Exhibit 99.1

Gulfport Energy Reports First Quarter 2026 Financial and Operational Results

OKLAHOMA CITY (May 5, 2026) Gulfport Energy Corporation (NYSE: GPOR) (“Gulfport” or the “Company”) today reported financial and operational results for the three months ended March 31, 2026, reaffirmed its 2026 development plan and provided an update on its financial position.

First Quarter 2026 and Recent Highlights

Michael Hodges, Executive Vice President and Chief Financial Officer, commented, “Gulfport’s first quarter financial results reflect a strong start to the year and position the Company to successfully deliver on the 2026 development plan outlined in our guidance earlier this year. Strategically, we completed our previously announced discretionary acreage program, investing a total of $102.4 million over the past four quarters to add more than two years of high-quality inventory at values we believe are extremely attractive relative to recent metrics implied by larger inorganic transactions in the immediate area. These low-breakeven additions enhance the durability of our asset base, reinforcing the significant value uplift we are capturing through our organic leasing efforts and we continue to pursue opportunities to further strengthen our resource depth going forward.”

“In addition, supported by our strong balance sheet and liquidity position, we maintained an active share repurchase program during the quarter and repurchased over $170 million of common stock, representing the highest level of quarterly repurchase activity in Company history and exceeding our previously announced plans in February. Since initiating the program, including the preferred redemption in September 2025, we have repurchased more than $1.0 billion of common stock, demonstrating our confidence in the fundamental value of our business and our commitment to delivering substantial returns to our shareholders. Our share repurchase program is likely to remain an attractive use of capital and we plan to continue an active program throughout the remainder of the year,” concluded Hodges.

A company presentation to accompany the Gulfport earnings conference call can be accessed by clicking here.

Gulfport’s net daily production for the first quarter of 2026 averaged 996.8 MMcfe per day, primarily consisting of 833.0 MMcfe per day in the Utica/Marcellus and 163.8 MMcfe per day in the SCOOP. For the first quarter of 2026, Gulfport’s net daily production mix was comprised of approximately 91% natural gas, 7% natural gas liquids (“NGL”) and 2% oil and condensate.

Capital Investment

Capital expenditures were approximately $121.7 million (on an incurred basis) for the first quarter of 2026, of which $117.9 million related to operated drilling and completion activity and $3.9 million related to maintenance land and seismic investment. Gulfport also invested approximately $39.5 million in discretionary acreage acquisitions and incurred approximately $0.2 million related to non-operated drilling and completion activities.

Common Stock Repurchase Program

Gulfport repurchased approximately 866.3 thousand shares of common stock at a weighted-average share price of $199.45 during the first quarter of 2026, totaling approximately $172.8 million. As of March 31, 2026, the Company had repurchased approximately 8.2 million shares of common stock (including the underlying shares of common stock into which the preferred stock was convertible) at a weighted-average share price of $133.02 since the program initiated in March 2022, totaling approximately $1.1 billion in aggregate. As of March 31, 2026, the Company had approximately $406.8 million of remaining capacity under the share repurchase program.

Credit Facility Borrowing Base Redetermination

On May 1, 2026, Gulfport completed its semi-annual borrowing base redetermination during which the borrowing base was reaffirmed at $1.1 billion and the elected commitments were increased by 10% to $1.1 billion.

Financial Position and Liquidity

As of March 31, 2026, Gulfport had approximately $2.9 million of cash and cash equivalents, $182.0 million outstanding borrowings under its revolving credit facility, $48.7 million of letters of credit outstanding and $650.0 million of outstanding 2029 senior notes.

Gulfport’s liquidity at March 31, 2026, totaled approximately $772.2 million, comprised of the $2.9 million of cash and cash equivalents and approximately $769.3 million of available borrowing capacity under its revolving credit facility. Pro forma for the recent increase in elected commitments, Gulfport’s liquidity at March 31, 2026 increases by approximately $100 million to $872.2 million.

