MG / Mistras Group, Inc. - SEC-arkiveringar, Årsredovisning, Fullmaktsutlåtande

Mistras Group, Inc.
US ˙ NYSE ˙ US60649T1079

Grundläggande statistik
LEI 5493000CMNXVLND3FU73
CIK 1436126
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to Mistras Group, Inc.
SEC Filings (Chronological Order)
Denna sida innehåller en komplett, kronologisk lista över SEC-arkiveringar, exklusive ägande-arkiveringar som vi tillhandahåller på andra ställen.
August 11, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2025 Or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001

August 6, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 6, 2025 Mistras Group, Inc

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 6, 2025 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incor

August 6, 2025 EX-99.1

MISTRAS Announces Second Quarter and First Half 2025 Results Robust Quarterly Organic Revenue Growth in Aerospace & Defense and Industrial Markets, with a Significant Expansion in quarter-over-quarter Gross Profit Margin of 200 basis points, Generati

Exhibit 99.1 MISTRAS Announces Second Quarter and First Half 2025 Results Robust Quarterly Organic Revenue Growth in Aerospace & Defense and Industrial Markets, with a Significant Expansion in quarter-over-quarter Gross Profit Margin of 200 basis points, Generating Net Income of $3.0 million, and Achieving Adjusted EBITDA of $24.1 million for the Second Quarter of 2025 PRINCETON JUNCTION, N.J., Au

June 12, 2025 CORRESP

June 12, 2025

June 12, 2025 Division of Corporation Finance U.S. Securities and Exchange Commission ATTN: Valeria Franks and Keira Nakada Washington, D.C. 20459 Re: Mistras Group, Inc. Form 10-K for Fiscal Year Ended December 31, 2024 Annual Report to Security Holders for Fiscal Year Ended December 31, 2024 Correspondence letter dated June 11, 2025 File No. 001-34481 Ladies and Gentlemen: Mistras Group, Inc. (t

June 2, 2025 CORRESP

June 2, 2025

June 2, 2025 Division of Corporation Finance U.S. Securities and Exchange Commission ATTN: Valeria Franks and Keira Nakada Washington, D.C. 20459 Re: Mistras Group, Inc. Form 10-K for Fiscal Year Ended December 31, 2024 Annual Report to Security Holders for Fiscal Year Ended December 31, 2024 File No. 001-34481 Ladies and Gentlemen: Mistras Group, Inc. (the “Company”) is in receipt of your letter

May 30, 2025 EX-1.01

Exhibit 1.01 — Conflict Minerals Report as required by Items 1.01 and 1.02 of this Form

Exhibit 1.01 Conflict Minerals Report of Mistras Group, Inc. in Accordance with Rule 13p-1 under the Securities Exchange Act of 1934 This is the Conflict Minerals Report of Mistras Group, Inc. (“Mistras”) for calendar year 2024 in accordance with Rule 13p-1 (“Rule 13p-1”) under the Securities Exchange Act of 1934 (the “1934 Act”). Please refer to Rule 13p-1, Form SD and the 1934 Act Release No. 34

May 30, 2025 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM SD Specialized Disclosure Report Mistras Group, Inc. (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM SD Specialized Disclosure Report Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001- 34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incorporation) File Number) Identification No.) 195 Clarksville Road Princeton Junction, New Jersey 8550 (Address of principal

May 23, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 19, 2025 Mistras Group, Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 19, 2025 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incorpo

May 9, 2025 EX-10.1

Stock Option Award Agreement between the registrant and Manuel Stamatakis dated January 6, 2025

MISTRAS GROUP, INC. OPTION AWARD AGREEMENT This Option Award Agreement (this “Award Agreement”), effective as of the Date of Grant set forth below, represents the grant of an option (the “Option”) to purchase shares of common stock, par value $.01 per share (“Common Stock”), of Mistras Group, Inc. (the “Company”) to Manuel N. Stamatakis (the “Participant”), subject to the terms and conditions set

May 9, 2025 EX-18.1

Independent Registered Public Accounting Firm

May 9, 2025 Board of Directors Mistras Group, Inc. 195 Clarksville Road Princeton Junction, New Jersey 08550 Dear Directors: We are providing this letter to you for inclusion as an exhibit to Mistras Group Inc.’s (the “Company”) Quarterly Report on Form 10-Q for the period ended March 31, 2025 (the “Form 10-Q”) pursuant to Item 601 of Regulation S-K. We have been provided a copy of the Company’s F

May 9, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2025 Or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 00

May 8, 2025 EX-99.1

MISTRAS Announces First Quarter 2025 Results Reinvigorated senior leadership with recently on-boarded, high-caliber positions with proven industry experience, to focus on delivering value to customers Integrated Data Solutions capabilities for custom

Exhibit 99.1 MISTRAS Announces First Quarter 2025 Results Reinvigorated senior leadership with recently on-boarded, high-caliber positions with proven industry experience, to focus on delivering value to customers Integrated Data Solutions capabilities for customers worldwide combining data-centric services, software solutions, and technology, to evolve a scalable, full life cycle asset protection

May 8, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 7, 2025 Mistras Group, Inc. (

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 7, 2025 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incorpor

April 9, 2025 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Information Required in Proxy Statement SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Information Required in Proxy Statement   SCHEDULE 14A INFORMATION   Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant  ☐ Check the appropriate box:  ☐  Preliminary Proxy Statement  

April 9, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Information Required in Proxy Statement SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Information Required in Proxy Statement SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of

March 11, 2025 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 001-34481 Mistras Group, Inc. (Exact

March 11, 2025 EX-21.1

Subsidiaries of the Registrant

Exhibit 21.1 The following is a list of subsidiaries of the registrant. The list omits some subsidiaries which, in the aggregate, would not constitute a significant subsidiary. Name Jurisdiction of Organization Assistances Controles Technologies France Controles Industriels de L'entang France GMA Aeronautica S.L.U. Germany GMA Holding B.V. The Netherlands GMA Werkstoffprufung GmbH Germany Mistras

March 11, 2025 EX-10.10

Mistras Group, Inc. Executive Severance Plan adopted on December 4, 2024

MISTRAS GROUP, INC. EXECUTIVE SEVERANCE PLAN Introduction Due to the competitive nature of the asset integrity business and the need for executive talent in the industry, executives of Mistras Group, Inc. (“Mistras”) and its subsidiaries (Mistras and its subsidiaries are collectively referred to as the “Company”) have been and will continue to be recruited by other companies. In order to attract a

March 11, 2025 EX-97.1

Incentive Compensation Recoupment Policy

MISTRAS GROUP, INC. INCENTIVE COMPENSATION RECOUPMENT POLICY Incentive Compensation Recoupment Policy (this “Policy”) adopted by the Compensation Committee (the “Compensation Committee”) of the Board of Directors (the “Board”) of Mistras Group, Inc. (the “Company”) on October 24, 2023 (the “Effective Date”). 1.Purpose. The purpose of this Policy is to provide for the recoupment of certain incentiv

March 11, 2025 EX-19.1

Insider Trading Compliance Policy

MISTRAS GROUP, INC. INSIDER TRADING COMPLIANCE POLICY All directors, officers and employees (“Insiders”) of Mistras Group, Inc. and its subsidiaries (collectively, the “Company”) are subject to the provisions of this Insider Trading Compliance Policy (the “Policy”). Any questions regarding this Policy and related procedures should be directed to Michael Keefe, Executive Vice President, General Cou

March 5, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 5, 2025 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incorp

March 5, 2025 EX-99.1

MISTRAS Announces Fourth Quarter and Full Year 2024 Results Full year 2024 Revenue Growth of 3.4%, Net Income increased 208.6% to $19.0 million Full year 2024 Adjusted EBITDA (non-GAAP) of $82.5 million, an increase of 25.3% Full year 2024 Net Cash f

Exhibit 99.1 MISTRAS Announces Fourth Quarter and Full Year 2024 Results Full year 2024 Revenue Growth of 3.4%, Net Income increased 208.6% to $19.0 million Full year 2024 Adjusted EBITDA (non-GAAP) of $82.5 million, an increase of 25.3% Full year 2024 Net Cash from Operations of $50.1 million, an increase of 87.4%; Free Cash Flow (non-GAAP) of $27.1 million, an increase of 775.9% Full year 2024 S

February 13, 2025 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 7, 2025 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of inc

February 7, 2025 8-K

Regulation FD Disclosure

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 6, 2025 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of inc

February 7, 2025 EX-99.1

MISTRAS Group Mourns the Passing of Founder & Chairman Emeritus Dr. Sotirios J. Vahaviolos

MISTRAS Group Mourns the Passing of Founder & Chairman Emeritus Dr. Sotirios J. Vahaviolos PRINCETON JUNCTION, N.J., February 6, 2025 (GLOBENEWSWIRE) – The Board of Directors of MISTRAS Group, Inc. (NYSE: MG) is deeply saddened to announce the passing of Dr. Sotirios J. Vahaviolos, the company’s Founder, Chairman Emeritus, and Board Director, on Thursday, February 6, 2025. A visionary leader and p

January 2, 2025 8-K/A

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K/A CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 5, 2024 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of i

January 2, 2025 EX-10.2

Form of Stock Option Award Agreement between the Company and Manuel Stamatakis

MISTRAS GROUP, INC. OPTION AWARD AGREEMENT This Option Award Agreement (this “Award Agreement”), effective as of the Date of Grant set forth below, represents the grant of an option (the “Option”) to purchase shares of common stock, par value $.01 per share (“Common Stock”), of Mistras Group, Inc. (the “Company”) to Manuel N. Stamatakis (the “Participant”), subject to the terms and conditions set

January 2, 2025 EX-10.1

Employment Agreement between the registrant and Edward Prajzner dated December 31, 2024 (filed as exhibit 10.1 to Current Report on Form 8-K filed on January 2, 2025, and incorporated herein by reference)

EMPLOYMENT AGREEMENT This Employment Agreement (the “Agreement”) is dated as of January 1, 2025 (the “Effective Date”) by and between Mistras Group, Inc.

January 2, 2025 EX-10.1

Employment Agreement dated December 31, 2024 between the Company and Manuel Stamatakis

EMPLOYMENT AGREEMENT This Employment Agreement (the “Agreement”) is entered into on December 31, 2024 between Mistras Group, Inc.

