Biggest change(2) The three gross wells that were drilled in 2024 were completed as producing wells as of December 31, 2024. 11 Table of Contents Index to Financial Statements Production, Prices and Production Costs The following table presents our production volumes, average prices received and average production costs during the periods indicated (sales totals in thousands): Year Ended December 31, 2024 Year Ended December 31, 2023 Year Ended December 31, 2022 Natural gas sales Natural gas production volumes (MMcf) 354,154 350,306 322,366 Natural gas production volumes (MMcf) per day 968 960 883 Total sales $ 714,160 $ 831,812 $ 1,998,452 Average price without the impact of derivatives ($/Mcf) $ 2.02 $ 2.37 $ 6.20 Impact from settled derivatives ($/Mcf) $ 0.80 $ 0.42 $ (3.11) Average price, including settled derivatives ($/Mcf) $ 2.82 $ 2.79 $ 3.09 Oil and condensate sales Oil and condensate production volumes (MBbl) 1,459 1,363 1,610 Oil and condensate production volumes (MBbl) per day 4 4 4 Total sales $ 101,589 $ 99,854 $ 147,444 Average price without the impact of derivatives ($/Bbl) $ 69.64 $ 73.27 $ 91.58 Impact from settled derivatives ($/Bbl) $ 0.11 $ (2.53) $ (24.32) Average price, including settled derivatives ($/Bbl) $ 69.75 $ 70.74 $ 67.26 NGL sales NGL production volumes (MBbl) 3,818 4,386 4,483 NGL production volumes (MBbl) per day 10 12 12 Total sales $ 112,855 $ 119,717 $ 184,963 Average price without the impact of derivatives ($/Bbl) $ 29.56 $ 27.29 $ 41.26 Impact from settled derivatives ($/Bbl) $ (0.56) $ 2.07 $ (2.80) Average price, including settled derivatives ($/Bbl) $ 29.00 $ 29.36 $ 38.46 Natural gas, oil and condensate and NGL sales Natural gas equivalents (MMcfe) 385,814 384,802 358,924 Natural gas equivalents (MMcfe) per day 1,054 1,054 983 Total sales $ 928,604 $ 1,051,383 $ 2,330,859 Average price without the impact of derivatives ($/Mcfe) $ 2.41 $ 2.73 $ 6.49 Impact from settled derivatives ($/Mcfe) $ 0.73 $ 0.40 $ (2.94) Average price, including settled derivatives ($/Mcfe) $ 3.14 $ 3.13 $ 3.55 Production Costs: Average lease operating expenses ($/Mcfe) $ 0.18 $ 0.18 $ 0.18 Average taxes other than income ($/Mcfe) 0.08 0.09 0.17 Average transportation, gathering, processing and compression ($/Mcfe) 0.91 0.91 1.00 Total lease operating expenses, midstream costs and taxes other than income ($/Mcfe) $ 1.17 $ 1.17 $ 1.34 Totals may not sum or recalculate due to rounding. 12 Table of Contents Index to Financial Statements The following table provides a summary of our production, average sales prices and average production costs for oil and gas fields containing 15% or more of our total proved reserves as of December 31, 2024: Year Ended December 31, 2024 Year Ended December 31, 2023 Year Ended December 31, 2022 Utica & Marcellus Net Production Natural gas (MMcf) 296,548 279,428 246,123 Oil (MBbl) 847 255 244 NGL (MBbl) 1,072 856 885 Total (MMcfe) 308,060 286,095 252,895 Average price without the impact of derivatives: Natural gas ($/Mcf) $ 1.99 $ 2.34 $ 6.14 Oil ($/Bbl) $ 66.84 $ 70.18 $ 90.60 NGL ($/Bbl) $ 37.01 $ 33.63 $ 48.21 Production Costs: Average lease operating expenses ($/Mcfe) $ 0.16 $ 0.16 $ 0.17 Average taxes other than income ($/Mcfe) 0.06 0.05 0.06 Average transportation, gathering, processing and compression ($/Mcfe) 0.93 0.97 1.08 Total lease operating expenses, midstream costs and taxes other than income ($/Mcfe) $ 1.15 $ 1.18 $ 1.31 SCOOP Net Production Natural gas (MMcf) 57,605 70,878 76,242 Oil (MBbl) 612 1,108 1,366 NGL (MBbl) 2,746 3,530 3,598 Total (MMcfe) 77,753 98,707 106,024 Average price without the impact of derivatives: Natural gas ($/Mcf) $ 2.13 $ 2.53 $ 6.38 Oil ($/Bbl) $ 73.51 $ 73.98 $ 91.71 NGL ($/Bbl) $ 26.65 $ 25.76 $ 39.56 Production Costs: Average lease operating expenses ($/Mcfe) $ 0.28 $ 0.25 $ 0.20 Average taxes other than income ($/Mcfe) 0.13 0.17 0.38 Average transportation, gathering, processing and compression ($/Mcfe) 0.83 0.73 0.78 Total lease operating expenses, midstream costs and taxes other than income ($/Mcfe) $ 1.24 $ 1.15 $ 1.36 Our Investments Grizzly Oil Sands .
