "plan," "may," "could," "would," "expect," "anticipate," "seek," "look forward," "believe," "committed," "investigational," "indicates," "supports," and similar terms, or by express or implied discussions relating to Xencor’s business, including, but not limited to, statements regarding expectations for clinical progress, planned presentations of clinical data, new XmAb candidates and programs, planned and in process clinical trials, financial guidance, the quotations from Xencor's president and chief executive officer, and other statements that are not purely statements of historical fact. Such statements are made on the basis of the current beliefs, expectations, and assumptions of the management of Xencor and are subject to significant known and unknown risks, uncertainties and other factors that may cause actual results, performance or achievements and the timing of events to be materially different from those implied by such statements, and therefore these statements should not be read as guarantees of future performance or results. Such risks include, without limitation, the risks associated with the process of discovering, developing, manufacturing and commercializing drugs that are safe and effective for use as human therapeutics, the ability of publicly disclosed preliminary clinical trial data to support continued clinical development and regulatory approval for specific treatments, the risk of loss of key members of management, the risk that the fair value of our marketable equity securities will decline and the risks, uncertainties and other factors described under the heading "Risk Factors" in Xencor's annual report on Form 10-K for the year ended December 31, 2024 as well as Xencor's subsequent filings with the Securities and Exchange Commission. You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof. Xencor undertakes no obligation to revise or update these forward-looking statements to reflect events or circumstances after the date hereof, except as required by law. View source version on businesswire.com: https://www.businesswire.com/news/home/20251105353167/en/ Contacts Charles Liles [email protected] (626) 737-8118 For media: Cassidy McClain Inizio Evoke [email protected] (619) 694-6291

Xencor (XNCR) recently shared initial results from its ongoing Phase 1 trial of XmAb819, a new bispecific antibody, in advanced renal cell carcinoma. The announcement at a major oncology conference has prompted investors to take notice. See our latest analysis for Xencor. Xencor’s announcement of early data on XmAb819 appears to have reignited some optimism after a tough stretch, with the shares up 23% over the past month and surging more than 63% in the last 90 days, even as the year-to-date share price return is still well in the red. Long-term holders are still facing a negative 33.9% total shareholder return over the past year, and the five-year picture remains deeply underwater, but recent momentum suggests the market is re-evaluating Xencor’s prospects as the pipeline matures. If breakthrough biotech updates spark your interest, consider exploring more companies in the sector using our healthcare stock discovery tool: See the full list for free. With shares rebounding sharply following early clinical data, the question now is whether Xencor remains undervalued compared to analyst targets or if the recent run-up means future growth is already accounted for. Compared to Xencor’s latest closing price of $14.25, the narrative’s fair value sits substantially higher. This prompts attention from those watching for a turnaround and sets the stage for a closer look at what could be driving such a valuation gap. Read the complete narrative. Want to unlock the bold math behind this valuation? The price target is powered by ambitious margin moves and an aggressive profit future you might not expect from a biotech turnaround. Intrigued by what assumptions drive such dramatic upside? Discover the key drivers fueling this optimistic view. Result: Fair Value of $25.73 (UNDERVALUED) Have a read of the narrative in full and understand what's behind the forecasts. However, significant delays in late-stage trials or failure to demonstrate clear product differentiation could quickly undermine the current optimism surrounding Xencor’s outlook. Find out about the key risks to this Xencor narrative. If you have a different take or want to shape your own perspective, it only takes a few minutes to explore the underlying data and build a fresh view. Do it your way. A great starting point for your Xencor research is our analysis highlighting 1 key reward and 2 important warning signs that could impact your investment decision. You owe it to your portfolio not to settle. Power up your research with handpicked lists of stocks designed for growth, innovation, and solid returns. Spot untapped growth by targeting these 864 undervalued stocks based on cash flows with prices that signal genuine potential for strong future performance. Jumpstart your exposure to the digital frontier by following these 81 cryptocurrency and blockchain stocks driving real-world change across fintech and blockchain ecosystems. Boost your long-term income potential by tapping into these 21 dividend stocks with yields > 3% that consistently deliver robust yields above 3%. This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned. Companies discussed in this article include XNCR. Have feedback on this article? Concerned about the content? Get in touch with us directly. Alternatively, email [email protected]

