Law Offices of Howard G. Smith announces it is investigating potential claims against the board of directors of Graphic Packaging Holding Company (“Graphic Packaging” or the “Company”) (NYSE: GPK) concerning whether the board breached its fiduciary duties to shareholders.

IF YOU ARE A GRAPHIC PACKAGING HOLDING COMPANY (GPK) SHAREHOLDER, CONTACT THE LAW OFFICES OF HOWARD G. SMITH TO PARTICIPATE.

Contact the Law Offices of Howard G. Smith to discuss your legal rights by email at howardsmith@howardsmithlaw.com, by telephone at (215) 638-4847 or visit our website at www.howardsmithlaw.com.

What Happened?

In December 2025, a shareholder owning 4.2% of the Company’s stock issued a letter in response to Graphic Packaging’s announcement that Robbert E. Rietbroek would replace Michael Doss as CEO. Weeks later, the Company’s Executive Vice President and General Counsel departed her roles.

Our investigation concerns whether the Company’s board of directors breached its fiduciary duties to shareholders and/or grossly mismanaged the Company in connection with the above events.

Contact Us To Participate or Learn More:

If you still hold Graphic Packaging shares purchased before December, 2025 and wish to discuss this matter with us, or would like to learn more about these claims, or have any questions concerning this announcement or your rights or interests with respect to these matters, please contact us:

Law Offices of Howard G. Smith,

3070 Bristol Pike, Suite 112,

Bensalem, Pennsylvania 19020,

Telephone: (215) 638-4847

Email: howardsmith@howardsmithlaw.com

Visit our website at: www.howardsmithlaw.com.

This press release may be considered Attorney Advertising in some jurisdictions under the applicable law and ethical rules.

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