Yvonne Greenstreet

Dr. Yvone Greenstreet transitioned from President and COO to CEO in December 2021. Yvonne joined Alnylam in 2016 as Chief Operating Officer and was promoted to President and COO in 2020. Yvonne has more than 25 years of experience in the Biopharmaceutical industry, driving strategy and innovation, bringing transformative medicines to patients, and building successful businesses in the US, Europe and globally.

Between 2011 and 2013, Yvonne was Senior Vice President and Head of Medicines Development at Pfizer. Prior to Pfizer, she was at GlaxoSmithKline plc for 18 years, where she was Senior Vice President and Chief of Strategy for Research and Development. Yvonne had previously been in various positions of increasing responsibility at GSK, including Senior Vice President for Medicines Development and Chief Medical Officer for Europe.

Yvonne trained as a physician and earned her medical degree (MBChB) from the University of Leeds in the UK. She also holds an MBA from INSEAD Business school in France. Dr. Greenstreet serves on the board of directors of Pacira Pharmaceuticals, argenyx and American Funds. Additionally, she is in the Scientific Advisory Committee of the Bill and Melinda Gates Foundation and is a member of the Discovery Council of Harvard Medical School.