Mistras Group, Inc.
Mistras Group, Inc. (MG) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · MG · as of Sep 30, 2025
Ownership Breakdown
115
Institutional Holders
▲ 2 vs Q2
$156.62M
Total Inst. Value
▲ $31.46M vs Q2
31.82M
Shares Outstanding
freeFloat 55.53%
15.92M
13F Shares Held
▲ 288,761 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
MG largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
MILL ROAD CAPITAL MANAGEMENT LLC services-engineering services | 1.67M | 5.35% | 5.35% | $16.46B | Nov 14, 2025 | ▲ 4.7K |
DIMENSIONAL FUND ADVISORS LP services-engineering services | 1.63M | 5.22% | 5.22% | $16.07B | Nov 12, 2025 | ▲ 10.2K |
ROYCE & ASSOCIATES LP services-engineering services | 1.34M | 4.29% | 4.29% | $13.21B | Nov 12, 2025 | ▲ 71.5K |
VANGUARD GROUP INC services-engineering services | 1.17M | 3.73% | 3.73% | $11.46B | Nov 7, 2025 | ▼ 29.9K |
BLACKROCK, INC. services-engineering services | 1.06M | 3.38% | 3.38% | $10.41B | Nov 12, 2025 | ▼ 165.9K |
CLEARLINE CAPITAL LP services-engineering services | 698.8K | 2.23% | 2.23% | $6.88B | Nov 14, 2025 | — held |
FEDERATED HERMES, INC. services-engineering services | 680.2K | 2.18% | 2.18% | $6.69B | Nov 3, 2025 | ▼ 580 |
ACUITAS INVESTMENTS, LLC services-engineering services | 643.5K | 2.06% | 2.06% | $6.33B | Nov 18, 2025 | ▲ 219.4K |
INVENOMIC CAPITAL MANAGEMENT LP services-engineering services | 472.5K | 1.51% | 1.51% | $4.65B | Nov 14, 2025 | NEW |
J. GOLDMAN & CO LP services-engineering services | 421.9K | 1.35% | 1.35% | $4.15B | Nov 14, 2025 | ▼ 342.0K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
16
Increased
+1.06M shares3
New Positions
first time holders24
Decreased
−1.17M shares0
Sold Out
fully exitedNet shares change (top 50)
108.6K
+1.06M / −1.17M
Net new holders
-5
3 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
MG insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
0
Buy transactions
0
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Vahaviolos Aspasia Felice 10 percent owner | Dec 31, 2025 | Gift | 528,672 | — | — | 1.38M | Form 4 ↗ |
Foglia Stephanie Athena 10 percent owner | Apr 27, 2026 | Gift | 528,672 | — | — | 4.72M | Form 4 ↗ |
Foglia Stephanie Athena 10 percent owner | Jan 5, 2026 | Sale | 1,000 | $13.60 | $13.6K | 4.7K | Form 4 ↗ |
Foglia Stephanie Athena 10 percent owner | Feb 3, 2026 | Sale | 1,000 | $14.60 | $14.6K | 3.7K | Form 4 ↗ |
Foglia Stephanie Athena 10 percent owner | Mar 3, 2026 | Sale | 1,000 | $15.50 | $15.5K | 2.7K | Form 4 ↗ |
Foglia Stephanie Athena 10 percent owner | Apr 17, 2026 | Sale | 1,000 | $18.00 | $18.0K | 1.7K | Form 4 ↗ |
DEBENEDICTIS NICHOLAS director | May 19, 2026 | Award | 6,862 | — | — | 248.8K | Form 4 ↗ |
GLANTON RICHARD H director | May 19, 2026 | Award | 6,862 | — | — | 68.4K | Form 4 ↗ |
FORESE JAMES J director | May 19, 2026 | Award | 6,862 | — | — | 177.0K | Form 4 ↗ |
Lohmeier Michelle director | May 19, 2026 | Award | 6,862 | — | — | 99.2K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Mistras Group, Inc. (MG) is primarily owned by institutional investors, who hold approximately 50.0% of total shares outstanding. Company insiders own approximately 44.47%, while retail and public investors account for the remaining 5.51%.
The largest institutional shareholder of Mistras Group, Inc. is MILL ROAD CAPITAL MANAGEMENT LLC, holding approximately 1.67 million shares — equal to 5.35% of outstanding shares — as of September 30, 2025.
A total of 115 institutional investors currently hold MG stock, with a combined institutional value of approximately $156,623,918 as of the most recent 13F filing period.
Frequently asked questions
MG ownershipMistras Group, Inc. (MG) is primarily owned by institutional investors, who hold approximately 50.0% of shares. The largest shareholder is MILL ROAD CAPITAL MANAGEMENT LLC with a 5.35% stake. Company insiders hold 44.47%. Data sourced from SEC Form 13F as of September 30, 2025.