Derivatives

Gulfport enters into commodity derivative contracts on a portion of its expected future production volumes to mitigate the Company’s exposure to commodity price fluctuations. For details, please refer to the “Derivatives” section provided with the supplemental financial tables available on our website at ir.gulfportenergy.com.

First Quarter 2026 Conference Call

Gulfport will host a teleconference and webcast to discuss its first quarter of 2026 results beginning at 9:00 a.m. ET (8:00 a.m. CT) on Wednesday, May 6, 2026.

The conference call can be heard live through a link on the Gulfport website, www.gulfportenergy.com. In addition, you may participate in the conference call by dialing 866-373-3408 domestically or 412-902-1039 internationally. A replay of the conference call will be available on the Gulfport website and a telephone audio replay will be available from May 6, 2026 to May 20, 2026, by calling 877-660-6853 domestically or 201-612-7415 internationally and then entering the replay passcode 13759931. 

Financial Statements and Guidance Documents

First quarter of 2026 earnings results and supplemental information regarding quarterly data such as production volumes, pricing, financial statements and non-GAAP reconciliations are available on our website at ir.gulfportenergy.com.

Non-GAAP Disclosures

This news release includes non-GAAP financial measures. Such non-GAAP measures should be not considered as an alternative to GAAP measures. Reconciliations of these non-GAAP measures and other disclosures are provided with the supplemental financial tables available on our website at ir.gulfportenergy.com.

About Gulfport

Gulfport is an independent natural gas-weighted exploration and production company focused on the exploration, acquisition and production of natural gas, crude oil and NGL in the United States with primary focus in the Appalachia and Anadarko basins. Our principal properties are located in eastern Ohio targeting the Utica and Marcellus formations and in central Oklahoma targeting the SCOOP Woodford and SCOOP Springer formations.

Forward Looking Statements

This press release includes “forward-looking statements” for purposes of the safe harbor provisions of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934. Forward-looking statements are statements other than statements of historical fact. They include statements regarding Gulfport’s current expectations, management’s outlook guidance or forecasts of future events, projected cash flow and liquidity, inflation, share repurchases and other return of capital plans, its ability to enhance cash flow and financial flexibility, future production and commodity mix, plans and objectives for future operations, the ability of our employees, portfolio strength and operational leadership to create long-term value and the assumptions on which such statements are based. Gulfport believes the expectations and forecasts reflected in the forward-looking statements are reasonable, Gulfport can give no assurance they will prove to have been correct. They can be affected by inaccurate or changed assumptions or by known or unknown risks and uncertainties. Important risks, assumptions and other important factors that could cause future results to differ materially from those expressed in the forward-looking statements are described under “Risk Factors” in Item 1A of Gulfport’s annual report on Form 10-K for the year ended December 31, 2025 and any updates to those factors set forth in Gulfport’s subsequent quarterly reports on Form 10-Q or current reports on Form 8-K (available at https://www.gulfportenergy.com/investors/sec-filings). Gulfport undertakes no obligation to release publicly any revisions to any forward-looking statements, to report events or to report the occurrence of unanticipated events.

Investors should note that Gulfport announces financial information in SEC filings, press releases and public conference calls. Gulfport may use the Investors section of its website (www.gulfportenergy.com) to communicate with investors. It is possible that the financial and other information posted there could be deemed to be material information. The information on Gulfport’s website is not part of this filing.

Investor Contact:

Jessica Antle – Vice President, Investor Relations

jantle@gulfportenergy.com

405-252-4550

4

Exhibit 99.2

Three months ended March 31, 2026

Supplemental Information of Gulfport Energy

Production Volumes by Asset Area : Three months ended March 31, 2026

Totals may not sum or recalculate due to rounding.

Production and Pricing : Three months ended March 31, 2026

The following table summarizes production and related pricing for the three months ended March 31, 2026, as compared to such data for the three months ended March 31, 2025:

Totals may not sum or recalculate due to rounding.

