Exhibit 4.1

EXECUTION VERSION

SIXTEENTH AMENDMENT TO RECEIVABLES PURCHASE AGREEMENT

This SIXTEENTH AMENDMENT (this “Amendment”), dated as of July 11, 2025, 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 (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).

R E C I T A L S

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 an Amended and Restated Purchaser Group Fee Letter (the “Fee Letter”); and

WHEREAS, the parties hereto desire to amend the Agreement as hereinafter set forth.

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

A G R E E M E N T

SECTION 1. Rebalancing of Commitment Percentages. In connection with the changes in the respective Commitment Percentages of the Purchasers resulting from the amendments contemplated hereby, the Seller shall be deemed to have requested a non-ratable reduction of Capital from each Assigning Purchaser and a non-ratable Purchase from each Assignee Purchaser, in amounts with respect to each Assigning Purchaser and Assignee Purchaser, as applicable, such that, after giving effect to such reductions and Purchases, the outstanding aggregate Capital of each Purchaser Group shall be equal to such Purchaser Group’s Group Commitment Percentage (after giving effect to the adjustments set forth on Schedule VI attached hereto, as applicable) times the Aggregate Capital. For administrative convenience, the Seller may instruct Assignee Purchasers to fund the foregoing Purchases by paying the proceeds thereof directly to the Assigning Purchasers as the foregoing reduction in Capital of the Assigning Purchasers on the Seller’s behalf and such Assignee Purchasers shall fund such rebalancing Purchases to the Assigning Purchasers regardless of whether the conditions precedent to a Purchase set forth in Exhibit II to the Agreement or otherwise in the Agreement are satisfied. For purposes of this Section 1 the following terms shall have the following meanings:

“Assignee Purchaser” means a Purchaser whose Group Commitment Percentage (after giving effect to such adjustments occurring on the date hereof, as applicable) times the Aggregate Capital exceeds the outstanding aggregate Capital of such Purchaser Group at such time.

“Assigning Purchaser” means a Purchaser whose Group Commitment Percentage (after giving effect to such adjustments occurring on the date hereof, as applicable) times the Aggregate Capital is less than the outstanding aggregate Capital of such Purchaser Group at such time.

SECTION 2. Amendments to the Agreement. The Agreement is hereby amended as follows:

2.1 The definition of “Facility Termination Date” set forth in Exhibit I of the Agreement is amended by deleting the date “July 11, 2025” where it appears therein and replacing it with “July 10, 2026”.

2.2 The definition of “Settlement Date” set forth in Exhibit I of the Agreement is amended and restated as follows:

“Settlement Date” means for any Settlement Period, (a) the day of the following calendar month that is two (2) Business Days following the date the Information Package is delivered pursuant to Exhibit IV, Section 2(j)(ii), provided, for the avoidance of doubt, that the Settlement Date for the July 2025 Settlement Period shall be September 4, 2025, and (b) on and after the Facility Termination Date, each other day selected from time to time by the Administrator (it being understood that the Administrator may select such Settlement Date to occur as frequently as daily).

2.3 Section 2(j)(ii) of Exhibit IV is hereby amended and restated as follows:

(ii) as soon as available and in any event not later than the seventeenth (17th) calendar day of the month (or, if such day is not a Business Day, on the next succeeding Business Day), an Information Package as of the most recently completed Settlement Period; provided, however, with respect to the July 2025 Settlement Period, such Information Package shall be delivered no later than September 2, 2025;

2.4 Schedule VI of the Agreement is hereby deleted in its entirety and replaced with Schedule VI attached hereto.

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SECTION 3. 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 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) by each of the parties hereto or thereto, in form and substance satisfactory to the Administrator:

(a) counterparts of this Amendment (whether by facsimile or otherwise);

(b) counterparts of the Fee Letter (whether by facsimile or otherwise) executed by each of the respective parties thereto; and

(c) such other documents, agreement, certificates, opinions and instruments as the Administrator may reasonably request prior to delivery by Administrator of an executed counterpart of this Amendment, including, without limitation, opinions of counsel for the Seller and the Servicer, each dated as of the date hereof and addressed to the Purchasers and the Administrator, from: (A) Sidley Austin LLP, with respect to enforceability of agreements; no conflicts with law, other agreements or organic documents; and other customary corporate opinions and (B) Vistra, with respect to enforceability of agreements; no conflicts with law, other agreements or organic documents; and other customary corporate opinions.

