 NEW YORK, May 21, 2021 PRNewswire -- Juan Monteverde , founder and managing partner at Monteverde Associates PC, a national securities firm rated Top 50 in the 2018-2020 ISS Securities Class Action Services Report and headquartered at the Empire State Building in New York City, is investigating Core-Mark Holding Company, Inc. CORE or the Company CORE relating to its proposed acquisition by Performance Food Group Co. Under the terms of the agreement, CORE shareholders will receive 23.875 in cash and 0.44 shares of PFG per share they own. The investigation focuses on whether Core-Mark Holding Company, Inc. and its Board of Directors violated securities laws andor breached their fiduciary duties to the Company by 1 failing to conduct a fair process, and 2 whether the transaction is properly valued. 