SUMMARY

This summary highlights information contained elsewhere in this joint proxy statement/prospectus and may not contain all the information that is important to you with respect to the merger and the other matters being considered at the Range and Memorial special meetings. Range and Memorial urge you to read the remainder of this joint proxy statement/prospectus carefully, including the attached Annexes, and the other documents to which we have referred you. See also the section titled “Where You Can Find More Information” beginning on page 187. We have included page references in this summary to direct you to a more complete description of the topics presented below.

The Companies

Range Resources Corporation

Range Resources Corporation, a Delaware corporation, is a Fort Worth, Texas-based independent natural gas, NGLs and oil company, engaged in the exploration, development and acquisition of natural gas and oil properties. Range’s activity is mostly focused in the Appalachian region of the United States. As of December 31, 2015, Range had estimated proved reserves of approximately 9,900 Bcfe, including 6,278 Bcf of natural gas, 549,135 Mbbls of NGLs and 53,193 Mbbls of oil. Range’s strategy is to commit to environmental protection and workplace and community safety, concentrate in core operating areas, maintain a multi-year drilling inventory, focus on cost efficiency, maintain a long-life reserve base and market its products to a large number of customers in different markets under a variety of commercial terms. As of March 31, 2016, Range had approximately $2.6 billion of debt. For the quarter ended March 31, 2016, Range’s average production was approximately 1,382 Mmcfed.

Range’s common stock is traded on the NYSE under the symbol “RRC.”

The principal executive offices of Range are located at 100 Throckmorton Street, Suite 1200, Fort Worth, Texas 76102, and Range’s telephone number is (817) 870-2601. Additional information about Range and its subsidiaries is included in documents incorporated by reference into this joint proxy statement/prospectus. See “Where You Can Find More Information” on page 187.

Memorial Resource Development Corp.

Memorial Resource Development Corp., a Delaware corporation, is a Houston, Texas-based independent natural gas and oil company engaged in the acquisition, exploration and development of natural gas and oil properties in North Louisiana. Substantially all of Memorial’s activity is in the Terryville Complex of North Louisiana, where it targets over-pressured, liquids-rich natural gas opportunities in multiple zones in the Cotton Valley Formation. Memorial’s primary objective is to build shareholder value through growth in reserves, production and cash flows by developing and expanding its significant portfolio of drilling locations. To achieve its objective, Memorial’s strategy is to maintain a disciplined, growth oriented financial strategy, grow production, reserves and cash flows through the development of its extensive drilling inventory, enhance returns through prudent capital allocation and continued improvements in operational and capital efficiencies, exploit additional development opportunities on current acreage, and make opportunistic acquisitions that meet its strategic and financial objectives.

As of December 31, 2015, Memorial had estimated proved reserves of approximately 1,378 Bcfe of natural gas equivalents. As of March 31, 2016, Memorial had approximately $1.1 billion of debt. For the quarter ended March 31, 2016, Memorial’s average production was approximately 420 Mmcfed. These estimated proved reserves, debt and average production for Memorial exclude amounts attributable to Memorial Production Partners LP (“MEMP”).

Memorial’s common stock is traded on the NASDAQ under the symbol “MRD.”

The principal executive offices of Memorial are located at 500 Dallas Street, Suite 1800, Houston, Texas 77002, and Memorial’s telephone number is (713) 588-8300. Additional information about Memorial and its subsidiaries is included in documents incorporated by reference into this joint proxy statement/prospectus. See “Where You Can Find More Information” on page 187.

Medina Merger Sub, Inc.

Medina Merger Sub, Inc., a wholly owned subsidiary of Range, is a Delaware corporation that was formed on May 13, 2016 for the sole purpose of effecting the merger. In the merger, Merger Sub will be merged with and into Memorial, with Memorial surviving as a wholly owned subsidiary of Range.

The Meetings

The Range Special Meeting (see page 41)

The special meeting of Range stockholders will be held at The Worthington Renaissance Hotel,              Room, 200 Main Street, Fort Worth, Texas 76102, on                      , 2016, at              , local time. The special meeting of Range stockholders is being held to consider and vote on:

Completion of the merger is conditioned on approval by Range stockholders of the issuance of Range common stock pursuant to the merger agreement.

Only record holders of shares of Range common stock at the close of business on                      , 2016, the record date for the Range special meeting, are entitled to notice of, and to vote at, the Range special meeting. At the close of business on the record date, the only outstanding voting securities of Range were common stock, and          shares of Range common stock were issued and outstanding, approximately          of which were owned and entitled to be voted by Range directors and executive officers. The Range directors and executive officers are currently expected to vote their shares in favor of each Range proposal listed above.

With respect to each Range proposal listed above, Range stockholders may cast one vote for each share of Range common stock that they own as of the Range record date. The proposal to approve the issuance of Range common stock requires the affirmative vote of a majority of the shares of Range common stock, present in person or represented by proxy at the Range special meeting and entitled to vote thereon. The proposal to approve the adjournment of the Range special meeting, if necessary or appropriate, to solicit additional proxies requires the affirmative vote of a majority of the shares of Range common stock, present in person or represented by proxy at the Range special meeting and entitled to vote on the proposal, regardless of whether there is a quorum.

