Article contentShares of Constellation Software Inc. (TSX: CSU) dropped more than five per cent after the company announced on Sept. 25 that founder and chief executive Mark Leonard resigned from his position for health reasons after 30 years on the job. After an Oct. 1 conference call with new president and chief executive Mark Miller to discuss the leadership transition, BMO Capital Markets analyst Thanos Moschopoulos said in a note that while Leonard is “irreplaceable,” the selloff was “overdone” and tha ...