Mistras Group, Inc. 10-Q

ITEM 5. Other Information Rule 10b5-1 Trading Plans During the three and six months ended June 30, 2025, none of the Company's directors or officers, as defined in Section 16 of the Securities Exchange Act of 1934, adopted or terminated a "Rule 10b5-1 trading arrangement" or a "non-Rule 10b5-1 trading arrangement," as each term is defined in Item 408(a) of Regulation S-K of the Securities Exchange Act of 1934. During the three and six months ended June 30, 2025, the Company did not adopt, terminate or modify a Rule 10b5-1 trading arrangement. 37 Table of Contents ITEM 6. Exhibits Exhibit No. Description 31.1 Certification of Chief Executive Officer pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934. 31.2 Certification of Chief Financial Officer pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934. 32.1 Certification pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. 101.INS Inline XBRL Instance Document 101.SCH Inline XBRL Schema Document 101.CAL Inline XBRL Calculation Linkbase Document 101.LAB Inline XBRL Labels Linkbase Document 101.PRE Inline XBRL Presentation Linkbase Document 101.DEF Inline XBRL Definition Linkbase Document 38 Table of Contents Signatures Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. MISTRAS GROUP, INC. By: /s/ Edward J. Prajzner Edward J. Prajzner Senior Executive Vice President and Chief Financial Officer (Principal Financial and Accounting Officer and duly authorized officer) Date: August 11, 2025 39