Exhibit 99.1

ALLIANCE HOLDINGS GP, L.P.

Reports Record Quarterly Financial Results and Increases Quarterly Distribution by 2.4% to $0.8475 Per Unit

TULSA, OKLAHOMA, April 28, 2014 — Alliance Holdings GP, L.P. (NASDAQ: AHGP) today reported record quarterly financial results for the quarter ended March 31, 2014 (the “2014 Quarter”).  On the strength of record results by its operating subsidiary, Alliance Resource Partners, L.P. (NASDAQ: ARLP), AHGP’s net income rose 12.4% to a record $67.4 million, or net income per basic and diluted limited partner interest of $1.13 per unit, an increase of 13.0% compared to quarter ended March 31, 2013 (the “2013 Quarter”).  (Operating results for AHGP reflect those of the operating subsidiaries of ARLP and, as a result, AHGP reports its financial results on a consolidated basis with the financial results of ARLP.  For a discussion of net income presentation, please see the end of this release.)

AHGP also announced that the Board of Directors of its general partner (the “Board”) increased the cash distribution to unitholders for the 2014 Quarter to $0.8475 per unit, or an annualized rate of $3.39 per unit, payable on May 20, 2014 to AHGP’s unitholders of record as of the close of trading on May 13, 2014.  The declared quarterly cash distribution represents an 11.1% increase over the cash distribution of $0.7625 per unit for the 2013 Quarter and an increase of 2.4% over the fourth quarter 2013 distribution of $0.8275 per unit.

“AHGP continues to benefit from the strong operating and financial performance of ARLP,” said Joseph W. Craft III, President and Chief Executive Officer.  “With ARLP poised to deliver another year of record results, our leverage to growth at ARLP is expected to benefit AHGP as well.   Reflecting this expectation, the Board elected to increase quarterly unitholder distributions for the twenty-fourth consecutive quarter.”

AHGP’s principal sources of cash flow are its ownership of general partner interests, limited partner interests and incentive distribution rights in ARLP.  The declared distribution is based on the distribution AHGP will receive from its ownership interests in ARLP, which today announced a quarterly distribution for the 2014 Quarter of $1.2225 per unit, or $4.89 per unit on an annualized basis, payable on May 15, 2014 to all unitholders of record as of the close of trading on May 8, 2014.  (See ARLP Press Release dated April 28, 2014.)

Based on ARLP’s current declared distribution, AHGP expects to receive quarterly cash distributions from ARLP of $51.6 million, or $206.4 million on an annualized basis. AHGP’s primary cash requirements are for working capital, distributions to its unitholders and general and

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administrative expenses, including for 2014 an estimated $4.6 million in general and administrative expenses.

AHGP and ARLP will discuss their 2014 Quarter financial results during a joint conference call scheduled for today at 10:00 a.m. Eastern.  To participate in the conference call, dial (866) 515-2908 and provide pass code 49236626.  International callers should dial (617) 399-5122 and provide the same pass code.  Investors may also listen to the call via the “investor information” section of ARLP’s website at http://www.arlp.com or AHGP’s website at http://www.ahgp.com.

An audio replay of the conference call will be available for approximately one week.  To access the audio replay, dial (888) 286-8010 and provide pass code 47869959.  International callers should dial (617) 801-6888 and provide the same pass code.

This announcement is intended to be a qualified notice under Treasury Regulation Section 1.1446-4(b), with 100% of the partnership’s distributions to foreign investors attributable to income that is effectively connected with a United States trade or business.  Accordingly, AHGP’s distributions to foreign investors are subject to federal income tax withholding at the highest applicable tax rate.

About Alliance Holdings GP, L.P.

AHGP is a limited partnership formed to own and control Alliance Resource Management GP, LLC, the managing general partner of Alliance Resource Partners, L.P. (NASDAQ: ARLP), through which it holds a 1.98% general partner interest and the incentive distribution rights in ARLP.  In addition, AHGP owns 15,544,169 common units of ARLP.  The Board of Directors of ARLP announced today that it approved a two-for-one split of ARLP’s common units.  The unit split will take place in the form of a one unit distribution on each ARLP unit outstanding, with units to be distributed on June 16, 2014 to unitholders of record as of May 30, 2014.  Following the unit split, AHGP will continue to own a 1.98% general partner interest and the incentive distribution rights in ARLP.  In addition, AHGP will receive an additional 15,544,169 ARLP common units, which will bring its total ownership to 31,088,338 ARLP common units.  The quarterly cash distribution per ARLP unit will be reduced by half and as a result, ARLP’s total distribution to AHGP will remain unchanged after the ARLP unit split is consummated.

