CONFIRMING STATEMENT

This Confirming Statement ("Statement") confirms that the undersigned,
Yuki Whitmire, pursuant to her power and authority in her role as
attorney-in-fact for James A. Burke ("Reporting Person") granted by
that certain Confirming Statement entered into as of October 6, 2020,
hereby authorizes, directs and designates Daniela Gutierrez ("Designee"),
acting singly, to: (1) prepare, execute in the Reporting Person's name
and on the Reporting Person's behalf, and submit to the
U.S. Securities and Exchange Commission (the "SEC") a Form ID,
including amendments thereto, and any other documents necessary
or appropriate to obtain codes and passwords enabling the
undersigned to make electronic filings with the SEC of reports
required by Section 16(a) of the
Securities Exchange Act of 1934 ("Exchange Act")
or any rule or regulation of the SEC; (2) execute for and
on behalf of the Reporting Person, in the Reporting Person's
capacity as an officer and/or director of
Vistra Corp. (the "Company"), Forms 3, 4, and 5 in accordance
with Section 16(a) of the Exchange Act and the rules thereunder;
(3) do and perform any and all acts for and on
behalf of the Reporting Person which may be necessary or desirable to
complete and execute any such Form 3, 4, or 5, complete
and execute any amendment or amendments thereto, and timely file
such form with the SEC and any stock exchange or similar authority;
and (4) take any other action of any type whatsoever in connection
with the foregoing which, in the opinion of the Designee, may be of,
benefit to, in the best interest of, or legally required by,
the Reporting Person, it being understood that the documents
executed by the Designee on behalf of the Reporting Person
pursuant to this Statement shall be in such form and shall
contain such terms and conditions as the Designee
may approve in the Designee's discretion.

The undersigned, pursuant to her power and authority in her
role as attorney-in-fact for the Reporting Person, hereby
grants to the Designee full power and authority to do and
perform any and every act and thing whatsoever requisite,
necessary, or property to be done in the exercise of any of
the rights and powers granted under this Statement, as fully
to all intents and purposes as the Reporting Person might or
that the Designee, or the Designee's substitute or substitutes,
shall lawfully do or cause to be done by virtue of this
Statement and the rights and powers herein granted.
On behalf of the Reporting Person, the undersigned acknowledges
that the foregoing Designee, in serving in such capacity
on behalf of the Reporting Person, is not assuming, nor is the
Company assuming, any of the Reporting Person's responsibilities
to comply with Section 16 of the Exchange Act.

The authority of the Designee under this Statement shall
continue until the Reporting Person is no longer required to
file Forms 3, 4, and 5 with respect to the Reporting Person's
holdings of and/or transactions in securities of
the Company, unless earlier revoked by the Reporting Person,
or any attorney-in-fact, in a signed writing delivered to the Designee.

IN WITNESS WHEREOF, the undersigned has caused this
Statement to be executed as of this 26th day of
February, 2024.

    By: /s/ Yuki Whitmire, as attorney-in-fact for James. A Burke

    Name: Yuki Whitmire