OUR PURPOSE PIONEERING SCIENCE ENVIRONMENT COMMUNITY REPORTING 71 ENABLING EMPLOYEES TO THRIVE BIOGEN 2021 YEAR IN REVIEW PATIENTS OUR PEOPLE To continuously improve on EHS, our cross-functional teams evaluated 400 work tasks across Pharmaceutical Operations & Technology and Research & Development, and identified 57 critical tasks that could expose employees to serious injury or fatality (SIF) if controls are absent or not used. To reduce the risks associated with these essential activities, we pinpointed 92 action items and by end of 2021, we had completed 82 of them. Workplace Health and Safety efforts are guided by our EHS Policy , which calls on all of us at Biogen to maintain a healthful and safe work environment and to minimize the impact of our operations on the environment. Celebrating health and safety Our annual EHS Awards recognize exemplary employee efforts in four areas: Be Safe, Be Well, Be Sustainable and Be Resilient. In 2021, we received more than 100 nominations, with four projects and 20 employees recognized with a Global EHS award. One of the winning projects focused on My Green Lab Certification, engaging more than 150 employees in a pilot to determine if the certification program could successfully guide laboratory employees to implement best practices to reduce waste and the use of energy and water. Þ READ MORE IN THE ENVIRONMENT SECTION OF THIS REPORT SPOTLIGHT EHS Award winner Camir Ayuso sets a leading Hu example A champion of Human Performance (Hu), Camir Ayuso (pictured) led an initiative to reinvigorate Hu practices and tools with manufacturing staff at our North Carolina site. She created a detailed project plan that included a weekly newsletter, an award drawing to encourage open reporting, post-job reviews and more. To enhance employee education on critical topics, Ayuso developed content for interactive “Hu Hours,” when staff could learn how to submit an open report or how to perform a pre-job brief. Her efforts made a significant impact on the level of Hu maturity on site, increasing our capacity to be proactive and recover from challenges. The EHS Awards also recognized a leadership-focused initiative launched at Biogen’s RTP site to raise awareness and understanding of a psychologically safe culture – one where employees feel welcome to share ideas, questions and concerns. Throughout 2021, multiple interactive sessions were held with all leadership teams to discuss how aspects of psychological safety can impact direct reports and others and promote an environment where taking interpersonal risks within a team is supported.

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