No business may be transacted at the Range special meeting unless a quorum is present. If a quorum is not present at the special meeting, or if a quorum is present at the special meeting but there are not sufficient votes at the time of the special meeting to approve the proposal to issue shares of Range common stock in connection with the merger, then the chairman of the meeting has the power to adjourn the meeting, or, alternatively, Range stockholders may be asked to vote on a proposal to adjourn the Range special meeting in order to permit the

further solicitation of proxies. No notice of an adjourned meeting need be given unless the date, time and place of the resumption of the meeting are not announced at the adjourned meeting, the adjournment is for more than 30 days or, if after the adjournment, a new record date is fixed for the adjourned meeting, in which case a notice of the adjourned meeting shall be given to each stockholder of record entitled to vote at the meeting. Unless otherwise agreed to by Range and Memorial, the special meeting may not be adjourned or postponed to a date more than 20 business days after the date for which the meeting was previously scheduled and the special meeting may not be adjourned or postponed to a date on or after two business days before December 15, 2016.

Reasons for the Merger; Recommendation of the Range Board of Directors (see page 63)

After careful consideration, the Range board of directors determined that the merger and the other transactions contemplated by the merger agreement are advisable and in the best interests of Range and its stockholders, approved the merger and the merger agreement and recommended to the holders of Range common stock the approval of the issuance of Range common stock to Memorial stockholders in connection with the merger. For more information regarding the factors considered by the Range board of directors in reaching its decisions relating to its recommendations, see the section titled “The Merger—Range’s Reasons for the Merger; Recommendation of the Range board of directors.” The Range board of directors unanimously recommends that Range stockholders vote “FOR” the proposal to approve the issuance of Range common stock pursuant to the merger agreement and “FOR” the proposal to approve the adjournment of the Range special meeting to a later date or dates, if necessary or appropriate to solicit additional proxies in the event there are not sufficient votes at the time of the special meeting to approve the issuance of shares of Range common stock.

Opinion of Range’s Financial Advisor (see page 67)

On May 15, 2016, Credit Suisse Securities (USA) LLC (“Credit Suisse”) rendered its oral opinion to the Range board of directors (which was subsequently confirmed in writing by delivery of Credit Suisse’s written opinion addressed to the Range board of directors dated the same date) as to, as of May 15, 2016, the fairness, from a financial point of view, to Range of the exchange ratio in the merger pursuant to the merger agreement.

Credit Suisse’s opinion was directed to the Range board of directors (in its capacity as such), and only addressed the fairness, from a financial point of view, to Range of the exchange ratio in the merger pursuant to the merger agreement and did not address any other aspect or implication (financial or otherwise) of the merger. The summary of Credit Suisse’s opinion in this joint proxy statement/prospectus is qualified in its entirety by reference to the full text of its written opinion, which is included as Annex B to this joint proxy statement/prospectus and sets forth the procedures followed, assumptions made, qualifications and limitations on the review undertaken and other matters considered by Credit Suisse in preparing its opinion. However, neither Credit Suisse’s written opinion nor the summary of its opinion and the related analyses set forth in this joint proxy statement/prospectus are intended to be, and they do not constitute, advice or a recommendation to any holder of Range common stock as to how such holder should vote or act on any matter relating to the merger.

The Memorial Special Meeting (see page 45)

The special meeting of Memorial stockholders will be held at Memorial’s offices at 500 Dallas Street, Suite 1800, Houston, Texas 77002, on                      , 2016, at              , local time. The special meeting of Memorial stockholders is being held in order to consider and vote on:

Completion of the merger is conditioned on approval and adoption of the merger agreement and the transactions contemplated by the merger agreement, including the merger, by the Memorial stockholders. The proposal to approve, on an advisory (non-binding) basis, the compensation that may be paid or become payable to Memorial’s named executive officers in connection with the merger is a vote separate and apart from the vote on the proposal to approve and adopt the merger agreement and the transactions contemplated by the merger agreement, including the merger. Accordingly, a Memorial stockholder may vote to approve one proposal and not the other. Because the vote on the proposal to approve, on an advisory (non-binding) basis, the compensation that may be paid or become payable to Memorial’s named executive officers in connection with the merger is advisory in nature only, it will not be binding on Memorial or Range, and the approval of that proposal is not a condition to the completion of the merger.

Only record holders of shares of Memorial common stock at the close of business on                      , 2016, the record date for the Memorial special meeting, are entitled to notice of, and to vote at, the Memorial special meeting. At the close of business on the record date, the only outstanding voting securities of Memorial were common stock, and          shares of Memorial common stock were issued and outstanding and entitled to vote at the Memorial special meeting, approximately          of which were owned and entitled to be voted by Memorial directors and executive officers. The Memorial directors and executive officers are currently expected to vote their shares in favor of each of the Memorial proposals listed above.

