Exhibit 99.4

UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL INFORMATION

The following unaudited pro forma condensed combined financial statements give effect to the business combination of Range Resources Corporation, a Delaware corporation (“Range”), and Memorial Resource Development Corp., a Delaware corporation (“Memorial”). That business combination was effected by the consummation of the transactions contemplated by the merger agreement, dated as of May 15, 2016 (the “merger agreement”), entered into by and among Range, Memorial, and Medina Merger Sub, Inc., a Delaware corporation (“Merger Sub”), contemplating the merger of Merger Sub with and into Memorial (the “merger”). The merger will be accounted for using the acquisition method of accounting with Range identified as the acquirer. Under the acquisition method of accounting, Range will record all assets acquired and liabilities assumed at their respective acquisition date fair values at the effective time of the merger.

The following unaudited pro forma condensed combined financial information is based on the historical consolidated financial statements of Range and Memorial, adjusted to reflect the acquisition of Memorial by Range and the related financing transactions. Range’s historical consolidated financial statements have also been adjusted to give effect to the disposal in December 2015 of its Virginia/West Virginia natural gas assets as presented in Note 4 to the unaudited pro forma combined financial information as if it had occurred on January 1, 2015.

The unaudited pro forma combined balance sheet gives effect to the merger and the related financing transactions, as if they had occurred on June 30, 2016. The unaudited pro forma combined statements of operations combine the results of operations of Range and Memorial for the year ended December 31, 2015 and the six months ended June 30, 2016. The unaudited pro forma combined statements of operations give effect to the following events as if they had occurred on January 1, 2015. The unaudited pro forma combined financial statements reflect the following merger-related pro forma adjustments, based on available information and certain assumptions Range believes are reasonable:

The unaudited pro forma condensed combined financial statements are provided for illustrative purposes only and are not intended to represent or be indicative of the results of operations or financial position of the combined company that would have been recorded had the merger been completed as of the dates presented and should not be taken as representative of future results of operations or financial position of the combined company. The unaudited pro forma condensed combined financial statements do not reflect the impacts of any potential operational efficiencies, asset dispositions, cost savings or economies of scale that the combined company may achieve with respect to the combined operations. The incentive unit compensation included in Memorial’s historical statements of operations consists of incentive units issued by MRD Holdco LLC. Because MRD Holdco LLC will not own any equity interest in Memorial following the consummation of the merger, all costs related to these incentive units will be discontinued. Additionally, the pro forma statements of operations do not include non-recurring charges or credits and the related tax effects which result directly from the merger.

The unaudited pro forma condensed combined financial statements should be read in conjunction with the historical consolidated financial statements and accompanying notes contained in Range’s and Memorial’s Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, and Memorial’s Current Report on Form 8-K filed on July 28, 2016, which are incorporated herein by reference.

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Unaudited Pro Forma Condensed Combined

Balance Sheet as of June 30, 2016

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Unaudited Pro Forma Condensed Combined

Statement of Operations for the Six Months Ended June 30, 2016

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Unaudited Pro Forma Condensed Combined

Statement of Operations for the Year Ended December 31, 2015

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NOTES TO UNAUDITED PRO FORMA COMBINED FINANCIAL INFORMATION

Note 1 — Basis of Presentations

On May 15, 2016, Range, Merger Sub, and Memorial entered into the merger agreement contemplating the merger. The merger closed on September 16, 2016. As a result, Memorial became a wholly owned subsidiary of Range at the effective time of the merger. Under the merger agreement, Memorial stockholders received 0.375 of a share of Range common stock for each share of Memorial common stock that they held immediately prior to the effective time of the merger.

The unaudited pro forma combined financial information has been derived from the historical consolidated financial statements of Range and Memorial. Certain of Memorial’s historical amounts have been reclassified to conform to Range’s financial statement presentation. The unaudited pro forma condensed combined balance sheets as of June 30, 2016 give effect to the merger and the related financing transactions as if they had occurred on June 30, 2016. The unaudited pro forma combined statements of operations for the six months ended June 30, 2016 and the year ended December 31, 2015 give effect to the merger and the related financing transactions as if they had occurred on January 1, 2015.

