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):  June 14, 2018

Ring Energy, Inc.

(Exact name of registrant as specified in its charter)

(432) 682-7464

(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 (see General Instruction A.2. below):

¨   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))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Section 1 — Registrant’s Business and Operations

On June 14, 2018, Ring Energy, Inc. (the “Company”), as borrower, entered into an amendment to its credit agreement dated July 1, 2014 (“Credit Facility”) with SunTrust Bank, as lender, issuing bank and administrative agent for several banks and other financial institutions and lenders (“Administrative Agent”) (the “Amendment”). The Amendment, among other things, increased the borrowing base to $175,000,000 until the next scheduled redetermination or adjustment thereof pursuant to the Credit Facility.

A copy of the Amendment is filed as Exhibit 10.1 to this Current Report on Form 8-K and is incorporated by reference herein. The description of the Amendment in this Current Report on Form 8-K is a summary and is qualified in its entirety by reference to the complete text of the Amendment.

Please see the disclosure under Item 1.01 of this Current Report on Form 8-K, which disclosure is incorporated into this Item 2.03.

Section 9 — 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.