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): August 1, 2016

COMSTOCK RESOURCES, INC.

(Exact Name of Registrant as Specified in Charter)

5300 Town and Country Boulevard

Suite 500

Frisco, Texas 75034

(Address of principal executive offices)

(972) 668-8800

(Registrant’s Telephone No.)

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:

We are filing this Current Report on Form 8-K (this “Form 8-K”) to update certain financial information in our Annual Report on Form 10-K for the fiscal year ended December 31, 2015 that we filed on February 26, 2016 (the “Form 10-K”), to reflect the one-for-five (1:5) reverse split of our issued and outstanding common stock which has been approved by our Board of Directors and became effective on July 29, 2016.

This Form 8-K presents disclosures updated from our Form 10-K, as originally filed, to reflect the application of the reverse stock split on a comparable basis for all years presented. All other information is presented as set forth in the Form 10-K and has not been updated in this Form 8-K. The updates to the Form 10-K, as set forth in this Form 8-K, for the retrospective application of the reverse stock split are consistent with the presentation in our quarterly report on Form 10-Q for the period ended June 30, 2016 which we are also filing with the Securities and Exchange Commission today. The sections of the Form 10-K affected by these changes are: Items 5, 6, 7, 12 and 15.

All such updated and enhanced items of the Form 10-K are set forth in their entirety in Exhibits 99.1 through 99.5 hereto, and are incorporated by reference herein.

We have not updated or enhanced any other disclosures presented in the Form 10-K. More current information is included in our other filings with the Securities and Exchange Commission. This Form 8-K, including the exhibits hereto, should be read in conjunction with the Form 10-K and our other filings. Other filings may contain important information regarding uncertainties, trends, risks, events, transactions, developments and updates to certain expectations that may have been reported since the filing of the Form 10-K.

SIGNATURES

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