Institutional Ownership
Mistras Group Inc
CUSIP 60649T107COMMGQ1 2026
13D / 13G Filings
23
Schedule 13D/13G on record
Beneficial Filers
11
Distinct reporting persons
Largest Stake
35.7%
Max % of class reported
Institutional Holders
124
13F filers (latest quarter)
Beneficial Owners — Schedule 13D / 13G
23 filings · latest Sep 11, 2025
| # | Filed | Reporting Person | Form | % of Class | Shares | Filing |
|---|---|---|---|---|---|---|
| 1 | Sep 11, 2025 | Stephanie Foglia | 13G | 5.1% | 1.60M | SEC |
| 2 | Sep 11, 2025 | Kristy Kyriakopoulos | 13G | 5.3% | 1.67M | SEC |
| 3 | Sep 11, 2025 | Aspasia Vahaviolos | 13G | 19.4% | 6.11M | SEC |
| 4 | Jul 15, 2025 | Dimensional Fund Advisors LP | 13G | 5.2% | 1.62M | SEC |
| 5 | Mar 10, 2025 | Mill Road Capital III, L.P. | 13D/A | 5.7% | — | SEC |
| 6 | Jul 9, 2024 | Mill Road Capital III, L.P. | 13D | 5.2% | 1.60M | SEC |
| 7 | Feb 14, 2024 | Vahaviolos Sotirios J. | 13G/A | 6.0% | 1.84M | SEC |
| 8 | Feb 14, 2024 | Sotirios Vahaviolos January 2023 2-Year Grantor Retained Annuity Trust | 13D/A | 22.0% | 6.73M | SEC |
| 9 | Feb 14, 2024 | Sotirios Vahaviolos January 2023 2-Year Grantor Retained Annuity Trust | 13D | 22.0% | 6.73M | SEC |
| 10 | Feb 14, 2024 | Vahaviolos Sotirios J. | 13G/A | 6.0% | 1.84M | SEC |
13 more beneficial-ownership filings on Premium
See the full Schedule 13D/13G history for Mistras Group Inc.
Unlock full historyTop Institutional Holders (13F)
Largest reported positions · latest quarter
| # | Fund | Shares | Value |
|---|---|---|---|
| 1 | Mill Road Capital Management LLC | 1.87M | $27.65M |
| 2 | Dimensional Fund Advisors LP | 1.70M | $25.18M |
| 3 | Royce & Associates LP | 1.53M | $22.66M |
| 4 | Weber Capital Management LLC /Adv | 1.46M | $21.53M |
| 5 | Ies Holdings, Inc. | 1.12M | $16.56M |
| 6 | Blackrock, Inc. | 859.5K | $12.70M |
| 7 | Federated Hermes, Inc. | 656.0K | $9.70M |
| 8 | Clearline Capital LP | 554.1K | $8.19M |
| 9 | Invenomic Capital Management LP | 452.6K | $6.69M |
| 10 | Deutsche Bank AG\ | 379.5K | $5.61M |