In connection with the execution of the merger agreement, MRD Holdco LLC, Jay Graham (Memorial’s chief executive officer), Anthony Bahr and WHR Incentive LLC (a limited liability company controlled by Mr. Graham and Mr. Bahr) entered into a voting and support agreement with Range (referred to in this joint proxy statement/prospectus as the “voting and support agreement”). The Memorial stockholders that executed the voting and support agreement have agreed to vote all of the Memorial shares held by them in favor of the approval and adoption of the merger agreement and the transactions contemplated by the merger agreement, including the merger. As of the date of this joint proxy statement/prospectus, those stockholders hold and are entitled to vote in the aggregate approximately 47.6% of the issued and outstanding shares of Memorial common stock entitled to vote at the Memorial special meeting. In addition, certain other stockholders of Memorial who are not party to the voting and support agreement are party to the existing voting agreement, pursuant to which those stockholders are required to vote all of the shares of Memorial common stock that they own as directed by MRD Holdco LLC. As of the date of this joint proxy statement/prospectus, those additional stockholders hold and are entitled to vote in the aggregate approximately 2.7% of the outstanding shares of Memorial common stock entitled to vote at the Memorial special meeting. Accordingly, as long as the Memorial board of directors does not change its recommendation with respect to such proposal (in which case the voting and support obligations of such stockholders would terminate), and as long as those additional stockholders retain ownership of their shares of Memorial common stock through the record date for the Memorial special meeting, approval of that proposal at the Memorial special meeting is nearly assured. See “The Merger Agreement—Voting and Support Agreement” beginning on page 138 for more information.

With respect to each Memorial proposal listed above, Memorial stockholders may cast one vote for each share of Memorial common stock that they own as of the Memorial record date. The proposal to approve and adopt the merger agreement and the transactions contemplated by the merger agreement, including the merger, requires the affirmative vote of a majority of the outstanding shares of Memorial common stock entitled to vote

thereon. The proposal to approve, on an advisory (non-binding) basis, the compensation that may be paid or become payable to Memorial’s named executive officers in connection with the merger requires the affirmative vote of a majority of the voting power of the outstanding shares present in person or represented by proxy at the special meeting and entitled to vote thereon, assuming a quorum is present. The proposal to approve adjournment of the Memorial special meeting, if necessary or appropriate, to solicit additional proxies requires the affirmative vote of a majority of the voting power of the outstanding shares present in person or represented by proxy at the special meeting and entitled to vote thereon, regardless of whether there is a quorum.

No business may be transacted at the Memorial special meeting unless a quorum is present. If a quorum is not present, or if fewer shares are voted in favor of the proposal to approve and adopt the merger agreement and the transactions contemplated by the merger agreement, including the merger, than is required, then the chairman of the meeting has the power to adjourn the meeting, or, alternatively, Memorial stockholders may be asked to vote on a proposal to adjourn the Memorial special meeting in order to permit the further solicitation of proxies. No notice of an adjourned meeting need be given unless the date, time and place of the resumption of the meeting are not announced at the adjourned meeting, the adjournment is for more than 30 days, or, if after the adjournment, a new record date is fixed for the adjourned meeting, in which cases a notice of the adjourned meeting shall be given to each stockholder of record entitled to vote at the meeting. Unless otherwise agreed to by Range and Memorial, the special meeting may not be adjourned or postponed to a date more than 20 business days after the date for which the meeting was previously scheduled and the special meeting may not be adjourned or postponed to a date on or after two business days before December 15, 2016.

Reasons for the Merger; Recommendation of the Memorial Board of Directors (see page 75)

The Memorial board of directors unanimously determined that the merger and the other transactions contemplated by the merger agreement are fair to, and in the best interests of Memorial stockholders, and approved, adopted and declared advisable the merger agreement and the transactions contemplated by the merger agreement, including the merger. For more information regarding the factors considered by the Memorial board of directors in reaching its decision to recommend the approval of the merger agreement, see the section titled “The Merger—Memorial’s Reasons for the Merger; Recommendation of the Memorial board of directors.” The Memorial board of directors unanimously recommends that Memorial stockholders vote “FOR” the proposal to approve and adopt the merger agreement and the transactions contemplated by the merger agreement, including the merger, “FOR” the proposal to approve, on an advisory (non-binding) basis, the compensation that may be paid or become payable to Memorial’s named executive officers in connection with the merger and “FOR” the proposal to approve the adjournment of the Memorial special meeting to a later date or dates, if necessary or appropriate, to solicit additional proxies in the event there are not sufficient votes at the time of the special meeting to approve and adopt the merger agreement.

Opinions of Memorial’s Financial Advisors (see page 80)

Opinion of Barclays Capital Inc.

