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 Kristopher E. Moldovan ("Reporting Person")
granted by that certain Power of Attorney entered into as of August 1, 2022,
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 Kristopher E. Moldovan

    Name: Yuki Whitmire