Eminence Capital Sends Letter to GPK Board of Directors Seeking Immediate Reinstatement of Mike Doss as CEO

Views Board's Decision to Replace Doss as Misguided, Ill-timed, and Done Without Proper Diligence Believes that Chairman Phil Martens Wields Outsized Influence over GPK's Board, has Jeopardized Shareholder Value, and Should Resign Encourages Shareholders with Similar Concerns to Voice Them Eminence to Evaluate All Options to Ensure Board Is Comprised of Individuals Who Are Committed to Protecting Shareholder Value NEW YORK, Dec. 19, 2025 /PRNewswire/ -- Eminence Capital, LP ("Eminence"), a private investmen ...