Biggest change(2) The two gross operated wells that were drilled in 2025 were completed as producing wells as of December 31, 2025. 11 Table of Contents Index to Financial Statements Production, Prices and Production Costs The following table presents our production volumes, average prices received and average production costs during the periods indicated (sales totals in thousands): Year Ended December 31, 2025 Year Ended December 31, 2024 Year Ended December 31, 2023 Natural gas sales Natural gas production volumes (MMcf) 338,296 354,154 350,306 Natural gas production volumes (MMcf) per day 927 968 960 Total sales $ 1,056,429 $ 714,160 $ 831,812 Average price without the impact of derivatives ($/Mcf) $ 3.12 $ 2.02 $ 2.37 Impact from settled derivatives ($/Mcf) $ 0.14 $ 0.80 $ 0.42 Average price, including settled derivatives ($/Mcf) $ 3.26 $ 2.82 $ 2.79 Oil and condensate sales Oil and condensate production volumes (MBbl) 2,260 1,459 1,363 Oil and condensate production volumes (MBbl) per day 6 4 4 Total sales $ 133,644 $ 101,589 $ 99,854 Average price without the impact of derivatives ($/Bbl) $ 59.12 $ 69.64 $ 73.27 Impact from settled derivatives ($/Bbl) $ 4.04 $ 0.11 $ (2.53) Average price, including settled derivatives ($/Bbl) $ 63.16 $ 69.75 $ 70.74 NGL sales NGL production volumes (MBbl) 4,554 3,818 4,386 NGL production volumes (MBbl) per day 12 10 12 Total sales $ 133,454 $ 112,855 $ 119,717 Average price without the impact of derivatives ($/Bbl) $ 29.30 $ 29.56 $ 27.29 Impact from settled derivatives ($/Bbl) $ (0.07) $ (0.56) $ 2.07 Average price, including settled derivatives ($/Bbl) $ 29.23 $ 29.00 $ 29.36 Natural gas, oil and condensate and NGL sales Natural gas equivalents (MMcfe) 379,182 385,814 384,802 Natural gas equivalents (MMcfe) per day 1,039 1,054 1,054 Total sales $ 1,323,527 $ 928,604 $ 1,051,383 Average price without the impact of derivatives ($/Mcfe) $ 3.49 $ 2.41 $ 2.73 Impact from settled derivatives ($/Mcfe) $ 0.15 $ 0.73 $ 0.40 Average price, including settled derivatives ($/Mcfe) $ 3.64 $ 3.14 $ 3.13 Production Costs: Average lease operating expenses ($/Mcfe) $ 0.22 $ 0.18 $ 0.18 Average taxes other than income ($/Mcfe) 0.08 0.08 0.09 Average transportation, gathering, processing and compression ($/Mcfe) 0.95 0.91 0.91 Total lease operating expenses, midstream costs and taxes other than income ($/Mcfe) $ 1.25 $ 1.17 $ 1.17 Totals may not sum or recalculate due to rounding. 12 Table of Contents Index to Financial Statements The following table provides a summary of our production, average sales prices and average production costs for oil and gas fields containing 15% or more of our total proved reserves as of December 31, 2025: Year Ended December 31, 2025 Year Ended December 31, 2024 Year Ended December 31, 2023 Utica & Marcellus Net Production Natural gas (MMcf) 283,667 296,548 279,428 Oil (MBbl) 1,729 847 255 NGL (MBbl) 2,183 1,072 856 Total (MMcfe) 307,137 308,060 286,095 Average price without the impact of derivatives: Natural gas ($/Mcf) $ 3.11 $ 1.99 $ 2.34 Oil ($/Bbl) $ 58.06 $ 66.84 $ 70.18 NGL ($/Bbl) $ 34.87 $ 37.01 $ 33.63 Production Costs: Average lease operating expenses ($/Mcfe) $ 0.20 $ 0.16 $ 0.16 Average taxes other than income ($/Mcfe) 0.05 0.06 0.05 Average transportation, gathering, processing and compression ($/Mcfe) 0.96 0.93 0.97 Total lease operating expenses, midstream costs and taxes other than income ($/Mcfe) $ 1.21 $ 1.15 $ 1.18 SCOOP Net Production Natural gas (MMcf) 54,629 57,605 70,878 Oil (MBbl) 531 612 1,108 NGL (MBbl) 2,371 2,746 3,530 Total (MMcfe) 72,045 77,753 98,707 Average price without the impact of derivatives: Natural gas ($/Mcf) $ 3.19 $ 2.13 $ 2.53 Oil ($/Bbl) $ 62.59 $ 73.51 $ 73.98 NGL ($/Bbl) $ 24.18 $ 26.65 $ 25.76 Production Costs: Average lease operating expenses ($/Mcfe) $ 0.31 $ 0.28 $ 0.25 Average taxes other than income ($/Mcfe) 0.17 0.13 0.17 Average transportation, gathering, processing and compression ($/Mcfe) 0.88 0.83 0.73 Total lease operating expenses, midstream costs and taxes other than income ($/Mcfe) $ 1.36 $ 1.24 $ 1.15 Our Investments Grizzly Oil Sands .
This policy insures against certain sudden and accidental risks associated with drilling, completing and operating our wells. This insurance may not be adequate to cover all losses or exposure to liability. We also carry a $51 million comprehensive general liability umbrella insurance program.
This policy insures against certain sudden and accidental risks associated with drilling, completing and operating our wells. This insurance may not be adequate to cover all losses or exposure to liability. We also carry a $51 million comprehensive general liability and umbrella insurance program.
These procedures, which are intended to ensure reliability of reserve estimations, include the following: • review and verification of historical production, operating, marketing and capital data, which data is based on actual production as reported by us; • verification of property ownership by our land department; • audit of year-end reserve estimates by NSAI; • direct reporting responsibilities by our reservoir engineering department to our Chief Executive Officer; • review by our reservoir engineering department of all of our reported proved reserves at the close of each quarter, including the review of all significant reserve changes and all new proved undeveloped reserves additions; • provision of quarterly updates to our Board of Directors regarding operational data, including production, drilling and completion activity levels and any significant changes in our reserves; • annual review by our Board of Directors of our year-end reserve report and year-over-year changes in our proved reserves; • annual review by our senior management of adjustments to our previously adopted development plan and considerations involved in making such adjustments, including the substitution, removal or deferral of PUD locations; and • annual review and approval by our senior management and our Board of Directors of a multi-year development plan. 6 Table of Contents Index to Financial Statements The tables below set forth information as of December 31, 2024, with respect to our estimated proved developed and undeveloped oil, natural gas and NGL reserves, the associated estimated future net revenue, the PV-10 and the standardized measure.
These procedures, which are intended to ensure reliability of reserve estimations, include the following: • review and verification of historical production, operating, marketing and capital data, which data is based on actual production as reported by us; • verification of property ownership by our land department; • audit of year-end reserve estimates by NSAI; • direct reporting responsibilities by our reservoir engineering department to our Chief Executive Officer; • review by our reservoir engineering department of all of our reported proved reserves at the close of each quarter, including the review of all significant reserve changes and all new proved undeveloped reserves additions; • provision of quarterly updates to our Board of Directors regarding operational data, including production, drilling and completion activity levels and any significant changes in our reserves; • annual review by our Board of Directors of our year-end reserve report and year-over-year changes in our proved reserves; • annual review by our senior management of adjustments to our previously adopted development plan and considerations involved in making such adjustments, including the substitution, removal or deferral of PUD locations; and • annual review and approval by our senior management and our Board of Directors of a multi-year development plan. 6 Table of Contents Index to Financial Statements The tables below set forth information as of December 31, 2025, with respect to our estimated proved developed and undeveloped oil, natural gas and NGL reserves, the associated estimated future net revenue, the PV-10 and the standardized measure.
We focus on making substantive improvements to key areas that impact our employees. During 2024, we continued making significant investments in our talent management and retention processes, including increasing funds allocated to annual salary increases, short-term incentive payments, long-term incentive equity awards, 401(k) matches for eligible employees, and other enhancements to our benefits offerings.
We focus on making substantive improvements to key areas that impact our employees. During 2025, we continued making significant investments in our talent management and retention processes, including increasing funds allocated to annual salary increases, short-term incentive payments, long-term incentive equity awards, 401(k) matches for eligible employees, and other enhancements to our benefits offerings.
These prices should not be interpreted as a prediction of future prices, nor do they reflect the value of our commodity derivative instruments in place as of December 31, 2024. The amounts shown do not give effect to non-property-related expenses, such as corporate general and administrative expenses and debt service, or to depreciation, depletion and amortization.
These prices should not be interpreted as a prediction of future prices, nor do they reflect the value of our commodity derivative instruments in place as of December 31, 2025. The amounts shown do not give effect to non-property-related expenses, such as corporate general and administrative expenses and debt service, or to depreciation, depletion and amortization.
Reinhart began his career in the United States Army, serving tours in Panama and Iraq. Mr. Reinhart graduated from West Virginia University with a Bachelor of Science degree in Mechanical Engineering. Michael Hodges, Executive Vice President and Chief Financial Officer On April 3, 2023, the Board of Directors appointed Mr. Hodges, 46, as Executive Vice President and Chief Financial Officer.
