On January 1, 2020, the Board of Directors of AmerisourceBergen Corporation elected Dennis M. Nally, to serve on the Board, effective immediately. Mr. Nally is the former Chairman of PricewaterhouseCoopers (PwC), having served two terms in that role until his retirement from PwC in 2016. During his 42-year career with PwC, Mr. Nally served in a number of senior management and executive positions, including Chairman from 2009 to 2016, and Senior Partner and Chairman, United States, from 2002 to 2009. The Board determined that Mr. Nally is an independent director under the standards established by the New York Stock Exchange and the Board. Upon Mr. Nally's election, the Board increased from nine to ten members in accordance with the Company's Bylaws.