January 2, 2025 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 31, 2024 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of in

December 16, 2024 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 12, 2024 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of in

December 16, 2024 EX-99.1

MISTRAS Group Appoints Hani Hammad as Chief Operating Officer (COO)

Exhibit 99.1 MISTRAS Group Appoints Hani Hammad as Chief Operating Officer (COO) PRINCETON JUNCTION, N.J. – DECEMBER 12th, 2024 (GLOBE NEWSWIRE) – MISTRAS Group, Inc. (NYSE: MG)—a leading "one source" multinational provider of integrated technology-enabled asset protection solutions, is pleased to announce the appointment of Hani Hammad as the Company’s Chief Operating Officer (COO), effective Jan

December 5, 2024 EX-99.1

MISTRAS GROUP APPOINTS NATALIA SHUMAN AS PRESIDENT AND CHIEF EXECUTIVE OFFICER Manuel (Manny) N. Stamatakis Continues as Executive Chairman of the Board

Exhibit 99.1 MISTRAS GROUP APPOINTS NATALIA SHUMAN AS PRESIDENT AND CHIEF EXECUTIVE OFFICER Manuel (Manny) N. Stamatakis Continues as Executive Chairman of the Board PRINCETON JUNCTION, N.J. – December 5th, 2024 (GLOBE NEWSWIRE) – MISTRAS Group, Inc. (NYSE: MG)—a leading "one source" multinational provider of integrated technology-enabled asset protection solutions—today announced that the Company

December 5, 2024 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

8-K 1 ceoappointment-form8xkdisc.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 5, 2024 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other juri

December 5, 2024 EX-10.1

Employment Agreement between the registrant and Natalia Shuman-Fabbri dated December 5, 2024 (filed as exhibit 10.1 to Current Report on Form 8-K filed on December 5, 2024, and incorporated herein by reference)

[Execution] EMPLOYMENT AGREEMENT This Employment Agreement (the “Agreement”) is entered into on December 5, 2024 between Mistras Group, Inc.

November 4, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2024 Or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file numbe

October 30, 2024 8-K

Termination of a Material Definitive Agreement, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 30, 2024 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of inc

October 30, 2024 EX-99.1

MISTRAS Announces Third Quarter 2024 Results Quarterly Revenue Growth of 1.9%, driven by continued strong growth in the International segment Quarterly Net Income of $6.4 million, or $0.20 per diluted share Quarterly Adjusted EBITDA (non-GAAP) of $23

Exhibit 99.1 MISTRAS Announces Third Quarter 2024 Results Quarterly Revenue Growth of 1.9%, driven by continued strong growth in the International segment Quarterly Net Income of $6.4 million, or $0.20 per diluted share Quarterly Adjusted EBITDA (non-GAAP) of $23.3 million, an increase of 11.5% PRINCETON JUNCTION, N.J., October 30, 2024 (GLOBE NEWSWIRE) - MISTRAS Group, Inc. (MG: NYSE), a leading

October 30, 2024 EX-99.1

MISTRAS Announces Third Quarter 2024 Results Quarterly Revenue Growth of 1.9%, driven by continued strong growth in the International segment Quarterly Net Income of $6.4 million, or $0.20 per diluted share Quarterly Adjusted EBITDA (non-GAAP) of $23

Exhibit 99.1 MISTRAS Announces Third Quarter 2024 Results Quarterly Revenue Growth of 1.9%, driven by continued strong growth in the International segment Quarterly Net Income of $6.4 million, or $0.20 per diluted share Quarterly Adjusted EBITDA (non-GAAP) of $23.3 million, an increase of 11.5% PRINCETON JUNCTION, N.J., October 30, 2024 (GLOBE NEWSWIRE) - MISTRAS Group, Inc. (MG: NYSE), a leading

October 30, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 30, 2024 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of inc

September 18, 2024 EX-10.1

Mistras Group, Inc. Executive Severance Plan

MISTRAS GROUP, INC. EXECUTIVE SEVERANCE PLAN Introduction Due to the competitive nature of the asset integrity business and the need for executive talent in the industry, executives of Mistras Group, Inc. (“Mistras”) and its subsidiaries (Mistras and its subsidiaries are collectively referred to as the “Company”) have been and will continue to be recruited by other companies. In order to attract a

September 18, 2024 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 18, 2024 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of i

August 2, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2024 Or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001

July 31, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 31, 2024 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incorp

July 31, 2024 EX-99.1

MISTRAS Announces Second Quarter 2024 and First Half 2024 Results Quarterly Revenue Growth of 7.8% driven by increases in all industries Significant Quarterly Gross Profit and Gross Profit Margin Growth across all segments Further Reductions in Quart

Exhibit 99.1 MISTRAS Announces Second Quarter 2024 and First Half 2024 Results Quarterly Revenue Growth of 7.8% driven by increases in all industries Significant Quarterly Gross Profit and Gross Profit Margin Growth across all segments Further Reductions in Quarterly Selling, General and Administrative expenses Quarterly Net Income of $6.4 million, with Quarterly Adjusted EBITDA (non-GAAP) of $22.

July 9, 2024 EX-99.2

CONFIRMING STATEMENT

EX-99.2 Exhibit 2 CUSIP No. 60649T107 Page 1 of 1 Pages CONFIRMING STATEMENT This Statement confirms that the undersigned has authorized and designated Deven Petito and Eric Yanagi, each acting singly, to execute and file on the undersigned’s behalf all Forms 3, 4 and 5 and Schedules 13D and 13G (including any amendments thereto) that the undersigned may be required to file with the U.S. Securitie

July 9, 2024 SC 13D

MG / Mistras Group, Inc. / Mill Road Capital III, L.P. - SC 13D Activist Investment

SC 13D UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. )* Mistras Group, Inc. (Name of Issuer) Common stock, $0.01 par value (Title of Class of Securities) 60649T107 (CUSIP Number) Mill Road Capital III, L.P. Attn: Thomas E. Lynch 328 Pemberwick Road Greenwich, CT 06831 203-987-3500 With a copy to: Peter

July 9, 2024 EX-99.1

JOINT FILING AGREEMENT

EX-99.1 Exhibit 1 CUSIP No. 60649T107 Page 1 of 1 Pages JOINT FILING AGREEMENT Pursuant to Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree, as of July 9, 2024, that only one statement containing the information required by Schedule 13D, and each amendment thereto, need be filed with respect to the ownership of each of the undersigned of shares o

May 30, 2024 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM SD Specialized Disclosure Report Mistras Group, Inc. (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM SD Specialized Disclosure Report Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001- 34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incorporation) File Number) Identification No.) 195 Clarksville Road Princeton Junction, New Jersey 08550 (Address of principa

May 30, 2024 EX-1.01

Exhibit 1.01 — Conflict Minerals Report as required by Items 1.01 and 1.02 of this Form

Exhibit 1.01 Conflict Minerals Report of Mistras Group, Inc. in Accordance with Rule 13p-1 under the Securities Exchange Act of 1934 This is the Conflict Minerals Report of Mistras Group, Inc. (“Mistras”) for calendar year 2023 in accordance with Rule 13p-1 (“Rule 13p-1”) under the Securities Exchange Act of 1934 (the “1934 Act”). Please refer to Rule 13p-1, Form SD and the 1934 Act Release No. 34

May 22, 2024 EX-FILING FEES

Calculation of Filing Fee Table.

EXHIBIT 107.1 Calculation of Filing Fee Table Form S-8 (Form Type) Mistras Group, Inc. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities Calculation of Registration Fee Security Type Security Class Title Fee Calculation Rule Amount Registered Proposed Maximum Offering Price Per Share (3) Proposed Maximum Aggregate Offering Price (3) Fee Rate Amount of Regi

May 22, 2024 S-8

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-8 Registration Statement The Securities Act of 1933

As filed with the Securities and Exchange Commission on May 22, 2024 Registration No.

May 20, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 14, 2024 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incorpo

May 3, 2024 EX-10.2

Employment Agreement between the registrant and Hani Hammad dated March 26, 2024

EMPLOYMENT AGREEMENT This Employment Agreement (the “Agreement”) is dated as of March 26, 2024 (the “Effective Date”) between Mistras Group, Inc.

May 3, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024 Or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 00

May 1, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 1, 2024 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incorpor

May 1, 2024 EX-99.1

MISTRAS Announces First Quarter 2024 Results Q1 2024 Revenue of $184.4 million, up 9.8% from the prior year period; highest Q1 Revenue since 2018 Q1 2024 Net Income of $1.0 million, reflecting an improvement from a net loss of $5.0 million in the pri

Exhibit 99.1 MISTRAS Announces First Quarter 2024 Results Q1 2024 Revenue of $184.4 million, up 9.8% from the prior year period; highest Q1 Revenue since 2018 Q1 2024 Net Income of $1.0 million, reflecting an improvement from a net loss of $5.0 million in the prior year period Q1 2024 Adjusted EBITDA (non-GAAP) of $16.2 million compared to $10.4 million in the prior year period, up 55.1%; highest

April 4, 2024 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Information Required in Proxy Statement SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Information Required in Proxy Statement   SCHEDULE 14A INFORMATION   Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant  ☐ Check the appropriate box:  ☐  Preliminary Proxy Statement  

April 4, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Information Required in Proxy Statement SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Information Required in Proxy Statement SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of

March 11, 2024 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 001-34481 Mistras Group, Inc. (Exact

March 11, 2024 EX-97.1

Incentive Compensation Recoupment Policy

MISTRAS GROUP, INC. INCENTIVE COMPENSATION RECOUPMENT POLICY Incentive Compensation Recoupment Policy (this “Policy”) adopted by the Compensation Committee (the “Compensation Committee”) of the Board of Directors (the “Board”) of Mistras Group, Inc. (the “Company”) on October 24, 2023 (the “Effective Date”). 1.Purpose. The purpose of this Policy is to provide for the recoupment of certain incentiv

March 11, 2024 EX-10.18

Inducement Award between the Company and Manuel N. Stamatakis dated October 11, 2023

EXECUTION VERSION MISTRAS GROUP, INC. INDUCEMENT AWARD AGREEMENT This Inducement Award Agreement (this “Award Agreement”), effective as of the Date of Grant set forth below, represents the grant of an option (the “Option”) to purchase shares of common stock, par value $.01 per share (“Common Stock”), of Mistras Group, Inc. (the “Company”) to Manuel N. Stamatakis (the “Participant”), subject to the

March 11, 2024 EX-19.1

Insider Trading Compliance Policy

MISTRAS GROUP, INC. INSIDER TRADING COMPLIANCE POLICY All directors, officers and employees (“Insiders”) of Mistras Group, Inc. and its subsidiaries (collectively, the “Company”) are subject to the provisions of this Insider Trading Compliance Policy (the “Policy”). Any questions regarding this Policy and related procedures should be directed to Michael Keefe, Executive Vice President, General Cou

March 11, 2024 EX-21.1

Subsidiaries of the Registrant

Exhibit 21.1 The following is a list of subsidiaries of the registrant. The list omits some subsidiaries which, in the aggregate, would not constitute a significant subsidiary. Name Jurisdiction of Organization Assistances Controles Technologies France Controles Industriels de L'entang France GMA Aeronautica S.L.U. Germany GMA Holding B.V. The Netherlands GMA Werkstoffprufung GmbH Germany Mistras

March 11, 2024 EX-10.16

Employment Agreement between the Company and John A. Smith dated October 1, 2023

EMPLOYMENT AGREEMENT This Employment Agreement (the “Agreement”) is dated as of October 1, 2023 (the “Effective Date”) by and between Mistras Group, Inc.

