Exhibit 99.1

Press Release

Gulfport Energy Corporation Reports Second Quarter 2016 Results

OKLAHOMA CITY (August 3, 2016) Gulfport Energy Corporation (NASDAQ: GPOR) (“Gulfport” or the “Company”) today reported financial and operational results for the quarter ended June 30, 2016 and provided an update on its 2016 activities. Key information for the second quarter of 2016 includes the following:

Michael G. Moore, Chief Executive Officer, commented, “With an improving fundamental outlook for natural gas and the recent strengthening in commodity prices, our strong financial position has provided us with the ability to react quickly and increase our activity within the basin. While our previous guidance contemplated a reduction in our program throughout 2016, we now plan to increase our activity in the near-term to take advantage of an improving natural gas market as we enter 2017, providing us leverage at a point in time when we see significant potential for strength in the curve.

When you combine constructive natural gas fundamentals with our high quality asset base, we would expect to further increase our development pace during 2017, above and beyond the three-rig program we have running today. With the natural gas strip above $3.00, we believe our financial position comfortably supports a six-rig program. Based on our current estimates, we anticipate this level of activity would result in year-over-year growth of approximately 20 to 25 percent while spending $675 to $725 million on drilling and completion capex. As we move through the remainder of 2016, we will continue to monitor the pricing environment and refine

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our views as we consider the appropriate level of activities for 2017. Should natural gas prices improve further, we would look to expand our rig count beyond a six-rig scenario. Assuming an eight-rig program, we estimate this level of activity would result in year-over-year growth in 2017 of approximately 25 to 30 percent while spending $850 to $900 million in drilling and completion capex during 2017. These scenarios assume all incremental activity would be added on January 1, 2017, which, due to cycle times, would result in less than a full-year impact to production during 2017. Looking into 2018, we estimate a six-rig program in 2017 would generate nearly 35 percent year-over-growth in 2018 over 2017 and an eight-rig program during 2017 would generate close to 50 percent growth in 2018 over 2017.”

Second Quarter Financial Results

For the second quarter of 2016, Gulfport reported a net loss of $339.8 million, or $2.71 per diluted share, on oil and natural gas revenues of negative $28.2 million. For the second quarter of 2016, EBITDA (as defined and reconciled below) was negative $97.3 million and cash flow from operating activities before changes in operating assets and liabilities (as defined and reconciled below) was $88.5 million. Gulfport’s GAAP net loss for the second quarter of 2016 includes the following items:

Excluding the effect of these items, Gulfport’s financial results for the second quarter of 2016 would have been as follows:

Year-To-Date 2016 Financial Results

For the six-month period ended June 30, 2016, Gulfport reported a net loss of $582.0 million, or $4.91 per diluted share, on oil and natural gas revenues of $128.8 million. For the six-month period ended June 30, 2016, EBITDA (as defined and reconciled below) was negative $39.0 million and cash flow from operating activities before changes in operating assets and liabilities (as defined and reconciled below) was $171.7 million. Gulfport’s GAAP net loss for the six-month period ended June 30, 2016 includes the following items:

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Excluding the effect of these items, Gulfport’s financial results for the six-month period ended June 30, 2016 would have been as follows:

Production and Realized Prices

Gulfport’s net daily production for the second quarter of 2016 averaged approximately 664.7 MMcfe per day. For the second quarter of 2016, Gulfport’s net daily production mix was comprised of approximately 87% natural gas, 7% natural gas liquids and 6% oil. As previously disclosed, Gulfport idled a completion crew during the first quarter of 2016. This caused Gulfport’s 5.4 net second quarter tie-in-lines to be weighted to the last week of June, effectively resulting in no incremental operated production being turned-to-sales during the second quarter.

Gulfport’s realized prices for the second quarter of 2016 were ($1.10) per Mcf of natural gas, $37.23 per barrel of oil and $0.30 per gallon of NGL, resulting in a total equivalent price of ($0.47) per Mcfe. Gulfport’s realized prices for the second quarter of 2016 include an aggregate non-cash derivative loss of $198.7 million. Before the impact of derivatives, realized prices for the second quarter of 2016, including transportation costs, were $1.44 per Mcf of natural gas, $42.00 per barrel of oil and $0.33 per gallon of NGL, for a total equivalent price of $1.81 per Mcfe.

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GULFPORT ENERGY CORPORATION

PRODUCTION SCHEDULE

(Unaudited)

Gulfport is experiencing higher than anticipated gathering line pressures in its dry gas development area of the play which is having a temporary, near-term effect on its production levels. Gulfport and its third-party midstream providers have developed a long-term, multi-phase compression plan for the optimization of its gathering systems and have begun implementing this plan. Over the next several months, Gulfport plans to phase-in pad level compression on a select group of wells. In addition, Gulfport currently expects to begin phasing-in field level compression by year-end 2016. Once operational, the debottlenecking of these surface restrictions is forecasted to result in an uplift to current production and an increase in our production levels as we enter 2017.

