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): December 12, 2016

RSP PERMIAN, INC.

(Exact name of registrant as specified in its charter)

3141 Hood Street, Suite 500

Dallas, Texas 75219

(Address of Principal Executive Offices)

(Zip Code)

(214) 252-2700

(Registrant’s Telephone Number, Including Area Code)

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:

Purchase Agreement

On December 12, 2016, RSP Permian, Inc. (the “Company”) entered into a Purchase Agreement (the “Purchase Agreement”) by and among the Company, the subsidiary guarantors named therein (the “Guarantors”) and Barclays Capital Inc. and RBC Capital Markets, LLC, as representatives of the several initial purchasers (the “Initial Purchasers”), pursuant to which the Company agreed to issue and sell to the Initial Purchasers $450.0 million aggregate principal amount of the Company’s 5.25% senior unsecured notes due 2025 (the “Notes”). The Notes will be sold at par and will result in net proceeds to the Company of approximately $443.9 million.

The Notes will be issued and sold to the Initial Purchasers pursuant to an exemption from the registration requirements of the Securities Act of 1933, as amended (the “Securities Act”), pursuant to Section 4(a)(2) thereunder. The Initial Purchasers intend to resell the Notes (i) inside the United States to “qualified institutional buyers,” as defined in Rule 144A under the Securities Act (“Rule 144A”) in private sales exempt from registration under the Securities Act in accordance with Rule 144A, and (ii) to other eligible purchasers pursuant to offers and sales that occur outside the United States within the meaning of Regulation S under the Securities Act (“Regulation S”) in accordance with Regulation S. The Notes have not been registered under the Securities Act or applicable state securities laws and may not be offered or sold in the United States absent registration or an applicable exemption from the registration requirements of the Securities Act and applicable state laws.

The Purchase Agreement contains customary representations and warranties of the parties and indemnification and contribution provisions under which the Company and the Guarantors, on the one hand, and the Initial Purchasers, on the other, have agreed to indemnify each other against certain liabilities, including liabilities under the Securities Act.

Relationships

The Initial Purchasers and certain of their affiliates have, from time to time, performed, and may in the future perform, various commercial and investment banking and financial advisory services for the Company and its affiliates, for which they received or may in the future receive customary fees and expenses. In particular, an affiliate of U.S. Bancorp Investments, Inc., one of the Initial Purchasers, will serve as trustee under the indenture governing the Notes.

A copy of the Purchase Agreement is filed as Exhibit 10.1 to this Form 8-K and is incorporated herein by reference. The description of the Purchase Agreement in this report is a summary and is qualified in its entirety by the terms of the Purchase Agreement.

The information included in Item 1.01 of this Current Report on Form 8-K is incorporated by reference into this Item 2.03 of this Current Report on Form 8-K.

On December 12, 2016, the Company issued a press release announcing the pricing of its private placement of the Notes. The Company is filing a copy of the press release as Exhibit 99.1 hereto, which is incorporated by reference into this Item 8.01.

The press release shall not constitute an offer to sell or the solicitation of an offer to buy, nor shall there be any sale of these securities in any state in which the offer, solicitation or sale would be unlawful prior to the registration or qualification under the securities laws of any such state.

(d) Exhibits.

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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.

Dated: December 12, 2016

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EXHIBIT INDEX

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