March 6, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 6, 2024 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incorp

March 6, 2024 EX-99.1

MISTRAS Announces Fourth Quarter and Full Year 2023 Results Q4 2023 Revenue of $182.1 million, up 8.2% Q4 2023 Net Loss of $2.5 million reflecting $6.3 million of reorganization and other costs and $1.2 million of foreign currency exchange losses Q4

Exhibit 99.1 MISTRAS Announces Fourth Quarter and Full Year 2023 Results Q4 2023 Revenue of $182.1 million, up 8.2% Q4 2023 Net Loss of $2.5 million reflecting $6.3 million of reorganization and other costs and $1.2 million of foreign currency exchange losses Q4 2023 Adjusted EBITDA (non-GAAP) of $19.2 million compared to $15.7 million in the prior year, up 22.0%; highest Q4 result historically Fu

March 1, 2024 EX-10.1

First Amendment, dated February 27, 2024, to the Credit Agreement, dated August 1, 2022

EXECUTION VERSION AMENDMENT NO. 1 Dated as of February 27, 2024 to CREDIT AGREEMENT Dated as of August 1, 2022 THIS AMENDMENT NO. 1 (this “Amendment”) is made as of February 27, 2024 by and among MISTRAS GROUP, INC., a Delaware corporation (the “Borrower”), the Lenders (as defined below) party hereto and JPMORGAN CHASE BANK, N.A., as Administrative Agent (the “Administrative Agent’) under that cer

March 1, 2024 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 27, 2024 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of in

February 14, 2024 SC 13D

MG / Mistras Group, Inc. / Sotirios Vahaviolos January 2023 2-Year Grantor Retained Annuity Trust - SC 13D Activist Investment

SC 13D 1 sjvgrat13d.htm SC 13D UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. )* Mistras Group, Inc. (Name of Issuer) Common Stock, par value $0.00 per share (Title of Class of Securities) 60649T 107 (CUSIP Number) Stephanie Foglia, Trustee c/o Mistras Group, Inc. 195 Clarksville Road Princeton Junction,

February 14, 2024 SC 13G/A

MG / Mistras Group, Inc. / Vahaviolos Sotirios J. - SC 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 14)* Mistras Group, Inc. (Name of Issuer) Common Stock, $0.01 par value (Title of Class of Securities) 60649T 107 (CUSIP Number) December 31, 2023 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuan

February 14, 2024 SC 13D/A

MG / Mistras Group, Inc. / Sotirios Vahaviolos January 2023 2-Year Grantor Retained Annuity Trust - SC 13D/A Activist Investment

SC 13D/A 1 sjvgrat13d.htm SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 1)* Mistras Group, Inc. (Name of Issuer) Common Stock, par value $0.00 per share (Title of Class of Securities) 60649T 107 (CUSIP Number) Stephanie Foglia, Trustee c/o Mistras Group, Inc. 195 Clarksville Road Princeton Junc

February 14, 2024 SC 13G/A

MG / Mistras Group, Inc. / Vahaviolos Sotirios J. - SC 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 14)* Mistras Group, Inc. (Name of Issuer) Common Stock, $0.01 par value (Title of Class of Securities) 60649T 107 (CUSIP Number) December 31, 2023 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuan

December 12, 2023 CORRESP

December 12, 2023

December 12, 2023 Division of Corporation Finance U.S. Securities and Exchange Commission Washington, D.C. 20459 Re: Mistras Group, Inc. Definitive Proxy Statement on Schedule 14A Filed April 12, 2023 File No. 001-34481 Ladies and Gentlemen: Mistras Group, Inc. (the “Company”) is in receipt of your letter dated November 9, 2023, regarding your limited review of the filing referenced above. Please

December 8, 2023 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 6, 2023 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of inc

December 8, 2023 EX-10.1

Separation Agreement (and a General Release of Claims attached thereto) between the Company and Dennis Bertolotti effective December 6, 2023 (filed as exhibited 10.1 to Current Report on Form 8-K filed December 8, 2023, and incorporated herein by reference).

EXECUTION VERSION SEPARATION AGREEMENT THIS SEPARATION AGREEMENT (the “Agreement”) is made as of this [6th] day of December, 2023 (the “Effective Date”) by and between Mistras Group Inc.

November 6, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 Or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file numbe

November 6, 2023 EX-10.1

Employment Agreement between the Company and Gennaro A. D'Alterio dated September 11, 2023 (filed as exhibit 10.1 to the Quarterly Report on Form 10-Q filed November 6, 2023 and incorporated by reference herein).

EMPLOYMENT AGREEMENT This Employment Agreement (the “Agreement”) is dated as of September 11, 2023 (the “Effective Date”) by and between Mistras Group, Inc.

November 2, 2023 EX-99.2

MISTRAS Provides Update on Project Phoenix

MISTRAS Provides Update on Project Phoenix PRINCETON JUNCTION, N.J., November 2, 2023 (GLOBE NEWSWIRE) - MISTRAS Group, Inc. (MG: NYSE), a leading "one source" multinational provider of integrated technology-enabled asset protection solutions, today provided an update on the status of Project Phoenix, the Company’s strategic program to increase Income from Operations through reductions in corporat

November 2, 2023 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 2, 2023 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of inc

November 2, 2023 EX-99.1

MISTRAS Announces Third Quarter 2023 Results Continued Revenue Growth in Commercial Aerospace and Data Analytical Solutions Markets Further Reductions in Quarterly Selling, General and Administrative expenses Provides Update on Project Phoenix and Pr

Exhibit 99.1 MISTRAS Announces Third Quarter 2023 Results Continued Revenue Growth in Commercial Aerospace and Data Analytical Solutions Markets Further Reductions in Quarterly Selling, General and Administrative expenses Provides Update on Project Phoenix and Preliminary Anticipated Impact on 2024 Outlook PRINCETON JUNCTION, N.J., November 2, 2023 (GLOBE NEWSWIRE) - MISTRAS Group, Inc. (MG: NYSE)

October 13, 2023 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 10, 2023 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of inc

October 13, 2023 EX-99.1

MISTRAS GROUP ANNOUNCES GRANT OF STOCK OPTIONS FOLLOWING APPOINTMENT OF NEW INTERIM PRESIDENT AND CEO

MISTRAS GROUP ANNOUNCES GRANT OF STOCK OPTIONS FOLLOWING APPOINTMENT OF NEW INTERIM PRESIDENT AND CEO PRINCETON JUNCTION, N.

October 10, 2023 EX-10.2

Form of Inducement Award Agreement between the Company and Manuel N. Stamatakis.

EXECUTION VERSION MISTRAS GROUP, INC. INDUCEMENT AWARD AGREEMENT This Inducement Award Agreement (this “Award Agreement”), effective as of the Date of Grant set forth below, represents the grant of an option (the “Option”) to purchase shares of common stock, par value $.01 per share (“Common Stock”), of Mistras Group, Inc. (the “Company”) to Manuel N. Stamatakis (the “Participant”), subject to the

October 10, 2023 EX-10.1

Letter Agreement dated October 9, 2023, between the Company and Manuel N. Stamatakis (filed as exhibit 10.1 to Current Report on Form 8-K filed on October 10, 2023 and incorporated herein by reference).

EXECUTION VERSION October 9, 2023 Dear Mr. Stamatakis: This letter agreement (this “Agreement”) sets forth the terms of your employment, on an interim basis, as President and Chief Executive Officer of Mistras Group, Inc. (the “Company”), commencing on October 9, 2023 (the “Effective Date”). i.Position; Responsibilities. 1.On the Effective Date, you will begin to serve, on an interim basis, as Pre

October 10, 2023 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Amendment to Registrant's Code of Ethics, or Waiver of a Provision of the Code of Ethics, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 9, 2023 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of inco

October 10, 2023 EX-99.1

MISTRAS GROUP ANNOUNCES MAJOR LEADERSHIP TRANSITION Dr. Sotirios J. Vahaviolos Appointed Chairman Emeritus Mr. Manuel N. Stamatakis Named Chairman of the Board and Interim CEO Mr. Dennis M. Bertolotti, President and CEO, departs the Company Mr. James

MISTRAS GROUP ANNOUNCES MAJOR LEADERSHIP TRANSITION Dr. Sotirios J. Vahaviolos Appointed Chairman Emeritus Mr. Manuel N. Stamatakis Named Chairman of the Board and Interim CEO Mr. Dennis M. Bertolotti, President and CEO, departs the Company Mr. James J. Forese Appointed Lead Director and Chair of Corporate Governance Committee PRINCETON JUNCTION, N.J. – October 9, 2023 (GLOBE NEWSWIRE) – MISTRAS G

August 7, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 Or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001

August 2, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 2, 2023 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incor

August 2, 2023 EX-99.1

MISTRAS Announces Second Quarter and First Half 2023 Results Strong revenue growth in key markets - Commercial Aerospace and Data Solutions including OnStream Pipeline Selling, General and Administrative expenses reduced by $1.3 million or 3.1% on a

Exhibit 99.1 MISTRAS Announces Second Quarter and First Half 2023 Results Strong revenue growth in key markets - Commercial Aerospace and Data Solutions including OnStream Pipeline Selling, General and Administrative expenses reduced by $1.3 million or 3.1% on a quarterly sequential basis Significant Operating Cashflow increase of 134.6% for the first half of 2023 to $18.3 million PRINCETON JUNCTI