Reinhart began his career in the United States Army, serving tours in Panama and Iraq. Mr. Reinhart graduated from West Virginia University with a Bachelor of Science degree in Mechanical Engineering. Michael Hodges, Executive Vice President and Chief Financial Officer On April 3, 2023, the Board of Directors appointed Mr. Hodges, 47, as Executive Vice President and Chief Financial Officer.
Revisions represent changes in previous reserve estimates, either upward or downward, resulting from development plan changes, new information normally obtained from development drilling and production history or a change in economic factors, such as commodity prices, operating costs or development costs. We experienced total downward revisions of 406 Bcfe in estimated proved reserves.
Revisions represent changes in previous reserve estimates, either upward or downward, resulting from development plan changes, new information normally obtained from development drilling and production history or a change in economic factors, such as commodity prices, operating costs or development costs. We experienced total downward revisions of 38 Bcfe in estimated proved reserves.
Rucker, 39, joined Gulfport as the Senior Vice President of Operations in March 2023. On February 24, 2025, Matthew Rucker was promoted to Executive Vice President and Chief Operating Officer. He joined Gulfport from Javelin Energy Partners where he previously served as Vice President of Production Operations starting in August 2022. Mr.
Rucker, 40, joined Gulfport as the Senior Vice President of Operations in March 2023. On February 24, 2025, Matthew Rucker was promoted to Executive Vice President and Chief Operating Officer. He joined Gulfport from Javelin Energy Partners where he previously served as Vice President of Production Operations starting in August 2022. Mr.
Additional information regarding estimates of proved reserves, proved developed reserves and proved undeveloped reserves at December 31, 2024, 2023 and 2022, and changes in proved reserves during the last three years are contained in the Supplemental Information on Oil and Gas Exploration and Production Activities, or Supplemental Information , in Note 20 of our consolidated financial statements.
Additional information regarding estimates of proved reserves, proved developed reserves and proved undeveloped reserves at December 31, 2025, 2024 and 2023, and changes in proved reserves during the last three years are contained in the Supplemental Information on Oil and Gas Exploration and Production Activities, or Supplemental Information , in Note 20 of our consolidated financial statements.
Craine, 52, has served as Chief Legal and Administrative Officer since June 2021 and joined Gulfport as Executive Vice President, General Counsel and Corporate Secretary in May 2019. Prior to joining the Company, Mr. Craine served as Deputy General Counsel – Chief Risk and Compliance Officer at Chesapeake Energy Corporation. Prior to joining Chesapeake in 2013, Mr.
Craine, 53, has served as Chief Legal and Administrative Officer since June 2021 and joined Gulfport as Executive Vice President, General Counsel and Corporate Secretary in May 2019. Prior to joining the Company, Mr. Craine served as Deputy General Counsel – Chief Risk and Compliance Officer at Chesapeake Energy Corporation. Prior to joining Chesapeake in 2013, Mr.
Extensions and discoveries. These are additions to our proved reserves that result from extension of the proved acreage of previously discovered reservoirs through additional drilling in periods subsequent to discovery. Extensions of approximately 547 Bcfe of proved reserves were primarily attributable to the continued development of our Utica/Marcellus and SCOOP acreage.
Extensions and discoveries. These are additions to our proved reserves that result from extension of the proved acreage of previously discovered reservoirs through additional drilling in periods subsequent to discovery. Extensions of approximately 701 Bcfe of proved reserves were primarily attributable to the continued development of our Utica/Marcellus and SCOOP acreage.
Over the course of 2024, Gulfport continued to develop and revise Company policies, including those intended to implement our Business Code of Conduct and Ethics, which provides a framework for how we interact with our employees, vendors and other stakeholders when conducting our operations.
Over the course of 2025, Gulfport continued to develop and revise Company policies, including those intended to implement our Business Code of Conduct and Ethics, which provides a framework for how we interact with our employees, vendors and other stakeholders when conducting our operations.
Executive Officers John Reinhart, President, Chief Executive Officer and Director On January 18, 2023, the Board of Directors appointed Mr. Reinhart, 56, as President, Chief Executive Officer and Director, effective as of January 24, 2023. Mr. Reinhart joined the Company with over two decades of oil and gas industry leadership experience.
Executive Officers John Reinhart, President, Chief Executive Officer and Director On January 18, 2023, the Board of Directors appointed Mr. Reinhart, 57, as President, Chief Executive Officer and Director, effective as of January 24, 2023. Mr. Reinhart joined the Company with over two decades of oil and gas industry leadership experience.
For the purpose of determining prices used in our reserve reports, we used the unweighted arithmetic average of the prices on the first day of each month within the 12-month period ended December 31, 2024.
For the purpose of determining prices used in our reserve reports, we used the unweighted arithmetic average of the prices on the first day of each month within the 12-month period ended December 31, 2025.
We have approximately 208,000 net reservoir acres located primarily in Belmont, Harrison, Jefferson and Monroe Counties in eastern Ohio where the Utica ranges in thickness from 600 to over 750 feet. The Marcellus covers hydrocarbon-bearing rock formations that overlay the Utica.
We have approximately 223,000 net reservoir acres located primarily in Belmont, Harrison, Jefferson and Monroe Counties in eastern Ohio where the Utica ranges in thickness from 600 to over 750 feet. The Marcellus covers hydrocarbon-bearing rock formations that generally overlay the Utica in Ohio.
Our leasehold management efforts include scheduling our operations to establish production in paying quantities in order to hold leases prior to the expiration dates, paying the prescribed lease extension payments, planning non-core divestitures or strategic acreage trades with other operators to high-grade our lease inventory and letting some leases expire that are no longer part of our development plans.
Our leasehold management efforts include scheduling our operations to establish production in paying quantities in order to hold leases prior to the expiration dates, paying the prescribed lease extension payments, planning non-core divestitures or strategic acreage trades with other operators to high-grade our lease inventory and voluntarily allowing certain leases to expire that are no longer part of our development plans.
Our aggregate payments for the retainer and clean-up services during each of 2024, 2023 and 2022 were immaterial.
Our aggregate payments for the retainer and clean-up services during each of 2025, 2024 and 2023 were immaterial.
Estimates of economically recoverable oil and natural gas and of future net revenues are based on a number of variables and assumptions, all of which may vary from actual results, including geologic interpretation, prices and future production rates and costs. See Item 1A. “ Risk Factors ” contained elsewhere in this Form 10-K.
Estimates of economically recoverable oil and natural gas and of future net revenues are based on a number of variables and assumptions, all of which may vary from actual results, including geologic interpretation, prices and future production rates and costs. See Item 1A. “Risk Factors” contained elsewhere in this Form 10-K.
In the SCOOP, we intend to complete drilling on approximately two gross (1.8 net) operated horizontal wells and commence sales on two gross (1.8 net) operated horizontal wells. We expect to fund these expenditures with our operating cash flow and borrowings under our Credit Facility.
In the SCOOP, we intend to complete drilling and commence sales on approximately 2 gross (1.7 net) operated horizontal wells. We expect to fund these expenditures with our operating cash flow and borrowings under our Credit Facility.
We, through our wholly-owned subsidiary Grizzly Holdings Inc., own a 24.5% interest in Grizzly. As of December 31, 2024, Grizzly had approximately 830,000 net acres under lease in the Athabasca, Peace River and Cold Lake oil sands regions of Alberta, Canada. Grizzly's operations have been suspended since 2015. Additionally, Grizzly had no proved reserves as of December 31, 2024.
