On February 18, 2021, the Board of Directors of Plug Power Inc. appointed Kimberly A. Harriman as a director and as a member of the Audit Committee of the Board, effective immediately. Ms. Harriman has been designated as a Class III director to serve until the company's 2023 Annual Meeting of Stockholders or until her successor has been duly elected and qualified, or until her earlier death, removal or resignation. The Board has determined that Ms. Harriman is an independent director as defined in the NASDAQ Stock Market listing standards and applicable Securities and Exchange Commission rules and regulations. Ms. Harriman is the Vice President, State Government Relations and Public Affairs, of Avangrid Inc., an NYSE-listed energy provider operating in 24 states. Prior to joining Avangrid, from 2016 to December 2020, Ms. Harriman served as Senior Vice President, Public and Regulatory Affairs, for New York Power Authority, the largest public utility in the United States.