August 2, 2023 EX-99.1

MISTRAS Announces Second Quarter and First Half 2023 Results Strong revenue growth in key markets - Commercial Aerospace and Data Solutions including OnStream Pipeline Selling, General and Administrative expenses reduced by $1.3 million or 3.1% on a

Exhibit 99.1 MISTRAS Announces Second Quarter and First Half 2023 Results Strong revenue growth in key markets - Commercial Aerospace and Data Solutions including OnStream Pipeline Selling, General and Administrative expenses reduced by $1.3 million or 3.1% on a quarterly sequential basis Significant Operating Cashflow increase of 134.6% for the first half of 2023 to $18.3 million PRINCETON JUNCTI

August 2, 2023 8-K/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K/A CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 2, 2023 Mistras Group, I

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K/A CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 2, 2023 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of inc

May 30, 2023 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM SD Specialized Disclosure Report Mistras Group, Inc. (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM SD Specialized Disclosure Report Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001- 34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incorporation) File Number) Identification No.) 195 Clarksville Road Princeton Junction, New Jersey 08550 (Address of principa

May 30, 2023 EX-1.01

Exhibit 1.01 — Conflict Minerals Report as required by Items 1.01 and 1.02 of this Form

Exhibit 1.01 Conflict Minerals Report of Mistras Group, Inc. in Accordance with Rule 13p-1 under the Securities Exchange Act of 1934 This is the Conflict Minerals Report of Mistras Group, Inc. (“Mistras”) for calendar year 2022 in accordance with Rule 13p-1 (“Rule 13p-1”) under the Securities Exchange Act of 1934 (the “1934 Act”). Please refer to Rule 13p-1, Form SD and the 1934 Act Release No. 34

May 24, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 22, 2023 Mistras Group, Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 22, 2023 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incorpo

May 5, 2023 EX-10.2

Description of Compensation for Non-Employee Directors effective January 1, 2023 (filed as exhibit 10.2 to Quarterly Report on Form 10-Q filed on May 5, 2023, and incorporated herein by reference).

Mistras Group, Inc. Compensation Plan for Non-Employee Directors Effective January 1, 2023 Participants: Members of the Board of Directors who are not employees of the Company. Annual Retainer: $90,000 per year, payable $22,500 per quarter at the beginning of each quarter. This amount will be paid in cash. Committee Chair Fees: Committee Chairs shall receive the following annual fees, payable quar

May 5, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 Or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 00

May 5, 2023 10-K/A

Year ended December 31, 2021 Services International Products Corp/Elim Total Oil & Gas $ 330,880 $ 35,232 $ 808 $ — $ 366,920 Aerospace & Defense 51,593 16,513 286 — $ 68,392 Industrials 41,873 24,000 1,842 — $ 67,715 Power Generation and Transmissio

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K/A ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 001-34481 Mistras Group, Inc. (Exa

May 3, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 3, 2023 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incorpor

May 3, 2023 EX-99.1

MISTRAS Announces First Quarter 2023 Results Revenue increase of 3.9% as reported; up 5.5% in constant currency Continued Gross Margin improvement - Gross Profit Margin increase of 270 basis points Significantly improved Cash provided by Operating Ac

Exhibit 99.1 MISTRAS Announces First Quarter 2023 Results Revenue increase of 3.9% as reported; up 5.5% in constant currency Continued Gross Margin improvement - Gross Profit Margin increase of 270 basis points Significantly improved Cash provided by Operating Activities and Free Cash Flow PRINCETON JUNCTION, N.J., May 3, 2023 (GLOBE NEWSWIRE) - MISTRAS Group, Inc. (MG: NYSE), a leading "one sourc

April 12, 2023 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Information Required in Proxy Statement SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Information Required in Proxy Statement SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ý Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confid

April 12, 2023 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Information Required in Proxy Statement SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) Information Required in Proxy Statement SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of

April 3, 2023 EX-16.1

Letter from KPMG, LLP, dated April 3, 2023

April 3, 2023 Securities and Exchange Commission Washington, D.C. 20549 Ladies and Gentlemen: We were previously principal accountants for Mistras Group, Inc. and, under the date of March 15, 2023, we reported on the consolidated financial statements of Mistras Group, Inc. as of and for the years ended December 31, 2022 and 2021 and the effectiveness of internal control over financial reporting as

April 3, 2023 8-K

Financial Statements and Exhibits, Changes in Registrant's Certifying Accountant

8-K 1 auditorchange8-k.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 29, 2023 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Co

March 15, 2023 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 001-34481 Mistras Group, Inc. (Exact

March 15, 2023 EX-21.1

Subsidiaries of the Registrant

Exhibit 21.1 The following is a list of subsidiaries of the registrant. The list omits some subsidiaries which, in the aggregate, would not constitute a significant subsidiary. Name Jurisdiction of Organization Aetos Group, Inc. Delaware Assistances Controles Technologies France CISMIS Springfield Corp. Delaware Conam Inspection and Engineering Services, Inc. Delaware Controles Industriels de L'en

March 15, 2023 EX-10.1

Credit Agreement, dated August 1, 2022 (filed as Exhibit 10.1 to the Annual Report on Form 10-K filed March 15, 2023 and incorporated herein by reference).

EXECUTION VERSION CREDIT AGREEMENT dated as of August 1, 2022 among MISTRAS GROUP, INC.

March 8, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 3, 2023 Mistras Group, Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 3, 2023 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incorp

March 8, 2023 EX-10.1

Separation Agreement and Release between Jonathan Wolk and Registrant (filed as exhibit 10.1 to Current Report on Form 8-K filed on March 8, 2023 and incorporated herein by reference).

SEPARATION AGREEMENT AND GENERAL RELEASE Separation Agreement and General Release (“Agreement”) between Mistras Group, Inc.

March 8, 2023 EX-99.1

MISTRAS Announces Fourth Quarter and Full Year 2022 Results Significantly Improved Quarterly Operating Profit and Net Income Growth Fourth quarter Gross Profit expands 130 basis points, Operating Income increases 152% 2022 Full Year Net Income of $6.

Exhibit 99.1 MISTRAS Announces Fourth Quarter and Full Year 2022 Results Significantly Improved Quarterly Operating Profit and Net Income Growth Fourth quarter Gross Profit expands 130 basis points, Operating Income increases 152% 2022 Full Year Net Income of $6.5 million, a 68% increase from the prior year Continued deleveraging, with $11 million of full year debt repayments PRINCETON JUNCTION, N

February 9, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 8, 2023 Mistras Group, I

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 8, 2023 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of inc

February 9, 2023 EX-99.1

MISTRAS Group Announces Change In Leadership and Engagement of AlixPartners to Define Operational Enhancements Designed to Drive Performance And Shareholder Value

Exhibit 99.1 MISTRAS Group Announces Change In Leadership and Engagement of AlixPartners to Define Operational Enhancements Designed to Drive Performance And Shareholder Value PRINCETON JUNCTION, N.J., Feb. 08, 2023 (GLOBE NEWSWIRE) – MISTRAS Group, Inc. (MG: NYSE) – a leading "one source" multinational provider of technology-enabled asset protection solutions used to maximize the uptime and safet

February 7, 2023 SC 13G

MG / Mistras Group Inc / Vahaviolos Sotirios J. - SC 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 13)* Mistras Group, Inc. (Name of Issuer) Common Stock, $0.01 par value (Title of Class of Securities) 60649T 107 (CUSIP Number) December 31, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuan

January 26, 2023 SC 13D

MG / Mistras Group Inc / Sotirios Vahaviolos January 2023 2-Year Grantor Retained Annuity Trust - SC 13D Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. )* Mistras Group, Inc. (Name of Issuer) Common Stock, par value $0.00 per share (Title of Class of Securities) 60649T 107 (CUSIP Number) Stephanie Foglia, Trustee c/o Mistras Group, Inc. 195 Clarksville Road Princeton Junction, NJ 08550 670-324-6463 (Name, A

November 7, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2022 Or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file numbe

November 2, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 2, 2022 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of inc

November 2, 2022 EX-99.1

MISTRAS Announces Third Quarter 2022 Results Quarterly Consolidated Top-line Growth of 2.2% Quarterly Consolidated Gross Profit Margin increase of 20 bps Successfully completed bank refinancing, which upsized available liquidity, lowered effective cr

Exhibit 99.1 MISTRAS Announces Third Quarter 2022 Results Quarterly Consolidated Top-line Growth of 2.2% Quarterly Consolidated Gross Profit Margin increase of 20 bps Successfully completed bank refinancing, which upsized available liquidity, lowered effective credit spread and provided covenant flexibility PRINCETON JUNCTION, N.J., November 2, 2022 (GLOBE NEWSWIRE) - MISTRAS Group, Inc. (MG: NYSE

August 5, 2022 EX-10

Settlement Agreement, amended May 3, 2022, regarding the settlement of the two legal proceedings captioned Price v. Mistras Group, Inc

FIRST AMENDED CLASS ACTION SETTLEMENT AGREEMENT This First Amended Class Action Settlement Agreement (?Agreement?) is made by and between plaintiffs Brenda Price and Justin Price (?Plaintiffs?) and defendant Mistras Group, Inc.

August 5, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2022 Or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001

August 5, 2022 EX-10

Amendment No. 3 dated May 23, 2022 to the 2016 Long-Term Incentive Plan (filed as

EX-10 3 a10qexhibit102-q22022.htm EX-10.2 Third Amendment To Mistras Group, Inc. 2016 Long-Term Incentive Plan Background A.Mistras Group, Inc. (the “Company”) maintains the Mistras Group, Inc. 2016 Long-Term Incentive Plan (the “Plan”). B.The Plan was originally effective as of October 18, 2016, the date on which it was approve by a majority of the shareholders voting at the Company’s 2016 annual

August 5, 2022 EX-FILING FEES

Filing Fee Table

Exhibit 107.1 Calculation of Filing Fee Table Form S-8 (Form Type) Mistras Group, Inc. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities Calculation of Registration Fee Title of each class of securities to be registered (1)(2) Amount to be registered Proposed maximum offering price per share(3) Proposed maximum aggregate offering price(3) Amount of registr

August 5, 2022 S-8

As filed with the Securities and Exchange Commission on August 5, 2022

As filed with the Securities and Exchange Commission on August 5, 2022 Registration No.

