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Home›Companies›Regeneron Pharmaceuticals
Regeneron Pharmaceuticals logo

Regeneron Pharmaceuticals

Pushing the Bounds of Science
Tarrytown, NY, United States Biotech 12,000 employees Founded 1988 REGN regeneron.com ↗
8 Products & services
6 Licensed medicines
104 Clinical trials
2 Sites
12,000 Employees

About Regeneron Pharmaceuticals

Regeneron is a leading biotechnology company headquartered in Tarrytown, New York, inventing medicines in ophthalmology, immunology and oncology, with large-scale biologics manufacturing in Rensselaer, New York.

Sector
Biotech
Headquarters
Tarrytown, NY, United States
Founded
1988
Employees
12,000
Facilities
2 sites

Milestones

Milestones as listed on regeneron.com, checked 26 Sep 2026. Details can change; the linked page is the authoritative source.

1988
Regeneron founded by Leonard S. Schleifer
Founded by a neurologist and assistant professor at Cornell University Medical College.
Source: regeneron.com
1991
IPO on NASDAQ
The initial public offering raised $91.6 million.
Source: regeneron.com
1993
Manufacturing space acquired in Rensselaer, NY
Bought years before the company had an FDA-approved medicine.
Source: regeneron.com
2008
First FDA-approved medicine
Source: regeneron.com
2013
European business office opens in Dublin, Ireland
Source: regeneron.com
2014
Construction begins on first ex-US IOPS site in Limerick
The Regeneron Genetics Center also launched this year.
Source: regeneron.com
2020
COVID-19 antibody cocktail authorised for emergency use
The FDA also approved the company's Ebola treatment, its eighth FDA-approved medicine.
Source: regeneron.com
2026
FDA approves first gene therapy for congenital hearing loss
Treatment for people born with profound hearing loss.
Source: regeneron.com

Leadership Team

Leadership as listed on regeneron.com, checked 26 Sep 2026. Details can change; the linked page is the authoritative source.

Leonard S. Schleifer, MD, PhD

Board co-Chair, President and Chief Executive Officer
Source: regeneron.com

George D. Yancopoulos, MD, PhD

Board co-Chair, President and Chief Scientific Officer
Source: regeneron.com

Chris Fenimore

Executive Vice President, Finance and Chief Financial Officer
Source: regeneron.com

Joseph J. LaRosa

Executive Vice President, General Counsel and Secretary
Source: regeneron.com

Marion McCourt

Executive Vice President, Commercial
Source: regeneron.com

Daniel Van Plew

Executive Vice President and General Manager, Industrial Operations and Product Supply
Source: regeneron.com

Products & Services

Products and services as listed on regeneron.com, checked 26 Sep 2026. Details can change; the linked page is the authoritative source.

All Approved medicine Approved gene therapy
Approved medicine

DUPIXENT (dupilumab)

Injectable medicine listed among Regeneron's US-approved products.

Source: regeneron.com
Approved medicine

EYLEA HD / EYLEA (aflibercept)

Aflibercept injections listed among Regeneron's US-approved products.

Source: regeneron.com
Approved medicine

LIBTAYO (cemiplimab-rwlc)

Injectable medicine listed among Regeneron's US-approved products.

Source: regeneron.com
Approved medicine

PRALUENT (alirocumab)

Injectable medicine listed among Regeneron's US-approved products.

Source: regeneron.com
Approved medicine

KEVZARA (sarilumab)

Injectable medicine listed among Regeneron's US-approved products.

Source: regeneron.com
Approved medicine

EVKEEZA (evinacumab-dgnb)

Injectable medicine listed among Regeneron's US-approved products.

Source: regeneron.com
Approved medicine

LYNOZYFIC (linvoseltamab-gcpt)

Injectable medicine listed among Regeneron's US-approved products.

Source: regeneron.com
Approved gene therapy

OTARMENI (lunsotogene parvec-cwha)

Suspension listed among US-approved products; the history page notes FDA approval of Regeneron's first gene therapy, for hearing loss, in 2026.

Source: regeneron.com

Sites in Ireland

Limerick

Manufacturing

Ireland Industrial Operations and Product Supply site at Raheen Business Park.

Source: regeneron.com

Dublin

Office

European Business Office at One Warrington Place, Dublin 2.

Source: regeneron.com

Sites as listed on regeneron.com, checked 26 Sep 2026. Details can change; the linked page is the authoritative source.

Pipeline & Regulatory Record

What public registers list for Regeneron Pharmaceuticals: clinical trials it sponsors, FDA device clearances, Irish licences, recent approvals and supply shortages. Rebuilt daily, last on 6 Oct 2026.

104Trials as lead sponsor
68Recruiting now
6With a site in Ireland
0FDA device clearances