We, through our wholly-owned subsidiary Grizzly Holdings Inc., own a 24.5% interest in Grizzly. As of December 31, 2025, Grizzly had approximately 639,000 net acres under lease in the Athabasca, Peace River, and Cold Lake regions of Alberta, Canada. Grizzly's operations have been suspended since 2015. Additionally, Grizzly had no proved reserves as of December 31, 2025.
All PUD locations included in our 2024 reserve report are scheduled to be drilled within five years of initial booking. As of December 31, 2024, 1.20% of our total proved reserves were classified as proved developed non-producing.
All PUD locations included in our 2025 reserve report are scheduled to be drilled within five years of initial booking. As of December 31, 2025, 1.77% of our total proved reserves were classified as proved developed non-producing.
In recent years, federal, state and local governments have taken steps to reduce emissions of greenhouse gases (“GHG”). We consider the costs of environmental, safety and health protection and compliance to be necessary, manageable parts of our business.
Federal, state and local governments have periodically taken steps to reduce emissions of greenhouse gases (“GHG”). We consider the costs of environmental, safety and health protection and compliance to be necessary, manageable parts of our business.
The primary targets are a series of porous, low clay and organic-rich packages within the Goddard Shale member ranging in thickness from 50 to over 250 feet. During 2024, we produced approximately 212 MMcfe per day net to our interests in the SCOOP and it accounted for approximately 20% of our total production.
The primary targets are a series of porous, low clay and organic-rich packages within the Goddard Shale member ranging in thickness from 50 to over 250 feet. During 2025, we produced approximately 197 MMcfe per day net to our interests in the SCOOP and it accounted for approximately 19% of our total production.
The present value of estimated future net revenue typically differs from the standardized measure because the former does not include the effects of estimated future income tax expense of $10 million as of December 31, 2024.
The present value of estimated future net revenue typically differs from the standardized measure because the former does not include the effects of estimated future income tax expense of $219 million as of December 31, 2025.
Certain of our U.S. natural gas and oil leases are granted or approved by the federal government and administered by the Bureau of Land Management (BLM) or Bureau of Indian Affairs (BIA) of the Department of the Interior.
Certain of our U.S. natural gas and oil leases are granted or approved by the federal government and administered by the Bureau of Land Management (“BLM”) or Bureau of Indian Affairs (“BIA”) of the Department of the Interior.
Neither PV-10 nor the standardized measure of discounted future net cash flows purport to represent the fair value of our proved oil and gas reserves. 7 Table of Contents Index to Financial Statements The following table summarizes the changes in our estimated proved reserves during 2024 (in Bcfe): Proved Reserves, December 31, 2023 4,214 Sales of oil and natural gas reserves in place — Extensions and discoveries 547 Revisions of prior reserve estimates (406) Current production (386) Proved Reserves, December 31, 2024 3,969 Total may not sum due to rounding.
Neither PV-10 nor the standardized measure of discounted future net cash flows purport to represent the fair value of our proved oil and gas reserves. 7 Table of Contents Index to Financial Statements The following table summarizes the changes in our estimated proved reserves during 2025 (in Bcfe): Proved Reserves, December 31, 2024 3,969 Sales of oil and natural gas reserves in place — Extensions and discoveries 701 Revisions of prior reserve estimates (38) Current production (379) Proved Reserves, December 31, 2025 4,253 Total may not sum due to rounding.
Human Capital Management Employees As of December 31, 2024, we had 235 employees, an increase of approximately 4% from the 226 employees as of December 31, 2023. All of our employees are non-bargaining. The attraction and retention of qualified employees continues to be one of our highest priorities.
Human Capital Management Employees As of December 31, 2025, we had 245 employees, an increase of approximately 5% from the 235 employees as of December 31, 2024. All of our employees are non-bargaining. The attraction and retention of qualified employees continues to be one of our highest priorities.
Extensions and discoveries. Our extensions of approximately 547 Bcfe were primarily attributed to the addition of 62 PUD locations as a result of our current five-year development plan that is focused on generating sustainable cash flow. These additions included 46 PUD locations in the Utica/Marcellus and 16 PUD locations in the SCOOP. Conversion to proved developed reserves.
Extensions and discoveries. Our extensions of approximately 582 Bcfe were primarily attributed to the addition of 41 PUD locations as a result of our current five-year development plan that is focused on generating sustainable cash flow. These additions included 35 PUD locations in the Utica/Marcellus and 6 PUD locations in the SCOOP. Conversion to proved developed reserves.
See “ Definitions ” above for our definition of PV-10 (a non-GAAP financial measure) and “ Oil, Natural Gas and NGL Reserves and Estimation ” below for a reconciliation of our standardized measure of discounted future net cash flows (the most directly comparable GAAP measure) to PV-10.
See “Definitions” above for our definition of PV-10 (a non-GAAP financial measure) and “Oil, Natural Gas and NGL Reserves and Estimation” below for a reconciliation of our standardized measure of discounted future net cash flows (the most directly comparable GAAP measure) to PV-10.
Major Customers Our total natural gas, oil and NGL sales, before the effects of hedging, to major customers (purchasers in excess of 10% of total natural gas, oil and NGL sales) for the years ended December 31, 2024, 2023 and 2022 were as follows: % of Sales Year Ended December 31, 2024 Vitol Inc. 15 % Year Ended December 31, 2023 Vitol Inc. 12 % Year Ended December 31, 2022 ECO-Energy 20 % Clearwater 11 % Competition The oil and natural gas industry is intensely competitive, and we compete with many other companies that have greater resources than we have.
Major Customers Our total natural gas, oil and NGL sales, before the effects of hedging, to major customers (purchasers in excess of 10% of total natural gas, oil and NGL sales) for the years ended December 31, 2025, 2024 and 2023 were as follows: % of Sales Year Ended December 31, 2025 Customer A 14 % Year Ended December 31, 2024 Customer A 15 % Year Ended December 31, 2023 Customer A 12 % Competition The oil and natural gas industry is intensely competitive, and we compete with many other companies that have greater resources than we have.
These downward revisions were offset by upward revisions of 116 Bcfe in estimated proved reserves from a combination of changes including working interest and net revenue interest and well forecasts. Costs incurred relating to the development of PUDs were approximately $326.4 million in 2024.
These downward revisions were offset by upward revisions of 89 Bcfe in estimated proved reserves from a combination of changes including working interest and net revenue interest, well forecasts and price changes. Costs incurred relating to the development of PUDs were approximately $235.9 million in 2025.
We believe our plan to generate free cash flow on an annual basis will allow us to further strengthen our balance sheet, return capital to shareholders and increase our resource depth through incremental leasehold opportunities that provide optionality to our future development plans. 2025 Outlook Our 2025 capital expenditure program is expected to be in a range of $370 million to $395 million.
We believe our plan to generate free cash flow on an annual basis will allow us to further strengthen our balance sheet, return capital to shareholders and increase our resource depth through incremental leasehold opportunities that provide optionality to our future development plans. 2026 Outlook Our 2026 capital expenditure program is expected to be in a range of $400 million to $430 million, including $35 million to $40 million on maintenance land and seismic investments.