Memorial engaged Barclays Capital Inc., or Barclays, to act as its financial advisor with respect to the merger. On May 15, 2016, Barclays rendered its oral opinion (which was subsequently confirmed in writing) to the Memorial board of directors that, as of such date and based upon and subject to the qualifications, limitations and assumptions stated in its opinion, the exchange ratio provided for in the merger is fair, from a financial point of view, to the holders of Memorial common stock (other than shares held by Memorial as treasury shares or shares held by Range or Merger Sub or by any wholly owned subsidiary of Range, Merger Sub or Memorial, which we collectively refer to in this joint proxy statement/prospectus as “excluded shares”). The full text of Barclays’ written opinion, dated as of May 15, 2016, is attached as Annex C to this joint proxy statement/prospectus and sets forth, among other things, the assumptions made, procedures followed, factors considered and limitations upon the review undertaken by Barclays in rendering its opinion. The summary of Barclays’ opinion is qualified in its entirety by reference to the full text of the opinion.

Barclays’ opinion is addressed to the Memorial board of directors, addresses only the fairness, from a financial point of view, of the exchange ratio to the holders of Memorial common stock (other than excluded shares) as of the date of the opinion and does not constitute a recommendation to any stockholder of Memorial as to how such stockholder should vote with respect to the merger or any other matter. Barclays was not requested to address, and its opinion does not in any manner address, Memorial’s underlying business decision to proceed with or effect the merger.

For a more complete discussion of Barclays’ opinion, see “The Merger-Opinions of Memorial’s Financial Advisors-Opinion of Barclays Capital Inc.” beginning on page 80.

Opinion of Morgan Stanley & Co. LLC

Memorial retained Morgan Stanley & Co. LLC, which we refer to in this joint proxy statement/prospectus as “Morgan Stanley,” in connection with the merger. On May 15, 2016, Morgan Stanley rendered to the Memorial board of directors its oral opinion, subsequently confirmed in writing on May 15, 2016, that, as of such date and based upon and subject to the various assumptions made, procedures followed, matters considered and qualifications and limitations on the scope of the review undertaken by Morgan Stanley as set forth in its written opinion, the exchange ratio pursuant to the merger agreement was fair, from a financial point of view, to the holders of Memorial common stock (other than excluded shares). The full text of Morgan Stanley’s written opinion, dated as of May 15, 2016, to the Memorial board of directors, which sets forth, among other things, the assumptions made, procedures followed, matters considered and qualifications and limitations on the scope of review undertaken by Morgan Stanley in rendering its opinion, is attached as Annex D to, and is incorporated by reference into, this joint proxy statement/prospectus. The summary of the opinion of Morgan Stanley in this joint proxy statement/prospectus is qualified in its entirety by reference to the full text of the opinion. We encourage you to read Morgan Stanley’s opinion and the summary of Morgan Stanley’s opinion below carefully and in their entirety.

Morgan Stanley’s opinion was rendered for the benefit of the Memorial board of directors, in its capacity as such, and addressed only the fairness, from a financial point of view, of the exchange ratio pursuant to the merger agreement to the holders of Memorial common stock (other than excluded shares) as of the date of the opinion. Morgan Stanley’s opinion does not address any of the relative merits of the transactions contemplated by the merger agreement as compared to other business or financial strategies that might be available to Memorial, nor does it address the underlying business decision of Memorial to enter into the merger agreement or proceed with any other transaction contemplated by the merger agreement. In addition, Morgan Stanley’s opinion does not in any manner address the prices at which Range common stock will trade following the consummation of the merger or at any time. The opinion was addressed to, and rendered for the benefit of, the Memorial board of directors and was not intended to, and does not, constitute advice or a recommendation to any holder of Memorial common stock as to how to vote or act on any matter with respect to the merger.

For a more complete discussion of Morgan Stanley’s opinion, see “The Merger—Opinions of Memorial’s Financial Advisors—Opinion of Morgan Stanley & Co. LLC.” beginning on page 91.

The Merger

A copy of the merger agreement is attached as Annex A to this joint proxy statement/prospectus. Range and Memorial encourage you to read the entire merger agreement carefully because it is the principal document governing the merger. For more information on the merger agreement, see the section titled “The Merger Agreement” beginning on page 120.

Form of the Merger (see page 120)

Subject to the terms and conditions of the merger agreement, at the effective time of the merger, Merger Sub, a wholly owned subsidiary of Range that was formed for the sole purpose of effecting the merger, will merge with and into Memorial. Memorial will survive the merger and become a wholly owned subsidiary of Range.

Merger Consideration (see page 120)

Memorial stockholders will have the right to receive 0.375 of a share of Range common stock for each share of Memorial common stock they hold immediately prior to the effective time of the merger (the “exchange ratio”) and, in lieu of any fractional shares, cash (without interest) in an amount equal to the product of (i) such fractional part of a share of Range common stock multiplied by (ii) the volume weighted average price of Range common stock for the five consecutive trading days immediately prior to the closing date of the merger as reported by Bloomberg, L.P. The exchange ratio is fixed and will not be adjusted for changes in the market value of the common stock of Memorial or Range. As a result, the implied value of the consideration to Memorial stockholders will fluctuate between the date of this joint proxy statement/prospectus and the effective time of the merger. Based on the closing price of Range common stock on the NYSE on May 13, 2016, the last trading day before public announcement of the merger, the aggregate value of the merger consideration payable to Memorial stockholders was approximately $3.2 billion.

