Biogen : Announces Webcast of Annual Meeting of Stockholders

May 28, 2026

Cambridge, Mass. - Biogen Inc. (Nasdaq: BIIB) announced today that the webcast of the Company's 2026 Annual Meeting of Stockholders will be held on Tuesday, June 9, 2026, at 9:00 a.m. Eastern Time. A live audio webcast of the meeting will be available on the Investor Relations section of the Company's corporate website at www.biogen.com/investors or, for stockholders of record, directly via www.virtualshareholdermeeting.com/BIIB2026. An archived version of the webcast will be available for at least 90 days following the presentation. Please allow at least 10 minutes prior to the event to visit the site and test your browser's compatibility to listen to the webcast.

Founded in 1978, Biogen is a leading biotechnology company that pioneers innovative science to deliver new medicines to transform patient's lives and to create value for shareholders and our communities. We apply deep understanding of human biology and leverage different modalities to advance first-in-class treatments or therapies that deliver superior outcomes. Our approach is to take bold risks, balanced with return on investment to deliver long-term growth.

We routinely post information that may be important to investors on our website at www.biogen.com. Follow us on social media - Facebook, LinkedIn, X, YouTube.

Contact: Karen Jewell

Investor Relations Biogen 781.464.2442