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 9, 2012

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 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.

On August 9, 2012, Energy Future Intermediate Holding Company LLC (“EFIH”) and EFIH’s direct, wholly-owned subsidiary, EFIH Finance Inc. (together with EFIH, the “Issuers”), both of which are wholly-owned subsidiaries of Energy Future Holdings Corp., issued a press release announcing the pricing of $250 million principal amount of 6.875% Senior Secured Notes due 2017 (the “First Lien Notes”) and $600 million principal amount of additional 11.750% Senior Secured Second Lien Notes due 2022 (the “New Second Lien Notes” and, together with the First Lien Notes, the “Notes”) through a private placement. The offering of the Notes is expected to close on August 14, 2012 (the “Closing Date”), subject to customary closing conditions. The First Lien Notes will be issued under the Indenture, to be dated as of the Closing Date, among the Issuers and The Bank of New York Mellon Trust Company, N.A., as trustee. The New Second Lien Notes will be issued as additional notes under the Indenture, dated as of April 25, 2011, as supplemented by the first supplemental indenture, dated as of February 6, 2012, the second supplemental indenture, dated as of February 28, 2012, the third supplemental indenture, dated as of May 31, 2012, and the fourth supplemental indenture, to be dated as of the Closing Date, each among the Issuers and The Bank of New York Mellon Trust Company, N.A., as trustee, pursuant to which the Issuers previously issued $1.15 billion aggregate principal amount of 11.750% Senior Secured Second Lien Notes due 2022 (the “Existing Second Lien Notes”). The New Second Lien Notes will have identical terms, other than the issue date and issue price, and will constitute part of the same series, as the Existing Second Lien Notes. A copy of the press release is filed as Exhibit 99.1.

The press release shall not constitute an offer to sell, or the solicitation of an offer to buy, any of the Notes, nor shall there be any sale of the Notes in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of such state or jurisdiction. The Notes have not been registered under the Securities Act of 1933 (the “Securities Act”) or any state securities laws and may not be offered or sold in the United States absent registration or an applicable exemption from registration requirements of the Securities Act and applicable state securities laws. The Notes will be offered inside the United States only to qualified institutional buyers in reliance on Rule 144A under the Securities Act and to persons outside the United States in reliance on Regulation S under the Securities Act.

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: August 10, 2012