Drugs / Fianlimab
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Fianlimab

also known as R3767 · REGN3767

Monoclonal antibody targets LAG3 via inhibition

Developed for
melanoma · non-small cell lung carcinoma · cancer · clear cell renal carcinoma · colorectal cancer · fallopian tube cancer · head and neck squamous cell carcinoma · hepatocellular carcinoma
+19 more · ovarian cancer · primary peritoneal carcinoma · colon carcinoma · cutaneous melanoma · endometrial cancer · head and neck cancer · infiltrating bladder urothelial carcinoma · malignant pleural mesothelioma · pediatric high-grade glioma · plasma cell myeloma · posterior fossa group A ependymoma · prostate cancer · renal cell carcinoma · skin basal cell carcinoma · skin squamous cell carcinoma · squamous cell carcinoma · urothelial carcinoma · breast cancer · nasopharyngeal carcinoma
Investigated by
Regeneron Pharmaceuticals · Memorial Sloan Kettering Cancer Center · Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins · University of Chicago · Brian Rini · Bristol-Myers Squibb
+22 more · Columbia University · French Cooperative Thoracic Intergroup · Henry Ford Health System · John Strickler, M.D. · M.D. Anderson Cancer Center · MFAR · Mayo Clinic · Montefiore Medical Center · NYU Langone Health · National Cancer Institute (NCI) · Pierre Fabre Laboratories · QuantumLeap Healthcare Collaborative · Spanish Melanoma Group · Thomas Jefferson University · UC Cancer Consortium · United States Department of Defense · University of California, Irvine · University of Michigan · University of Oklahoma · University of Wisconsin, Madison · Vanderbilt-Ingram Cancer Center · Virginia Commonwealth University

Trials 37 · a red edge is where a trial was stopped

PhaseRegistry idDatesIndicationSponsorStatusOutcome
Phase 14 trials
Phase 1 NCT07365839 Jul 2026 → Feb 2035 expected hepatocellular carcinoma Virginia Commonwealth University Not yet recruiting No outcome recorded
Phase 1 NCT05137054 Aug 2022 → Mar 2028 expected plasma cell myeloma Regeneron Pharmaceuticals Recruiting No outcome recorded
Phase 1 NCT03233139 Jun 2017 → Sep 2027 expected cancer Regeneron Pharmaceuticals Active not recruiting No outcome recorded
Phase 1 NCT03005782 Nov 2016 → Apr 2024 cancer Regeneron Pharmaceuticals Completed No outcome recorded
Phase 1/23 trials
Phase 1/2 NCT07567469 Aug 2026 → Aug 2032 expected pediatric high-grade glioma, posterior fossa group A ependymoma Regeneron Pharmaceuticals Not yet recruiting No outcome recorded
Phase 1/2 NCT04989946 Dec 2021 → Dec 2026 expected prostate cancer University of Wisconsin, Madison Active not recruiting No outcome recorded
Phase 1/2 NCT04590326 Dec 2020 → Mar 2027 expected endometrial cancer, fallopian tube cancer, ovarian cancer, primary peritoneal carcinoma Regeneron Pharmaceuticals Recruiting No outcome recorded
Phase 225 trials
Phase 2 NCT07346196 Feb 2027 → Aug 2031 expected squamous cell carcinoma University of Chicago Not yet recruiting No outcome recorded
Phase 2 NCT07511036 Sep 2026 → May 2028 expected melanoma M.D. Anderson Cancer Center Not yet recruiting No outcome recorded
Phase 2 NCT07224022 Jul 2026 → Aug 2028 expected colon carcinoma John Strickler, M.D. Not yet recruiting No outcome recorded
Phase 2 NCT07527325 Jul 2026 → Feb 2029 expected cutaneous melanoma University of California, Irvine Not yet recruiting No outcome recorded
Phase 2 NCT07281768 Jul 2026 → Jul 2030 expected colorectal cancer Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins Recruiting No outcome recorded
Phase 2 NCT07414992 Jul 2026 → Mar 2028 expected urothelial carcinoma Memorial Sloan Kettering Cancer Center Not yet recruiting No outcome recorded
Phase 2 NCT07179315 Jun 2026 → Nov 2029 expected head and neck cancer University of Chicago Recruiting No outcome recorded
Phase 2 NCT07188896 Apr 2026 → Nov 2029 expected clear cell renal carcinoma Brian Rini Recruiting No outcome recorded
Phase 2 NCT06769698 Apr 2026 → Jun 2028 expected head and neck squamous cell carcinoma Regeneron Pharmaceuticals Recruiting No outcome recorded
Phase 2 NCT07234058 Feb 2026 → May 2028 expected malignant pleural mesothelioma French Cooperative Thoracic Intergroup Not yet recruiting No outcome recorded
Phase 2/32 trials
Phase 2/3 NCT05800015 Aug 2023 → Jan 2030 expected non-small cell lung carcinoma Regeneron Pharmaceuticals Active not recruiting No outcome recorded
Phase 2/3 NCT05785767 Jun 2023 → Sep 2027 expected non-small cell lung carcinoma Regeneron Pharmaceuticals Active not recruiting No outcome recorded
Phase 33 trials
Phase 3 NCT06246916 Sep 2024 → Mar 2027 expected melanoma Regeneron Pharmaceuticals Recruiting No outcome recorded
Phase 3 NCT05608291 Jan 2023 → Jul 2026 overdue melanoma Regeneron Pharmaceuticals Active not recruiting No outcome recorded
Phase 3 NCT05352672 Jul 2022 → Mar 2026 overdue melanoma Regeneron Pharmaceuticals Active not recruiting No outcome recorded
Also used as a comparator or background therapy in 3 trials
PhaseRegistry idDatesIndicationSponsorStatusOutcome
Phase 11 trial
Phase 1 NCT07650266 Comparator Jul 2026 → Jul 2030 expected nasopharyngeal carcinoma Memorial Sloan Kettering Cancer Center Not yet recruiting No outcome recorded
Phase 22 trials
Phase 2 NCT07058012 Comparator Apr 2026 → Apr 2029 expected colorectal cancer NSABP Foundation Inc Recruiting No outcome recorded
Phase 2 NCT06848088 Background Apr 2025 → Oct 2029 expected melanoma Regeneron Pharmaceuticals Enrolling by invitation No outcome recorded

