    <SEC-DOCUMENT>0001140361-23-017900-index.html : 20230412
    <SEC-HEADER>0001140361-23-017900.hdr.sgml : 20230412
    <ACCEPTANCE-DATETIME>20230412083136
    ACCESSION NUMBER:		0001140361-23-017900
    CONFORMED SUBMISSION TYPE:	DEFA14A
    PUBLIC DOCUMENT COUNT:		3
    FILED AS OF DATE:		20230412
    DATE AS OF CHANGE:		20230412

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			Mistras Group, Inc.
    		CENTRAL INDEX KEY:			0001436126
    		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-ENGINEERING SERVICES [8711]
    		IRS NUMBER:				223341267
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		DEFA14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-34481
    		FILM NUMBER:		23814700

    	BUSINESS ADDRESS:
    		STREET 1:		195 CLARKSVILLE ROAD
    		CITY:			PRINCETON JUNCTION
    		STATE:			NJ
    		ZIP:			08550
    		BUSINESS PHONE:		609-716-4000

    	MAIL ADDRESS:
    		STREET 1:		195 CLARKSVILLE ROAD
    		CITY:			PRINCETON JUNCTION
    		STATE:			NJ
    		ZIP:			08550
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEFA14A
    <SEQUENCE>1
    <FILENAME>ny20006941x501_defa14a.htm
    <DESCRIPTION>FORM DEFA14A
    <TEXT>
    Document 1 - file: ny20006941x501_defa14a.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>ny20006941x501_nc1.jpg
    <TEXT>
    Document 2 - file: ny20006941x501_nc1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>ny20006941x501_nc2.jpg
    <TEXT>
    Document 3 - file: ny20006941x501_nc2.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>