UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT PURSUANT TO

SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

Date of report (Date of earliest event reported): January 13, 2015 (January 9, 2015)

MEMORIAL RESOURCE DEVELOPMENT CORP.

(Exact Name of Registrant as Specified in Charter)

Registrant’s telephone number, including area code: (713) 588-8300

Not Applicable

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 5.02.  Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On January 9, 2015, the Board of Directors of Memorial Resource Development Corp. (the “Company”) made the grant of 9,695 restricted shares (the “Restricted Shares”) to John A. Weinzierl, the Company’s Chief Executive Officer pursuant to the Company’s 2014 Long-Term Incentive Plan.

On January 9, 2015, the Board of Directors of Memorial Production Partners GP LLC (“MEMP GP”), the general partner of Memorial Production Partners LP (the “Partnership”), approved a grant of 11,327 restricted common units representing limited partner interests in the Partnership (the “Restricted Units”) to Mr. Weinzierl pursuant to MEMP GP’s Long-Term Incentive Plan.

The grant of the Restricted Shares and the Restricted Units was in lieu of Mr. Weinzierl’s annual cash bonus for 2014.

The grant of the Restricted Shares to Mr. Weinzierl was made pursuant to a Restricted Stock Agreement, a form of which was previously filed with the Company’s Registration Statement on Form S-8, filed with the Securities and Exchange Commission (the “Commission”) on June 18, 2014 (the “Form S-8”), and will vest pro-rata over a three year period. The terms of the Restricted Stock Agreement are substantially the same as the terms set forth in the form of such agreement previously filed as Exhibit 4.6 to the Form S-8. The foregoing description is not complete and is qualified in its entirety by reference to the full text of the Form of Restricted Stock Agreement. A copy of the Form of Restricted Stock Agreement is filed as Exhibit 10.1 to this Current Report on Form 8-K and is incorporated in this Item 5.02 by reference.

The grant of the Restricted Units to Mr. Weinzierl was made pursuant to a Restricted Unit Agreement, a form of which was previously filed with the Partnership’s Registration Statement on Form S-8, filed with the Commission on December 14, 2011 (the “Partnership Form S-8”), and will vest pro-rata over a three year period. The terms of the Restricted Unit Agreement are substantially the same as the terms set forth in the form of such agreement previously filed as Exhibit 4.6 to the Partnership Form S-8. The foregoing description is not complete and is qualified in its entirety by reference to the full text of the Form of Restricted Unit Agreement. A copy of the Form of Restricted Unit Agreement is filed as Exhibit 10.2 to this Current Report on Form 8-K and is incorporated in this Item 5.02 by reference.

Item 9.01.  Financial Statements and Exhibits.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

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