Consolidated Statements of Income: Three months ended March 31, 2026

(In thousands, except per share data)

(Unaudited)

Consolidated Statement of Cash Flows: Three months ended March 31, 2026

(In thousands)

(Unaudited)

Non-GAAP Reconciliations

Gulfport’s management uses certain non-GAAP financial measures for planning, forecasting and evaluating business and financial performance, and believes that they are useful tools to assess Gulfport’s operating results. Although these are not measures of performance calculated in accordance with generally accepted accounting principles (GAAP), management believes that these financial measures are useful to an investor in evaluating Gulfport because (i) analysts utilize these metrics when evaluating company performance and have requested this information as of a recent practicable date, (ii) these metrics are widely used to evaluate a company’s operating performance, and (iii) we want to provide updated information to investors. Investors should not view these metrics as a substitute for measures of performance that are calculated in accordance with GAAP. In addition, because all companies do not calculate these measures identically, these measures may not be comparable to similarly titled measures of other companies.

These non-GAAP financial measures include adjusted net income, adjusted EBITDA, adjusted free cash flow, and recurring general and administrative expense. A reconciliation of each financial measure to its most directly comparable GAAP financial measure is included in the tables below. These non-GAAP measure should be considered in addition to, but not instead of, the financial statements prepared in accordance with GAAP.

Definitions

Adjusted net income is a non-GAAP financial measure equal to net income (loss) less non-cash derivative loss (gain), non-recurring general and administrative expenses comprised of expenses related to the continued administration of our prior Chapter 11 filing, costs associated with the Chief Executive Officer search, stock-based compensation expenses, other non-material expenses and the tax effect of the adjustments to net income (loss).

Adjusted EBITDA is a non-GAAP financial measure equal to net income (loss), the most directly comparable GAAP financial measure, plus interest expense, income tax expense (benefit), depreciation, depletion, amortization and accretion, non-cash derivative loss (gain), non-recurring general and administrative expenses comprised of expenses related to the continued administration of our prior Chapter 11 filing, costs associated with the Chief Executive Officer search, stock-based compensation and other non-material expenses.

Adjusted free cash flow is a non-GAAP measure defined as adjusted EBITDA plus certain non-cash items that are included in net cash provided by operating activities but excluded from adjusted EBITDA less interest expense, current income tax expense (benefit), capitalized expenses incurred and capital expenditures incurred. Gulfport includes a adjusted free cash flow estimate for 2026. We are unable, however, to provide a quantitative reconciliation of the forward-looking non-GAAP measure to its most directly comparable forward-looking GAAP measure because management cannot reliably quantify certain of the necessary components of such forward-looking GAAP measure. Accordingly, Gulfport is relying on the exception provided by Item 10(e)(1)(i)(B) of Regulation S-K to exclude such reconciliation. Items excluded in net cash provided by (used in) operating activities to arrive at adjusted free cash flow include interest expense, income taxes, capitalized expenses as well as one-time items or items whose timing or amount cannot be reasonably estimated.

Recurring general and administrative expense is a non-GAAP financial measure equal to general and administrative expense (GAAP) plus capitalized general and administrative expense, less non-recurring general and administrative expenses comprised of expenses related to the continued administration of our prior Chapter 11 filing and costs associated with the Chief Executive Officer search. Gulfport includes a recurring general and administrative expense estimate for 2026. We are unable, however, to provide a quantitative reconciliation of the forward-looking non-GAAP measure to its most directly comparable forward-looking GAAP measure because management cannot reliably quantify certain of the necessary components of such forward-looking GAAP measure. Accordingly, Gulfport is relying on the exception provided by Item 10(e)(1)(i)(B) of Regulation S-K to exclude such reconciliation. Items excluded in general and administrative expense to arrive at recurring general and administrative expense include capitalized expenses as well as one-time items or items whose timing or amount cannot be reasonably estimated. The non-GAAP measure recurring general and administrative expenses allows investors to compare Gulfport’s total general and administrative expenses, including capitalization, to peer companies that account for their oil and gas operations using the successful efforts method.

