X0202 SCHEDULE 13G/A 0002082695 XXXXXXXX LIVE 1 Common Stock, $0.01 par value 07/08/2025 0001436126 Mistras Group, Inc. 60649T107 195 Clarksville Road Princeton Junction NJ 08550 Rule 13d-1(c) Kristy Kyriakopoulos X1 1617006.00 0.00 1617006.00 0.00 1617006.00 N 5.12 IN This Amendment No. 1 to Schedule 13G ("Amendment No. 1") to the Schedule 13G originally filed with the United States Securities and Exchange Commission on September 11, 2025 (the "Original Schedule 13G"), relating to the issuer's common shares, is being filed solely to correct an administrative error in the Original Schedule 13G. This Amendment No. 1 corrects the number of shares reported as beneficially owned by the Reporting Person. Unless amended or supplemented below, the information in the Original Schedule 13G remains unchanged. Mistras Group, Inc. 195 Clarksville Road, Princeton Junction, NJ 08550 Kristy Kyriakopoulos 2 Suffolk Lane Princeton Junction, NJ 08550 United States of America Y 1,617,006 5.12%* * This percentage calculation is based on 31,595,562 outstanding shares as of March 9, 2026 as reported by the issuer. 1,617,006 0 1,617,006 0 Y Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. Kristy Kyriakopoulos /s/Kristy Kyriakopoulos 03/31/2026