On April 23, 2018, Mr. Stephen Kraus, a member of the Board of Directors of Allena Pharmaceuticals, Inc. since September 2011, informed the Board that he will not stand for reelection at the Company’s 2018 Annual Meeting of Stockholders, scheduled to be held on June 8, 2018. Accordingly, Mr. Kraus’ service as a member of the Board will cease following the Annual Meeting. On April 25, 2018, the Board nominated Andrew A.F. Hack for election to the Board, as a member of Class I of the Board, at the Annual Meeting.