PV-10 Sensitivities As noted above, our proved reserves at December 31, 2024, were calculated using prices based on the 12-month unweighted arithmetic average of the first-day-of-the-month price for 2024 of $76.32 per barrel and $2.13 per MMBtu.
PV-10 Sensitivities As noted above, our proved reserves at December 31, 2025, were calculated using prices based on the 12-month unweighted arithmetic average of the first-day-of-the-month price for 2025 of $66.01 per barrel and $3.39 per MMBtu.
The prices used in our PV-10 measure were the average WTI Spot price of $76.32 per barrel and the average Henry Hub Spot price of $2.13 per MMBtu, before basis differential adjustments.
The prices used in our PV-10 measure were the average WTI Spot price of $66.01 per barrel and the average Henry Hub Spot price of $3.39 per MMBtu, before basis differential adjustments.
As needed, we provide historical information to NSAI for our properties such as ownership interest, oil and gas production, well test data, commodity prices, operating and development costs and other considerations, including availability and costs of infrastructure and status of permits. Reserve estimates for the years ended 2023 and 2022, were prepared by NSAI for 100% of our operating areas.
As needed, we provide historical information to NSAI for our properties such as ownership interest, oil and gas production, well test data, commodity prices, operating and development costs and other considerations, including availability and costs of infrastructure and status of permits.
December 31, 2024 Proved Developed Proved Undeveloped Total Proved ($ in millions) Estimated future net revenue (1) $ 1,620 $ 1,876 $ 3,496 Present value of estimated future net revenue (PV-10) (1) $ 1,059 $ 699 $ 1,757 Standardized measure (1) $ 1,747 Totals may not sum due to rounding. _____________________ (1) Estimated future net revenue represents the estimated future revenue to be generated from the production of proved reserves, net of estimated production and future development costs, using prices and costs under existing economic conditions as of December 31, 2024, and assuming commodity prices as set forth below.
December 31, 2025 Proved Developed Proved Undeveloped Total Proved ($ in millions) Estimated future net revenue (1) $ 3,816 $ 3,145 $ 6,961 Present value of estimated future net revenue (PV-10) (1) $ 2,291 $ 1,331 $ 3,622 Standardized measure (1) 3,403 Totals may not sum due to rounding. _____________________ (1) Estimated future net revenue represents the estimated future revenue to be generated from the production of proved reserves, net of estimated production and future development costs, using prices and costs under existing economic conditions as of December 31, 2025, and assuming commodity prices as set forth below.
Holding production and development costs constant, if SEC pricing were $83.95 per barrel and $2.34 per MMBtu, or a 10% increase, this would have resulted in an increase of 87 Bcfe of our total proved reserves and a $0.54 billion increase in PV-10 value at December 31, 2024.
Holding production and development costs constant, if SEC pricing were $72.61 per barrel and $3.73 per MMBtu, or a 10% increase, this would have resulted in an increase of 38 Bcfe of our total proved reserves and a $0.77 billion increase in PV-10 value at December 31, 2025.
ITEM 1. BUSINESS Our Business Gulfport is an independent natural gas-weighted exploration and production company with assets primarily located in the Appalachia and Anadarko basins. Our principal properties are located in eastern Ohio targeting the Utica and Marcellus and in central Oklahoma targeting the SCOOP Woodford and Springer formations.
ITEM 1. BUSINESS Our Business Gulfport is an independent natural gas-weighted exploration and production company with assets primarily located in the Appalachia and Anadarko basins. Our principal operations target the Utica and Marcellus formations in eastern Ohio and the SCOOP Woodford and Springer formations in central Oklahoma. Gulfport's Predecessor was incorporated in the State of Delaware in July 1997.
Holding production and development costs constant, if SEC pricing were $68.69 per barrel and $1.92 per MMBtu, or a 10% decrease, this would have resulted in a decrease of 494 Bcfe of our total proved reserves and a $0.51 billion decrease in PV-10 value at December 31, 2024.
Holding production and development costs constant, if SEC pricing were $59.41 per barrel and $3.05 per MMBtu, or a 10% decrease, this would have resulted in a decrease of 54 Bcfe of our total proved reserves and a $0.77 billion decrease in PV-10 value at December 31, 2025.
Our 2024 development activities resulted in the conversion of approximately 341 Bcfe into proved developed producing reserves, attributable to 16 PUD locations in the Utica and 5 PUD locations in the SCOOP. These 21 PUDs represent a conversion rate of 13% for 2024. Revision of prior reserve estimates.
Our 2025 development activities resulted in the conversion of approximately 417 Bcfe into proved developed producing reserves, attributable to 31 PUD locations in the Utica/Marcellus and 11 PUD locations in the SCOOP. These 42 PUDs represent a conversion rate of 28% for 2025. Revision of prior reserve estimates.
Year Ended December 31, 2024 2023 2022 Gross Net Gross Net Gross Net Development: Productive 21 19.8 24 21.9 25 21.7 Dry — — — — — — Total 21 19.8 24 21.9 25 21.7 Exploratory: Productive — — — — — — Dry — — — — — — Total — — — — — — The following table presents activity by operating area for the year ended December 31, 2024: Operated Non-Operated Field Drilled Turned to Sales Drilled Turned to Sales Gross Net Gross Net Gross Net Gross Net Utica & Marcellus (1) 18.0 17.4 16.0 15.4 16.0 0.1 8.0 0.1 SCOOP (2) 3.0 2.4 3.0 2.4 18.0 0.2 16.0 0.1 Total 21.0 19.8 19.0 17.8 34.0 0.3 24.0 0.2 _____________________ (1) Of the 18 gross wells drilled in 2024, 10 were completed as producing wells and eight were in various stages of drilling and completion as of December 31, 2024.
Year Ended December 31, 2025 2024 2023 Gross Net Gross Net Gross Net Development: Productive 29 28.7 21 19.8 24 21.9 Dry — — — — — — Total 29 28.7 21 19.8 24 21.9 Exploratory: Productive — — — — — — Dry — — — — — — Total — — — — — — The following table presents activity by operating area for the year ended December 31, 2025: Operated Non-Operated Field Drilled Turned to Sales Drilled Turned to Sales Gross Net Gross Net Gross Net Gross Net Utica & Marcellus (1) 27.0 26.9 30.0 30.0 8.0 0.1 14.0 0.0 SCOOP (2) 2.0 1.8 2.0 1.8 18.0 0.1 23.0 0.2 Total 29.0 28.7 32.0 31.8 26.0 0.2 37.0 0.2 _____________________ (1) Of the 27 gross operated wells drilled in 2025, 22 were completed as producing wells and five were in various stages of drilling and completion as of December 31, 2025.
In the Utica, we intend to complete drilling on approximately 17 gross (17.0 net) operated horizontal wells and commence sales on approximately 22 gross (21.9 net) operated horizontal wells. In the Marcellus, we intend to complete drilling on approximately 8 gross (8.0 net) operated horizontal wells and commence sales on approximately 4 gross (4.0 net) operated horizontal wells.
In the Utica, we intend to complete drilling on approximately 18 gross (17.5 net) operated horizontal wells and commence sales on approximately 20 gross (19.5 net) operated horizontal wells. In the Marcellus, we intend to complete drilling on approximately 6 gross (5.6 net) and commence sales on approximately 4 gross (4.0 net) operated horizontal wells.
