<div id="readability-page-1"><div>GPK Investors Have Opportunity to Join Graphic Packaging Holding Company Fraud Investigation with the Schall Law Firm The Schall Law Firm, a national shareholder rights litigation firm, announces that it is investigating claims on behalf of investors of Graphic Packaging Holding Company (“Graphic Packaging” or “the Company”) (NYSE: GPK) for violations of the securities laws. The investigation focuses on whether the Company issued false and/or misleading statements and/or failed to disclose information pertinent to investors. Graphic Packaging lowered its full-year core earnings and profit outlook on December 8, 2025. Based on this news, shares of Graphic Packaging fell by more than 8.6% on the next day. If you are a shareholder who suffered a loss, click here to participate. We also encourage you to contact Brian Schall of the Schall Law Firm, 2049 Century Park East, Suite 2460, Los Angeles, CA 90067, at 310-301-3335, to discuss your rights free of charge. You can also reach us through the firm's website at www.schallfirm.com, or by email at bschall@schallfirm.com. The Schall Law Firm represents investors around the world and specializes in securities class action lawsuits and shareholder rights litigation. This press release may be considered Attorney Advertising in some jurisdictions under the applicable law and rules of ethics. <img src="https://imageproxy.pbkrs.com/https://cts.businesswire.com/ct/CT/query-ZGlzdHJvPW54JmlkPWJ3bmV3cyZsYW5nPWVuJnNpZD1tc3RyMyZzdHk9MjAyNTEyMjk1MDMxMDVyMQ?x-oss-process=image/auto-orient,1/interlace,1/resize,w_1440,h_1440/quality,q_95/format,jpg" original-src="https://imageproxy.pbkrs.com/https://cts.businesswire.com/ct/CT/query-ZGlzdHJvPW54JmlkPWJ3bmV3cyZsYW5nPWVuJnNpZD1tc3RyMyZzdHk9MjAyNTEyMjk1MDMxMDVyMQ"/> The Schall Law Firm Brian Schall, Esq. 310-301-3335 info@schallfirm.com www.schallfirm.com View source version on businesswire.com: https://www.businesswire.com/news/home/20251229503105/en/</div></div>

Schall 律师事务所正在代表 Graphic Packaging Holding Company（纽约证券交易所代码：GPK）的投资者调查潜在的证券法违规行为。调查的重点是该公司是否发布了虚假或误导性声明，特别是在 2025 年 12 月 8 日下调全年盈利预期后，导致股价下跌 8.6%。遭受损失的股东被鼓励参与调查，并可以联系该事务所以获取更多信息

GPK 投资者有机会与 Schall 律师事务所合作，参与对 Graphic Packaging Holding Company 的欺诈调查