Ninth Amendment to Receivables Purchase Agreement, dated as of March 26, 2021, among TXU Energy Receivables Company LLC, as seller, TXU Energy Retail Company LLC, as servicer, Vistra Operations Company LLC, as performance guarantor, certain purchaser agents and purchasers named therein, and Credit Agricole Corporate and Investment Bank, as administrator

This NINTH AMENDMENT (this “Amendment”), dated as of March 26, 2021, is among TXU ENERGY RECEIVABLES COMPANY LLC, a Delaware limited liability company, as seller (the “Seller”), TXU ENERGY RETAIL COMPANY LLC, a Texas limited liability company (“TXU”), as servicer (in such capacity, together with its successors and permitted assigns in such capacity, the “Servicer”), CREDIT AGRICOLE CORPORATE AND INVESTMENT BANK, a national banking association (“CACIB”), as Administrator (in such capacity, together with its successors and permitted assigns in such capacity, the “Administrator”), the PURCHASERS and PURCHASER AGENTS from time to time party to the Agreement (as defined below, the “Purchasers”) and VISTRA OPERATIONS COMPANY LLC, a Delaware limited liability company (“Vistra”), as Performance Guarantor. Capitalized terms used but not otherwise defined herein have the respective meanings assigned thereto in the Agreement (as defined below).

WHEREAS, the parties hereto are parties to the Receivables Purchase Agreement, dated as of August 21, 2018 (as amended, restated, supplemented or otherwise modified through the date hereof, the “Agreement”);

WHEREAS, concurrently herewith the parties are entering into a Purchaser Group Amendment Fee Letter (the “Amendment Fee Letter”); and

NOW, THEREFORE, for good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties agree as follows:

“Period” means each of Period 1, Period 2, Period 3, Period 4 and, in calendar year 2021 only, Period 5 and Period 6.

“Period 4” means for each calendar year, the period beginning on and including the Settlement Date occurring in December of each calendar year, and ending on but not including, the Settlement Date occurring in July of the following calendar year; provided, however that in calendar year 2021 only, Period 4 shall not include Period 5 or Period 6.

“Period 6” means, for calendar year 2021 only, the period beginning on and including the March 26, 2021 and ending on but not including, the earlier of the Facility Termination Date or July 12, 2021.

SECTION 2. Conditions to Effectiveness. This Amendment shall become effective as of the date hereof, provided that neither the Facility Termination Date nor a Termination Event or Unmatured Termination Event has occurred and subject to (i) the payment of any fees, costs and expenses due and payable to each Purchaser Agent under the Amendment Fee Letter and (ii) the condition precedent that the Administrator shall have received each of the following, each duly executed and dated as of the date hereof (or such other date satisfactory to the Administrator), in form and substance satisfactory to the Administrator: (a) counterparts of this Amendment (whether by facsimile or otherwise) executed by each of the parties hereto and (b) counterparts of the Amendment Fee Letter (whether by facsimile or otherwise) executed by each of the respective parties thereto.

Each of the Seller and the Servicer, as applicable, hereby represents and warrants to each Purchaser, each Purchaser Agent and the Administrator as follows:

(a)Representations and Warranties. The representations and warranties contained in Exhibit III of the Agreement are true and correct as of the date hereof (unless stated to relate solely to an earlier date, in which case such representations or warranties were true and correct as of such earlier date).

(b)Enforceability. The execution and delivery by each of the Seller and the Servicer of this Amendment, and the performance of each of its obligations under this Amendment and the Agreement, as amended hereby, are (i) within each of its organizational powers and have been duly authorized by all necessary action on each of its parts, (ii) do not contravene or result in a default under or conflict with (A) its constitutional documents; (B) any law, rule or regulation applicable to it except where such contravention, default or conflict would not have a Material Adverse Effect; (C) any

indenture, loan agreement, mortgage, deed of trust or other material agreement or instrument to which it is a party or by which it is bound; or (D) any order, writ, judgment, award, injunction or decree binding on or affecting it or any of its property; and (iii) do not result in or require the creation of any Adverse Claim upon or with respect to any of its properties except under the Transaction Documents. This Amendment and the Agreement, as amended hereby, are each of the Seller’s and the Servicer’s valid and legally binding obligations, enforceable in accordance with its terms.

(c)No Default. Immediately after giving effect to this Amendment, the Amendment Fee Letter and the transactions contemplated hereby and thereby, no Termination Event or Unmatured Termination Event exists or shall exist and the Purchased Interest shall not exceed 100%.

SECTION 4. Effect of Amendment; Ratification. Except as specifically amended hereby, the Agreement is hereby ratified and confirmed in all respects, and all of its provisions shall remain in full force and effect. After this Amendment becomes effective, all references in the Agreement (or in any other Transaction Document) to “the Receivables Purchase Agreement”, “this Agreement”, “hereof”, “herein”, or words of similar effect, in each case referring to the Agreement, shall be deemed to be references to the Agreement as amended hereby. This Amendment shall not be deemed to expressly or impliedly waive, amend, or supplement any provision of the Agreement other than as specifically set forth herein.

SECTION 5. Reaffirmation of Performance Guaranty. After giving effect to this Amendment, the Amendment Fee Letter and each of the other transactions contemplated hereby and thereby, all of the provisions of the Performance Guaranty shall remain in full force and effect and Vistra hereby ratifies and affirms the Performance Guaranty and acknowledges that the Performance Guaranty has continued and shall continue in full force and effect in accordance with its terms.

SECTION 6. Counterparts. This Amendment may be executed in any number of counterparts (including in PDF or similar electronic format by facsimile or e-mail transmission), each of which, when so executed, shall be deemed to be an original, and all of which, when taken together, shall constitute one and the same agreement.

SECTION 7. Governing Law. THIS AMENDMENT SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK (WITHOUT REFERENCE TO ITS CONFLICTS OF LAW PROVISIONS (OTHER THAN §5- 1401 AND §5-1402 OF THE NEW YORK GENERAL OBLIGATIONS LAW, WHICH SHALL APPLY HERETO).

SECTION 8. Section Headings. The various headings of this Amendment are inserted for convenience only and shall not affect the meaning or interpretation of this Amendment or the Agreement or any provision hereof or thereof.

SECTION 9. Successors and Assigns. This Amendment shall be binding upon and shall inure to the benefit of the parties hereto and their respective successors and assigns.

SECTION 10. Severability. If any one or more of the agreements, provisions or terms of this Amendment shall for any reason whatsoever be held invalid or unenforceable, then such agreements, provisions or terms shall be deemed severable from the remaining agreements, provisions and terms of this Amendment and shall in no way affect the validity or enforceability of the provisions of this Amendment or the Agreement.

as Conduit Purchaser