August 3, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 3, 2022 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incor

August 3, 2022 EX-99

MISTRAS Announces Second Quarter and First Half 2022 Results Top-line Growth of 2.8% for the first six months of 2022, with Aerospace & Defense revenue up 28.4% Quarterly interest expense reduction of $1.0 million or 32.9% Ongoing deleveraging, with

Exhibit 99.1 MISTRAS Announces Second Quarter and First Half 2022 Results Top-line Growth of 2.8% for the first six months of 2022, with Aerospace & Defense revenue up 28.4% Quarterly interest expense reduction of $1.0 million or 32.9% Ongoing deleveraging, with $8.1 million of quarterly debt repayments, and total debt reduced to $200.4 million New Growth Initiatives - OneSuite? (Data Solutions),

August 2, 2022 EX-99

MISTRAS GROUP ANNOUNCES NEW EXPANDED CREDIT AGREEMENT AND IMPROVED DEBT REFINANCING

EX-99 3 aex991-pressreleasexbankam.htm EX-99 Exhibit 99.1 MISTRAS GROUP ANNOUNCES NEW EXPANDED CREDIT AGREEMENT AND IMPROVED DEBT REFINANCING •Upsizes available liquidity, with an increase in borrowing capacity of approximately $100 million, to $315 million total •Immediately lowers the effective credit spread by 25 basis points •Significantly reduces required quarterly term loan amortization •Add

August 2, 2022 8-K

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 1, 2022 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incor

August 2, 2022 EX-10

Credit Agreement, dated August 1, 2022.

EXECUTION VERSION CREDIT AGREEMENT dated as of August 1, 2022 among MISTRAS GROUP, INC.

June 24, 2022 EX-1.01

Exhibit 1.01 — Conflict Minerals Report as required by Items 1.01 and 1.02 of this Form

Exhibit 1.01 Conflict Minerals Report of Mistras Group, Inc. in Accordance with Rule 13p-1 under the Securities Exchange Act of 1934 This is the Conflict Minerals Report of Mistras Group, Inc. (?Mistras?) for calendar year 2021 in accordance with Rule 13p-1 (?Rule 13p-1?) under the Securities Exchange Act of 1934 (the ?1934 Act?). Please refer to Rule 13p-1, Form SD and the 1934 Act Release No. 34

June 24, 2022 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM SD Specialized Disclosure Report Mistras Group, Inc. (Exact name of registrant as specified in its charter)

SD 1 sdconflictminerals-0528202.htm SD UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM SD Specialized Disclosure Report Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001- 34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incorporation) File Number) Identification No.) 195 Clarksville Road Princeton Junction

May 25, 2022 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 23, 2022 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incorpo

May 6, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2022 Or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 00

May 3, 2022 EX-99.1

MISTRAS Announces First Quarter 2022 Results Continuing Top-Line Growth, Lowered Cost of Capital and Expanded Data Solutions offerings Organic revenue growth of 5.2% Interest expense reduction of $1.3 million or 39.7% Continued expansion of OneSuite™

Exhibit 99.1 MISTRAS Announces First Quarter 2022 Results Continuing Top-Line Growth, Lowered Cost of Capital and Expanded Data Solutions offerings Organic revenue growth of 5.2% Interest expense reduction of $1.3 million or 39.7% Continued expansion of OneSuite™ (Data Solutions), Sensoria™ (Wind) and Private Space capabilities PRINCETON JUNCTION, N.J., May 3, 2022 (GLOBE NEWSWIRE) - MISTRAS Group

May 3, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 3, 2022 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incorpor

April 13, 2022 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ? Filed by a Party other than the Registrant ?? Check the appropriate box: ?? ? ? Preliminary Proxy Statement ??

April 13, 2022 8-K

Regulation FD Disclosure

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 13, 2022 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incor

April 13, 2022 EX-99.1

Select information from the Mistras Group, Inc. 2021 Annual Report

April 13, 2022 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for the Us

March 14, 2022 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2021 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 001-34481 Mistras Group, Inc. (Exact

March 14, 2022 EX-21.1

Subsidiaries of the Registrant

Exhibit 21.1 The following is a list of subsidiaries of the registrant. The list omits some subsidiaries which, in the aggregate, would not constitute a significant subsidiary. Name Jurisdiction of Organization Aetos Group, Inc. Delaware Assistances Controles Technologies France CISMIS Springfield Corp. Delaware Conam Inspection and Engineering Services, Inc. Delaware Controles Industriels de L'en

March 9, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 9, 2022 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incorp

March 9, 2022 EX-99.1

MISTRAS Announces Fourth Quarter and Full Year 2021 Results Continued Top-Line Growth and Significantly Improved Bottom-Line Annual Operating Performance 2021 Revenue Increase of 14.3% organically 2021 Operating Income of $18.2 million, a substantial

Exhibit 99.1 MISTRAS Announces Fourth Quarter and Full Year 2021 Results Continued Top-Line Growth and Significantly Improved Bottom-Line Annual Operating Performance 2021 Revenue Increase of 14.3% organically 2021 Operating Income of $18.2 million, a substantial increase from the prior year Ongoing deleveraging, with $16.3 million of full year debt repayments, and total debt decrease to $202.6 mi

February 9, 2022 SC 13G

MG / Mistras Group Inc / Vahaviolos Sotirios J. - SC 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 12)* Mistras Group, Inc. (Name of Issuer) Common Stock, $0.01 par value (Title of Class of Securities) 60649T 107 (CUSIP Number) December 31, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuan

November 3, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2021 Or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file numbe

November 3, 2021 EX-10.1

Settlement Agreement, dated October 5, 2021, regarding the settlement of the two legal proceedings captioned Price v. Mistras Group, Inc

CLASS ACTION SETTLEMENT AGREEMENT This Class Action Settlement Agreement (?Agreement?) is made by and between plaintiffs Brenda Price and Justin Price (?Plaintiffs?) and defendant Mistras Group, Inc.

November 2, 2021 EX-99.1

MISTRAS Announces Third Quarter 2021 Results Continued Recovery of Top-Line Growth and Significantly Improved Bottom-Line Performance

Exhibit 99.1 MISTRAS Announces Third Quarter 2021 Results Continued Recovery of Top-Line Growth and Significantly Improved Bottom-Line Performance Revenue Increase of 18%, Operating income expands by 61% and Net Income Up 122% Proprietary Technologies OneSuite? Gaining Traction and Launch of Sensoria? PRINCETON JUNCTION, N.J., November 2, 2021 (GLOBE NEWSWIRE) - MISTRAS Group, Inc. (MG: NYSE), a l

November 2, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 2, 2021 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of inc

August 4, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2021 Or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001

August 4, 2021 EX-10.2

Memorandum of Understanding, dated May 4, 2021, regarding the settlement of the two legal proceedings captioned

Exhibit 10.2 Price v. Mistras Group, Case Nos. 20STCV22485 and 20LBCV00408 MEMORANDUM OF UNDERSTANDING Subject to final approval by the Court, and with the understanding that the settlement agreement (?Agreement?) documented in this Memorandum of Understanding (?MOU?) shall be further memorialized in a more comprehensive written settlement agreement, Plaintiff Justin Price (?Price? or ?Plaintiff?)

August 3, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 2, 2021 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incor

August 3, 2021 EX-99.1

MISTRAS Announces Second Quarter and First Half 2021 Results Strong Top and Bottom-line Growth resulting in Solid Cash Flow Revenue up 42.8% to $177.7 million with Net Income of $5.9 million and diluted EPS of $0.20 Adjusted EBITDA increased 96.5% to

Exhibit 99.1 MISTRAS Announces Second Quarter and First Half 2021 Results Strong Top and Bottom-line Growth resulting in Solid Cash Flow Revenue up 42.8% to $177.7 million with Net Income of $5.9 million and diluted EPS of $0.20 Adjusted EBITDA increased 96.5% to $22.6 million and Operating Cash Flow of $15.0 million PRINCETON JUNCTION, N.J., August 2, 2021 (GLOBE NEWSWIRE) - MISTRAS Group, Inc. (

August 3, 2021 EX-99.2

Mistras Group, Inc. and Subsidiaries Unaudited Reconciliation of Net Income (Loss) (GAAP) and Diluted EPS (GAAP) to Net Income (Loss) Excluding Special Items (non-GAAP) and Diluted EPS Excluding Special Items (non-GAAP) (tabular dollars in thousands,

Exhibit 99.2 Mistras Group, Inc. and Subsidiaries Unaudited Reconciliation of Net Income (Loss) (GAAP) and Diluted EPS (GAAP) to Net Income (Loss) Excluding Special Items (non-GAAP) and Diluted EPS Excluding Special Items (non-GAAP) (tabular dollars in thousands, except per share data) Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 Net income (loss) attributable to Mistr

May 28, 2021 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM SD Specialized Disclosure Report Mistras Group, Inc. (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM SD Specialized Disclosure Report Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001- 34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incorporation) File Number) Identification No.) 195 Clarksville Road Princeton Junction, New Jersey 08550 (Address of principa

May 28, 2021 SD/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM SD Specialized Disclosure Report Mistras Group, Inc. (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM SD Specialized Disclosure Report Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001- 34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incorporation) File Number) Identification No.) 195 Clarksville Road Princeton Junction, New Jersey 08550 (Address of principa

May 28, 2021 EX-1.01

Exhibit 1.01 — Conflict Minerals Report as required by Items 1.01 and 1.02 of this Form

Exhibit 1.01 Conflict Minerals Report of Mistras Group, Inc. in Accordance with Rule 13p-1 under the Securities Exchange Act of 1934 This is the Conflict Minerals Report of Mistras Group, Inc. (?Mistras?) for calendar year 2020 in accordance with Rule 13p-1 (?Rule 13p-1?) under the Securities Exchange Act of 1934 (the ?1934 Act?). Please refer to Rule 13p-1, Form SD and the 1934 Act Release No. 34

May 28, 2021 EX-1.01

Exhibit 1.01 — Conflict Minerals Report as required by Items 1.01 and 1.02 of this Form

Exhibit 1.01 Conflict Minerals Report of Mistras Group, Inc. in Accordance with Rule 13p-1 under the Securities Exchange Act of 1934 This is the Conflict Minerals Report of Mistras Group, Inc. (?Mistras?) for calendar year 2020 in accordance with Rule 13p-1 (?Rule 13p-1?) under the Securities Exchange Act of 1934 (the ?1934 Act?). Please refer to Rule 13p-1, Form SD and the 1934 Act Release No. 34