Treatment of Memorial LTIP Restricted Stock Awards (see page 132)

Effective immediately prior to the effective time of the merger, each outstanding share of unvested restricted Memorial common stock will fully vest and any applicable restrictions will lapse and, at the effective time of the merger, each such share will be treated as a share of Memorial common stock, including with respect to the right to receive 0.375 of a fully vested share of Range common stock.

Expected Timing of the Merger

Range and Memorial currently expect the closing of the merger to occur late in the third quarter of 2016. However, the merger is subject to the satisfaction or waiver of conditions as described in the merger agreement, and it is possible that factors outside the control of Range and Memorial could result in the merger being completed at an earlier time, a later time or not at all.

Conditions to Completion of the Merger (see page 133)

The obligations of Range, Memorial and Merger Sub to complete the merger are subject to the satisfaction or waiver of the following conditions to completion of the merger on or prior to the closing date:

In addition, Range’s and Merger Sub’s obligations to effect the merger are subject to the satisfaction or waiver of the following additional conditions:

In addition, Memorial’s obligations to effect the merger is subject to the satisfaction or waiver of the following additional conditions:

No Solicitation of Competing Proposals (see page 127)

The merger agreement generally precludes Memorial from soliciting or engaging in discussions or negotiations with respect to a proposal competing with the transactions contemplated by the merger agreement. However, if Memorial receives a proposal meeting certain requirements from a third party, and the Memorial board of directors determines in good faith (after consultation with its financial advisors and outside legal counsel) that such proposal is, or would or would reasonably be expected to lead to, a superior proposal that meets certain requirements as set forth in the merger agreement, Memorial may furnish non-public information to and enter into discussions with, and only with, that third party regarding such competing proposal. See the section titled “The Merger Agreement—No Solicitation of Competing Proposals.”

Changes in Board Recommendations (see page 129)

The merger agreement generally provides that, subject to the exceptions described below, Memorial may not change its recommendation that Memorial stockholders adopt the merger agreement, and Range may not change its recommendation that Range stockholders approve the issuance of Range common stock in the merger.

However, notwithstanding the foregoing, the merger agreement provides that, prior to obtaining Memorial stockholder approval of the merger, Memorial—in response to a bona fide competing proposal that did not result from a material breach of the no-shop covenants and certain related covenants—may effect a change of recommendation, or terminate the merger agreement (subject to Memorial’s obligation to pay the termination fee as described below in “The Merger Agreement—Effect of Termination”), after satisfaction of certain conditions set forth under “The Merger Agreement—Changes in Board Recommendations.” In addition, the merger agreement provides that, prior to obtaining Memorial stockholder approval of the merger and in response to an intervening event with respect to Memorial, Memorial may effect a change of recommendation after satisfaction of certain conditions set forth under “The Merger Agreement—Changes in Board Recommendations.

The merger agreement also provides that, prior to obtaining Range stockholder approval of the proposed issuance of Range common stock in the merger and in response to an intervening event with respect to Range, the Range board of directors or any committee thereof may effect a change of recommendation after satisfaction of certain conditions set forth under “The Merger Agreement—Changes in Board Recommendations.

Termination of the Merger Agreement (see page 134)

The merger agreement may be terminated at any time prior to the effective time of the merger, whether (except as described below) before or after the receipt of the required stockholder approvals, under the following circumstances:

Termination Fees and Expenses (see page 136)

Generally, all fees and expenses incurred in connection with the merger agreement and the transactions contemplated by the merger agreement will be paid by the party incurring those expenses, subject to the specific exceptions discussed in this joint proxy statement/prospectus. In the event the merger agreement is terminated by either Range or Memorial because of the failure to obtain Range stockholder approval, then Range will pay to Memorial a no vote expense payment equal to $25,000,000. In the event the merger agreement is terminated by either Range or Memorial because of the failure to obtain Memorial stockholder approval, then Memorial will pay Range a no vote expense payment equal to $25,000,000. In certain circumstances, Memorial may be required to pay Range a termination fee of $75,000,000, or Range may be required to pay Memorial a termination fee of $125,000,000 or an alternative proposal fee of $300,000,000. See the section titled “The Merger Agreement—Termination Fees and Expenses” beginning on page 136 for a discussion of the circumstances under which such termination fee or no vote expense payment will be required to be paid.

Comparison of Stockholder Rights and Corporate Governance Matters (see page 165)

The governing corporate documents of Memorial differ from the governing corporate documents of Range, in some cases materially. As a result, Memorial stockholders that receive Range common stock as merger consideration will have different rights once they become stockholders of Range. These differences are described in detail under the section titled “Comparison of Rights of Range Stockholders and Memorial Stockholders.”

Listing of Shares of Range Common Stock; De-Listing and Deregistration of Shares of Memorial Common Stock (see page 118)

It is a condition to the completion of the merger that the shares of Range common stock to be issued to Memorial stockholders be authorized for listing on the NYSE at the effective time of the merger, subject to official notice of issuance. Upon completion of the merger, shares of Memorial common stock currently listed on the NASDAQ will cease to be listed for trading on the NASDAQ and will be subsequently deregistered under the Exchange Act.

