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. 28.7% of the shares are freely tradable; institutional investors hold 62.5%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Mill Road Capital Management LLC | 5.87 | 1,870,580 | +11.8 | 03/31/2026 |
| Dimensional Fund Advisors, Inc. | 5.34 | 1,700,793 | -0.2 | 06/30/2026 |
| Royce & Associates, LP | 4.81 | 1,533,052 | +7.9 | 03/31/2026 |
| Weber Capital Management LLC | 4.55 | 1,448,154 | -0.6 | 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 | 2.92 | 930,178 | +0.0 | 03/31/2026 |
| BlackRock Inc | 2.70 | 859,452 | -2.4 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 2.55 | 813,148 | +0.0 | 07/31/2026 |
| Acuitas US Microcap Strategy | 2.29 | 729,160 | +0.0 | 06/30/2026 |
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 | 77,689,616 $ | Sep 10, 2026 | indirect |
| Vahaviolos Aspasia Felice | 10% Owner | 2,154,541 | 42,659,912 $ | Sep 10, 2026 | direct |
| Shuman-Fabbri Natalia | President and CEO | 123,780 | 2,450,844 $ | Sep 8, 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 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: September 17, 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.