EVERFLOW EASTERN PARTNERS LP

Natural Gas and Crude Oil Reserves. Proved reserves are the estimated quantities of crude oil and natural gas, which, by an analysis of geological and engineering data, can be estimated with reasonable certainty to be recoverable in future years from known reservoirs under existing economic conditions, operating methods and government regulations. Prices include consideration of changes in existing prices provided only by contractual arrangements, but not on escalations based upon future conditions. The estimated reserves include reserves attributable to the Company’s direct ownership interests in crude oil and natural gas properties as well as the reserves attributable to the Company’s percentage interests in crude oil and natural gas properties owned through joint ventures. All of the reserves are generally located in the Appalachian Basin region of Ohio and Pennsylvania. The Company bases its estimates of proved reserves on the 12-month un-weighted average price of the first-day-of-the-month price for each calendar month of the year preceding the evaluation date. The Company then applies any basis adjustments specifically applicable to each oil and gas property based on location and pricing details. The natural gas prices used in the estimation of proved reserves were $2.68 and $1.76 per MCF at December 31, 2025 and 2024 respectively, and the crude oil prices used in the estimation of proved reserves were $61.97 and $72.11 per BBL at December 31, 2025 and 2024, respectively.

Reserve estimates are imprecise and may change as additional information becomes available. Furthermore, estimates of natural gas and crude oil reserves are projections based on engineering data. There are uncertainties inherent in the interpretation of this data as well as the projection of future rates of production and the timing of development expenditures. Reservoir engineering is a subjective process of estimating underground accumulations of natural gas and crude oil that cannot be measured in an exact way and the accuracy of any reserve estimate is a function of the quality of available data and of engineering and geological interpretation and judgment.

The preparation of the Company’s natural gas and crude oil reserve estimates was completed in accordance with the Company’s prescribed internal control procedures, which include verification of input data delivered to the Company’s third-party reserve specialist, as well as a multi-functional management review. For the year ended December 31, 2025, the Company retained Wright & Company, Inc. (“Wright & Company”), a third-party, independent petroleum engineering firm, to prepare a report of proved reserves. The reserves report included a detailed review of all of the Company’s crude oil and natural gas properties. Wright & Company’s evaluation was based on more than 35 years of experience in the estimation of and evaluation of petroleum reserves, specified economic parameters, operating conditions, and government regulations applicable as of December 31, 2025. The Wright & Company report, including the qualifications of the chief technical person responsible for the report, was prepared in accordance with generally accepted petroleum engineering and evaluation principles and is attached as Exhibit 99.1 to this Annual Report on Form 10-K.

Reserves Reported to Other Agencies. There were no estimates of total, proved net oil or gas reserves filed with or included in reports to any other federal authority or agency during 2025 or 2024.

Proved Reserves.(1) The following table reflects the estimates of the Company’s proved reserves which are based on the Company’s reserves report as of December 31, 2025.

Oil (BBLS) · Gas (MCF)

Proved Developed · 253,000 · 11,067,000

Proved Undeveloped · - · -

Total · 253,000 · 11,067,000

(1) · The Company has not determined proved reserves associated with its proved and other undeveloped properties, including its deep property interests, at December 31, 2025. A reconciliation of the Company’s proved reserves is included in the Notes to the Consolidated Financial Statements.

Production. The following table summarizes the net crude oil and natural gas production, average sales prices and average production (lifting) costs per equivalent unit of production for 2025 and 2024.

Average

Production · Sales Price · Average Lifting Cost

Oil (BBLS) · Gas (MCF) · per BBL · per MCF · per Equivalent MCF(1)

2025 · 30,000 · 1,434,000 · 61.57 · 3.28 · 1.56

2024 · 31,000 · 1,077,000 · 72.37 · 2.15 · 1.82

(1) · Oil production is converted to MCF equivalents at the rate of 6 MCF per BBL.

Productive Wells. The following table sets forth the gross and net oil and gas wells of the Company as of December 31, 2025.

Gross Wells · Net Wells

(1) · (1) · (1) · (1)

Oil · Gas · Total · Oil · Gas · Total

247 · 816 · 1,063 · 136 · 539 · 675

(1) · Oil wells are those wells which generated the majority of their revenues from crude oil production during 2025; gas wells are those wells which generated the majority of their revenues from natural gas production during 2025.