Vistra (NYSE: VST) EVP granted shares; stock withheld to cover taxes

Rhea-AI Filing Summary

Vistra Corp. executive vice president and general counsel Stephanie Zapata Moore reported equity compensation activity in company common stock. On February 24, 2026, she acquired 79,444 shares of common stock valued at $171.62 per share in connection with performance-based restricted stock units for the three-year period ended December 31, 2025, after performance was certified by the board committee.

On the same date, 30,416 shares and 4,264 shares of common stock were disposed of at $171.62 per share through tax-withholding transactions tied to the vesting of performance-based and time-based restricted stock units. These tax-withholding amounts and timing were determined by award terms rather than by the reporting person. After these transactions, she directly held 121,016 shares of Vistra common stock.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Moore Stephanie Zapata

(Last) (First) (Middle)

6555 SIERRA DRIVE

(Street)

IRVING TX 75039

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Vistra Corp. [ VST ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP and General Counsel

3. Date of Earliest Transaction (Month/Day/Year)
02/24/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	02/24/2026		A(1)		79,444	A	$171.62	155,696	D
Common Stock	02/24/2026		F(2)		30,416	D	$171.62	125,280	D
Common Stock	02/24/2026		F(3)		4,264	D	$171.62	121,016	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents performance-based restricted stock units for which the applicable performance criteria for the three-year period ended December 31, 2025 was certified by the Issuer's Social Responsibility and Compensation Committee of the Board of Directors as of February 18, 2026.

2. This transaction represents the withholding by the Issuer of shares to pay taxes in connection with the vesting of performance-based restricted stock units. The timing and amount of the transaction were determined by the terms of the applicable performance-based restricted stock unit award and were not within the control of the Reporting Person.

3. This transaction represents the withholding by the Issuer of shares to pay taxes in connection with the vesting of restricted stock units. The timing and amount of the transaction were determined by the terms of the applicable restricted stock unit award and were not within the control of the Reporting Person.

Remarks:

	/s/ Daniela Gutierrez, as Attorney-in-Fact	02/26/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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FAQ

What insider transactions did Vistra (VST) report for Stephanie Zapata Moore?

Vistra reported that EVP and General Counsel Stephanie Zapata Moore received a stock grant and had shares withheld for taxes. The filing shows one equity award acquisition and two tax-withholding dispositions, all in Vistra common stock on February 24, 2026.

How many Vistra (VST) shares did Stephanie Zapata Moore acquire in the latest Form 4?

Stephanie Zapata Moore acquired 79,444 shares of Vistra common stock at $171.62 per share. These shares relate to performance-based restricted stock units for the three-year period ending December 31, 2025, after the issuer’s committee certified the applicable performance criteria.

Were any of Stephanie Zapata Moore’s Vistra (VST) share dispositions open-market sales?

The reported share dispositions were not open-market sales. They were coded as F transactions, representing shares withheld by Vistra to pay taxes owed upon vesting of performance-based and time-based restricted stock unit awards, with timing and amounts set by award terms.

How many Vistra (VST) shares were withheld for Stephanie Zapata Moore’s taxes?

Vistra withheld 30,416 shares and 4,264 shares of common stock at $171.62 per share to cover tax obligations. According to the footnotes, these withholdings were automatically determined by the terms of the underlying restricted stock unit awards, not by discretionary trading decisions.

What is Stephanie Zapata Moore’s Vistra (VST) shareholding after these Form 4 transactions?

After the reported grant and tax-withholding transactions, Stephanie Zapata Moore directly held 121,016 shares of Vistra common stock. This post-transaction holding reflects her remaining equity position following the automatic share withholdings used to satisfy tax liabilities on vested awards.

What performance period was tied to Stephanie Zapata Moore’s Vistra (VST) stock award?

The stock award relates to performance-based restricted stock units covering a three-year period ending December 31, 2025. The issuer’s Social Responsibility and Compensation Committee certified the applicable performance criteria on February 18, 2026, triggering the share issuance reported.