SECTION 4. Representations and Warranties.

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 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%.

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(d) Funding Deficiency. To the knowledge of the Seller and the Servicer, no Funding Deficiency exists as of the date hereof.

SECTION 5. 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 6. Reaffirmation of Performance Guaranty. After giving effect to this Amendment, the 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 7. 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 8. 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 9. 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 10. 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 11. 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.

[SIGNATURE PAGES FOLLOW]

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IN WITNESS WHEREOF, the parties have executed this Amendment as of the date first written above.

[Signature Page to Sixteenth Amendment to RPA]

[Signature Page to Sixteenth Amendment to RPA]

[Signature Page to Sixteenth Amendment to RPA]

[Signature Page to Sixteenth Amendment to RPA]

[Signature Page to Sixteenth Amendment to RPA]

SCHEDULE VI

COMMITMENTS

Schedule VI

Exhibit 10.1

EXECUTION VERSION

AMENDMENT NO. 6 TO MASTER FRAMEWORK AGREEMENT

This AMENDMENT NO. 6 TO MASTER FRAMEWORK AGREEMENT (this “Amendment”), is made and entered into as of July 11, 2025 (the “Amendment Date”), by and among each of:

(A) MUFG Bank, Ltd., a Japanese banking corporation (“MUFG”), as buyer (“Buyer”);

(B) TXU Energy Retail Company LLC, a Texas limited liability company (“TXU”), as seller (the “Seller”);

(C) each originator party hereto (each, an “Originator”; and together with the Seller, each a “Seller Party” and collectively, the “Seller Parties”);

(D) TXU, as agent for the Seller Parties (in such capacity, the “Seller Party Agent”); and

(E) solely with respect to Section 4.4 hereof, Vistra Operations Company LLC, as guarantor (the “Guarantor”),

and amends that certain Master Framework Agreement dated as of October 9, 2020, by and among Buyer, the Seller, the Originators and the Seller Party Agent (as amended, supplemented or modified prior to the date hereof, the “Framework Agreement” and, as amended hereby, the “Amended Framework Agreement”). Each of Buyer, the Seller, each Originator and the Seller Party Agent may also be referred to herein individually as a “Party”, and collectively as the “Parties”.

RECITALS

WHEREAS, the Parties entered into the Framework Agreement and certain other Transaction Agreements for the purpose of providing the Seller with a facility under which Buyer will enter into certain sale and repurchase agreements with the Seller with respect to the Seller Note;

WHEREAS, Guarantor entered into a Guaranty in favor of Buyer pursuant to which Guarantor guaranteed the payment and performance of all obligations, liabilities and indebtedness owed by each Seller Party under the Transaction Agreements; and

WHEREAS, the Parties now wish to extend the Facility Term and amend certain other provisions of the Framework Agreement.

AGREEMENT

NOW, THEREFORE, in consideration of the mutual covenants, agreements and conditions set forth herein, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged and confirmed, the Parties and, solely for purposes of Section 4.4 of this Amendment, the Guarantor agree as follows:

1. Interpretation.

1.1 Definitions. All capitalized terms used but not defined in this Amendment shall have the meanings set forth in the Framework Agreement (including Schedule 1 thereto).

1.2 Construction. The rules of construction set forth in Section 1.2 of the Framework Agreement shall apply to this Amendment.

2. Amendment. Effective from and after the Amendment Date, the definition of “Scheduled Facility Expiration Date” set forth in Schedule 1 to the Framework Agreement is hereby amended by replacing the date “July 11, 2025” where it appears therein with the date “July 10, 2026”.

