UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported):

January 5, 2026

GRAPHIC PACKAGING HOLDING COMPANY

(Exact name of registrant as specified in its charter)

Delaware	001-33988	26-0405422
(State or other jurisdictionof incorporation)	(CommissionFile Number)	(IRS EmployerIdentification No.)
(State or other jurisdiction of incorporation)	(Commission File Number)	(IRS Employer Identification No.)

1500 Riveredge Parkway

Atlanta, Georgia 30328

(Address of principal executive offices)

(770) 240-7200

(Registrant’s telephone number, including area code)

~~Not~~Check ~~Applicable~~the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	TradingSymbol	Name of each exchangeon which registered
Title of Each Class	Trading Symbol	Name of Each Exchange on Which Registered
Common Stock, $0.01 par value per share	GPK	New York Stock Exchange

~~Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the~~ Securities ~~Act~~registered ofpursuant ~~1933~~to Section 12(~~§ 230.405 of this chapter~~g) ~~or Rule 12b-2~~ of the ~~Securities Exchange~~ Act: ~~of 1934 (§ 240.12b-2 of this chapter).~~None

~~Emerging~~☐ Indicate by check mark whether the registrant is an emerging growth company ☐as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 75.0102. ~~Regulation~~Departure FDof ~~Disclosure~~Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On January 5, 2026, ~~Robbert~~Graphic ~~Rietbroek,~~Packaging Holding Company (the ~~President~~“Company”) and ~~Chief~~Lauren S. Tashma, the Company’s Executive ~~Officer~~Vice ofPresident, ~~Graphic~~General ~~Packaging~~Counsel ~~Holding~~and ~~Company~~Secretary (the “~~Company~~General Counsel”) initiated a transition process whereby Ms. Tashma will depart from her current role with the Company. To assist with the transition process, ~~released~~Ms. Tashma has relinquished her position with the Company as of January 6, 2026, but retains her positions as an officer or director of certain subsidiaries and remains an employee through the end of the day on March 1, 2026. As a ~~letter~~result of her departure, Ms. Tashma is expected to be eligible for the separation benefits payable upon a separation from service initiated by the Company under the terms of the Company’s ~~employees,~~Executive Severance Plan. Ms. Tashma is expected to enter into a ~~copy~~Release Agreement to memorialize the terms of ~~which~~this isarrangement ~~attached~~that ~~hereto~~will asalso ~~Exhibit~~contain 99a general release of claims.1 The Company also expects to enter into a transition services agreement with Ms. Tashma to support other ongoing matters.

The information contained in this Item 7.01 and in Exhibit 99.1 attached hereto is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities under that section. Furthermore, such information shall not be deemed to be incorporated by reference into any registration statement or other filing of the Company under the Securities Act of 1933, as amended, unless specifically identified as being incorporated by reference therein.

Forward-Looking Statements

Any statements of the Company’s expectations in this report, including but not limited to statements relating to expected free cash flow and execution of Vision 2030 priorities, as well as the expected timing and benefits of the management transition, constitute “forward-looking statements” as defined in the Private Securities Litigation Reform Act of 1995. Such statements are based on currently available information and are subject to various risks and uncertainties that could cause actual results to differ materially from the Company’s present expectations. These risks and uncertainties include, but are not limited to, volatility of the global economy, inflation of and volatility in raw material and energy costs, continuing pressure for lower cost products, new leadership’s ability to implement the Company’s business strategies, including productivity initiatives and cost reduction plans, as well as the Company’s debt level, currency movements and other risks of conducting business internationally, the impact of regulatory and litigation matters, including the continued availability of the Company’s U.S. federal income tax attributes to offset U.S. federal income taxes and the timing related to the Company’s future U.S. federal income tax payments. Undue reliance should not be placed on such forward-looking statements, as such statements speak only as of the date on which they are made and the Company undertakes no obligation to update such statements, except as required by law. Additional information regarding these and other risks is contained in the Company’s periodic filings with the U.S. Securities and Exchange Commission.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

ExhibitNo.		Description
99.1		Letter from Robbert Rietbroek to Company employees dated January 5, 2026.
104		Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

/s/ ~~Alexandra~~Laura O.Lynn ~~Haden~~Church

Assistant General Counsel

Vice President, Assistant General Counsel and Assistant Secretary

Date: January 5, 2026

Date: January 8, 2026

Filing Compare · GRAPHIC PACKAGING HOLDING CO