OUR PURPOSE PIONEERING SCIENCE COMMUNITY REPORTING 85 ADVANCING HEALTHY CLIMATE, HEALTHY LIVES™ BIOGEN 2021 YEAR IN REVIEW PATIENTS OUR PEOPLE ENVIRONMENT Program Element Focus 2040 Goal Interim Target Progress Highlights ENGAGING EMPLOYEES INNOVATION AND ACCELERATED ACTION Assist employees to go fossil fuel free in their homes • Offer an employee benefit that covers the cost differential for 100% Renewable Energy at Home. • 991 employees enrolled as of Dec. 31, 2021. • Inspired 180 employee idea submissions to Biogen’s inaugural Innovation Challenge on climate, health and equity. • Fossil Fuel Free employee incentive program • Launched new program to offset the costs of switching to electric appliances and other goods, with 839 employees having participated as of Dec. 31, 2021. Engage employees at work • Create a climate-related Employee Resource Network. • Launched ourIMPACT in 2020, with 1,069 employees having participated as of Dec. 31, 2021. Enable employees to invest in ESG options in eligible retirement plans • Consider relevant and appropriate investment options. • Engaged with Biogen financial advisors to evaluate ESG-focused companies and funds and other investment options with an eye toward enhancing long-term risk-adjusted returns. NET ZERO SUPPLY CHAIN ENGAGING SUPPLIERS Reduce scope 3 emissions 90% by 2045 from a 2019 base year • 80% of suppliers by spend to set science-based targets on climate by 2025. • 18% of Biogen’s top 80% of suppliers, by spend, have set or pledged to set SBTi-approved targets. 90% of suppliers by spend to use 100% renewable electricity • 50% of suppliers by spend to use 100% renewable electricity by 2030. • 26% of Biogen’s top 50% of suppliers, by spend, have committed to 100% RE by 2040. Program progress Collaborating with global leaders Driving impact at scale requires collaborative, cross-sector efforts. Biogen is working with global leaders to drive innovation, mitigate environmental and health impacts, and influence policy. Advancing the science on climate, health and equity As a science-based company, Biogen is committed to the Healthy Climate, Healthy Lives™ initiative, which includes a number of efforts to advance the science on climate, health and equity. Scientific Advisory Council Biogen is convening a new Healthy Climate, Healthy Lives™ Scientific Advisory Council composed of seven recognized experts in issues surrounding climate, health and equity. Representing four continents, the members bring expertise ranging from neurology and epidemiology to atmospheric science and physiology. Biogen looks forward to learning from and collaborating with this collective as we work to advance science, with an initial emphasis on the impacts of climate on brain health.