News, unit prices and additional information about AHGP including filings with the Securities and Exchange Commission, are available at http://www.ahgp.com.  For more information, contact the investor relations department of AHGP at (918) 295-1415 or via e-mail at investorrelations@ahgp.com.

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The statements and projections used throughout this release are based on current expectations.  These statements and projections are forward-looking, and actual results may differ materially.  These projections do not include the potential impact of any mergers, acquisitions or other business combinations that may occur after the date of this release.  At the end of this release, we have included more information regarding business risks that could affect our results.

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FORWARD-LOOKING STATEMENTS:  With the exception of historical matters, any matters discussed in this press release are forward-looking statements that involve risks and uncertainties that could cause actual results to differ materially from projected results.  These risks, uncertainties and contingencies include, but are not limited to, the following: changes in competition in coal markets and the ARLP Partnership’s ability to respond to such changes; changes in coal prices, which could affect the ARLP Partnership’s operating results and cash flows; risks associated with the ARLP Partnership’s expansion of its operations and properties; legislation, regulations, and court decisions and interpretations thereof, including those relating to the environment, mining, miner health and safety and health care; deregulation of the electric utility industry or the effects of any adverse change in the coal industry, electric utility industry, or general economic conditions; dependence on significant customer contracts, including renewing customer contracts upon expiration of existing contracts; changing global economic conditions or in industries in which the ARLP Partnership’s customers operate; liquidity constraints, including those resulting from any future unavailability of financing; customer bankruptcies, cancellations or breaches to existing contracts, or other failures to perform; customer delays, failure to take coal under contracts or defaults in making payments; adjustments made in price, volume or terms to existing coal supply agreements; fluctuations in coal demand, prices and availability; the ARLP Partnership’s productivity levels and margins earned on its coal sales; changes in raw material costs; changes in the availability of skilled labor; the ARLP Partnership’s ability to maintain satisfactory relations with its employees; increases in labor costs, adverse changes in work rules, or cash payments or projections associated with post-mine reclamation and workers’ compensation claims; increases in transportation costs and risk of transportation delays or interruptions; operational interruptions due to geologic, permitting, labor, weather-related or other factors; risks associated with major mine-related accidents, such as mine fires, or interruptions; results of litigation, including claims not yet asserted; difficulty maintaining the ARLP Partnership’s surety bonds for mine reclamation as well as workers’ compensation and black lung benefits; difficulty in making accurate assumptions and projections regarding pension, black lung benefits and other post-retirement benefit liabilities; the coal industry’s share of electricity generation, including as a result of environmental concerns related to coal mining and combustion and the cost and perceived benefits of other sources of electricity, such as natural gas, nuclear energy and renewable fuels; uncertainties in estimating and replacing the ARLP Partnership’s coal reserves; a loss or reduction of benefits from certain tax deductions and credits; difficulty obtaining commercial property insurance, and risks associated with the ARLP Partnership’s participation (excluding any applicable deductible) in the commercial insurance property program; and difficulty in making accurate assumptions and projections regarding future revenues and costs associated with equity investments in companies we do not control.

Additional information concerning these and other factors can be found in AHGP’s public periodic filings with the Securities and Exchange Commission (“SEC”), including AHGP’s Annual Report on Form 10-K for the year ended December 31, 2013, filed on February 28, 2014 with the SEC.  Except as required by applicable securities laws, AHGP does not intend to update its forward-looking statements.

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ALLIANCE HOLDINGS GP, L.P. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND OPERATING DATA

(In thousands, except unit and per unit data)

(Unaudited)

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ALLIANCE HOLDINGS GP, L.P. AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands, except unit data)

(Unaudited)

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ALLIANCE HOLDINGS GP, L.P. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)

(Unaudited)

Presentation of Net Income

Consolidated net income includes earnings attributable to both AHGP and noncontrolling interests.  Unless otherwise noted, any reference to net income in this release represents net income attributable to AHGP.

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