Clinical trials 104 in our ClinicalTrials.gov registers · 17 in the EU register

StudyPhaseStatus
A Trial to See if the Combination of Fianlimab With Cemiplimab Works Better Than Pembrolizumab for Preventing or Delaying Melanoma From Coming Back After it Has Been Removed With Surgery
NCT05608291 · site in Ireland · Melanoma
Phase 3Active, closed
Clinical Study of Fianlimab in Combination With Cemiplimab Versus Pembrolizumab in Adolescent and Adult Patients With Previously Untreated Unresectable Locally Advanced or Metastatic Melanoma
NCT05352672 · site in Ireland · Melanoma
Phase 3Active, closed
Study of Adjuvant Cemiplimab Versus Placebo After Surgery and Radiation Therapy in Patients With High Risk Cutaneous Squamous Cell Carcinoma
NCT03969004 · site in Ireland · Cutaneous Squamous Cell Carcinoma
Phase 3Active, closed
A Study to Learn About the Long-Term Health of Adult Participants From a Previous Study of a New Melanoma Treatment
NCT06848088 · site in Ireland · Melanoma
Phase 2By invitation
A Proof-of-Concept Study to Learn Whether Linvoseltamab Can Eliminate Abnormal Plasma Cells That May Lead to Multiple Myeloma in Adult Patients With High-Risk Monoclonal Gammopathy of Undetermined Significance or Non-High-Risk Smoldering Multiple Myeloma
NCT06140524 · site in Ireland · Monoclonal Gammopathy of Undetermined Significance (MGUS), Smoldering Multiple Myeloma (SMM)
Phase 2Recruiting
A Study to Compare How Well Odronextamab Combined With Chemotherapy Works and How Safe it is Against Rituximab Combined With Chemotherapy, in Adult Patients With Previously Untreated Diffuse Large B-cell Lymphoma
NCT06091865 · site in Ireland · Diffuse Large B-cell Lymphoma (DLBCL)
Phase 3Recruiting
Study of Olatorepatide in Adult Participants Living With Overweight or Obesity in the US
NCT07431086 · Overweight or Obesity
Phase 2Active, closed
A U.S. Registry of Eosinophilic Esophagitis Pediatric, Adolescent and Adult Patients Treated With DUPIXENT® As Standard of Care
NCT06693531 · Eosinophilic Esophagitis (EoE)
ObservationalActive, closed
A Study of Cemiplimab Plus Chemotherapy Versus Cemiplimab Plus Chemotherapy Plus Other Cancer Treatments for Adult Patients With Operable Non-Small Cell Lung Cancer (NSCLC)
NCT06465329 · Non-Small Cell Lung Cancer
Phase 2Active, closed
A Study to Test the Safety, Tolerability, and Efficacy of an Antibody, REGN7999, Injected Under the Skin for the Treatment of Iron Overload in Adult Participants With Non-Transfusion Dependent β-thalassemia, Using MRI Scans to Measure Iron Levels in the Body
NCT06421636 · Non-Transfusion Dependent Beta-Thalassemia (NTDT)
Phase 2Active, closed

Showing 10 of 104, trials with Irish sites first. The full lists are on the sponsor pages below.

All trials by sponsor name 1 registry name

Drugs in these trials 64 compounds

EU trials register (CTIS) 17 authorised or ongoing

NICE technology appraisals 16 of its medicines · 16 current

Appraisals of medicines sold under a brand this company holds in EMA or FDA records, from our NICE appraisals register. NICE decisions apply to the NHS in England. © NICE 2026 technology appraisal guidance. Available from www.nice.org.uk/guidance. All rights reserved. Subject to Notice of rights. NICE guidance is prepared for the National Health Service in England. All NICE guidance is subject to regular review and may be updated or withdrawn. NICE accepts no responsibility for the use of its content in this product/publication.

Group (Regeneron Pharmaceuticals): founded 1988, headquarters Eastview, website regeneron.com. Wikidata Q7308054 · Wikipedia. From Wikidata (CC0), matched by the group's SEC filer number.

How this is matched: register records are linked to this page by the organisation name they carry, here Regeneron Pharmaceuticals; Regeneron Pharmaceuticals Inc.; Regeneron Ireland U.C.; Regeneron Ireland Designated Activity Company; REGENERON PHARMACEUTICALS; Regeneron Ireland Designated Activity Company (DAC). Spot a wrong match? Tell us.

Financials & Irish Entities

From the annual reports Regeneron Pharmaceuticals, Inc. files with the US Securities and Exchange Commission (10-K, US GAAP), in USD as reported. Latest financial year: to Dec 2025.

$14.3bnRevenue
$5.9bnR&D expense
40.8%R&D as % of revenue
$4.5bnNet income (31.4% margin)
Revenue and R&D expense, USD bn$0.0bn$5.0bn$10bn$15bn$20bnDec 2021Dec 2022Dec 2023Dec 2024Dec 2025Dec 2021: $16bn (Revenue)Dec 2022: $12bn (Revenue)Dec 2023: $13bn (Revenue)Dec 2024: $14bn (Revenue)Dec 2025: $14bn (Revenue)RevenueDec 2021: $2.9bn (R&D expense)Dec 2022: $3.6bn (R&D expense)Dec 2023: $4.4bn (R&D expense)Dec 2024: $5.1bn (R&D expense)Dec 2025: $5.9bn (R&D expense)R&D expense
RevenueR&D expense
Year toRevenueR&DR&D %Net incomeFiling
Dec 2025$14.34bn$5.85bn40.8%$4.50bn10-K 2026
Dec 2024$14.20bn$5.13bn36.1%$4.41bn10-K 2026
Dec 2023$13.12bn$4.44bn33.8%$3.95bn10-K 2026
Dec 2022$12.17bn$3.59bn29.5%$4.34bn10-K 2025
Dec 2021$16.07bn$2.86bn17.8%$8.08bn10-K 2024

Each year is taken from the most recent annual report that includes it, so earlier years reflect any later restatement. Source: SEC EDGAR (XBRL financial data). Compare companies on the pharma company financials register.

Companies registered in Ireland 1 active in the CRO register

CompanyCRO no.RegisteredLast accounts
Regeneron Ireland Designated Activity Company
DAC - Designated Activity Company (limited by shares) · LEI 635400NABUOXXFAMHX81
5195502012Dec 2024

From the Companies Registration Office (CRO Open Data, CC BY 4.0). A company is listed when GLEIF's legal entity register links it to Regeneron Pharmaceuticals, Inc. as its ultimate parent, or when we checked its name and registered address by hand. Branches of foreign companies appear as "External company". Spot a missing or wrong entry? Tell us.

In the News

No coverage yet — our newsroom tracks Regeneron Pharmaceuticals continuously.

Research Publications

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FDA Recalls (US)

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