Filing Details

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* Cimarex Energy Co. ----------------------------------------------------- (Name of Issuer) Common Stock ----------------------------------------------------- (Title of Class of Securities) 171798101 ----------------------------------------------------- (CUSIP Number) December 31, 2019 ----------------------------------------------------- (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: [X] Rule 13d-1(b) [ ] Rule 13d-1(c) [ ] Rule 13d-1(d) * The remainder of this cover page shall be filled out for a reporting person's Initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page. The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

CUSIP No. 1717981011. NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Diamond Hill Capital Management, Inc. ("Diamond Hill") 31-1019984 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (b) [ ] 3. SEC USE ONLY 4. CITIZENSHIP OR PLACE OF ORGANIZATION An Ohio Corporation NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH: 5. SOLE VOTING POWER 4,793,549 6. SHARED VOTING POWER 0 7. SOLE DISPOSITIVE POWER 5,198,099 8. SHARED DISPOSITIVE POWER 0 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 5,198,099 10. CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES [ ] 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.1% 12. TYPE OF REPORTING PERSON IA Item 1. (a) Name of Issuer Cimarex Energy Co. (b) Address of Issuer's Principal Executive Offices 1700 Lincoln Street, Suite 3700, Denver, CO 80203 Item 2. (a) Name of Person Filing Diamond Hill Capital Management, Inc. (b) Address of the Principal Office or, if none, residence 325 John H. McConnell Blvd., Suite 200, Columbus, OH 43215 (c) Citizenship An Ohio Corporation (d) Title of Class of Securities Common Stock (e) CUSIP Number 171798101 Item 3. If this statement is filed pursuant to Sections 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a: [ ]Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o). [ ]Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c). [ ]Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c). [ ]Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8). [X]An investment adviser in accordance with Section 240.13d-1(b)(1)(ii)(E); [ ]An employee benefit plan or endowment fund in accordance with Section 240.13d-1(b)(1)(ii)(F); [ ]A parent holding company or control person in accordance with Section 240.13d-1(b)(1)(ii)(G); [ ]A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813); [ ]A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3); [ ]Group, in accordance with section 240.13d-1(b)(1)(ii)(J). Item 4. Ownership. Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1. (a) Amount beneficially owned: 5,198,099 (b) Percent of class: 5.1% (c) Number of shares as to which the person has: (i) Sole power to vote or to direct the vote: 4,793,549 (ii) Shared power to vote or to direct the vote: 0 (iii)Sole power to dispose or to direct the disposition of: 5,198,099 (iv) Shared power to dispose or to direct the disposition of: 0 Item 5. Ownership of Five Percent or Less of a Class. If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following [ ]. Item 6. Ownership of More than Five Percent on Behalf of Another Person. Diamond Hill does not serve as custodian of the assets of any of its clients; accordingly, in each instance only the client or the client's custodian or trustee bank has the right to receive dividends paid with respect to, and proceeds from the sale of, such securities. The ultimate power to direct the receipt of dividends paid with respect to, and the proceeds from the sale of, such securities, is vested in the individual and institutional clients which Diamond Hill serves as investment adviser. Any and all discretionary authority which has been delegated to Diamond Hill may be revoked in whole or in part at any time. Except as may be indicated if this is a joint filing with one of the registered investment companies sponsored by Diamond Hill which it also serves as investment adviser ("Diamond Hill Funds"), not more than 5% of the class of such securities is owned by any one client subject to the investment advice of Diamond Hill. Item 7. Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company. Not Applicable Item 8. Identification and Classification of Members of the Group. Not Applicable Item 9. Notice of Dissolution of Group. Not Applicable Item 10. Certification. The following certification shall be included if the statement is filed pursuant to Section 240.13d-1(b): By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect. After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. Dated: 2/12/2020 By: /s/ Gary Young Gary Young Chief Compliance Officer