RESTON, Va., March 26, 2018 /PRNewswire/ -- comScore, Inc. (OTC: SCOR) announced today that Susan J. Riley, Chair of the Board of comScore, has decided to step down from the Board, effective immediately. The Board expects to appoint a Chair and, if needed, a lead independent director, concurrent with the conclusion of its search for its new CEO. Ms. Riley will serve as a consultant to the Company through the end of 2018.