Regeneron Highlights Expanding Immunology Portfolio and Pipeline at AAAAI, Showcasing Novel Approaches to Treating Allergy

36 abstracts to be presented across Regeneron-invented therapies, including first-time Phase 3 presentations for two distinct investigational allergen-blocking antibodies for cat and birch allergies

New Dupixent®(dupilumab)data highlight its clinical and real-world impact across dermatological, respiratory and gastrointestinal diseases, including analyses of food allergy sensitization in children with atopic dermatitis

TARRYTOWN, N.Y., Feb. 10, 2026 (GLOBE NEWSWIRE) -- Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) today announced 36 abstracts across its immunology and inflammation portfolio and pipeline will be presented at the 2026 American Academy of Allergy, Asthma and Immunology (AAAAI) Annual Meeting being held February 27 to March 2 in Philadelphia, Pennsylvania. Highlights include the first presentations from the novel Phase 3 allergen-specific programs demonstrating the potential of a first-in-class approach to addressing burdensome ocular symptoms in adults with cat and birch allergies. New Dupixent®(dupilumab) analyses across dermatological, respiratory and gastrointestinal diseases will also be presented in collaboration with Sanofi.

“At Regeneron, we are pioneering new approaches to treating allergic diseases, and at AAAAI we will present for the first time Phase 3 data from two potentially first-in-class treatments for cat and birch allergies invented by Regeneron scientists that have the potential to change the paradigm for treatment of allergic diseases. Based on these data, we will embark on additional registration-enabling trials this year,” said Boaz Hirshberg, M.D., Senior Vice President, Clinical Development, Internal Medicine at Regeneron. “We are also sharing new insights on Dupixent, another drug invented by Regeneron scientists and currently the most widely used innovative branded antibody medicine. These results highlight the potential of Dupixent to further evolve the treatment paradigms of several chronic diseases, including asthma, certain allergic fungal diseases and allergies in children with atopic dermatitis. Together, these data represent our continued commitment to translate scientific insights into therapeutic breakthroughs across immunology and inflammation.”

First-in-class potential for targeted antibody treatments in cat and birch allergies in “ocular challenge”atrialsPresented for the first time will beresultsfrom separate Phase 3 cat and birch allergen-challenge trials, which evaluated antibody cocktails that target the most dominant allergens—FelD1 for cat allergy and BetV1 for birch allergy. The trials assessed the ability of these therapies to reduce ocular allergic symptoms, such as ocular itch and conjunctival redness, in response to antigen challenge, as well as skin prick reactivity one week after treatment, compared to placebo. The results add to data from earlier trials demonstrating the effects of these cocktails on nasal, respiratory and skin endpoints in these patients.

Additional registration-enabling trials for both programs that evaluate similar endpoints but after longer follow-up are initiating this year. The cat and birch allergy programs are part of a broader allergy pipeline, which include innovative strategies with the goal of eliminating all IgE-mediated allergies. The safety and efficacy of these investigational medicines have not been evaluated by any regulatory authority.

New Dupixent insights on allergy sensitization, asthma treatment escalation and potential in AFRSThe impact of early and sustained Dupixent treatment on allergy sensitization in children will be shared in two new long-term analyses from a Phase 3 open-label extension trial in children with moderate-to-severe atopic dermatitis. In the separate analyses, IgE levels for common food and environmental allergies were measured throughout the course of Dupixent treatment for up to 1.5 years. These included IgE levels for egg white, peanut, cow’s milk, wheat, dust mite, plant or fungal/bacterial allergens.

In adults and adolescents with asthma, two real-world analyses will also be shared evaluating the potential of moving Dupixent earlier in the treatment paradigm. The analyses measured reduction of exacerbations and systemic corticosteroid use in patients uncontrolled on medium-dose inhaled corticosteroids (ICS), comparing the addition of Dupixent with escalating to high-dose inhaled corticosteroids or the addition of other biologics.

Additionally, late-breaking data from the Phase 3 AIMS trial in adults and children aged 6 years and older with allergic fungal rhinosinusitis (AFRS) will be presented. These data formed the basis for a supplemental Biologics License Application (sBLA) in the U.S., which is currently underPriority Reviewwith a target action date of February 28, 2026. The safety and efficacy of Dupixent in AFRS have not been fully evaluated by any regulatory authority.

