[8-K] Vistra Corp. Reports Material Event

Rhea-AI Filing Summary

Vistra Corp. filed an 8-K reporting a material event related to its credit arrangements. The filing references a Ninth Amendment to the Credit Agreement dated October 1, 2025 among Vistra Operations Company LLC (the borrower), Vistra Intermediate Company LLC (holdings), Citibank, N.A. (as Administrative Agent and Collateral Agent), and other lenders. The cover page notes interactive data embedded in the Inline XBRL document and the filing is signed by William M. Quinn, Senior Vice President and Treasurer, dated October 6, 2025.

Insights

Debt Markets Analyst

Ninth amendment to the credit agreement recorded; counterparties include Citibank and Vistra affiliates.

The filing identifies a Ninth Amendment to Vistra's credit agreement dated October 1, 2025, naming Vistra Operations Company LLC as borrower and Citibank, N.A. as Administrative and Collateral Agent. This documents a contractual change to the company’s borrowing arrangements.

Because the filing excerpt does not disclose amendment terms (maturity, covenants, pricing, or borrowing capacity), the investor impact cannot be assessed from the text provided.

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 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): October 1, 2025

VISTRA CORP.

(Exact name of registrant as specified in its charter)

Delaware		001-38086		36-4833255
(State or other jurisdiction of incorporation or organization)		(Commission File Number)		(I.R.S. Employer Identification No.)

6555 Sierra Drive Irving, TX		75039
(Address of principal executive offices)		(Zip Code)

(214) 812-4600

(Registrant’s telephone number, including area code)

N/A

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.l4a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240. 14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of Each Class		Trading Symbol(s)		Name of Each Exchange on Which Registered
Common stock, par value $0.01 per share		VST		New York Stock Exchange
Indicate by check mark				NYSE Texas

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company  ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 1.01. Entry into a Material Definitive Agreement.

On October 1, 2025, Vistra Operations Company LLC ( “Borrower”), an indirect, wholly owned subsidiary of Vistra Corp. (the “Company”), entered into an amendment (the “Credit Agreement Amendment”) to that certain credit agreement (as amended, including by the Credit Agreement Amendment, the “Commodity Linked Credit Agreement”), dated as of February 4, 2022, by and among Borrower, Vistra Intermediate Company LLC (“Vistra Intermediate”), Citibank, N.A., as administrative agent (in such capacity, the “Administrative Agent”) and collateral agent (in such capacity, the “Collateral Agent” and together with the Administrative Agent, the “Agent”), the financial institutions from time to time party thereto, as lenders (the “Lenders”) and letter of credit issuers, and the other parties party thereto.

Pursuant to the Credit Agreement Amendment, effective as of October 1, 2025, the Credit Agreement was amended to, among other things, (i) extend the Revolving Credit Maturity Date (as defined in the Commodity Linked Credit Agreement) from October 1, 2025 to September 30, 2026, (ii) modify the calculation of the Borrowing Base (as defined in the Commodity Linked Credit Agreement) and certain related definitions, and (ii) effect certain other conforming changes and modifications consistent with the foregoing.

The foregoing summary of the Credit Agreement Amendment does not purport to be complete and is subject to, and qualified in its entirety by, the full text of the Credit Agreement Amendment, a copy of which will be filed with the Company’s next periodic report.

Item 2.03 Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant.

The information contained in Item 1.01 of this Current Report concerning the Company’s direct financial obligations under the Credit Agreement Amendment is incorporated by reference herein.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

Exhibit No.		Description
10.1*		Ninth Amendment to Credit Agreement, dated as of October 1, 2025, among Vistra Operations Company LLC, as Borrower, Vistra Intermediate Company LLC, as Holdings, Citibank, N.A., as Administrative Agent and as Collateral Agent, and the other lenders party thereto
104		Cover Page Interactive Data File (embedded within the Inline XBRL document)

* Certain annexes and schedules to this exhibit have been omitted pursuant to Item 601(a)(5) of Regulation S-K. Vistra agrees to furnish supplementally a copy of any omitted annexes or schedule to the SEC upon its request.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

				Vistra Corp.
Dated: October 6, 2025				/s/ William M. Quinn
				Name:		William M. Quinn
				Title:		Senior Vice President and Treasurer

FAQ

What amendment did Vistra Corp. (VST) file in this 8-K?

The filing references the Ninth Amendment to the Credit Agreement dated October 1, 2025 among Vistra entities, Citibank, N.A., and other lenders.

Who are the named parties to the amendment in the Vistra 8-K?

The amendment names Vistra Operations Company LLC as borrower, Vistra Intermediate Company LLC as holdings, and Citibank, N.A. as Administrative Agent and Collateral Agent, plus other lenders.

When was the amendment executed and when was the 8-K signed?

The amendment is dated October 1, 2025 and the 8-K cover page is signed by William M. Quinn on October 6, 2025.

Does the filing disclose the financial terms of the amendment?

No. The excerpt provided does not include any financial terms, covenant changes, or borrowing capacity details.

Is interactive data available for this 8-K?

Yes. The cover page notes that an Interactive Data File is embedded within the Inline XBRL document.