On February 26, 2019, Irving R. Gerstein, chairman of the board of directors of Atlantic Power Corporation notified the company of his decision to retire from service as chairman of the board and as a member of the board following the company’s 2019 annual meeting of shareholders, which is presently anticipated to be held on June 19, 2019. Consequently, Mr. Gerstein will not stand for re-election to the board at the annual meeting. Mr. Gerstein’s decision to resign was not due to any disagreement with the company on any matter relating to the operations, policies or practices of the company. At a regularly scheduled board meeting on February 26, 2019, the board determined that following his retirement, Mr. Gerstein will be succeeded as chairman by Kevin T. Howell, pending Mr. Howell’s re-election to the board at the annual meeting.