Mistras Group Inc. (MG)
NYSE: MG · Services-Engineering Services · Princeton Junction, NJ · filing with the SEC since 2008
Grade3.7
◀ Past 3.2● Present 3.4▶ Future 4.7
Who owns Mistras Group Inc.
As filed with the SECHolders of 5% or more
5
Aspasia Felice Vahaviolos holds 19.2% of Common Stock, $0.01 par value, as its SCHEDULE 13G/A filed Aug 13, 2026 says.
Directors and officers
11
report now, of 19 people on the record since 2009. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 5 named at left.
Holders of 5% or moreshare of the class, as filed
Aspasia Felice Vahaviolos
SCHEDULE 13G/A · filed Aug 13, 2026 · Common Stock, $0.01 par value · 19.3% in Mar 31, 2026
Aspasia Felice Vahaviolos
SCHEDULE 13D/A · filed Oct 7, 2026 · Common Stock, $0.01 par value · 19.1% in Sep 21, 2026
Mill Road Capital III, L.P.
SCHEDULE 13D/A · filed Sep 18, 2026 · Common stock, $0.01 par value · 5.9% in Apr 23, 2026
Dimensional Fund Advisors LP
SCHEDULE 13G · filed Jul 15, 2025 · Common Stock
Kristy Kyriakopoulos
SCHEDULE 13G/A · filed Mar 31, 2026 · Common Stock, $0.01 par value · 5.3% in Sep 11, 2025
What MG reports owning in othersstakes of 5% or more, and other ties
31 subsidiaries in 11 countries, from the list filed with the 10-K filed Mar 11, 2026.
Insider tradesForm 4
0sales
0purchases
0sales on a scheduled plan
0people selling
$0sold, in dollars
$0bought, in dollars
Open-market trades on Form 4 from Oct 7, 2025 to Oct 7, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2025 runs to Oct 7, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window1 of 23 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Foglia Stephanie Athena | 10% owner | 4 | $100,000 | 0 | 0 | $0 |