Mistras Group insider withholds 2,699 shares for tax on RSU vesting

Mistras Group, Inc. reported an insider equity transaction by its Senior Executive Vice President and Chief Financial Officer.

Rhea-AI Filing Summary

Mistras Group, Inc. reported an insider equity transaction by its Senior Executive Vice President and Chief Financial Officer. On 01/05/2026, the officer had 2,699 shares of common stock withheld at a price of $12.65 per share to cover tax obligations arising from the vesting of restricted stock units. This did not represent an open-market sale.

Following this tax-withholding transaction, the reporting officer beneficially owned 119,021 shares of Mistras Group common stock, held directly.

Insider Trade Summary

Exercise Price or Tax Liability: 2,699 shares

Exercise Price or Tax Liability 1 txn

Insider Prajzner Edward J

Role Sr. EVP and CFO

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common Stock	2,699	$12.65	$34K

Holdings After Transaction: Common Stock — 119,021 shares (Direct)

Footnotes (1)

1. F1. Represents shares withheld for payment of tax liability as a result of the vesting of restricted stock units.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did Mistras Group (MG) disclose in this filing?

The filing shows that the Senior EVP and CFO had 2,699 shares of Mistras Group common stock withheld on 01/05/2026 to pay taxes due on the vesting of restricted stock units.

Was the Mistras Group (MG) insider transaction an open-market sale?

No. The filing explains that the 2,699 shares were withheld for payment of tax liability related to vesting restricted stock units, rather than sold in the open market.

At what price were the Mistras Group (MG) shares withheld for taxes?

The 2,699 shares of Mistras Group common stock were withheld at a price of $12.65 per share in connection with the tax payment.

How many Mistras Group (MG) shares does the reporting officer own after this transaction?

After the tax-withholding transaction, the reporting officer beneficially owned 119,021 shares of Mistras Group common stock directly.

What is the role of the insider involved in this Mistras Group (MG) transaction?

The reporting person is an officer of Mistras Group, serving as Senior Executive Vice President and Chief Financial Officer.

What type of equity award triggered the tax withholding at Mistras Group (MG)?

The tax withholding arose from the vesting of restricted stock units, as noted in the explanation of responses.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 01/05/2026 - 04:19 PM EST Learn about SEC filing dates

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^*

Prajzner Edward J

(Last) (First) (Middle)

C/O MISTRAS GROUP

195 CLARKSVILLE ROAD

(Street)

PRINCETON JUNCTION NJ 08550

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Mistras Group, Inc. [ MG ]

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Sr. EVP and CFO

3. Date of Earliest Transaction (Month/Day/Year)
01/05/2026

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	01/05/2026		F		2,699(1)	D	$12.65	119,021	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 shares withheld for payment of tax liability as a result of the vesting of restricted stock units.

	/s/ Laura Boswell, attorney-in-fact for Manuel N. Stamatakis J. Prajzner	01/05/2026
	** 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.