X0206 3 2025-12-31 0 0001436126 Mistras Group, Inc. MG 0002102046 2025 Irrevocable Two-Year Grantor Retained Annuity Trust of Aspasia F. Vahaviolos C/O STEPHANIE FOGLIA 504 HIRAM ROAD PLYMOUTH MEETING PA 19462 0 0 1 0 Common Stock 5251358 D Reporting person ("GRAT") was established by the grantor, Aspasia F. Vahaviolos. The shares were acquired by a gift from Mrs. Vahaviolos. Mrs. Vahaviolos' daughter, who does not reside with her, is the trustee for the trust and holds sole power over the voting and disposition of the shares of Mistras Group common stock held by the GRAT. Mrs. Vahaviolos and the GRAT trustee have agreed that the GRAT will be subject to the Issuer's insider trading compliance policy regarding the shares of common stock of the Issuer held by the GRAT because of the managerial position held by the trustee with the issuer /s/ Stephanie Foglia, Trustee 2026-02-16