Mistras Group (MG) Executive Chairman granted 40,000-share RSU award

Rhea-AI Filing Summary

Mistras Group Executive Chairman and director Manuel Stamatakis reported an equity grant from the company. On 01/02/2026, he acquired 40,000 shares of common stock at a price of $0, reported as an award of restricted stock units that will vest 100% on the first anniversary of the grant date. Following this transaction, he beneficially owns 424,299 shares of Mistras Group common stock in direct ownership. This Form 4/A is described as an amendment filed solely to correct an administrative error on the signature line, with no change to the reported award terms.

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^*

Stamatakis Manuel N.

(Last) (First) (Middle)

C/O MISTRAS GROUP, INC.

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)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Executive Chairman

3. Date of Earliest Transaction (Month/Day/Year)
01/02/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)
01/05/2026

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

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

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	01/02/2026		A		40,000(1)	A	$0	424,299	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 an award of restricted stock units that will vest 100% on the first anniversary date of the grant.

Remarks:

This amendment is being filed solely to correct an administrative error on the signature line.

	/s/ Laura Boswell, attorney-in-fact for Manuel Stamatakis	01/09/2026
	** 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.

FAQ

What insider transaction did Mistras Group (MG) report in this Form 4/A?

The filing reports that Executive Chairman and director Manuel Stamatakis acquired 40,000 shares of Mistras Group common stock as part of an equity award granted on 01/02/2026.

What are the terms of the 40,000-share award reported for Mistras Group (MG)?

The 40,000 shares represent an award of restricted stock units, which will vest 100% on the first anniversary of the grant date.

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

After the reported award, Manuel Stamatakis beneficially owns 424,299 shares of Mistras Group common stock in direct ownership.

Why is this filing labeled as an amended Form 4/A for Mistras Group (MG)?

The document states that the amendment is being filed solely to correct an administrative error on the signature line, without changing the transaction details.

Was cash paid for the 40,000 Mistras Group (MG) shares reported in the filing?

No cash was paid; the shares were acquired at a reported price of $0 as part of a restricted stock unit award.

What roles does the reporting person hold at Mistras Group (MG)?

The reporting person is identified as both a Director and an Officer, serving as Executive Chairman of Mistras Group.