The unaudited pro forma condensed combined financial statements reflect pro forma adjustments that are described in the accompanying notes and are based on available and certain assumptions that Range believes are reasonable. However, actual results may differ from those reflected in these statements. In Range’s opinion, all adjustments that are necessary to present fairly the pro forma information have been made. The following unaudited pro forma combined statements do not purport to represent what the financial position or results of operations would have been if the transaction had actually occurred on the dates indicated above, nor are they indicative of Range’s future financial position or results of operations. These unaudited pro forma combined financial statements should be read in conjunction with the historical consolidated financial statements and related notes of Range and Memorial for the periods presented.

Note 2 — Unaudited Pro Forma Condensed Combined Balance Sheet

The merger will be accounted for using the acquisition method of accounting for business combinations. The allocation of the preliminary estimated purchase price is based upon management’s estimates of and assumptions related to the fair value of assets to be acquired and liabilities to be assumed as of June 30, 2016, using currently available information. Because the unaudited pro forma combined financial information has been prepared based on these preliminary estimates, the final purchase price allocation and the resulting effect on financial position and results of operations may differ significantly from the pro forma amounts included in this Exhibit. Range expects to finalize its allocation of the purchase consideration as soon as practicable.

The preliminary purchase price allocation is subject to change as a result of several factors, including but not limited to:

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The preliminary merger consideration to be transferred, fair value of assets acquired and liabilities assumed and resulting goodwill were calculated as follows (in thousands):

Pursuant to the merger agreement, Range issued 0.375 of a share of Range common stock for each share of Memorial common stock outstanding at the effective time of the merger, including Memorial’s outstanding restricted stock, which resulted in the issuance by Range of approximately $3.0 billion of shares of Range common stock (based on the closing price as of September 15, 2016). Goodwill recognized is attributable to the asset recorded to offset net deferred tax liabilities arising from differences between the purchase price allocated to Memorial’s assets and liabilities based on fair value and the tax basis of these assets and liabilities. In addition, the total consideration for the merger included a control premium, which resulted in a higher value compared to the fair value of the net assets acquired. The goodwill is also attributable to Range’s qualitative assumptions of long-term factors that the merger creates for Range stockholders including additional potential for exploration and development opportunities, additional scale and efficiencies in other basins in which Range currently operates and substantial operating and administrative synergies. Because the merger is intended to be treated for U.S. federal income tax purposes as a “reorganization” within the meaning of Section 368(a) of the Code, Memorial’s tax basis in its assets and liabilities will carry over to Range.

From May 13, 2016, the last trading date prior to the transaction’s initial announcement, to September 15, 2016, the preliminary value of Range’s purchase consideration to be transferred had decreased by approximately $207 million, as a result of the decrease in the share price for Range common stock from $42.01 to $39.37.

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The following adjustments have been made to the accompanying unaudited pro forma combined balance sheet as of June 30, 2016:

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Note 3 — Unaudited Pro forma Condensed Combined Statements of Operations

Adjustments (a) – (j) to the Statement of Operations for the six months ended June 30, 2016 and the year ended December 31, 2015 include reclassifications required to conform Memorial’s revenue and expense items to Range’s presentation as follows:

Adjustments (k)-(p) to the Statements of Operations for the six months ended June 30, 2016 and the year ended December 31, 2015 include the following pro forma adjustments to reflect the merger:

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Note 4 — Range’s Unaudited Pro forma Condensed Consolidated Statements of Operations

Range’s unaudited pro forma condensed consolidated statement of operations for the year ended December 31, 2015 included in the unaudited pro forma condensed combined statement of operations gives effect to the sale in December 2015 of Range’s producing properties and gathering assets in Virginia and West Virginia for cash proceeds of $876.0 million, before closing adjustments. Range’s unaudited pro forma condensed consolidated statement of operations gives effect of that sale as if it occurred in January 1, 2015:

Unaudited Pro Forma Condensed Consolidated

Statement of Operations for the Year Ended December 31, 2015

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Note 5 — Supplemental Pro Forma Natural Gas, NGLs and Crude Oil Reserves Information

The following tables present the estimated pro forma combined net proved developed and undeveloped, natural gas, NGLs and crude oil reserves as of December 31, 2015, along with a summary of changes in quantities of net remaining proved reserves during the year ended December 31, 2015. The pro forma reserve information set forth below gives effect to the merger as if the transaction had occurred on January 1, 2015. The Range pro forma reserve information excludes the 2015 sale of the Virginia and West Virginia properties.

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The pro forma standardized measure of discounted future net cash flows relating to proved natural gas, NGLs and crude oil reserves as of December 31, 2015 is as follows (in thousands):