Press releases naming this drug 5 releases

DateIssuerRelease
2026-05-15 Regeneron Pharmaceuticals Regeneron Provides Update on Phase 3 Trial of Fianlimab (LAG-3 Inhibitor) Combination in First-Line Unresectable or Metastatic Melanoma regeneron.com
2023-05-25 Regeneron Pharmaceuticals Fianlimab (LAG-3 inhibitor) Combined with Libtayo® (cemiplimab) Shows Clinically Meaningful and Durable Tumor Responses Across Key Advanced Melanoma Patient Populations regeneron.com
2022-12-01 Regeneron Pharmaceuticals Regeneron ESMO IO Presentations Highlight Potential of Fianlimab and Libtayo® (cemiplimab) in Multiple Solid Tumor Types regeneron.com
2022-09-12 Regeneron Pharmaceuticals Fianlimab (LAG-3 Inhibitor) Combined with Libtayo® (cemiplimab) Demonstrates Greater than 60% Response Rates in Two Independent Cohorts of Patients with Advanced Melanoma Naïve to PD-1 or PD-L1 Inhibitors regeneron.com
2022-09-04 Regeneron Pharmaceuticals ESMO Presentations of Libtayo® (cemiplimab), Fianlimab and Novel Bispecific Antibodies Showcase Expanding Potential of Regeneron's Oncology Pipeline in Multiple Cancers regeneron.com

Evidence & citations 7 cited values

Every value below carries the sentence it was read from. 40 sources stand behind the page.

FieldValueCited text
Known as Fianlimab “This study is researching an experimental drug called fianlimab (also known as REGN3767), combined with another medication called cemiplimab (also known as REGN2810), called...” NCT06246916
37

Fianlimab (REGN3767) administered intravenously in combination with Cemiplimab.” NCT05929664

“Cemiplimab 350mg + Fianlimab 1600mg intravenously” NCT07058012

NCT07234058

NCT07650266

NCT07414992

NCT06887088

NCT06769698

NCT07179315

NCT06571708

NCT06205836

NCT06787612

NCT07511036

NCT03916627

NCT07224022

NCT06161441

NCT05137054

NCT06918132

NCT05608291

NCT07365839

NCT07346196

NCT06848088

NCT05785767

NCT06594991

NCT06384820

NCT07188896

NCT03233139

NCT05352672

NCT07223541

NCT07281768

NCT07527325

NCT06190951

NCT05800015

NCT04590326

NCT06699602

NCT07567469

NCT04989946

NCT06865339

Known as R3767 “This study is researching an experimental drug called REGN3767, also known as fianlimab (R3767), when combined with another medication called REGN2810, also known as cemiplimab” NCT05352672
2

“This study is researching an experimental drug called REGN3767, also known as fianlimab (R3767), when combined with another medication called cemiplimab” NCT05608291

“This study is researching an experimental drug called REGN3767, also known as fianlimab (R3767)” NCT06190951

Known as REGN3767 “combined with both cemiplimab and fianlimab (also known as REGN3767)” NCT04590326
2

NCT03005782

NCT01042379

Action Inhibit “Fianlimab is a drug that blocks the action of a protein called lymphocyte activation gene (LAG)-33 (LAG-3)” NCT03916627
Modality Monoclonal antibody “Cemiplimab (also known as REGN2810) and fianlimab (also known as REGN3767) are both a type of drug called a monoclonal antibody.” NCT03916627
Route Intravenous “REGN 3767: 1600 mg q3W X 12 weeks IV” NCT01042379
Target LAG3 “Fianlimab is a human IgG4 antibody to lymphocyte activation gene-3 (LAG-3)” NCT04989946