GRAFTECH INTERNATIONAL LTD

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

(Amendment No. )

Filed by the Registrantx Filed by a Party other than the Registranto

Check the appropriate box:

GRAFTECH INTERNATIONAL LTD.

(Name of Registrant as Specified in its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check all boxes that apply):

March 27, 2026

Dear Stockholders:

We are pleased to invite you to the 2026 Annual Meeting of Stockholders (the “Annual Meeting”) of GrafTech International Ltd. The Annual Meeting will be held on Thursday, May 7, 2026, at 8:00 a.m. Eastern Time. The Board of Directors has determined the Annual Meeting will be held in a virtual format via the Internet again this year.

We use the Internet as our primary means of furnishing proxy materials to our stockholders, including the Notice of Annual Meeting of Stockholders, proxy statement (the “Proxy Statement”) and proxy card (collectively, the “Proxy Materials”). Details about the business to be conducted at the Annual Meeting can be found in the Notice of Annual Meeting of Stockholders and the Proxy Statement. Your vote is important. The Annual Meeting will be held in a virtual format only. Regardless of whether you plan to attend the virtual Annual Meeting, we urge you to vote your shares as soon as possible. We are mailing you a Notice of Internet Availability of Proxy Materials containing instructions on how to access the Proxy Materials and vote your shares. Additional information about voting your shares is included in the Proxy Statement.

On behalf of the Board of Directors, thank you for your continued interest and support.

Sincerely,

Notice of Annual Meeting of Stockholders

The proxy is solicited on behalf of the Board of Directors (the “Board”) of GrafTech International Ltd. (“GrafTech,” “we,” “our” or the “Company”) for use at the 2026 Annual Meeting of Stockholders (the “Annual Meeting”) to be held on May 7, 2026, at 8:00 a.m. Eastern Time, or at any adjournment or postponement thereof, for the purposes set forth herein. The Board has determined that the Annual Meeting will be held in a virtual format via the Internet again this year.

HOW YOU MAY VOTE

The Notice of Internet Availability of Proxy Materials contains instructions on how to access the proxy statement(the “Proxy Statement”) and proxy card (collectively, the “Proxy Materials”), and how to vote your shares. You may vote if you were a stockholder of record at the close of business on March 9, 2026 (the “Record Date”). To ensure that your shares are represented at the Annual Meeting, please vote as soon as possible by one of the following methods:

For more detailed information on voting, please see “How do I cast a vote?” in the “Questions & Answers” section beginning on page 68 of the accompanying Proxy Statement.

Whether or not you expect to attend the virtual Annual Meeting, please vote as soon as possible to ensure representation of your shares at the Annual Meeting. You may vote your shares over the Internet, by telephone or by mail (as applicable) by following the instructions on the proxy card or voting instruction form. The Notice of Internet Availability of Proxy Materials provides information on how stockholders can obtain paper copies of the Proxy Materials, including a proxy card or voting instruction card, as applicable, if they so choose. More information about registering for and attending the virtual Annual Meeting is included in the “Questions & Answers” section of the accompanying Proxy Statement. Except as otherwise noted, the information herein and in the accompanying Proxy Statement is as of March 25, 2026, the date we commenced printing. We made the Proxy Materials available to our stockholderson March 27, 2026.

Important Notice Regarding the Availability of Proxy Materials for the Stockholder Meeting To Be Held on May 7, 2026: The Company’s Notice of the Annual Meeting of Stockholders, Proxy Statement, and 2025 Annual Report to Stockholders are available at: www.envisionreports.com/EAF.

By order of the Board of Directors,

Andrew J. Renacci

Chief Legal Officer & Corporate Secretary

GrafTech International Ltd.982 Keynote CircleBrooklyn Heights, OH 44131

Proxy Statement Guide