Adjusted Net Income: Three months ended March 31, 2026

(In thousands)

(Unaudited)

Adjusted EBITDA: Three months ended March 31, 2026

(In thousands)

(Unaudited)

Adjusted Free Cash Flow: Three months ended March 31, 2026

(In thousands)

(Unaudited)

Recurring General and Administrative Expenses:

Three months ended March 31, 2026

(In thousands)

(Unaudited)

Page 15 

Exhibit 99.3

Press Release

Gulfport Energy Appoints Domenic J. Dell’Osso, Jr. Chief Executive Officer

Oklahoma City, OK – May 5, 2026 – Gulfport Energy Corporation (NYSE: GPOR) (“Gulfport” or the “Company”) today announced that Domenic “Nick” Dell’Osso, Jr. has been appointed President and Chief Executive Officer, effective May 28, 2026.

“Nick is a highly respected proven leader with the strategic vision, financial discipline and operational expertise to propel Gulfport forward into its next chapter of value creation,” said Timothy J. Cutt, Chairman of the Board. “He brings more than two decades of energy industry leadership and a track record of delivering attractive shareholder returns and leading through complex industry cycles. The Board is confident that Nick’s expertise will serve Gulfport well, and we look forward to working with him to advance the Company’s strategy and create long-term value for all stakeholders.”

“It’s a great honor to join Gulfport at such a pivotal moment for the Company and the industry,” said Dell’Osso. “Demand for energy is rapidly growing and natural gas is at the epicenter of this growth. Gulfport is incredibly well-positioned with a high-quality, deep and concentrated asset base adjacent to growing demand centers, a strong balance sheet and a talented team from top to bottom. The macro environment combined with the uniquely attractive elements of this Company create the foundation for long-term success. I’m excited to join a team focused on strengthening the business and working with customers to become an industry leader at efficiently delivering affordable, reliable natural gas to a growing market. I look forward to working with the Board, the leadership team and employees across the organization to create value for shareholders and further elevate what this Company can achieve.”

Mr. Dell’Osso has more than 20 years of experience in the energy sector, with expertise in corporate strategy, capital markets and mergers and acquisitions, as well as leading companies through periods of transformation to position them for long-term value creation. Most recently, he served as President and Chief Executive Officer of Expand Energy Corporation (NASDAQ: EXE) (formerly Chesapeake Energy Corporation) from 2021 to February 2026. During his tenure as CEO, Expand Energy became the largest natural gas producer in the United States and grew EBITDA and free cash flow significantly. The company also became widely recognized as the capital efficiency and cost leader in every basin of operations, exhibiting disciplined capital allocation to match market conditions and return significant capital to shareholders.

Mr. Dell’Osso joined Chesapeake in 2008, serving in roles of increasing responsibility, including Executive Vice President and Chief Financial Officer from 2010 to 2021. Prior to Chesapeake, he was an investment banker with Jefferies & Co and Banc of America Securities. He earned a Master of Business Administration in Finance from The University of Texas at Austin and a Bachelor’s degree in Economics from Boston College. Mr. Dell’Osso currently serves on the board of Transocean Ltd. (NYSE: RIG).

Following Mr. Dell’Osso’s appointment as Chief Executive Officer on May 28, 2026, the Office of the Chairman will be discontinued and Timothy Cutt, Michael Hodges, Matthew Rucker and Patrick Craine will continue to serve in their roles as non-executive Chairman of the Board, Executive Vice President and Chief Financial Officer, Executive Vice President and Chief Operating Officer and Executive Vice President and Chief Legal and Administrative Officer, respectively.

About Gulfport

Gulfport is an independent, natural gas-weighted exploration and production company focused on the exploration, acquisition and production of natural gas, crude oil and NGL in the United States with primary focus in the Appalachia and Anadarko basins. Our principal properties are located in eastern Ohio targeting the Utica and Marcellus formations and in central Oklahoma targeting the SCOOP Woodford and SCOOP Springer formations.

Investor Contact

Jessica Antle – Vice President, Investor Relations

jantle@gulfportenergy.com

405-252-4550