May 26, 2021 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 24, 2021 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incorpo

May 20, 2021 EX-99.1

MISTRAS GROUP ANNOUNCES AMENDMENT TO EXISTING CREDIT AGREEMENT SIGNIFICANTLY LOWERS THE COST OF BORROWING, ADDS EXPANDED COVENANT FLEXIBILITY, AND ENABLES CONTINUED INVESTMENT IN ORGANIC GROWTH DRIVERS, INCLUDING DIGITAL DATA INITIATIVES

Exhibit 99.1 MISTRAS GROUP ANNOUNCES AMENDMENT TO EXISTING CREDIT AGREEMENT SIGNIFICANTLY LOWERS THE COST OF BORROWING, ADDS EXPANDED COVENANT FLEXIBILITY, AND ENABLES CONTINUED INVESTMENT IN ORGANIC GROWTH DRIVERS, INCLUDING DIGITAL DATA INITIATIVES ?Immediately lowers the effective cost of borrowing by 90 basis points ?Adds additional covenant flexibility by extending leverage allowance to 4.0X

May 20, 2021 EX-10.1

Fifth Amendment, dated May 19, 2021, to Fifth Amended and Restated Credit Agreement, dated December 13, 2018

Exhibit 10.1 FIFTH AMENDMENT TO FIFTH AMENDED AND RESTATED CREDIT AGREEMENT THIS FIFTH AMENDMENT TO FIFTH AMENDED AND RESTATED CREDIT AGREEMENT (hereinafter referred to as this ?Amendment?), dated as of May 19, 2021, is executed by and among, MISTRAS GROUP, INC., a corporation duly organized, validly existing and in good standing under the laws of the State of Delaware, having its principal office

May 20, 2021 8-K

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 19, 2021 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incorpo

May 7, 2021 EX-10.1

Fourth Amendment, dated February 11, 2021, to the Fifth Amended and Restated Credit Agreement,

10.1 FOURTH AMENDMENT TO FIFTH AMENDED AND RESTATED CREDIT AGREEMENT THIS FOURTH AMENDMENT TO FIFTH AMENDED AND RESTATED CREDIT AGREEMENT (hereinafter referred to as this ?Amendment?), dated as of February 11, 2021, is executed by and among, MISTRAS GROUP, INC., a corporation duly organized, validly existing and in good standing under the laws of the State of Delaware, having its principal office

May 7, 2021 10-Q

Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2021 Or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 00

May 5, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 5, 2021 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incorpor

May 5, 2021 EX-99

MISTRAS Group Announces First Quarter 2021 Results Revenue in Line with Outlook and on Track for Significant Improvement over remainder of Fiscal 2021 Continued Gross Margin Expansion - Gross Profit Margin up 50 basis points Strong Expense Discipline

Exhibit 99.1 MISTRAS Group Announces First Quarter 2021 Results Revenue in Line with Outlook and on Track for Significant Improvement over remainder of Fiscal 2021 Continued Gross Margin Expansion - Gross Profit Margin up 50 basis points Strong Expense Discipline - Selling, General and Administrative expenses decrease by 4.6% Profitability Improves - Net loss decreased to $5.4 million, with Adjust

April 14, 2021 DEF 14A

- DEF 14A

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ? Filed by a Party other than the Registrant ?? Check the appropriate box: ?? ? ? Preliminary Proxy Statement ??

April 14, 2021 DEFA14A

- DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for the Us

March 29, 2021 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 24, 2021 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incor

March 17, 2021 S-8

- S-8

As filed with the Securities and Exchange Commission on March 16, 2021 Registration No.

March 16, 2021 EX-99.1

MISTRAS Group Announces Fourth Quarter and Full Year 2020 Results Third Consecutive Year of over 100 Basis Point Expansion of Annual Gross Profit Margin to 30.1% Operating Cash Flow Increases 39.6% in Fourth Quarter, Up 14.7% for Full Year to $67.8 M

Exhibit 99.1 MISTRAS Group Announces Fourth Quarter and Full Year 2020 Results Third Consecutive Year of over 100 Basis Point Expansion of Annual Gross Profit Margin to 30.1% Operating Cash Flow Increases 39.6% in Fourth Quarter, Up 14.7% for Full Year to $67.8 Million Debt paydown of $36.0 Million in 2020, resulting in a 13.5% reduction in Total Debt Company Well Positioned for Strong Fiscal 2021

March 16, 2021 EX-21.1

Subsidiaries of the Registrant

EX-21.1 3 a20201231subsidiarylisting.htm EX-21.1 Exhibit 21.1 The following is a list of subsidiaries of the registrant. The list omits some subsidiaries which, in the aggregate, would not constitute a significant subsidiary. Name Jurisdiction of Organization Aetos Group, Inc. Delaware Assistances Controles Technologies France CISMIS Springfield Corp. Delaware Conam Inspection and Engineering Serv

March 16, 2021 10-K

Annual Report - 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2020 or ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 001-34481 Mistras Group, Inc. (Exact

March 16, 2021 EX-10.10

Amendment No. 2, dated December 1, 2020, to the 2016 Long-Term Incentive Plan.

Exhibit 10.10 Second Amendment To Mistras Group, Inc. 2016 Long-Term Incentive Plan Background A.Mistras Group, Inc. (the ?Company?), maintains the Mistras Group, Inc. 2016 Long-Term Incentive Plan (the ?Plan?). B.The Plan was originally effective as of October 18, 2016, the date on which it was approve by a majority of the shareholders voting at the Company?s 2016 annual shareholders meeting, and

March 16, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 16, 2021 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incor

February 12, 2021 SC 13G/A

SCHEDULE 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1 )* Mistras Group Inc (Name of Issuer) Common Stock (Title of Class of Securities) 60649T107 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Sche

February 11, 2021 SC 13G/A

UNITED STATES

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 11)* Mistras Group, Inc. (Name of Issuer) Common Stock, $0.01 par value (Title of Class of Securities) 60649T 107 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuan

February 10, 2021 SC 13G/A

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 3)*

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 3)* Name of issuer: Mistras Group Inc Title of Class of Securities: Common Stock CUSIP Number: 60649T107 Date of Event Which Requires Filing of this Statement: December 31, 2020 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ R

December 2, 2020 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 25, 2020 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of in

December 2, 2020 EX-99.1

MISTRAS GROUP, INC. ELECTS CHARLES P. PIZZI TO BOARD OF DIRECTORS

MISTRAS GROUP, INC. ELECTS CHARLES P. PIZZI TO BOARD OF DIRECTORS PRINCETON JUNCTION, N.J. – DECEMBER 2, 2020 – MISTRAS Group, Inc. (NYSE: MG) announced today that Mr. Charles P. Pizzi, Independence Health Group Chairman and former executive of Tasty Baking Company, has been elected to the company’s Board of Directors, effective January 1, 2021. As part of his Board appointment, Mr. Pizzi will ser

November 6, 2020 10-Q

Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2020 Or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file numbe

November 4, 2020 EX-99.1

Mistras Group, Inc. and Subsidiaries Condensed Consolidated Balance Sheets (in thousands, except share and per share data)

Exhibit 99.1 MISTRAS Group Announces Third Quarter 2020 Results November 4, 2020 Sequential Quarterly Revenue Growth of 18.9%; Year over Year Quarterly Gross Profit Margin Increased by 190 bps and SG&A expense decreased by 12.3%; Continued Positive Quarterly Operating Cash Flow, Free Cash Flow and Debt Reduction PRINCETON JUNCTION, N.J., November 4, 2020 (GLOBE NEWSWIRE) - MISTRAS Group, Inc. (MG:

November 4, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 4, 2020 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of inc

August 10, 2020 10-Q

Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2020 Or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001

August 10, 2020 EX-10.2

Amendment No. 1, dated May 19, 2020, to the 2016 Long-Term Incentive Plan (filed as exhibit 10.2 to the Quarterly Report Form 10-Q filed on August 7, 2020 and incorporated herein by reference)

First Amendment To Mistras Group, Inc. 2016 Long-Term Incentive Plan Background A.Mistras Group, Inc. (the “Company”), maintains the Mistras Group, Inc. 2016 Long-Term Incentive Plan (the “Plan”). B.The Plan was originally effective as of October 18, 2016, the date on which it was approve by a majority of the shareholders voting at the Company’s 2016 annual shareholders meeting. C.The Plan current

August 6, 2020 EX-99.1

Mistras Group Announces Second Quarter 2020 Results Cash from operations of $28.8 million up 122% and Free cash flow of $25.5 million, up 284%, from the year ago quarter Debt repayment of $18.8 million, a quarterly record, with Total debt of $239.4 m

Exhibit 99.1 Mistras Group Announces Second Quarter 2020 Results Cash from operations of $28.8 million up 122% and Free cash flow of $25.5 million, up 284%, from the year ago quarter Debt repayment of $18.8 million, a quarterly record, with Total debt of $239.4 million Gross Profit Margin expands to 33.1%, highest quarterly level in over five years Selling, General & Administrative Expense down 10

August 6, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 5, 2020 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incor

June 10, 2020 EX-1.01

Exhibit 1.01 — Conflict Minerals Report as required by Items 1.01 and 1.02 of this Form

Exhibit 1.01 Conflict Minerals Report of Mistras Group, Inc. in Accordance with Rule 13p-1 under the Securities Exchange Act of 1934 This is the Conflict Minerals Report of Mistras Group, Inc. (“Mistras”) for calendar year 2019 in accordance with Rule 13p-1 (“Rule 13p-1”) under the Securities Exchange Act of 1934 (the “1934 Act”). Please refer to Rule 13p-1, Form SD and the 1934 Act Release No. 34

June 10, 2020 SD

- SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM SD Specialized Disclosure Report Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001- 34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incorporation) File Number) Identification No.) 195 Clarksville Road Princeton Junction, New Jersey 08550 (Address of principa

May 22, 2020 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 19, 2020 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001- 34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incorp

May 19, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 18, 2020 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001- 34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incorp

May 19, 2020 EX-99.1

Mistras Group Announces First Quarter 2020 Results Revenue for the Quarter Exceeds Forecast Cash on hand Increased from Year End Selling, General & Administrative Expense Run Rate Reduced Strategic Actions Implemented to Lower Costs Further in 2020

