SOUTH SAN FRANCISCO, Calif., May 14, 2018 (GLOBE NEWSWIRE) — Core-Mark Holding Company, Inc. (Nasdaq:CORE), one of the largest marketers of fresh and broad-line supply solutions to the convenience retail industry in North America, announced today that it will webcast its presentation from the 2018 BMO Farm to Market Conference on Wednesday May 16, 2018 beginning at 11:30 a.m. Eastern.  The original presentation time slot of 9:30 a.m. was changed by BMO to accommodate conflicting schedules.