OUR PURPOSE PIONEERING SCIENCE ENVIRONMENT COMMUNITY REPORTING 72 BIOGEN 2021 YEAR IN REVIEW PATIENTS OUR PEOPLE Promoting diversity, equity and inclusion As a company that pioneers science for the betterment of humanity, Biogen believes that any form of prejudice, racism or intolerance is unacceptable and has no place at our company. To advance our mission, we seek to engage the world’s brightest minds, and have long prioritized diversity, equity and inclusion (DE&I) not only as a moral imperative, but as a competitive strength. In 2020, after the murder of George Floyd, it became clear that we needed to do more to promote our values both within our company and globally. We held dozens of listening sessions across all levels of the organization, engaged with outside experts and consulted community organizations. What we heard helped shape our enhanced four-part DE&I strategy. Our Board of Directors In accordance with our Corporate Governance Principles, we endeavor to have a Board of Directors that collectively represents diversity of thought and experience at strategic and policy-making levels. Our Corporate Governance Committee considers the diversity of skills and experiences that a potential nominee possesses and the extent to which such diversity would enhance the perspective, background, knowledge and experience of our Board of Directors as a whole. Personal diversity, including gender, national origin, and ethnic and racial diversity, is considered an asset to and by our Board of Directors. Employee engagement remains a critical component of the implementation and execution of our DE&I strategy. We rely on a cross- functional governing body of employees known as the Diversity, Equity and Inclusion Strategic Council (DEISC), which serves as the voice of employees and helps inform the organization’s DE&I strategic focus. In 2021, most of our employees interacted with DE&I initiatives, including more than 60 internal DE&I events. These events included the #IWillAccelerate webinar series, which had 150 global participants per session and focused on career advancement strategies and topics such as “Playing to Your Strengths” and “Overcoming Imposter Syndrome.” DE&I STRATEGY #1 Build company-wide awareness, capability and urgency to foster and sustain a diverse and inclusive environment GOALS 95% of People Managers trained on inclusive recruiting, hiring, promotion and retention 60% of all employees participate in DE&I training PROGRESS 89.9% trained by December 2021 70% of employees interacted with DE&I workshops and training modules. We supplemented learning sessions with 11 debrief sessions for training attendees, with 2,600 e-learning participants and 485 follow-up session participants. Three allyship training sessions were held for leadership teams and HR business partners. Þ READ MORE ABOUT OUR DE&I STRATEGY