Catalyst Calendar

Biogen’s Litifilimab Demonstrates Rapid and Durable Efficacy in New 52-Week Phase 2 Data from Ongoing Phase 2/3 AMETHYST Study, Reinforcing Its Potential as a First-in-Class Therapy for Cutaneous Lupus Erythematosus

Continued improvement: An increased response was seen in participants on litifilimab from week 24 through week 52, with more individuals achieving clear or almost clear skin (27.2%; CLA IGA 0-1) and improvements in disease activity (28.8%; CLASI-70) than at week 24 (19.0% and 21.7%, respectively)

Phase 3 Pediatric EMPAVELI Data Published in Clinical Journal of the American Society of Nephrology Show Reduction in Proteinuria and Stabilized Kidney Function in Adolescents with C3G or Primary IC-MPGN

EMPAVELI-treated adolescents achieved a 75% relative reduction in proteinuria within 6 months versus placebo EMPAVELI is the only approved treatment for adolescents with C3G and primary IC-MPGN, based on VALIANT study Publication follows a recent FDA label update to expand EMPAVELI’s indication to

Biogen to Report Third Quarter 2026 Financial Results October 28, 2026

Cambridge, Mass.— Biogen Inc. (Nasdaq: BIIB) today announced it will report third quarter 2026 financial results Wednesday, October 28, 2026, before the financial markets open. Following the release of the financials, the Company will host a live webcast with Biogen management at 8:30 a.m. ET.

LEQEMBI® Pen (Subcutaneous Formulation of LEQEMBI®) Approved in Japan for the Treatment of Early Alzheimer’s Disease

The First and Only Anti-Amyloid Treatment in Japan that Enable At-Home Administration for Alzheimer's Disease, a Progressive Disease TOKYO and CAMBRIDGE, Mass., Sept. 16, 2026 (GLOBE NEWSWIRE) -- Eisai Co., Ltd. and Biogen Inc. (Nasdaq: BIIB), announced today that “LEQEMBI ® Pen”, the subcutaneous

Stoke Therapeutics and Biogen Present Long-Term Clinical Data that Support the Disease-Modifying Potential of Zorevunersen, an Investigational Medicine for the Treatment of Dravet Syndrome, at the 16th European Epilepsy Congress (EEC)

–4-year data from the Phase 1/2a open-label extension (OLE) studies showed substantial and durable reductions in seizures and continuing improvements in cognition and behavior in patients treated with zorevunersen on top of standard of care anti-seizure medicines – – New data showed substantial

LEQEMBI® (lecanemab) Subcutaneous Formulation as an Initiation Treatment for Early Alzheimer’s Disease Approved in China

The First and Only Anti-Amyloid Therapy in China that Enables At-Home Administration for Alzheimer’s Disease, a Progressive Neurodegenerative Disease TOKYO and CAMBRIDGE, Mass., Sept. 03, 2026 (GLOBE NEWSWIRE) -- Eisai Co., Ltd. and Biogen Inc. (Nasdaq: BIIB) announced today that the National

Stoke Therapeutics and Biogen Announce Presentations of Clinical Data from Studies of Zorevunersen, an Investigational Medicine for the Treatment of Dravet Syndrome, at the 16th European Epilepsy Congress (EEC)

–4-year data from the Phase 1/2a open-label extension (OLE) studies support the potential disease-modifying effects of zorevunersen– – Improvements in cognition and behavior sustained through 4 years, in addition to durable seizure reductions and a generally well-tolerated safety profile – –New

Canada’s Drug Agency Issues Final Positive Recommendation Supporting Public Reimbursement of LEQEMBI® (lecanemab) for Early Alzheimer’s Disease

An Important Step Forward for Access to LEQEMBI® for Eligible Patients in Canada TOKYO and CAMBRIDGE, Mass., Aug. 31, 2026 (GLOBE NEWSWIRE) -- Eisai Co., Ltd. and Biogen Inc. (Nasdaq: BIIB), announced today that Canada’s Drug Agency (CDA-AMC) has issued a final recommendation supporting public

Biogen to Participate in the Wells Fargo 21st Annual Healthcare Conference

Cambridge, MA, - - Biogen Inc. (Nasdaq: BIIB) announced today that Robin Kramer, Chief Financial Officer, and Adam Keeney, Head of Corporate Development, will participate in a fireside chat during the Wells Fargo 21st Annual Healthcare Conference. The webcast will be live on Wednesday, Sept 9,

LEQEMBI IQLIK® (lecanemab-irmb) Autoinjector for Initiation of Therapy Now Available in the U.S. for Early Alzheimer’s Disease

LEQEMBI IQLIK is the first-of-its-kind anti-amyloid treatment worldwide offering at-home dosing for initiation and maintenance (approved in the U.S.) TOKYO and CAMBRIDGE, Mass., Aug. 24, 2026 (GLOBE NEWSWIRE) -- Eisai Co., Ltd. and Biogen Inc. (Nasdaq: BIIB), announced today that once weekly

Biogen Completes Acquisition of RayThera Inc.

Lead program now in Phase 1 development CAMBRIDGE, Mass., Aug. 06, 2026 (GLOBE NEWSWIRE) -- Biogen Inc. (Nasdaq: BIIB) today announced the completion of the acquisition of RayThera Inc., a privately held biotechnology company focused on discovering and developing small-molecule therapies in

Biogen Reports Second Quarter 2026 Results

Biogen Appoints Michael J. Parini as Chief Legal Officer

CAMBRIDGE, Mass., July 15, 2026 (GLOBE NEWSWIRE) -- Biogen Inc. (Nasdaq: BIIB) today announced the appointment of Michael J. Parini as Chief Legal Officer, effective August 3, 2026. Parini will serve as a member of Biogen's Executive Committee and report to Christopher A.

LEQEMBI® Real-World LEADER Study Presented at AAIC® 2026 Finds Over 75% of Early Alzheimer’s Patients Enrolled in the Study Remained Stable and Nearly 7% Improved Over an Average of 17 Months of Treatment

Real-World Findings Support Long-Term Benefits of Continuous Treatment with LEQEMBI and Provide Important Insights into Treatment Experience Outside of a Clinical Trial Setting TOKYO and CAMBRIDGE, Mass., July 14, 2026 (GLOBE NEWSWIRE) -- Eisai Co., Ltd. and Biogen Inc.

Biogen Presents Phase 2 CELIA Data at AAIC Demonstrating Meaningful Clinical Outcomes and Robust Tau Reduction with Diranersen in Early Alzheimer’s Disease

Clinical outcomes: Diranersen demonstrated efficacy across all studied doses at 18 months, with consistent results across multiple prespecified clinical endpoints; the 60 mg dose showed the strongest response with slowing of clinical decline on the cognitive endpoints—42% on ADAS-Cog13 and 50% on

FDA Approves LEQEMBI IQLIK® (lecanemab-irmb) Subcutaneous Injection as an Initiation Dose for Early Alzheimer’s Disease

LEQEMBI IQLIK is a first-of-its-kind anti-amyloid treatment worldwide, offering at-home dosing for initiation and maintenance (approved in the U.S.) U.S. launch of LEQEMBI IQLIK as an initiation dose planned for late August 2026 TOKYO and CAMBRIDGE, Mass., July 13, 2026 (GLOBE NEWSWIRE) -- Eisai