Gulfport’s estimated July 2016 net production averaged approximately 620 MMcfe per day. For the third quarter of 2016, Gulfport currently estimates that its net production will range from 685 MMcfe per day to 705 MMcfe per day and full-year 2016 net production guidance remains unchanged at 695 MMcfe per day to 730 MMcfe per day.

2016 Financial Position and Liquidity

For the six-month period ended June 30, 2016, Gulfport’s drilling and completion capital expenditures totaled $230.7 million, midstream capital expenditures totaled $3.0 million and leasehold capital expenditures totaled $32.5 million. In addition, for the six-month period ended June 30, 2016, Gulfport invested approximately $13.7 million in Grizzly Oil Sands ULC, a company in which Gulfport holds an approximate 25% equity interest.

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As of June 30, 2016, Gulfport had cash on hand of approximately $396.4 million. In addition, as of June 30, 2016, Gulfport’s revolving credit facility of $700 million was undrawn and had $494.2 million available for future borrowing after giving effect to outstanding letters of credit totaling $205.8 million.

Operational Update

Utica Shale

In the Utica Shale, Gulfport spud 12 gross and net wells during the second quarter of 2016. In addition, Gulfport turned-to-sales 7 gross (5.4 net) wells during the last week of June 2016 prior to quarter-end. During the second quarter of 2016, net production from Gulfport’s Utica acreage averaged approximately 642.3 MMcfe per day, a decrease of 4% over the first quarter of 2016 and an increase of 40% over the second quarter of 2015.

At present, Gulfport has three operated horizontal rigs drilling in the play and has contracted a fourth horizontal drilling rig to begin operations in September 2016. In addition, Gulfport has elected to add incremental completion activities during the fourth quarter of 2016. Including this incremental activity, Gulfport has now budgeted to drill approximately 42 to 46 gross (36 to 39 net) horizontal wells and turn-to-sales 50 to 56 gross (37 to 41 net) horizontal wells in the Utica.

Southern Louisiana

At its West Cote Blanche Bay and Hackberry fields, Gulfport performed 18 recompletions at the fields during the second quarter of 2016. During the second quarter, net production at the fields totaled approximately 21.5 MMcfe per day.

2016 Capital Budget and Production Guidance

For 2016, Gulfport now estimates total capital expenditures will be in the range of $475 million to $550 million. Gulfport continues to estimate that 2016 average daily production will be in the range of 695 MMcfe to 730 MMcfe per day.

Mr. Moore commented, “We have updated our 2016 budget to include our proposed incremental activity of an additional 17 to 18 net wells drilled and an additional 10 to 11 net wells turned-to-sales on our operated acreage in the Utica during 2016. Our heightened focus on cost reductions and efficiency gains continues to yield positive results, providing a partial offset to this additional capital spend. Although the timing of our incremental activity is expected to have little impact on full-year 2016 results, we believe the buildup in momentum during the second half of the year will provide a meaningful impact on 2017 and beyond.”

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The table below summarizes the Company’s full-year 2016 guidance:

GULFPORT ENERGY CORPORATION

COMPANY GUIDANCE

Derivatives

Gulfport has hedged a portion of its expected production to lock in prices and returns that provide certainty of cash flow to execute on its capital plans. The table below sets forth the Company’s hedging positions as of August 3, 2016.

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GULFPORT ENERGY CORPORATION

COMMODITY DERIVATIVES—HEDGE POSITION AS OF AUGUST 3, 2016

(Unaudited)

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Presentation

An updated presentation has been posted to the Company’s website. The presentation can be found at www.gulfportenergy.com under the “Company Information” section on the “Investor Relations” page. Information on the Company’s website does not constitute a portion of this press release.

Conference Call

Gulfport will hold a conference call on Thursday, August 4, 2016 at 8:00 a.m. CDT to discuss its second quarter of 2016 financial and operational results and to provide an update on the Company’s recent activities.

Interested parties may listen to the call via Gulfport’s website at www.gulfportenergy.com or by calling toll-free at 866-373-3408 or 412-902-1039 for international callers. The passcode for the call is 13640897. A replay of the call will be available for two weeks at 877-660-6853 or 201-612-7415 for international callers. The replay passcode is 13640897. The webcast will also be available for two weeks on the Company’s website and can be accessed on the Company’s “Investor Relations” page.

About Gulfport

Gulfport Energy Corporation is an Oklahoma City-based independent oil and natural gas exploration and production company with its principal producing properties located in the Utica Shale of Eastern Ohio and along the Louisiana Gulf Coast. In addition, Gulfport holds a sizeable acreage position in the Alberta Oil Sands in Canada through its 25% interest in Grizzly Oil Sands ULC.

