ATLANTA, Dec. 8, 2025 /PRNewswire/ -- Graphic Packaging Holding Company (NYSE: GPK) ("Graphic Packaging" or the "Company"), a global leader in sustainable consumer packaging, today announced additional details on its support function and production optimization plans.  As disclosed on the Company's third quarter 2025 earnings conference call, Graphic Packaging has undertaken a review of support functions and corporate expenses and now expects savings of approximately $60 million in staffing and other cost ...