Proved Undeveloped Reserves As of December 31, 2024, our PUDs totaled 1,478 Bcf of natural gas, 15 MMBbl of oil and 49 MMBbl of NGL, for a total of 1,861 Bcfe. Approximately 80% and 20% of our PUD reserves at year-end 2024 were located in Utica/Marcellus and SCOOP, respectively.
Proved Undeveloped Reserves As of December 31, 2025, our PUDs totaled 1,455 Bcf of natural gas, 16 MMBbl of oil and 50 MMBbl of NGL, for a total of 1,848 Bcfe. Approximately 82% and 18% of our PUD reserves at year-end 2025 were located in Utica/Marcellus and SCOOP, respectively.
During 2024, we repurchased 1.2 million shares for $184.5 million at a weighted average price of $153.35 per share, leaving $415.9 million remaining on our Repurchase Program, which expires on December 31, 2025. Operating Areas Utica/Marcellus - The Utica covers hydrocarbon-bearing rock formations located in the Appalachian Basin of the United States and Canada.
D uring 2025, we repurchased 1.8 million shares for $336.3 million at a weighted average price of $188.65 per share, leaving $579.6 million remaining on our Repurchase Program, which expires on December 31, 2026. Operating Areas Utica/Marcellus - The Utica covers hydrocarbon-bearing rock formations located in the Appalachian Basin of the United States and Canada.
Refer to Note 20 of our consolidated financial statements for more information pertaining to our proved reserves and the preparation of such estimates. Our Senior Vice President of Reservoir Engineering is primarily responsible for overseeing the preparation of all of our reserve estimates. He is a petroleum engineer with over 28 years of reservoir and operations experience.
Refer to Note 20 of our consolidated financial statements for more information pertaining to our proved reserves and the preparation of such estimates. 5 Table of Contents Index to Financial Statements Our Senior Vice President of Reservoir Engineering is primarily responsible for overseeing the preparation of all of our reserve estimates.
After a development plan has been adopted, we may periodically make adjustments to the approved development plan due to events and circumstances that have occurred subsequent to the time the plan was approved.
The PUD locations identified in our development plan are determined based on an analysis of the information that we have available at that time. After a development plan has been adopted, we may periodically make adjustments to the approved development plan due to events and circumstances that have occurred subsequent to the time the plan was approved.
The executive officers serve at the pleasure of the Company's Board of Directors. 19 Table of Contents Index to Financial Statements
Each executive officer serves at the discretion of the Board of Directors. 19 Table of Contents Index to Financial Statements
We cannot predict with any reasonable degree of certainty our future exposure concerning such matters. 15 Table of Contents Index to Financial Statements Our operations are also subject to conservation regulations, including the regulation of the size of drilling and spacing units or proration units, the number of wells that may be drilled in a unit, the rate of production allowable from oil and gas wells, and the unitization or pooling of oil and gas properties.
See the “Risk Factors” described in Item 1A of this report for further discussion of governmental regulation and ongoing regulatory changes, including with respect to environmental matters. 15 Table of Contents Index to Financial Statements Our operations are also subject to conservation regulations, including the regulation of the size of drilling and spacing units or proration units, the number of wells that may be drilled in a unit, the rate of production allowable from oil and gas wells, and the unitization or pooling of oil and gas properties.
We have approximately 73,000 net reservoir acres (comprised of approximately 43,000 in the Woodford formation and approximately 30,000 in the Springer formation) located primarily in Garvin, Grady and Stephens Counties.
The SCOOP play mainly targets the Devonian to Mississippian aged Woodford, Sycamore and Springer formations. We have approximately 74,000 net reservoir acres (comprised of approximately 44,000 in the Woodford formation and approximately 30,000 in the Springer formation) located primarily in Garvin, Grady and Stephens Counties.
He holds a degree in Mineral Land Management from the University of Evansville. Mr. Zitkus is a member of the American Association of Professional Landmen and Past Regional Director of the Independent Petroleum Association of America. There is no family relationship between any of our officers or between any of them and the Company's Board of Directors.
Zitkus is a member of the American Association of Professional Landmen and Past Regional Director of the Independent Petroleum Association of America. There are no family relationships among our executive officers or between any executive officer and any member of the Board of Directors.
Commodity prices experienced volatility throughout 2024 and the 12-month average price for natural gas decreased from $2.64 per MMBtu for 2023 to $2.13 per MMBtu for 2024, the 12-month average price for NGL decreased from $31.42 per barrel for 2023 to $31.30 per barrel for 2024, and the 12-month average price for crude oil decreased from $78.21 per barrel for 2023 to $76.32 per barrel for 2024.
Commodity prices experienced volatility throughout 2025 and the 12-month unweighted average of the first-day-of-the-month price for natural gas increased from $2.13 per MMBtu for 2024 to $3.39 per MMBtu for 2025, the 12-month average WTI spot price for crude oil decreased from $76.32 per barrel for 2024 to $66.01 per barrel for 2025, and the calculated average weighted price for NGL over the remaining lives of the properties decreased from $31.30 per barrel for 2024 to $30.17 per barrel for 2025.
We expect this drilling program to result in approximately 1,040 to 1,065 MMcfe per day of production in 2025. 4 Table of Contents Index to Financial Statements Additionally, in 2025, we expect a continuation of shareholder return actions through our Repurchase Program.
We expect this development program to result in approximately 1.030 to 1.055 Bcfe per day of production in 2026. 4 Table of Contents Index to Financial Statements Additionally, in 2026, we expect to continue returning capital to shareholders through our Repurchase Program.
Our strategy is to develop our assets in a safe, environmentally responsible manner, while generating sustainable cash flow, improving margins and operating efficiencies and returning capital to shareholders. To accomplish these goals, we generally allocate capital to projects we believe offer the highest rate of return and we deploy leading drilling and completion techniques and technologies in our development efforts.
To achieve these goals, we generally allocate capital to projects we believe offer the highest rate of return and we deploy leading drilling and completion techniques and technologies in our development efforts.
These circumstances may include changes in commodity price outlook and costs, delays in the availability of infrastructure, well permitting delays and new data from recently completed wells. 8 Table of Contents Index to Financial Statements The following table summarizes the changes in our estimated proved undeveloped reserves during 2024 (in Bcfe): Proved Undeveloped Reserves, December 31, 2023 2,011 Sales of oil and natural gas reserves in place — Extensions and discoveries 547 Conversion to proved developed reserves (341) Revisions of prior reserve estimates (357) Proved Undeveloped Reserves, December 31, 2024 1,861 Total may not sum due to rounding.
The following table summarizes the changes in our estimated proved undeveloped reserves during 2025 (in Bcfe): Proved Undeveloped Reserves, December 31, 2024 1,861 Sales of oil and natural gas reserves in place — Extensions and discoveries 582 Conversion to proved developed reserves (417) Revisions of prior reserve estimates (177) Proved Undeveloped Reserves, December 31, 2025 1,848 Total may not sum due to rounding.
We experienced total downward revisions of 357 Bcfe in estimated proved undeveloped reserves. This included 300 Bcfe of downward revisions associated with commodity price changes.
