Mistras Group Inc
Ownership
Ownership Structure
Who owns Mistras Group Inc (MG)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 41.6% of the shares are freely tradable; institutional investors hold 62.5%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Mill Road Capital Management LLC | 6.05 | 1,929,509 | +3.2 | 06/30/2026 |
| Dimensional Fund Advisors, Inc. | 5.34 | 1,700,793 | -0.2 | 06/30/2026 |
| Royce & Associates, LP | 4.96 | 1,580,728 | +3.1 | 06/30/2026 |
| Weber Capital Management LLC | 4.27 | 1,360,146 | -6.1 | 09/30/2026 |
| BlackRock Inc | 3.66 | 1,166,197 | +35.7 | 06/30/2026 |
| IES Holdings Inc | 3.53 | 1,124,235 | +0.3 | 06/30/2026 |
| Arnhold & S. Bleichroeder Advisers, LLC | 3.48 | 1,107,710 | +293.5 | 06/30/2026 |
| Vanguard Capital Management, LLC | 3.30 | 1,052,512 | +13.2 | 06/30/2026 |
| Federated Hermes Inc | 2.06 | 656,032 | +0.0 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Royce Small-Cap Opportunity Invmt | 1.70 | 540,929 | -2.8 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Foglia Stephanie Athena | 10% Owner | 3,923,718 | 79,259,104 $ | Sep 10, 2026 | indirect |
| Vahaviolos Aspasia Felice | 10% Owner | 2,154,541 | 43,521,728 $ | Sep 10, 2026 | direct |
| Shuman-Fabbri Natalia | President and CEO | 123,780 | 2,500,356 $ | Sep 8, 2026 | direct |
| D'Alterio Gennaro A. | EVP, Chief Commercial Officer | 46,577 | 940,855 $ | Sep 20, 2026 | direct |
| Coggins Eileen Mary | Chief Legal Officer | 13,364 | 269,953 $ | Sep 18, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 20, 2026 | D'Alterio Gennaro A. | EVP, Chief Commercial Officer | Other | 662 | 20.75 | 13,737 |
| Sep 18, 2026 | Coggins Eileen Mary | Chief Legal Officer | Other | 1,636 | 19.66 | 32,164 |
| Sep 10, 2026 | Vahaviolos Aspasia Felice | 10% Owner | Other | 387,093 | 0.00 | – |
| Sep 10, 2026 | Foglia Stephanie Athena | 10% Owner | Other | 387,093 | 0.00 | – |
| Sep 8, 2026 | Shuman-Fabbri Natalia | President and CEO | Other | 2,410 | 19.42 | 46,802 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: October 30, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.