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) – April 15, 2013

Energy Future Holdings Corp.

(Exact name of registrant as specified in its charter)

Energy Future Competitive Holdings Company LLC

(Exact name of registrant as specified in its charter)

Energy Future Intermediate Holding Company LLC

(Exact name of registrant as specified in its charter)

Energy Plaza, 1601 Bryan Street, Dallas, Texas 75201

(Address of principal executive offices, including zip code)

214-812-4600

(Registrants’ 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 registrants under any of the following provisions (see General Instruction A.2. below):

Item 8.01. Other Events.

As previously disclosed, on April 1, 2013, Energy Future Holdings Corp., a Texas corporation (“EFH Corp.”), received a private letter ruling from the Internal Revenue Service (the “IRS”) in which the IRS ruled that upon the consummation of certain internal corporate transactions (the “Transactions”) involving EFH Corp. and Energy Future Competitive Holdings Company, a Texas corporation (“EFCH”), the excess loss account (the “ELA”) and a deferred intercompany gain (the “DIG”) that were reflected in the tax basis of the EFCH stock held by its parent company, EFH Corp. (the “EFCH Stock”), would be eliminated without causing the recognition of tax gain or loss. On April 15, 2013, EFH Corp. and EFCH completed the Transactions, resulting in the elimination of the DIG and the ELA.

In connection with the Transactions, (i) EFH Corp. contributed all of the EFCH Stock to a newly formed wholly-owned subsidiary, EFH2 Corp., a Texas corporation (“EFH2”), (ii) EFCH was converted from a Texas corporation into a Delaware limited liability company (the “Conversion”) and was renamed “Energy Future Competitive Holdings Company LLC” and (iii) EFH Corp. merged with and into EFH2 (the “Merger”), with the separate corporate existence of EFH Corp. having ceased and EFH2 continuing as the surviving corporation in the Merger (the “Surviving Corp.”). In connection with the Merger, the Surviving Corp. was renamed “Energy Future Holdings Corp.”

The Surviving Corp.’s directors and officers upon consummation of the Merger are the same as EFH Corp.’s directors and officers prior to the consummation of the Merger. Likewise, EFCH’s managers and officers upon consummation of the Conversion are the same as its directors and officers prior to the consummation of the Conversion. Immediately after the consummation of the Merger, each of the Surviving Corp. and EFCH had, on a consolidated basis, the same assets, businesses and operations as EFH Corp. and EFCH had, respectively, immediately prior to the consummation of the Merger. The Transactions had no, and will have no, effect on the Surviving Corp.’s or EFCH’s (or their respective subsidiaries’) results of operations, liquidity or financial statements.

As a result of the Merger, the Surviving Corp. became the successor issuer to EFH Corp. pursuant to Rule 414 under the Securities Act of 1933, as amended (the “Securities Act”), and Rule 12g-3(a) of the Securities Exchange Act of 1934, as amended.

On April 15, 2013, in connection with the Transactions, the Surviving Corp. entered into:

Pursuant to the terms of the Series P Notes Supplemental Indenture, the Series Q Notes Supplemental Indenture, the Series R Notes Supplemental Indenture, the LBO Notes Supplemental Indenture, the 9.75% Notes Supplemental Indenture and the 10.000% Notes Supplemental Indenture (collectively, the “Supplemental Indentures”), the Surviving Corp. assumed all of the obligations of EFH Corp. under the Series P Notes Indenture, the Series Q Notes Indenture, the Series R Notes Indenture, the LBO Notes Indenture, the 9.75% Notes Indenture and the 10.000% Notes Indenture, respectively, and under the applicable notes issued thereunder. The Surviving Corp. also assumed all of the obligations of EFH Corp. under the Registration Rights Agreement relating to the LBO Notes Indenture (the “LBO Notes Registration Rights Agreement”) and the 10.000% Notes Indenture, and Energy Future Intermediate Holding Company LLC, a direct subsidiary of EFH Corp., and EFCH each confirmed that its respective guarantee of EFH Corp.’s obligations under the LBO Notes Indenture, the notes issued thereunder (the “LBO Notes”) and the LBO Notes Registration Rights Agreement shall apply to the Surviving Corp.’s obligations under the LBO Notes Indenture, the LBO Notes and the LBO Notes Registration Rights Agreement.

SIGNATURE

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

Dated: April 15, 2013