Exhibit 99.1 Mistras Group Announces First Quarter 2020 Results Revenue for the Quarter Exceeds Forecast Cash on hand Increased from Year End Selling, General & Administrative Expense Run Rate Reduced Strategic Actions Implemented to Lower Costs Further in 2020 Highlights of the First Quarter 2020* •Revenue of $159.5 million, exceeding forecast •Cash from operations of $6.1 million •Credit facilit

May 19, 2020 EX-10.2

Form of Restricted Stock Unit Certificate for awards to senior officers under the 2016 Long-Term Incentive Plan (filed as exhibit 10.2 to the Quarterly Report Form 10-Q filed on May 19, 2020 and incorporated herein by reference)

MISTRAS GROUP, INC. RESTRICTED STOCK UNIT CERTIFICATE Granted To: Total Units: Grant Date: Vesting Dates: 1.Award. In accordance with the Mistras Group, Inc. 2016 Long-Term Incentive Plan (the “Plan”), Mistras Group, Inc. (the “Company”) has made an award to you of restricted stock units (the “RSUs”). Each RSU, upon vesting, will become one share of the Company’s common stock. The award and the RS

May 19, 2020 10-Q

Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ý QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2020 Or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 00

May 15, 2020 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 15, 2020 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001- 34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incorp

May 15, 2020 EX-10.1

Third Amendment, dated May 15, 2020, to Fifth Amended and Restated Credit Agreement dated December 13, 2018 (filed as Exhibit 10.1 to the Current Report on Form 8-K filed May 15, 2020 and incorporated herein by reference

THIRD AMENDMENT TO FIFTH AMENDED AND RESTATED CREDIT AGREEMENT THIS THIRD AMENDMENT TO FIFTH AMENDED AND RESTATED CREDIT AGREEMENT (hereinafter referred to as this “Amendment”), dated as of May 15, 2020, is executed by and among, MISTRAS GROUP, INC.

May 11, 2020 8-K

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 11, 2020 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001- 34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incorp

May 5, 2020 DEFA14A

- DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant  Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for the Us

April 9, 2020 DEF 14A

MG / Mistras Group Inc. DEF 14A - - DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Definitive

April 9, 2020 DEFA14A

MG / Mistras Group Inc. DEFA14A - - DEFA 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for the Us

April 6, 2020 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 1, 2020 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001- 34481 22-3341267 (State of incorporation) (Commission File Number) (IRS Employer

April 2, 2020 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 1, 2020 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001- 34481 22-3341267 (State of incorporation) (Commission File Number) (IRS Employer

March 27, 2020 EX-10.3

First Amendment, dated October 11, 2019, to Fifth Amended and Restated Credit Agreement dated December 13, 2018

FIRST AMENDMENT TO FIFTH AMENDED AND RESTATED CREDIT AGREEMENT THIS FIRST AMENDMENT TO FIFTH AMENDED AND RESTATED CREDIT AGREEMENT (hereinafter referred to as this “Amendment”), dated as of October 11, 2019, is executed by and among, MISTRAS GROUP, INC.

March 27, 2020 EX-4.2

Description of Securities Registered Under Section 12 of the Securities Exchange Act of 1934

Exhibit 4.2 Description of the Registrant’s Securities Registered Under Section 12 of the Securities Exchange Act of 1934 Mistras Group, Inc. (“Mistras,” the “Company,” “we” or “our”) has one class of securities registered under Section 12 of the Securities Exchange Act of 1934 – common stock, par value $0.01 per share. The following is a summary of the material terms of the common stock of Mistra

March 27, 2020 EX-21.1

Subsidiaries of the Registrant

EX-21.1 4 a20191231subsidiarylis.htm EX-21.1 Exhibit 21.1 The following is a list of subsidiaries of the registrant. The list omits some subsidiaries which, in the aggregate, would not constitute a significant subsidiary. Name Jurisdiction of Organization Aetos Group, Inc. Delaware Assistances Controles Technologies France CISMIS Springfield Corp. Delaware Conam Inspection and Engineering Services

March 27, 2020 10-K

Annual Report - 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K ý ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2019 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 001-34481 Mistras Group, Inc. (Exact

March 26, 2020 EX-99.1

Mistras Group Announces Fourth Quarter and Full Year 2019 Results Record Annual Revenue of $749 million Full 2019 Gross Margin Expands by 100 basis points to 29% Full 2019 Operating Cash Flow Up 42% to $59 million

Exhibit 99.1 Mistras Group Announces Fourth Quarter and Full Year 2019 Results Record Annual Revenue of $749 million Full 2019 Gross Margin Expands by 100 basis points to 29% Full 2019 Operating Cash Flow Up 42% to $59 million Highlights of the Fourth Quarter 2019* •Cash flows from operations of $18.6 million, up 6.6% •Free cash flow of $13.7 million, up 12.9% •Debt repayment of $13.1 million •SG&

March 26, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 25, 2020 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001- 34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of inco

March 17, 2020 NT 10-K

MG / Mistras Group Inc. NT 10-K - - NT 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 12b-25 NOTIFICATION OF LATE FILING (Check one):  Form 10-K  Form 20-F  Form 11-K  Form 10-Q  Form 10-D  Form N-CEN  Form N-CSR For Period Ended: December 31, 2019  Transition Report on Form 10-K  Transition Report on Form 20-F  Transition Report on Form 11-K  Transition Report on Form 10-Q For the Transition Period Ended: Nothing in this form shall be construed to imply that the Commission has verified any information contained herein.

March 13, 2020 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 9, 2020 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001- 34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incor

March 13, 2020 EX-10.1

Second Amendment, dated March 9, 2020, to Fifth Amended and Restated Credit Agreement dated December 13, 2018 (filed as Exhibit 10.1 to the Current Report on Form 8-K filed March 13, 2020 and incorporated herein by reference

SECOND AMENDMENT TO FIFTH AMENDED AND RESTATED CREDIT AGREEMENT THIS SECOND AMENDMENT TO FIFTH AMENDED AND RESTATED CREDIT AGREEMENT (hereinafter referred to as this “Amendment”), dated as of March 9, 2020, is executed by and among, MISTRAS GROUP, INC.

February 14, 2020 SC 13G/A

MG / Mistras Group Inc. / Vahaviolos Sotirios J. - SC 13G/A Passive Investment

CUSIP No. 60649T 107 SCHEDULE 13G 1 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 10)* Mistras Group, Inc. (Name of Issuer) Common Stock, $0.01 par value (Title of Class of Securities) 60649T 107 (CUSIP Number) December 31, 2019 (Date of Event Which Requires Filing of this Statement) Check the appropria

February 13, 2020 SC 13G

MG / Mistras Group Inc. / Mistras Group, Inc. - SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 10)* Mistras Group, Inc. (Name of Issuer) Common Stock, $0.01 par value (Title of Class of Securities) 60649T 107 (CUSIP Number) December 31, 2019 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuan

February 12, 2020 SC 13G

MG / Mistras Group Inc. / DIMENSIONAL FUND ADVISORS LP - SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* MISTRAS GROUP INC (Name of Issuer) Common Stock (Title of Class of Securities) 60649T107 (CUSIP Number) December 31, 2019 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedu

February 12, 2020 SC 13G/A

MG / Mistras Group Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 2)* Name of issuer: Mistras Group Inc Title of Class of Securities: Common Stock CUSIP Number: 60649T107 Date of Event Which Requires Filing of this Statement: December 31, 2019 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ R

November 6, 2019 10-Q

Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ý QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2019 Or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file numbe

November 4, 2019 EX-99.1

MISTRAS Group Announces Third Quarter 2019 Results Strong Q3 Cash Flow from Operations of $19 million, with Gross Margin Expansion to 30%

Exhibit 99.1 MISTRAS Group Announces Third Quarter 2019 Results Strong Q3 Cash Flow from Operations of $19 million, with Gross Margin Expansion to 30% Highlights of the Third Quarter and Year-to-Date 2019* • Q3 revenue up 6% to $192.2 million • Q3 gross profit up 10% to $57.8 million and gross margin expanded 140 basis points to 30.1% • Q3 operating income up 257% to $10.8 million • Q3 net income

November 4, 2019 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 4, 2019 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001- 34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of in

August 12, 2019 SC 13G/A

MG / Mistras Group Inc. / Wellington Management Group LLP - SEC SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 6 )* Mistras Group, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 60649T107 (CUSIP Number) July 31, 2019 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedu

August 6, 2019 10-Q

MG / Mistras Group Inc. 10-Q - Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ý QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2019 Or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001

August 5, 2019 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 5, 2019 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001- 34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of inco

August 5, 2019 EX-99.1

MISTRAS Group Announces Second Quarter 2019 Results Revenue of $201 million, operating income of $15 million and diluted EPS of $0.26

Exhibit 99.1 MISTRAS Group Announces Second Quarter 2019 Results Revenue of $201 million, operating income of $15 million and diluted EPS of $0.26 Highlights of the Second Quarter 2019* • Q2 revenue up 5% to $200.6 million • Q2 gross profit up 9% to $60.1 million and gross margin expands 120 basis points to 29.9% • Q2 operating income up 50% to $15.4 million • Q2 net income up 24% to $7.4 million

May 23, 2019 EX-1.01

Conflict Minerals Report of Mistras Group, Inc. in Accordance with Rule 13p-1 under the Securities Exchange Act of 1934

Exhibit 1.01 Conflict Minerals Report of Mistras Group, Inc. in Accordance with Rule 13p-1 under the Securities Exchange Act of 1934 This is the Conflict Minerals Report of Mistras Group, Inc. (“Mistras”) for calendar year 2018 in accordance with Rule 13p-1 (“Rule 13p-1”) under the Securities Exchange Act of 1934 (the “1934 Act”). Please refer to Rule 13p-1, Form SD and the 1934 Act Release No. 34

May 23, 2019 SD

MG / Mistras Group Inc. SD - - SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001-34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incorporation or organization) File Number) Identification No.) 195 Clarksville Road, Princeton Junction, New Jersey 08550 (Add

May 16, 2019 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 15, 2019 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001- 34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incorp

May 8, 2019 10-Q

MG / Mistras Group Inc. 10-Q Quarterly Report 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ý QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2019 Or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 00

May 7, 2019 EX-99.1

MISTRAS Group Announces First Quarter 2019 Results Affirms Full Year Guidance with Revenue of $765 - $785 Million, Adjusted EBITDA of $90 - $93 Million and Free Cash Flow of $42 - $45 Million