PASADENA, Calif., October 21, 2025--(BUSINESS WIRE)--Xencor, Inc. (NASDAQ:XNCR), a clinical-stage biopharmaceutical company developing engineered antibodies for the treatment of cancer and autoimmune diseases, will host a conference call and webcast on Friday, October 24 at 1:30 p.m. ET (10:30 a.m. PT) to discuss initial results from the ongoing Phase 1 dose-escalation study of XmAb819, an ENPP3 x CD3 T-cell engaging bispecific antibody, in development for patients with advanced clear cell renal cell carcinoma. The live webcast of the conference call may be accessed through this link and through "Events & Presentations" in the Investors section of the Company’s website, located at investors.xencor.com. A recording will be available for at least 30 days. The results will be presented at the AACR-NCI-EORTC Conference on Molecular Targets and Cancer Therapeutics in Boston, Massachusetts, during Poster Session B on Friday, October 24 from 12:30 to 4:00 p.m. ET in a poster titled "Preliminary Phase 1 safety and antitumor activity of XmAb819, a first-in-class ENPP3 x CD3 bispecific antibody, in patients with advanced clear cell renal cell carcinoma (ccRCC)." About XmAb819 XmAb819 is a first-in-class, tumor-targeted, T-cell engaging XmAb 2+1 bispecific antibody in development for patients with clear cell renal cell carcinoma (ccRCC). XmAb819 engages the immune system and activates T cells for highly potent and targeted lysis of tumor cells expressing ENPP3, an antigen highly expressed on kidney cancers. ENPP3 is a differentially expressed target, with high level expression in renal cell carcinoma (RCC) and low-level expression on normal tissues. With two tumor-antigen binding domains and one T-cell binding domain, Xencor’s XmAb® 2+1 format enables antibodies to bind more avidly and selectively kill tumor cells with higher antigen density, potentially sparing normal cells. Xencor is conducting a Phase 1 study to evaluate XmAb819 in patients with advanced ccRCC. About Xencor Xencor is a clinical-stage biopharmaceutical company developing engineered antibodies for the treatment of patients with cancer and autoimmune diseases. More than 20 candidates engineered with Xencor's XmAb® technology are in clinical development, and multiple XmAb medicines are marketed by partners. Xencor's XmAb engineering technology enables small changes to a protein’s structure that result in new mechanisms of therapeutic action. For more information, please visit www.xencor.com. Forward-Looking Statements Certain statements contained in this press release may constitute forward-looking statements within the meaning of applicable securities laws. Forward-looking statements include statements that are not purely statements of historical fact, and can generally be identified by the use of words such as "potential," "can," "will," "plan," "may," "could," "would," "expect," "anticipate," "seek," "look forward," "believe," "committed," "investigational," "indicates," "supports," and similar terms, or by express or implied discussions relating to Xencor’s business, including, but not limited to, statements regarding expectations for clinical progress, planned presentations of clinical data, planned and in process clinical trials, and other statements that are not purely statements of historical fact. Such statements are made on the basis of the current beliefs, expectations, and assumptions of the management of Xencor and are subject to significant known and unknown risks, uncertainties and other factors that may cause actual results, performance or achievements and the timing of events to be materially different from those implied by such statements, and therefore these statements should not be read as guarantees of future performance or results. Such risks include, without limitation, the risks associated with the process of discovering, developing, manufacturing and commercializing drugs that are safe and effective for use as human therapeutics and other risks, including the ability of publicly disclosed preliminary clinical trial data to support continued clinical development and regulatory approval for specific treatments and the risks, uncertainties and other factors described under the heading "Risk Factors" in Xencor's annual report on Form 10-K for the year ended December 31, 2024 as well as Xencor's subsequent filings with the Securities and Exchange Commission. You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof. This caution is made under the safe harbor provisions of the Private Securities Litigation Reform Act of 1995, as amended to date. All forward-looking statements are qualified in their entirety by this cautionary statement and Xencor undertakes no obligation to revise or update these forward-looking statements to reflect events or circumstances after the date hereof, except as required by law. View source version on businesswire.com: https://www.businesswire.com/news/home/20251020540696/en/ Contacts Charles Liles [email protected] (626) 737-8118