Vistra (NYSE: VST) SVP and CAO sells 5,000 shares in open market

Rhea-AI Filing Summary

Vistra Corp. senior vice president and chief accounting officer Margaret Montemayor reported an open-market sale of 5,000 shares of Vistra common stock at $164.96 per share on May 27, 2026. After this transaction, she directly holds 14,360 Vistra common shares.

Insights

Insider trading analyst

SVP accounting officer makes a modest open-market share sale.

Margaret Montemayor, senior vice president and chief accounting officer of Vistra Corp., completed an open-market sale of 5,000 shares of common stock at $164.96 per share. The transaction is coded as an S, indicating a standard sale in the market.

Following the sale, she directly owns 14,360 shares of Vistra common stock. Based on this filing alone, the trade appears as a routine insider sale without accompanying option exercises, tax withholding, or derivative positions reported in this document.

Insider Trade Summary

Net Seller: 5,000 shares ($824,800)

Net Sell 1 txn

Insider Montemayor Margaret

Role SVP, Chief Accounting Officer

Sold 5,000 shs ($825K)

Type	Security	Shares	Price	Value
Sale	Common Stock	5,000	$164.96	$825K

Holdings After Transaction: Common Stock — 14,360 shares (Direct, null)

Footnotes (1)

Key Figures

Shares sold: 5,000 shares Sale price: $164.96 per share Shares held after transaction: 14,360 shares

3 metrics

Shares sold 5,000 shares Open-market sale of Vistra common stock

Sale price $164.96 per share Price for the 5,000 shares sold

Shares held after transaction 14,360 shares Direct ownership after sale

Key Terms

open-market sale, Common Stock, Form 4

3 terms

open-market sale financial

"the shares were sold in an open-market transaction at $164.96 per share"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Common Stock financial

"Vistra common stock sold at an average price of $164.96 per share"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

Form 4 regulatory

"according to a Form 4 insider trading filing"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

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Form 4 Insider Transactions: What Each Field Means →

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

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

Montemayor Margaret

(Last) (First) (Middle)

6555 SIERRA DRIVE

(Street)

IRVING TEXAS 75039

(City) (State) (Zip)

UNITED STATES

(Country)

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)
	SVP, Chief Accounting Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/27/2026

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

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

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

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	05/27/2026		S		5,000	D	$164.96	14,360	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:

Remarks:

	/s/ Daniela Gutierrez, as Attorney-in-Fact	05/29/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did Vistra Corp. (VST) report for Margaret Montemayor?

Vistra Corp. reported that senior vice president and chief accounting officer Margaret Montemayor sold 5,000 shares of common stock. The shares were sold in an open-market transaction at $164.96 per share, according to a Form 4 insider trading filing.

At what price were the Vistra Corp. (VST) shares sold in the latest Form 4?

The reported transaction shows Vistra common stock sold at an average price of $164.96 per share. This price applies to 5,000 shares sold in an open-market transaction by senior vice president and chief accounting officer Margaret Montemayor.

How many Vistra Corp. (VST) shares does Margaret Montemayor hold after the sale?

After selling 5,000 shares, Margaret Montemayor directly holds 14,360 shares of Vistra common stock. This post-transaction holding reflects her remaining direct ownership as disclosed in the Form 4 insider trading report.

What type of insider transaction did Vistra Corp. (VST) disclose in this Form 4?

The transaction is classified as an open-market sale of common stock, coded S on the Form 4. This indicates shares were sold in the market rather than through option exercises, gifts, or tax-withholding related transactions.

Does the Vistra Corp. (VST) Form 4 show any derivative securities for Margaret Montemayor?

The Form 4 data lists no derivative securities or option exercises for Margaret Montemayor. The filing only reports a single non-derivative transaction involving the open-market sale of 5,000 shares of Vistra common stock.