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) – September 11, 2015

Energy Future Holdings Corp.

(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 Future Competitive Holdings 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):

Background Information

On April 29, 2014, Energy Future Holdings Corp. (“EFH Corp.”) and the substantial majority of its direct and indirect subsidiaries, including Energy Future Intermediate Holding Company LLC (“EFIH”), Energy Future Competitive Holdings Company LLC (“EFCH”) and Texas Competitive Electric Holdings Company LLC (“TCEH”), but excluding Oncor Electric Delivery Holdings Company LLC (“Oncor”) and its direct and indirect subsidiaries, filed voluntary petitions for relief (the “Bankruptcy Filing”) under Chapter 11 of the United States Bankruptcy Code (the “Bankruptcy Code”) in the United States Bankruptcy Court for the District of Delaware (the “Bankruptcy Court”). During the pendency of the Bankruptcy Filing, EFH Corp. and its direct and indirect subsidiaries that are included in the Bankruptcy Filing (collectively, the “Debtors”) are operating their businesses as debtors-in-possession under the jurisdiction of the Bankruptcy Court and in accordance with the applicable provisions of the Bankruptcy Code.

Reference is made to the Current Report on Form 8-K/A filed with the Securities and Exchange Commission (the “SEC”) on August 10, 2015 by each of EFH Corp., EFIH and EFCH (the “August 10, 2015 8-K/A”) relating to, among other matters, (i) the third amended joint plan of reorganization (the “Third Amended Plan”) and a disclosure statement for the Third Amended Plan filed by the Debtors with the Bankruptcy Court, (ii) the Plan Support Agreement entered into on August 9, 2015 by each of the Debtors with (a) various of their respective creditors, (b) the sponsor equity owners of EFH Corp. (the “Sponsors”), (c) the statutory committee of unsecured creditors of EFCH, TCEH and the subsidiaries of TCEH that are Debtors in the Chapter 11 Cases (collectively, the “TCEH Debtors”) and EFH Corporate Services, and (d) other third parties in order to effect an agreed upon restructuring of the Debtors pursuant to the Third Amended Plan and (iii) the settlement agreement, dated as of August 9, 2015 (the “August Settlement Agreement”), among the Debtors, the Sponsors, certain settling TCEH first lien creditors, certain settling TCEH second lien creditors, certain settling TCEH unsecured creditors and the official committee of unsecured creditors of the TCEH Debtors (collectively, the “Settling Parties”) in order to compromise and settle certain claims among such parties (the “August Plan Support Agreement”), in each case on the terms described in the August 10, 2015 8-K/A.

Item 1.01. Entry into a Material Definitive Agreement.

Amended & Restated Plan Support Agreement

On September 11, 2015, each of the Debtors entered into an Amended & Restated Plan Support Agreement (the “Amended & Restated Plan Support Agreement”) (filed with the Bankruptcy Court on September 17, 2015) with various of their respective creditors, the Sponsors, the statutory committee of unsecured creditors of the TCEH Debtors and EFH Corporate Services, and other third parties, which effected, among other matters, changes to the August Plan Support Agreement relating to intercreditor arrangements among certain of the creditor parties.

On September 17, 2015, the Bankruptcy Court approved the entry by the Debtors into the Amended & Restated Plan Support Agreement.

The above description of the Amended & Restated Plan Support Agreement is qualified in its entirety by reference to the Amended & Restated Plan Support Agreement, which is attached as Exhibit 10(a) to this Current Report on Form 8-K and is also available at www.efhcaseinfo.com. Other information on or connected to this website does not constitute part of this Current Report on Form 8-K.

Settlement Agreement

On September 11, 2015, the Settling Parties entered into an amended and restated settlement agreement (the “Amended & Restated Settlement Agreement”) (filed with the Bankruptcy Court on September 17, 2015), which effected, among other matters, amendments to the August Settlement Agreement relating to intercreditor arrangements among certain of the creditor parties.

The Debtors expect to seek Bankruptcy Court approval of the Amended & Restated Settlement Agreement at the confirmation hearing for the plan of reorganization.

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The above description of the Amended & Restated Settlement Agreement is qualified in its entirety by reference to the Amended & Restated Settlement Agreement, which is attached as Exhibit 10(b) to this Current Report on Form 8-K and is also available at www.efhcaseinfo.com. Other information on or connected to this website does not constitute part of this Current Report on Form 8-K.

Cautionary Note Regarding Forward-Looking Statements

This Current Report on Form 8-K includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, which are subject to risks and uncertainties. All statements, other than statements of historical facts, are forward-looking statements. Readers are cautioned not to place undue reliance on forward-looking statements. Although we believe that in making any such forward-looking statement our expectations are based on reasonable assumptions, any such forward-looking statement involves uncertainties and is qualified in its entirety by reference to the discussion of risk factors under “Risk Factors” and the discussion under “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in the Annual Reports on Form 10-K and Quarterly Reports on Form 10-Q filed by each of EFH Corp., EFIH, EFCH and Oncor and the following important factors, among others, that could cause actual results to differ materially from those projected in such forward-looking statements:

Any forward-looking statement speaks only at the date on which it is made, and except as may be required by law, we undertake no obligation to update any forward-looking statement to reflect events or circumstances after the date on which it is made or to reflect the occurrence of unanticipated events. New factors may emerge from time to time, and it is not possible for us to predict all of them; nor can we assess the impact of each such factor or the extent to which any factor, or combination of factors, may cause results to differ materially from those contained in any forward-looking statement. As such, you should not unduly rely on such forward-looking statements.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits

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SIGNATURES

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: September 17, 2015