NINTH SUPPLEMENTAL INDENTURE

Ninth Supplemental Indenture (this “Supplemental Indenture”), dated as of April 15, 2013, between Energy Future Holdings Corp. (formerly EFH2 Corp.), a Texas corporation (the “Company”), and The Bank of New York Mellon Trust Company, N.A., a national banking association, as Trustee (the “Trustee”).

WHEREAS, Energy Future Holdings Corp., a Texas corporation (the “Predecessor”), has heretofore executed and delivered to the Trustee an Indenture, dated as of January 12, 2010, as supplemented and amended by the First Supplemental Indenture, dated as of March 16, 2010, the Second Supplemental Indenture, dated as of April 13, 2010, the Third Supplemental Indenture, dated as of April 14, 2010, the Fourth Supplemental Indenture, dated as of May 21, 2010, the Fifth Supplemental Indenture, dated as of July 2, 2010, the Sixth Supplemental Indenture, dated as of July 6, 2010, the Seventh Supplemental Indenture, dated as of July 7, 2010, and the Eighth Supplemental Indenture, dated as of January 25, 2013 (as so supplemented and amended, the “Indenture”), providing for the issuance of the Predecessor's 10.000% Senior Secured Notes due 2020 (the “Notes”);

WHEREAS, the Predecessor has contributed all of the capital stock of Energy Future Competitive Holdings Company to the Company, which contribution did not constitute the transfer of all or substantially all of the properties or assets of the Predecessor;

WHEREAS, on the date hereof, simultaneously with the effectiveness of this Supplemental Indenture, the Predecessor shall have merged with and into the Company, with the Company continuing its existence under the laws of the State of Texas, and the merger shall have become effective under the laws of the State of Texas;

WHEREAS, Section 5.01(a) of the Indenture provides, among other things, that the Predecessor shall not merge with or into any Person unless the Successor Company (as defined in the Indenture), if other than the Predecessor, expressly assumes (i) all the obligations of the Predecessor under the Notes, the Indenture and the Security Documents, to the extent the Predecessor is a party thereto, pursuant to a supplemental indenture or other document or instrument in form reasonably satisfactory to the Trustee and (ii) the Registration Rights Agreement (as defined in the Indenture);

WHEREAS, Section 5.02 of the Indenture provides that, upon any merger in accordance with Section 5.01 of the Indenture (other than as otherwise provided in Section 5.02), the successor corporation into or with which the Predecessor is merged shall succeed to, and be substituted for (so that from and after the date of such merger, the provisions of the Indenture referring to the “Issuer” shall refer instead to the successor corporation and not to the Predecessor), and may exercise every right and power of, the Predecessor under the Indenture with the same effect as if such successor Person had been named as the “Issuer” in the Indenture;

WHEREAS, Section 9.01 of the Indenture provides that, without the consent of any Holders, the Company and the Trustee may amend or supplement the Indenture, the Notes or any Security Document, at any time after the Issue Date, to comply with Section 5.01 of the Indenture or to provide for the assumption of the Predecessor's obligations to the Holders;

WHEREAS, the Company desires and has requested that the Trustee join in execution of this Supplemental Indenture for the purpose of evidencing such succession and assumption;

WHEREAS, the Company has been duly authorized to enter into this Supplemental Indenture;

WHEREAS, all conditions necessary to authorize the execution and delivery of this Supplemental Indenture and to make this Supplemental Indenture a valid and binding instrument enforceable in accordance with its terms have been complied with or have been done or performed; and

WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee is authorized to execute and deliver this Supplemental Indenture.

NOW THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the parties mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows: