INVESTOR ALERT: Pomerantz Law Firm Investigates Claims On Behalf of Investors of Graphic Packaging Holding Company - GPK

Core Viewpoint - Pomerantz LLP is investigating potential securities fraud or unlawful business practices involving Graphic Packaging Holding Company and its executives [1] Group 1: Company Performance - On December 8, 2025, Graphic Packaging announced a restructuring of its support functions and production optimization initiatives, leading to a lowered full-year core earnings and profit outlook due to ongoing production curtailments [3] - The company now expects Adjusted EBITDA to be in the range of $1.38 billion to $1.43 billion, a decrease from the previous guidance of $1.40 billion to $1.45 billion [3] Group 2: Market Reaction - Following the announcement of the lowered earnings outlook, Graphic Packaging's stock price fell by $1.35 per share, or 8.66%, closing at $14.23 per share on December 9, 2025 [4]