Interests of Memorial Directors and Executive Officers in the Merger (see page 111)

Memorial’s directors and executive officers have interests in the merger that may be different from, or in addition to, the interests of the Memorial stockholders generally. The members of the Memorial board of directors were aware of and considered these interests, among other matters, in evaluating and negotiating the merger agreement and the merger, and in recommending that Memorial stockholders approve and adopt the merger agreement and the transactions contemplated by the merger agreement, including the merger.

These interests include:

Regulatory Clearances Required to Complete the Transactions (see page 116)

Consummation of the merger is subject to the expiration or termination of any applicable waiting period under the HSR Act. On June 6, 2016, Range and Memorial filed Notification and Report Forms with the Antitrust Division of the Department of Justice, which is referred to as the Antitrust Division, and the Federal Trade Commission, which is referred to as the FTC. See “The Merger—Regulatory Clearances Required for the Merger.”

Board of Directors and Executive Management Following the Merger (see page 116)

The merger agreement provides that, upon completion of the merger, Range will increase the size of the Range board of directors by one member and the Memorial board of directors will designate one of its members, subject to consent by the Governance and Nominating Committee of the Range board of directors, to fill the new Range directorship created by that increase. It is anticipated that, following the completion of the merger, the Range board of directors will have ten members, consisting of the Memorial designee described above and the nine individuals serving on the Range board of directors as of the date of this joint proxy/statement prospectus.

Following the completion of the merger, it is anticipated that each of the Range executive officers will continue to serve in their current positions and under the same compensation plans and arrangements that were in place prior to the merger.

No Appraisal Rights (see page 119)

Neither the holders of shares of Range common stock nor the holders of shares of Memorial common stock are entitled to appraisal rights in connection with the merger in accordance with Delaware law, nor do the certificates of incorporation or bylaws of either company provide any stockholder with any such appraisal rights.

Exchange of Shares in the Merger (see page 121)

Prior to the effective time of the merger, Range will enter into an agreement with Memorial’s transfer agent or another entity reasonably acceptable to Memorial to act as agent for the holders of Memorial common stock in connection with the merger and to receive the merger consideration and cash sufficient to pay cash (without interest) in lieu of fractional shares to which holders of fractional shares may become entitled. At the effective time of the merger, each share of Memorial common stock outstanding immediately prior to the effective time will be converted into the right to receive 0.375 of a share of Range common stock.

Promptly after the effective time of the merger, but in no event later than three business days after the closing date of the merger, Range will cause the exchange agent to mail to each holder of Memorial common stock a stock certificate or a letter of transmittal specifying, among other things, that delivery will be effected, and risk of loss and title to any certificates shall pass, only upon proper delivery of such certificates to the exchange agent, or in the case of book entry shares, upon adherence to the procedures set forth in the letter of transmittal. Such letter of transmittal will also include instructions explaining the procedure for surrendering Memorial stock certificates in exchange for shares of Range common stock or, in the case of book entry shares, the surrender of such shares for payment of the merger consideration.

After the effective time of the merger, shares of Memorial common stock will no longer be outstanding, will be automatically canceled and will cease to exist and each certificate or book entry share, if any, that previously represented shares of Memorial common stock will represent only the right to receive the merger consideration as described above, any cash in lieu of fractional shares of Range common stock and any dividends or other distributions to which the holders of the certificates become entitled upon surrender of such certificates. With respect to such shares of Range common stock deliverable upon the surrender of Memorial stock certificates or book entry shares, until holders of such Memorial stock certificates or book entry shares have surrendered such stock certificates or book entry shares to the exchange agent, those holders will not receive dividends or distributions declared or made with respect to such shares of Range common stock with a record date after the effective time of the merger.

Memorial stockholders will not receive any fractional shares of Range common stock pursuant to the merger. Instead of any fractional shares, Memorial stockholders will be paid an amount in cash (without interest) for such fraction of a share calculated by multiplying the fractional share interest to which such holder would otherwise be entitled by the volume weighted average price of Range common stock for the five consecutive trading days immediately ending on the closing date of the merger as reported by Bloomberg, L.P.

Range stockholders need not take any action with respect to their stock certificates.

Anticipated Accounting Treatment (see page 146)

Range prepares its financial statements in accordance with U.S. Generally Accepted Accounting Principles (“GAAP”). The merger will be accounted for using the acquisition method of accounting with Range being

considered the acquirer of Memorial for accounting purposes. This means that Range will allocate the purchase price to the fair value of Memorial’s tangible and intangible assets and liabilities at the acquisition date, with the excess purchase price being recorded as goodwill. Under the acquisition method of accounting, goodwill is not amortized but is tested for impairment at least annually.

Material U.S. Federal Income Tax Consequences (see page 143)

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. Assuming the merger qualifies as a reorganization, a U.S. holder of Memorial common stock will not recognize any gain or loss for U.S. federal income tax purposes upon the exchange of the holder’s shares of Memorial common stock for shares of Range common stock pursuant to the merger, except with respect to cash received in lieu of fractional shares of Range common stock.

