Additional Proxy Soliciting Materials (Form DEFA14A)

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

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Schedule 14A

Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934
(Amendment No. )

________________

Check the appropriate box:

Gulfport Energy Corporation

(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):

Online Go to www.envisionreports.com/GPOR or scan the QR code - login details are located in the shaded bar below. Votes submitted electronically must be received by 11:59pm, Central Time, on May 26, 2026.Shareholder Meeting Notice Important Notice Regarding the Availability of Proxy Materials for the Gulfport Energy Corporation Shareholders Meeting to be Held on May 27, 2026 Under Securities and Exchange Commission rules, you are receiving this notice that the proxy materials for the annual shareholders' meeting are available on the Internet. Follow the instructions below to view the materials and vote online or request a copy. The items to be voted on and location of the annual meeting are on the reverse side. Your vote is important! This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. We encourage you to access and review all of the important information contained in the proxy materials before voting. The proxy statement, annual report and notice to shareholders are available at: www.envisionreports.com/GPOR Easy Online Access - View your proxy materials and vote. Step 1: Go to www.envisionreports.com/GPOR. Step 2: Click on Cast Your Vote or Request Materials. Step 3: Follow the instructions on the screen to log in. Step 4: Make your selections as instructed on each screen for your delivery preferences. Step 5: Vote your shares. When you go online, you can also help the environment by consenting to receive electronic delivery of future materials. Obtaining a Copy of the Proxy Materials - If you want to receive a copy of the proxy materials, you must request one. There is no charge to you for requesting a copy. Please make your request as instructed on the reverse side on or before May 17, 2026 to facilitate timely delivery. 2 N O T 049ZCB

Shareholder Meeting Notice The 2026 Annual Meeting of Gulfport Energy Corporation shareholders to be held on May 27, 2026, 9:00am Central Time at 713 Market Drive, Oklahoma City, OK 73114. Proposals to be voted on at the meeting are listed below along with the Board of Directors' recommendations. The Board of Directors recommend a vote FOR all the nominees listed and FOR Proposals 2 and 3: 1. Proposal to elect six directors to serve until the Company's 2027 Annual Meeting of Shareholders or until their respective successors have been duly elected and qualified (the Election of Directors Proposal or Proposal 1): - Timothy Cutt - David Wolf - Jason Martinez - Jeannie Powers - David Reganato - Mary Shafer-Malicki 2. Proposal to ratify the appointment of Grant Thornton LLP as the Company's independent auditors for the fiscal year ending December 31, 2026 (the Auditors Ratification Proposal or Proposal 2). 3. Proposal to approve, on an advisory, non-binding basis, the compensation paid to the Company's named executive officers as described in this proxy statement (the Say-On-Pay Proposal or Proposal 3). PLEASE NOTE - YOU CANNOT VOTE BY RETURNING THIS NOTICE. To vote your shares you must go online or request a paper copy of the proxy materials to receive a proxy card. Here's how to order a copy of the proxy materials and select delivery preferences: Current and future delivery requests can be submitted using the options below. If you request an email copy, you will receive an email with a link to the current meeting materials. PLEASE NOTE: You must use the number in the shaded bar on the reverse side when requesting a copy of the proxy materials. - Internet - Go to www.envisionreports.com/GPOR. Click Cast Your Vote or Request Materials. - Phone - Call us free of charge at 1-866-641-4276. - Email - Send an email to [email protected] with "Proxy Materials Gulfport Energy Corporation" in the subject line. Include your full name and address, plus the number located in the shaded bar on the reverse side, and state that you want a paper copy of the meeting materials. To facilitate timely delivery, all requests for a paper copy of proxy materials must be received by May 17, 2026.