Mistras Group, Inc.
A global provider of technology-enabled asset integrity and testing services, Mistras Group checks the health of critical equipment and infrastructure. Its teams perform non-destructive testing (NDT), pipeline inspections, and in-house lab work, with the OneSuite cloud platform pulling asset data into predictive analytics and its PCMS software used by about half of U.S. refiners. Customers span oil & gas, aerospace & defense, power generation, and civil infrastructure.
Sold 4.0K
Granted 257.0K · Bought 35.0K
Granted 33.3K · Bought 28.9K
Granted 4.5K · Sold 105.0K
Granted 33.3K
Granted 82.0K
Granted 126.2K
Granted 7.0K · Sold 10.0K
Granted 33.3K
Granted 22.1K
Granted 33.3K
Granted 67.2K · Sold 21.0K
Granted 94.7K
Granted 50.6K
Granted 22.2K
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| 2025 Irrevocable Two-Year Grantor Retained Annuity Trust of Aspasia F. Vahaviolos +1 co-filer10% owner · 6 transactions | — | 5.76M | — | — | 4.0K |
| Vahaviolos Sotirios J.Director, 10% owner · 4 transactions | +107.8% | 3.89Mas of Mar 2024 | — | — | — |
| Vahaviolos Aspasia Felice10% owner · 4 transactions | — | 1.79M | — | — | — |
| Stamatakis Manuel N.Executive Chairman, Director · 8 transactions | +133.2% | 509.8K | 257.0K | 35.0K | — |
| Debenedictis NicholasDirector · 12 transactions | +29.4% | 273.8K | 33.3K | 28.9K | — |
| Lange Michael J.Senior EVP · 13 transactions | -30.9% | 240.5Kas of Sep 2024 | 4.5K | — | 105.0K |
| Forese James JDirector · 4 transactions | +23.2% | 177.0K | 33.3K | — | — |
| Prajzner Edward JSr. EVP and CFO · 17 transactions | +68.7% | 148.1K | 82.0K | — | — |
| Shuman-Fabbri NataliaPresident and CEO, Director · 2 transactions | — | 126.2K | 126.2K | — | — |
| Smith John AnthonyExecutive Vice President · 3 transactions | — | 100.4Kas of Apr 2024 | 7.0K | — | 10.0K |
| Lohmeier MichelleDirector · 4 transactions | +50.5% | 99.2K | 33.3K | — | — |
| Keefe Michael CEVP, General Counsel · 9 transactions | +14.9% | 91.6Kas of Mar 2025 | 22.1K | — | — |
| Pizzi Charles PDirector · 5 transactions | +73.6% | 73.5K | 33.3K | — | — |
| Glanton Richard HDirector · 8 transactions | +184.1% | 71.2K | 67.2K | — | 21.0K |
| Hammad Hanei WailEVP & Chief Operating Officer · 7 transactions | — | 61.8K | 94.7K | — | — |
| D'Alterio Gennaro A.EVP, Chief Commercial Officer · 11 transactions | — | 47.2K | 50.6K | — | — |
| Coggins Eileen MaryEVP, General Counsel · 2 transactions | — | 22.2K | 22.2K | — | — |
| Sotirios Vahaviolos January 2023 2-Year Grantor Retained Annuity Trust10% owner · 2 transactions | -100% | 0as of Jul 2025 | — | — | — |
Select a row to see that insider’s individual transactions. Sum of the holdings confirmed in the 12 months before this insider's last filing. A Form 4 reports a holding per line — held directly, or through a named trust, partnership or foundation, and in each share class separately — never a person’s total. Lines not restated in that time are left out and shown apart: an active filer restates what they still hold, so a line they did not restate is more often an entity since renamed, whose shares a successor line reports too. An amber marker means some were left out.
Net open-market activity over the last 3 years: -76.1K shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.