As a condition to the completion of the merger, Memorial and Range will each have received an opinion, dated as of the closing date of the merger, that the merger will be treated for U.S. federal income tax purposes as a “reorganization” within the meaning of Section 368(a) of the Code. An opinion of counsel represents such counsel’s best legal judgment but is not binding on the Internal Revenue Service (the “IRS”) or any court, so there can be no certainty that the IRS will not challenge the conclusions reflected in the opinion or that a court would not sustain such a challenge.

The tax opinions regarding the merger will not address any U.S. federal tax consequences other than U.S. federal income tax consequences, or any U.S. state, local or non-U.S. tax consequences, of the merger. The opinions will be based on certain assumptions and representations as to factual matters from Range and Memorial, as well as certain covenants and undertakings by Range and Memorial. If any of the assumptions, representations, covenants or undertakings is incorrect, incomplete, inaccurate or violated in any material respect, the validity of the conclusions reached by counsel in their opinions would be jeopardized and the tax consequences of the merger could differ from those described in this joint proxy statement/prospectus. Neither Range nor Memorial is currently aware of any facts or circumstances that would cause the assumptions, representations, covenants and undertakings to be incorrect, incomplete, inaccurate or violated in any material respect.

You are urged to consult your own tax advisor regarding the particular consequences to you of the merger.

Risk Factors (see page 31)

In evaluating the merger, in addition to the other information contained in this joint proxy statement/prospectus, you should carefully consider the risk factors relating to the merger and each of Range and Memorial beginning on page 31.

Summary Selected Consolidated Financial Data

Summary Selected Consolidated Historical Financial Data of Range

The following table sets forth Range’s selected consolidated historical financial information that has been derived from (1) Range’s consolidated financial statements as of December 31, 2015, 2014, 2013, 2012 and 2011 and (2) Range’s consolidated financial statements for the three months ended March 31, 2016 and 2015. This disclosure does not include the effects of the merger. You should read this financial information in conjunction with “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and its consolidated financial statements and notes thereto in Range’s Annual Report on Form 10-K for the year ended December 31, 2015 and Quarterly Report on Form 10-Q for the quarter ended March 31, 2016, each of which is incorporated into this joint proxy statement/prospectus by reference. The selected statement of operations data for the years ended December 31, 2012 and 2011 and selected balance sheet data as of December 31, 2013, 2012 and 2011 have been derived from Range’s audited consolidated financial statements for such years, which have not been incorporated into this joint proxy statement/prospectus by reference. See “Where You Can Find More Information” beginning on page 187.

Summary Selected Consolidated Historical Financial Data of Memorial

The following table sets forth Memorial’s selected consolidated historical financial information that has been derived from (1) Memorial’s consolidated financial statements as of and for the years ended December 31, 2015, 2014, 2013 and 2012 and (2) Memorial’s consolidated financial statements as of and for the three months ended March 31, 2016 and 2015. This disclosure does not include the effects of the merger. You should read this financial information in conjunction with “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and its consolidated financial statements and notes thereto in Memorial’s Annual Report on Form 10-K for the year ended December 31, 2015 and Quarterly Report on Form 10-Q for the quarter ended March 31, 2016, each of which is incorporated into this joint proxy statement/prospectus by reference. The selected statement of operations data and cash flow data for the year ended December 31, 2012 and selected balance sheet data as of December 31, 2013 and 2012 have been derived from Memorial’s audited consolidated financial statements for such years, which have not been incorporated into this joint proxy statement/prospectus by reference. The selected balance sheet data as of March 31, 2015 has been derived from Memorial’s unaudited consolidated financial statements as of March 31, 2015, which have not been incorporated into this joint proxy statement/prospectus by reference. See “Where You Can Find More Information” beginning on page 187.

On April 27, 2016, Memorial entered into an agreement to sell the general partner of MEMP (“MEMP GP”), together with related entities providing services to MEMP, to MEMP for $0.75 million. That sale was completed on June 1, 2016. MEMP is a publicly-traded limited partnership (NASDAQ: MEMP) in which Memorial’s only economic interest prior to that sale was its ownership of MEMP GP, which at the time of the

sale owned an approximate 0.1% general partner interest in MEMP and 50% of the incentive distribution rights in MEMP. Because Memorial controlled MEMP until the completion of the sale, Memorial has historically consolidated the operations of MEMP and its subsidiaries in Memorial’s financial statements and reported MEMP and its subsidiaries as a separate reportable business segment. Memorial no longer owns any interest in MEMP and will therefore report its operations as a single reportable business segment. See “Unaudited Pro Forma Condensed Combined Financial Information” beginning on page 147. In addition, for more information with respect to the sale of MEMP GP and related entities—which disposition qualifies as a discontinued operation since MEMP was a reportable business segment—see Memorial’s Current Report on Form 8-K filed on June 1, 2016, which has been incorporated into this joint proxy statement/prospectus by reference.

