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).

1. Name and Address of Reporting Person* Vahaviolos Sotirios J. (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 X 10% Owner X Officer (give title below) Other (specify below) Executive Chairman
	3. Date of Earliest Transaction (Month/Day/Year) 06/01/2020
	4. If Amendment, Date of Original Filed (Month/Day/Year) 06/02/2020	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	06/01/2020		F		2,867(1)	D	$4.04	10,428,130	D
Common Stock	06/01/2020		F		7,378(2)	D	$4.04	10,430,997	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, which was not included in the original report due to an administrative error.

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

Remarks:

This amendment is being filed to amend the original Form 4 to report an additional 2,867 shares that were withheld to pay withholding taxes upon the vesting of restricted stock units, but were not included in the original Form 4 due to an administrative error. The Schedule 13G (Amendment No. 11) filed by the reporting person on February 11, 2021 correctly reported his share ownership (taking into account the 2,867 shares withheld but not previously reported on the Form 4).

	Michael C. Keefe, attorney-in-fact for Sotirios J. Vahaviolos	01/10/2022
	** 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).
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