Exhibit 99.1 MISTRAS Group Announces First Quarter 2019 Results Affirms Full Year Guidance with Revenue of $765 - $785 Million, Adjusted EBITDA of $90 - $93 Million and Free Cash Flow of $42 - $45 Million Highlights of the First Quarter 2019* • Results consistent with guidance outlook for the full year • Q1 gross profit up 2% to $48.9 million • Q1 gross margin expands 190 basis points to 27.6% fro

May 7, 2019 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 6, 2019 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001- 34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of incorpo

April 5, 2019 DEFA14A

MG / Mistras Group Inc. DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive

April 5, 2019 DEF 14A

MG / Mistras Group Inc. DEF 14A

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e

March 18, 2019 10-K

MG / Mistras Group Inc. 10-K (Annual Report)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K ý ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2018 o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 001-34481 Mistras Group, Inc. (Exact na

March 18, 2019 EX-10.11

Mistras Group Severance Plan (filed as Exhibit 10.11 to the Annual Report on Form 10-K filed on March 18, 2019 and incorporated herein by reference)

Exhibit 10.11 Severance Plan [Modified February 28, 2018] MISTRAS GROUP, INC. SEVERANCE PLAN Introduction Due to the competitive nature of the NDT business and the need for executive and managerial talent in the industry, executives and managers of Mistras Group, Inc. (“Mistras”) and its subsidiaries (Mistras and its subsidiaries are collectively referred to as the “Company”) have been and will co

March 18, 2019 EX-21.1

Subsidiaries of the Registrant

Exhibit 21.1 The following is a list of subsidiaries of the registrant. The list omits some subsidiaries which, in the aggregate, would not constitute a significant subsidiary. Jurisdiction of Name Organization 2159562 Alberta Ltd. Canada Aetos Group, Inc. Delaware CISMIS Springfield Corp. Delaware Conam Inspection and Engineering Services, Inc. Delaware Conam Inspection Services Inc. Delaware GMA

March 11, 2019 EX-99.1

MISTRAS Group Announces Fourth Quarter and Full Year 2018 Results Record Annual Revenue of $742 million Fiscal 2018 Gross Margin Expands to 28.0% from 26.8%; Gross Margins Expand in all segments Fourth Quarter Margins of 28.9% Reach Highest Fourth Qu

Exhibit 99.1 MISTRAS Group Announces Fourth Quarter and Full Year 2018 Results Record Annual Revenue of $742 million Fiscal 2018 Gross Margin Expands to 28.0% from 26.8%; Gross Margins Expand in all segments Fourth Quarter Margins of 28.9% Reach Highest Fourth Quarter Margin in Three Years Highlights of the Fourth Quarter 2018* • Q4 gross profit up 4% to $52.3 million • Q4 gross margin expands 210

March 11, 2019 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 11, 2019 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001- 34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of inco

February 28, 2019 EX-99.1

Consolidated Financial Statements and Report of Independent Certified Public Accountants ONSTREAM HOLDINGS INC. AND SUBSIDIARIES December 31, 2017

Exhibit 99.1 Consolidated Financial Statements and Report of Independent Certified Public Accountants ONSTREAM HOLDINGS INC. AND SUBSIDIARIES December 31, 2017 ONSTREAM HOLDINGS INC. TABLE OF CONTENTS Page Report of Independent Certified Public Accountants 1 - 2 Consolidated Financial Statements Consolidated Balance Sheet 3 Consolidated Statement of Operations and Comprehensive Income (Loss) 4 Con

February 28, 2019 EX-99.3

Mistras Group, Inc. UNAUDITED PRO FORMA FINANCIAL INFORMATION

EX-99.3 5 proformafinancialstatements.htm PRO FORMA STATEMENTS Exhibit 99.3 Mistras Group, Inc. UNAUDITED PRO FORMA FINANCIAL INFORMATION On December 13, 2018, Mistras Group, Inc. ("Mistras" or "the Company") completed the acquisition (the "Acquisition") of all of the equity interests of Onstream Holdings, Inc. (“Onstream”), the 100% parent company of Onstream Pipeline Inspection Services Inc. Pri

February 28, 2019 EX-99.2

Condensed Consolidated Financial Statements ONSTREAM HOLDINGS INC. AND SUBSIDIARIES September 30, 2018

Exhibit 99.2 Condensed Consolidated Financial Statements ONSTREAM HOLDINGS INC. AND SUBSIDIARIES September 30, 2018 ONSTREAM HOLDINGS INC. TABLE OF CONTENTS Page Condensed Consolidated Financial Statements Condensed Consolidated Balance Sheet 3 Condensed Consolidated Statements of Operations and Comprehensive Income 4 Condensed Consolidated Statement of Changes in Stockholders’ Equity 5 Condensed

February 28, 2019 8-K/A

Financial Statements and Exhibits, Completion of Acquisition or Disposition of Assets

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K/A (Amendment No. 1) CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 13, 2018 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001- 34481 22-3341267 (State or other jurisdiction (Commissio

February 14, 2019 SC 13G/A

MG / Mistras Group Inc. / Broad Run Investment Management, LLC - MG 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No: 1) Mistras Group, Inc.

February 12, 2019 SC 13G/A

MG / Mistras Group Inc. / Wellington Management Group LLP - SEC SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 5 )* Mistras Group, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 60649T107 (CUSIP Number) December 31, 2018 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Sc

February 11, 2019 SC 13G/A

MG / Mistras Group Inc. / VANGUARD GROUP INC Passive Investment

mistrasgroupinc.htm - Generated by SEC Publisher for SEC Filing SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 1 )* Name of issuer: Mistras Group Inc Title of Class of Securities: Common Stock CUSIP Number: 60649T107 Date of Event Which Requires Filing of this Statement: December 31, 2018 Check the appropriate box to

February 4, 2019 SC 13G/A

MG / Mistras Group Inc. / Vahaviolos Sotirios J. - SC 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 9)* Mistras Group, Inc. (Name of Issuer) Common Stock, $0.01 par value (Title of Class of Securities) 60649T 107 (CUSIP Number) December 31, 2018 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant

December 13, 2018 EX-99.1

MISTRAS Group Announces Acquisition of Onstream Pipeline Inspection For $143 Million And Increases Fiscal 2018 Revenue Guidance to $740 Million

Exhibit 99.1 MISTRAS Group Announces Acquisition of Onstream Pipeline Inspection For $143 Million And Increases Fiscal 2018 Revenue Guidance to $740 Million • Acquires a leading, proprietary, technology-enabled pipeline inspection and data analytics platform • Adds a complementary, fast-growing, highly-profitable leader in the North American small to mid-bore pipeline inspection market • Accelerat

December 13, 2018 EX-2.2

Form of share purchase agreement for the purchase of Onstream Holdings, Inc. shares from each member of the group of shareholders collectively owning 5% of the shares of Onstream Holdings, Inc. (filed as Exhibit 2.2 to Current Report on Form 8-K filed December 13, 2018 and incorporated herein by reference)

EXECUTION COPY Exhibit 2.2 THIS SHARE PURCHASE AGREEMENT is made as of December , 2018, AMONG: THE PERSON INDICATED AS “VENDOR” ON THE EXECUTION PAGE OF THIS AGREEMENT (the “Vendor”) AND: 2159562 ALBERTA LTD., a corporation duly constituted under the laws of Alberta; (the “Purchaser” and, collectively with the Vendor, the “Parties”, each a “Party”) WHEREAS the Vendor is the owner of those Class C

December 13, 2018 EX-10.1

Fifth Amended and Restated Credit Agreement dated December 13, 2018 (filed as Exhibit 10.1 to the Current Report on Form 8-K filed December 13, 2018 and incorporated herein by reference)

Exhibit 10.1 Published CUSIP Number: 60649XAC2 FIFTH AMENDED AND RESTATED CREDIT AGREEMENT Dated December , 2018 By and among MISTRAS GROUP, INC., as the Borrower, BANK OF AMERICA, N.A., as Administrative Agent, a Lender and L/C Issuer, and The Lenders Party Hereto MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED, as Sole Lead Arranger, Sole Bookrunner, and Syndication Agent and JPMORGAN CHASE B

December 13, 2018 8-K

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, Completion of Acquisition or Disposition of Assets

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 13, 2018 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001- 34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of i

December 13, 2018 EX-2.1

Share Purchase Agreement, dated as of December 13, 2018, among 2159562 Alberta Ltd., as purchaser, Mistras Group, Inc., as parent of purchaser, the shareholders of Onstream Holdings, Inc. listed in Schedule A thereto, and Onstream Holdings, Inc. (filed as Exhibit 2.1 to Current Report on Form 8-K filed December 13, 2018 and incorporated herein by reference)

EXECUTION COPY Exhibit 2.1 SHARE PURCHASE AGREEMENT AMONG THE PERSONS LISTED IN SCHEDULE 2.1A HERETO, AS VENDORS, AND 2159562 ALBERTA LTD., AS PURCHASER, AND MISTRAS GROUP, INC., AS PARENT, AND ONSTREAM HOLDINGS INC. DATED AS OF DECEMBER 13, 2018 - i - TABLE OF CONTENTS Page Article 1 INTERPRETATION 2 1.1 Definitions 2 1.2 Articles, Sections and Headings 2 1.3 Extended Meanings 2 1.4 Accounting Pr

November 6, 2018 10-Q

MG / Mistras Group Inc. 10-Q (Quarterly Report)

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ý QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2018 Or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period to Commission file number 001

November 5, 2018 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 5, 2018 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001- 34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of in

November 5, 2018 EX-99.1

Mistras Group, Inc. and Subsidiaries Condensed Consolidated Balance Sheets (in thousands, except share and per share data)

EX-99.1 2 a93018exhibit991.htm PRESS RELEASE Exhibit 99.1 Mistras Group Announces Third Quarter Results Highlights of the Third Quarter 2018* • $182.2 million of revenues; increased 1% • Gross Margins of 29%; increased 200 basis points • $3.0 million of income from operations (GAAP) • $10.1 million of adjusted income from operations (non-GAAP), up 46% • $20.8 million of adjusted EBITDA; increased

August 7, 2018 10-Q

MG / Mistras Group Inc. 10-Q (Quarterly Report)

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ý QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2018 Or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period to Commission file number 001- 344

August 6, 2018 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 6, 2018 Mistras Group, Inc. (Exact name of registrant as specified in its charter) Delaware 001- 34481 22-3341267 (State or other jurisdiction (Commission (IRS Employer of inco

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