Summary Selected Unaudited Pro Forma Condensed Combined Financial Information

The following selected unaudited pro forma condensed combined consolidated statements of operations data for the three months ended March 31, 2016 and year ended December 31, 2015 have been prepared to give effect to the merger as if the merger had been completed on January 1, 2015. The unaudited pro forma condensed combined consolidated balance sheet data at March 31, 2016 have been prepared to give effect to the merger as if the merger was completed on March 31, 2016. The following selected unaudited pro forma condensed combined consolidated financial information should be read in conjunction with the section titled “Unaudited Pro Forma Condensed Combined Financial Statements” and related notes included in this joint proxy statement/prospectus beginning on page 147.

The pro forma financial statements have been prepared using the acquisition method of accounting for business combinations under GAAP, with Range treated 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 closing. The acquisition method of accounting is dependent upon certain valuations and other studies that have yet to commence or progress to a stage where there is sufficient information for a definitive measure. The sources and amounts of merger transaction expenses may also differ from that assumed in the following pro forma adjustments. Accordingly, the pro forma adjustments are preliminary, have been made solely for the purpose of providing pro forma financial statements, and are subject to revision based on a final determination of fair value as of the date of acquisition. Differences between these preliminary estimates and the final acquisition accounting may have a material impact on the accompanying pro forma financial statements and the combined company’s future results of operations and financial position.

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.

Summary Pro Forma Combined Oil and Natural Gas Reserve and Production Data

The following table presents selected unaudited pro forma information regarding Range’s proved reserves as of December 31, 2015 after giving effect to the acquisition of Memorial’s proved reserves as if they were acquired on December 31, 2015.

The following estimates of the net proved oil and natural gas reserves of Range’s oil and gas properties as of December 31, 2015 are based on evaluations prepared by Range’s internal reservoir engineers. Wright & Company, Inc., an independent petroleum engineering firm conducted an audit of 94% of Range’s proved reserves. The following estimates of the net proved oil and natural gas reserves of Memorial’s oil and gas properties as of December 31, 2015 (which exclude net proved oil and natural gas reserves attributable to MEMP) are based on evaluations prepared by Memorial’s internal reservoir engineers and were audited by independent petroleum engineers Netherland, Sewell & Associates, Inc.

There are numerous uncertainties inherent in estimating quantities and values of proved reserves and in projecting future rates of production and the amount and timing of development expenditures, including many factors beyond the property owner’s control. The following reserve data represents estimates only and should not be construed as being precise. The assumptions used in preparing these estimates may not be realized, causing the quantities of oil and gas that are ultimately recovered, the timing of the recovery of oil and gas reserves, the production and operating costs incurred and the amount and timing of future development expenditures to vary from the estimates presented herein. Actual production, revenues and expenditures with respect to reserves will vary from estimates and the variances may be material.

These estimates were calculated using the 12-month average of the first day of the month reference prices as adjusted for location and quality differentials. Any significant price changes will have a material effect on the quantity and present value of the reserves. These estimates depend on a number of variable factors and assumptions, including historical production from the area compared with production from other comparable producing areas, the assumed effects of regulations by governmental agencies, assumptions concerning future oil and gas prices, and assumptions concerning future operating costs, transportation costs, severance and excise taxes, development costs and workover and remedial costs.

Estimated Quantities of Oil and Natural Gas Reserves as of

December 31, 2015

As of March 31, 2016, significant changes in the pro forma estimates of total proved natural gas, NGLs and oil reserve quantities since December 31, 2015 were (1) Range’s sale of certain Oklahoma reserves of approximately 26,681 mmcfe in the second quarter 2016 and (2) the sale of an approximately 139,207 mmcfe non-operated working interest in Northeast Pennsylvania in first quarter 2016.

The following table sets forth summary pro forma information with respect to Range’s and Memorial’s combined oil and natural gas production for the year ended December 31, 2015 and three months ended March 31, 2016. This pro forma information gives effect to the merger as if each had occurred on January 1, 2015.

The Range and Memorial production data presented below was derived from Range’s and Memorial’s respective Annual Report on Form 10-K for the year ended December 31, 2015 and Quarterly Report on Form 10-Q for the three months ended March 31, 2016.

Unaudited Comparative Per Share Data

The following table sets forth certain historical net income (loss) per share of Range and Memorial and per share book value information on an unaudited pro forma combined basis after giving effect to the merger.

Historical per share data of Range for the year ended December 31, 2015 and the three months ended March 31, 2016 was derived from Range’s historical financial statements for the respective periods. Historical per share data of Memorial for the year ended December 31, 2015 and the three months ended March 31, 2016 was derived from Memorial’s historical financial statements for the respective periods. This information should be read together with the consolidated financial statements and related notes of Range and Memorial that are incorporated into this joint proxy statement/prospectus by reference. See “Where You Can Find More Information” beginning on page 187.

Unaudited pro forma combined per share data for the year ended December 31, 2015 and the three months ended March 31, 2016 was derived and should be read in conjunction with the unaudited pro forma condensed combined financial data included under “Unaudited Pro Forma Condensed Combined Financial Information” beginning on page 147. The pro forma information is presented for illustrative purposes only and is not necessarily indicative of the operating results or financial position that would have occurred if the merger had been completed as of the beginning of the period.