Forward Looking Statements

This press release includes “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended (the “Securities Act”), and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). All statements, other than statements of historical facts, included in this press release that address activities, events or developments that Gulfport expects or anticipates will or may occur in the future, future capital expenditures (including the amount and nature thereof), business strategy and measures to implement strategy, competitive strength, goals, expansion and growth of Gulfport’s business and operations, plans, market conditions, references to future success, reference to intentions as to future matters and other such matters are forward-looking statements. These statements are based on certain assumptions and analyses made by Gulfport in light of its experience and its perception of historical trends, current conditions and expected future developments as well as other factors it believes are appropriate in the circumstances. However, whether actual results and developments will conform with Gulfport’s expectations and predictions is subject to a number of risks and uncertainties, general economic, market, credit or business conditions; the opportunities (or lack thereof) that may be presented to and pursued by Gulfport; Gulfport’s ability to identify, complete and integrate acquisitions of properties and businesses; competitive actions by other oil and gas companies; changes in laws or regulations; and other factors, many of which are beyond

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the control of Gulfport. Information concerning these and other factors can be found in the Company’s filings with the Securities and Exchange Commission, including its Forms 10-K, 10-Q and 8-K. Consequently, all of the forward-looking statements made in this news release are qualified by these cautionary statements and there can be no assurances that the actual results or developments anticipated by Gulfport will be realized, or even if realized, that they will have the expected consequences to or effects on Gulfport, its business or operations. Gulfport has no intention, and disclaims any obligation, to update or revise any forward-looking statements, whether as a result of new information, future results or otherwise.

Non-GAAP Financial Measures

EBITDA is a non-GAAP financial measure equal to net (loss) income, the most directly comparable GAAP financial measure, plus interest expense, income tax (benefit) expense, accretion expense, depreciation, depletion and amortization and impairment of oil and gas properties. Adjusted EBITDA is a non-GAAP financial measure equal to EBITDA less non-cash derivative loss, loss from impairment of Grizzly equity investment and loss from equity method investments. Cash flow from operating activities before changes in operating assets and liabilities is a non-GAAP financial measure equal to cash provided by operating activity before changes in operating assets and liabilities. Adjusted net income is a non-GAAP financial measure equal to pre-tax net loss less non-cash derivative loss, loss from impairment of oil and gas properties, impairment of Grizzly equity investment and loss from equity method investments plus tax benefit excluding adjustments. The Company has presented EBITDA and adjusted EBITDA because it uses these measures as an integral part of its internal reporting to evaluate its performance and the performance of its senior management. These measures are considered important indicators of the operational strength of the Company’s business and eliminate the uneven effect of considerable amounts of non-cash depletion, depreciation of tangible assets and amortization of certain intangible assets. A limitation of these measures, however, is that they do not reflect the periodic costs of certain capitalized tangible and intangible assets used in generating revenues in the Company’s business. Management evaluates the costs of such tangible and intangible assets and the impact of related impairments through other financial measures, such as capital expenditures, investment spending and return on capital. Therefore, the Company believes that these measures provide useful information to its investors regarding its performance and overall results of operations. EBITDA, adjusted EBITDA, adjusted net income and cash flow from operating activities before changes in operating assets and liabilities are not intended to be performance measures that should be regarded as an alternative to, or more meaningful than, either net income as an indicator of operating performance or to cash flows from operating activities as a measure of liquidity. In addition, EBITDA, adjusted EBITDA, adjusted net income and cash flow from operating activities before changes in operating assets and liabilities are not intended to represent funds available for dividends, reinvestment or other discretionary uses, and should not be considered in isolation or as a substitute for measures of performance prepared in accordance with GAAP. The EBITDA, adjusted EBITDA, adjusted net income and cash flow from operating activities before changes in operating assets and liabilities presented in this press release may not be comparable to similarly titled measures presented by other companies, and may not be identical to corresponding measures used in the Company’s various agreements.

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Investor & Media Contact:

Paul Heerwagen – Vice President, Corporate Development

pheerwagen@gulfportenergy.com

405-242-4888

Jessica Wills – Manager, Investor Relations and Research

jwills@gulfportenergy.com

405-242-4421

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GULFPORT ENERGY CORPORATION

CONSOLIDATED STATEMENTS OF OPERATIONS

(Unaudited)

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GULFPORT ENERGY CORPORATION

CONSOLIDATED BALANCE SHEETS

(Unaudited)

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GULFPORT ENERGY CORPORATION

RECONCILIATION OF EBITDA AND CASH FLOW

(Unaudited)

GULFPORT ENERGY CORPORATION

RECONCILIATION OF ADJUSTED EBITDA

(Unaudited)

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GULFPORT ENERGY CORPORATION

RECONCILIATION OF ADJUSTED NET INCOME

(Unaudited)

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