OUR PURPOSE PIONEERING SCIENCE PATIENTS OUR PEOPLE ENVIRONMENT COMMUNITY REPORTING 4 BIOGEN 2021 YEAR IN REVIEW $230 MILLION spent with diverse suppliers 14,493 Biogen employee volunteer hours, tripling 2020’s engagement 100% renewable electricity commitment since 2014 14.7% employee participation in Healthy Climate, Healthy Lives™ 18% of Biogen’s top 80% of suppliers, by spend, have set or pledged to set SBTi-approved targets 1 47.6% women globally and 26% racial and ethnic minorities (U.S.) in director-level roles and above > 2 MILLION patients treated 1996 – 2021 $80 MILLION in grants, sponsorships and in-kind contributions from Biogen and the Biogen Foundation At Biogen, our purpose is clear: to serve humanity through science. 40 countries served by our Expanded Access Programs 61,295 students in 19 countries engaged in Biogen’s Community Lab since 2002 5 -YEAR anniversary of SPINRAZA®, with more than 11,000 people treated 26% of Biogen’s top 50% of suppliers, by spend, have committed to 100% RE by 2040 100% of studies 2 initiated included a plan to recruit underrepresented patients ~30 clinical programs across a broad set of disease areas 2021 HIGHLIGHTS 1. Biogen previously disclosed data for our top 30 suppliers, by spend, using the supplier’s definition of a science-based target. The updated metric reflects an analysis of Biogen’s top 200 suppliers, by spend, against public lists of companies engaged with the Science Based Targets initiative. 2. U.S. clinical trials in Phases 1–4 led by Biogen’s Global Clinical Operations. Landon, who has spinal muscular atrophy (SMA), with his mother.