The full list of Regeneron allergy presentations at AAAAI includes:

The full list of Regeneron and Sanofi Dupixent presentations at AAAAI includes:

About Regeneron'sVelocImmuneTechnologyRegeneron'sVelocImmunetechnology utilizes a proprietary genetically engineered mouse platform endowed with a genetically humanized immune system to produce optimized fully human antibodies. When Regeneron's co-Founder, President and Chief Scientific Officer George D. Yancopoulos was a graduate student with his mentor Frederick W. Alt in 1985, they were the first toenvisionmaking such a genetically humanized mouse, and Regeneron has spent decades inventing and developingVelocImmuneand relatedVelociSuite®technologies. Dr. Yancopoulos and his team have usedVelocImmunetechnology to create a substantial proportion of all original, FDA-approved fully human monoclonal antibodies. This includes Dupixent®(dupilumab), Libtayo®(cemiplimab-rwlc), Praluent®(alirocumab), Kevzara®(sarilumab), Evkeeza®(evinacumab-dgnb), Inmazeb®(atoltivimab, maftivimab and odesivimab-ebgn) and Veopoz®(pozelimab-bbfg). In addition, REGEN-COV®(casirivimab and imdevimab) had been authorized by the FDA during the COVID-19 pandemic until 2024.

DUPIXENT is not usedto relieve sudden breathing problems and will not replace an inhaled rescue medicineorto treat any other forms of hives (urticaria).

Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements.

Especially tell your healthcare provider if youare taking oral, topical, or inhaled corticosteroid medicines; have asthma and use an asthma medicine; or have AD, CRSwNP, EoE, PN, COPD, CSU, or BP and also have asthma.Do notchange or stop your other medicines, including corticosteroid medicine or other asthma medicine, without talking to your healthcare provider. This may cause other symptoms that were controlled by those medicines to come back.

Tell your healthcare provider if you have any side effect that bothers you or that does not go away. These are not all the possible side effects of DUPIXENT. Call your doctor for medical advice about side effects. You are encouraged to report negative side effects of prescription drugs to the FDA. Visitwww.fda.gov/medwatch, or call 1-800-FDA-1088.

Use DUPIXENT exactly as prescribed by your healthcare provider. It’s an injection given under the skin (subcutaneous injection). Your healthcare provider will decide if you or your caregiver can inject DUPIXENT.Do nottry to prepare and inject DUPIXENT until you or your caregiver have been trained by your healthcare provider. In children 12 years of age and older, it’s recommended DUPIXENT be administered by or under supervision of an adult. In children 6 months to less than 12 years of age, DUPIXENT should be given by a caregiver.

About RegeneronRegeneron (NASDAQ: REGN) is a leading biotechnology company that invents, develops and commercializes life-transforming medicines for people with serious diseases. Founded and led by physician-scientists, our unique ability to repeatedly and consistently translate science into medicine has led to numerous approved treatments and product candidates in development, most of which were homegrown in our laboratories. Our medicines and pipeline are designed to help patients with eye diseases, allergic and inflammatory diseases, cancer, cardiovascular and metabolic diseases, neurological diseases, hematologic conditions, infectious diseases, and rare diseases.

Regeneron pushes the boundaries of scientific discovery and accelerates drug development using our proprietary technologies, such asVelociSuite,which produces optimized fully human antibodies and new classes of bispecific antibodies. We are shaping the next frontier of medicine with data-powered insights from the Regeneron Genetics Center®and pioneering genetic medicine platforms, enabling us to identify innovative targets and complementary approaches to potentially treat or cure diseases.

For more information, please visitwww.Regeneron.comor follow Regeneron onLinkedIn,Instagram,FacebookorX.

Regeneron Forward-Looking Statements and Use of Digital MediaThis press release includes forward-looking statements that involve risks and uncertainties relating to future events and the future performance of Regeneron Pharmaceuticals, Inc. (“Regeneron” or the “Company”), and actual events or results may differ materially from these forward-looking statements. Words such as “anticipate,” “expect,” “intend,” “plan,” “believe,” “seek,” “estimate,” variations of such words, and similar expressions are intended to identify such forward-looking statements, although not all forward-looking statements contain these identifying words. 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aTheconjunctival allergen challenge was conducted with the Ora Conjunctival Challenge Model (Ora-CAC®).