3. Representations, Warranties, Undertakings and Agreements.

3.1 Seller Party. In entering into this Amendment, each Seller Party represents to Buyer that each of the representations and warranties of such Seller Party (as applicable) set forth in the Framework Agreement and each other Transaction Agreement to which such Seller Party is a party are true and correct in all material respects (except that any representation or warranty that is subject to any materiality qualification is true and correct in all respects) as of the Amendment Date (unless such representation or warranty relates to an earlier date, in which case as of such earlier date).

4. Miscellaneous.

4.1 Counterparts. This Amendment may be executed by the Parties on any number of separate counterparts, by email, and all of those counterparts taken together will be deemed to constitute one and the same instrument; signature pages may be detached from multiple separate counterparts and attached to a single counterpart so that all signatures are physically attached to the same document. The words “execution,” “signed,” “signature,” and words of like import in this Amendment shall include images of manually executed signatures transmitted by facsimile or other electronic format (including, without limitation, “pdf”, “tif” or “jpg”) and other electronic signatures (including, without limitation, DocuSign and AdobeSign). The use of electronic signatures and electronic records (including, without limitation, any contract or other record created, generated, sent, communicated, received, or stored by electronic means) shall be of the same legal effect, validity and enforceability as a manually executed signature or use of a paper-based record-keeping system to the fullest extent permitted by applicable Law, including the Federal Electronic Signatures in Global and National Commerce Act, the New York State Electronic Signatures and Records Act and any other applicable Law, including, without limitation, any state law based on the Uniform Electronic Transactions Act or the Uniform Commercial Code.

4.2 [Reserved].

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4.3 Ratification and Amendment to Transaction Agreements. Except as amended hereby, each of the other Transaction Agreements remains in full force and effect. The Parties hereby acknowledge and agree that, effective from and after the Amendment Date, (i) all references to the Framework Agreement in any other Transaction Agreement shall be deemed to be references to the Amended Framework Agreement, (ii) any amendment in this Amendment of a defined term in the Framework Agreement shall apply to terms in any other Transaction Agreement which are defined by reference to the Framework Agreement, and (iii) this sentence shall be effective to amend each of the relevant Transaction Agreements (including the Master Repurchase Agreement and each Annex thereto) to the extent necessary to give effect to the foregoing clauses (i) and (ii).

4.4 Guarantor Acknowledgment and Consent. The Guarantor hereby acknowledges the Parties’ entry into this Amendment and consents to the terms and conditions hereof, it being understood that such terms and conditions may affect the extent of the Guaranteed Obligations (as defined in the Guaranty) for which the Guarantor may be liable under the Guaranty. The Guarantor further confirms and agrees that the Guaranty remains in full force and effect after giving effect to this Amendment and, for the avoidance of doubt, acknowledges that any amendment herein to a defined term in the Framework Agreement shall apply to terms in the Guaranty which are defined by reference to the Framework Agreement.

4.5 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)).

4.6 Expenses. All reasonable and documented legal fees and expenses of Buyer incurred in connection with the preparation, negotiation, execution and delivery of this Amendment and each related document entered into in connection herewith shall be paid by the Seller promptly on demand.

[SIGNATURE PAGES FOLLOW]

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IN WITNESS WHEREOF, the Parties have executed this Amendment as of the date first written above.

[SIGNATURE PAGES CONTINUE ON FOLLOWING PAGE]

[Signature Page to Amendment No. 6 to Master Framework Agreement]

IN WITNESS WHEREOF, the Parties have executed this Amendment as of the date first written above.

[SIGNATURE PAGES CONTINUE ON FOLLOWING PAGE]

[Signature Page to Amendment No. 6 to Master Framework Agreement]

IN WITNESS WHEREOF, the Parties have executed this Amendment as of the date first written above.

[Signature Page to Amendment No. 6 to Master Framework Agreement]

[SIGNATURE PAGES CONTINUE ON FOLLOWING PAGE]

[Signature Page to Amendment No. 6 to Master Framework Agreement]

IN WITNESS WHEREOF, Guarantor has executed this Amendment (as of the date first written above.

[SIGNATURE PAGES CONTINUE ON FOLLOWING PAGE]

[Signature Page to Amendment No. 6 to Master Framework Agreement]