We experienced total downward revisions of 177 Bcfe in estimated proved undeveloped reserves. This included 182 Bcfe and 84 Bcfe of downward revisions associated with changes in our development schedule changes and PUD well design changes, respectively.
We have identified approximately 20,500 net reservoir acres of our existing leasehold for Marcellus development and have 22 PUD Marcellus locations within our Utica operating area. In 2023 we drilled, completed, and turned to sales two Marcellus wells and have plans to drill eight Marcellus wells and complete and turn to sales four Marcellus wells in 2025.
We have identified approximately 35,000 net reservoir acres of our existing leasehold for Marcellus development and have 25 PUD Marcellus locations. In 2025 we drilled, completed, and turned to sales our first four well development pad in the Marcellus. Our Marcellus development area is approximately 3,500 to 4,500 feet shallower than the Utica.
These consisted of upward revisions of 16 Bcfe as a result of positive well performance and 171 Bcfe due to an increase in working interest and net revenue interest as a result of our successful leasing efforts through 2024. These were offset by downward revisions of 488 Bcfe which were associated with commodity price changes.
Additionally, there were upward revisions of 161 Bcfe due to an increase in working interest and net revenue interest as a result of our successful leasing efforts throughout 2025. These were offset by downward revisions of 185 Bcfe and 129 Bcfe as a result of development schedule changes and PUD well design changes, respectively.
Zitkus served as an independent consultant from October 2013 to March 2014 and as Vice President of Land for Chesapeake Energy Corporation from May 2007 to October 2013. During his 20-year tenure with Equitable Resources Inc. (now EQT Corp.), he held various positions, including Vice President of Operations and Senior Vice President of Land, between 1987 and 2007.
During his 20-year tenure with Equitable Resources Inc. (now EQT Corp.), he held various positions, including Vice President of Operations and Senior Vice President of Land, between 1987 and 2007. He holds a degree in Mineral Land Management from the University of Evansville. Mr.
In the course of its audit, NSAI conducted a detailed review of properties making up approximately 85% of the total proved reserves and accounting for approximately 95% of the present worth of those reserves.
NSAI is an independent petroleum engineering firm and was selected for their historical experience and geographic expertise in engineering similar resources. In the course of its audit, NSAI conducted a detailed review of properties making u p approximately 86% of the total proved reserves and accounting for approximately 88% of the present worth of those reserves.
Gulfport's Predecessor was incorporated in the State of Delaware in July 1997. Our corporate headquarters are located in Oklahoma City, Oklahoma and shares of Gulfport's common stock trade on the New York Stock Exchange (NYSE) under the ticker symbol “GPOR”.
Our corporate headquarters are located in Oklahoma City, Oklahoma and shares of Gulfport's common stock trade on the New York Stock Exchange (“NYSE”) under the ticker symbol “GPOR”. Our corporate strategy is focused on the economic development of our asset base in an effort to generate sustainable free cash flow.
For the low price scenario 128 PUDs were PV-10 economic. 9 Table of Contents Index to Financial Statements Acreage The following table presents our total gross and net developed and undeveloped acres as of December 31, 2024: Developed Acreage Undeveloped Acreage Field Gross Net Gross Net Utica & Marcellus 161,391 133,638 77,387 74,359 SCOOP 49,922 35,896 9,829 7,134 Total 211,313 169,534 87,216 81,493 Of our leases that are not held by production, most have a five-year primary term, many of which include options to extend the primary term.
For the low price scenario 132 PUDs were PV-10 economic. 9 Table of Contents Index to Financial Statements Acreage The following table presents our total gross and net developed and undeveloped acres as of December 31, 2025: Developed Acreage Undeveloped Acreage Field Gross Net Gross Net Utica & Marcellus 170,209 142,239 83,069 80,294 SCOOP 50,735 36,174 10,689 7,680 Total 220,944 178,413 93,758 87,974 Of our leases that are not held by production or held by other applicable lease provisions, most have a five-year primary term, and many include an optional right to extend the primary term for an additional three or five years.
The Chapter 11 Cases were administered jointly under the caption In re Gulfport Energy Corporation, et al., Case No. 20-35562 (DRJ). The Bankruptcy Court confirmed the Plan and entered the confirmation order on April 28, 2021, and the Debtors emerged from the Chapter 11 Cases on the Emergence Date.
The Bankruptcy Court confirmed the Plan and entered the confirmation order on April 28, 2021, and the Debtors emerged from the Chapter 11 Cases on the Emergence Date. On May 18, 2021, we began trading on the NYSE under the symbol “GPOR”.
Our PUDs will be converted from undeveloped to developed as the applicable wells commence production or when there are no material incremental completion capital expenditures associated with such proved developed reserves.
Our PUDs will be converted from undeveloped to developed as the applicable wells commence production or when there are no material incremental completion capital expenditures associated with such proved developed reserves. 8 Table of Contents Index to Financial Statements We record PUD locations only after a development plan has been approved by our senior management and Board of Directors to complete the associated development drilling within five years from the time of initial booking.
Our Marcellus development area is approximately 3,500 to 4,500 feet shallower than the Utica. During 2024, we produced approximately 842 MMcfe per day net to our interests in Utica/Marcellus and it accounted for approximately 80% of our total production.
During 2025, we produced approximately 841 MMcfe per day net to our interests in Utica/Marcellus and it accounted for approximately 81% of our total production. SCOOP - The SCOOP is a defined area that encompasses many of the top hydrocarbon producing counties in Oklahoma within the Anadarko Basin.
In addition, our geoscience staff has approximately 51 years combined industry experience and our reservoir staff has approximately 61 years combined experience. 5 Table of Contents Index to Financial Statements During 2024, our total net natural gas, NGLs and oil proved reserves estimates attributable to the Company's interests were prepared by our engineers and Netherland, Sewell & Associates, Inc.
During 2025, our total net natural gas, NGLs and oil proved reserves estimates attributable to the Company's interests were prepared by the Company and Netherland, Sewell & Associates, Inc. (“NSAI”) conducted an audit of the proved reserves as of December 31, 2025.
Sluiter is a graduate of the University of Sydney, Australia, with a Bachelor of Science degree in Chemical Engineering. Lester Zitkus, Senior Vice President of Land Mr. Zitkus, 59, has served as Senior Vice President of Land since January 2017 and joined the Company as Vice President of Land in March 2014. Prior to joining the Company, Mr.
Zitkus, 60, has served as Senior Vice President of Land since January 2017 and joined the Company as Vice President of Land in March 2014. Prior to joining the Company, Mr. Zitkus served as an independent consultant from October 2013 to March 2014 and as Vice President of Land for Chesapeake Energy Corporation from May 2007 to October 2013.
The development schedule changes reflect our ongoing commitment to optimizing the long-term plan to best develop our asset and maximize cash flow, and overall economic returns. These locations excluded from our SEC reserves report remain in Gulfport's development plan.
Design changes primarily include well spacing and lateral length updates with a portion of these volumes now to be developed with locations outside of the SEC designated five-year development time frame. These development schedule and design changes reflect our ongoing commitment to optimizing the long-term plan to best develop our assets and maximize cash flow and overall economic returns.
On May 18, 2021, we began trading on the NYSE under the symbol “ GPOR ” . Business Strategy Gulfport aims to create sustainable value through the economic development of our significant resource plays in the Utica/Marcellus and SCOOP operating areas.
Business Strategy Gulfport aims to create sustainable value through the economic development of our significant resource plays in the Utica/Marcellus and SCOOP operating areas. Our strategy is to develop our assets in a safe, environmentally responsible manner, while generating sustainable cash flow, enhancing margins and operating efficiencies and returning capital to shareholders.
We added 46 PUD locations in the Utica/Marcellus which included 33 Utica locations for 341 Bcfe and 13 Marcellus locations for 92 Bcfe. In the SCOOP, we added 16 PUD locations for 114 Bcfe. Revisions of prior reserve estimates.
We added 35 PUD locations in the Utica/Marcellus which included 28 Utica locations for 382 Bcfe and 7 Marcellus locations for 62 Bcfe. We also added 11 operated locations in the Utica to PDP which were not previously booked for 119 Bcfe. In the SCOOP, we added 6 PUD locations for 138 Bcfe. Revisions of prior reserve estimates.
Additionally, downward revisions of 172 Bcfe were associated with changes in our development schedule. The schedule changes moved the development of 11 Utica/Marcellus PUD locations and 6 SCOOP PUD locations beyond the SEC requirement of developing PUDs five years from initial booking.
The schedule changes moved the development of 9 Utica PUD locations and 4 SCOOP PUD locations beyond the SEC requirement of development within five years from initial booking and while these locations are excluded from our SEC reserves report, they remain in our longer-term development plan.
December 31, 2024 Oil (MMBbl) Natural Gas (Bcf) NGL (MMBbl) Total (Bcfe) Utica & Marcellus Proved developed (1) 4 1,427 8 1,498 Proved undeveloped (1) 13 1,189 36 1,480 Total proved (1) 17 2,616 44 2,978 SCOOP Proved developed 4 451 23 611 Proved undeveloped 2 289 13 380 Total proved 5 740 36 991 Total Proved developed 7 1,879 31 2,109 Proved undeveloped 15 1,478 49 1,861 Total proved 22 3,356 80 3,969 Totals may not sum or recalculate due to rounding. _____________________ (1) Includes approximately 12 Bcfe and 174 Bcfe of net developed and undeveloped reserves, respectively, located in the Marcellus target formation.
December 31, 2025 Oil (MMBbl) Natural Gas (Bcf) NGL (MMBbl) Total (Bcfe) Utica & Marcellus Proved developed (1) 4 1,717 12 1,818 Proved undeveloped (1) 14 1,189 39 1,510 Total proved (1) 19 2,906 52 3,328 SCOOP Proved developed 4 440 21 587 Proved undeveloped 2 266 10 338 Total proved 5 707 31 925 Total Proved developed 8 2,157 33 2,404 Proved undeveloped 16 1,455 50 1,848 Total proved 24 3,612 83 4,253 Totals may not sum or recalculate due to rounding. _____________________ (1) Includes approximately 26 Bcfe and 210 Bcfe of net developed and undeveloped reserves, respectively, located in the Marcellus target formation.
The following table sets forth the potential expiration periods of gross and net undeveloped leasehold acres as of December 31, 2024: Undeveloped Acres Years Ending December 31, Gross Acres Net Acres 2025 2,203 2,195 2026 3,682 3,661 2027 2,812 2,775 After 2027 18,673 18,667 Held by production 59,846 54,195 Total 87,216 81,493 Productive Wells The following table presents our total gross and net productive wells, expressed separately for oil and gas, as of December 31, 2024: NRI/WI Productive Oil Wells Productive Gas Wells Total Wells Field Percentages Gross Net Gross Net Gross Net Utica & Marcellus 49.66/60.84 15 5.15 712 437.2 727 442.4 SCOOP 21.41/26.49 119 12.23 531 159.92 650 172.1 Total (1) 143 17.4 1,411 597.1 1,554 614.5 _____________________ (1) We also have override/royalty interests in 177 wells with an average NRI of 0.6%, which are not material to our operations.
The following table sets forth the potential expiration periods of gross and net undeveloped leasehold acres as of December 31, 2025: Undeveloped Acres Gross Acres Net Acres 2026 2,827 2,806 2027 1,672 1,636 2028 10,048 10,042 After 2028 19,930 19,930 Held by production 59,281 53,560 Total 93,758 87,974 Productive Wells The following table presents our total gross and net productive wells, expressed separately for oil and gas, as of December 31, 2025: NRI/WI Productive Oil Wells Productive Gas Wells Total Wells Field Percentages Gross Net Gross Net Gross Net Utica & Marcellus 50.25/61.58 69 25.5 697 446.2 766 471.7 SCOOP 20.86/25.82 129 13.3 518 153.8 647 167.1 Total (1) 215 38.8 1,380 600.0 1,595 638.8 _____________________ (1) We also have override/royalty interests in 182 wells with an average NRI of 0.6%, which are not material to our operations.
Internal Controls Over Proved Reserve Estimates Our proved reserve estimates are prepared in accordance with our internal control procedures.
Reserve estimates for the year ended 2024 were prepared by the Company and audited by NSAI as of December 31, 2024. Reserve estimates for the year ended 2023 were prepared by NSAI for 100% of our operating areas. Internal Controls Over Proved Reserve Estimates Our proved reserve estimates are prepared in accordance with our internal control procedures.
The development schedule changes reflect our ongoing commitment to optimizing the long-term plan to best develop our asset and maximize cash flow and overall economic returns. These locations excluded from our SEC reserves report remain in Gulfport's development plan. Finally, upward revisions of 67 Bcfe were a result of a combination of various economic assumption updates.
Design changes primarily include well spacing and lateral length updates with a portion of these volumes now to be developed with locations outside of the SEC designated five-year development time frame. These development schedule and design changes reflect our ongoing commitment to optimizing the long-term plan to best develop our assets and maximize cash flow and overall economic returns.
Sluiter, 52, joined Gulfport as the Senior Vice President of Reservoir Engineering in December 2018 from Noble Energy, Inc., where he most recently served as the Permian Basin Business Unit Manager.
Sluiter, 53, joined Gulfport in December 2018 from Noble Energy, Inc., where he held various engineering and leadership positions from March 2007 to November 2018, including Permian Basin Business Unit Manager, Appalachian Reservoir Engineering Supervisor, and Business Development Engineering Advisor. Prior to joining Noble Energy, Mr.
Our corporate strategy is focused on the economic development of our asset base in an effort to generate sustainable free cash flow. As of December 31, 2024, we had 4.0 Tcfe of proved reserves with a Standardized Measure of $1.75 billion and a PV-10 of $1.76 billion.
As of December 31, 2025, we had 4.3 Tcfe of proved reserves with a Standardized Measure of $3.4 billion and a PV-10 of $3.6 billion.
Additionally, downward revisions of 172 Bcfe were primarily a result of development schedule changes with some PUD well design changes. The schedule changes moved the development of 11 Utica/Marcellus PUD locations and 6 SCOOP PUD locations beyond the SEC requirement of developing these wells five years from initial booking.
The schedule changes moved the development of 9 Utica PUD locations and 4 SCOOP PUD locations beyond the SEC requirement of development within five years from initial booking and while these locations are excluded from our SEC reserves report, they remain in our longer-term development plan.