Security key
60649T107
Mistras Group, Inc. - Common Stock, $0.01 par value (MG)
CUSIP: 60649T107
Q1 2026 13F Holders as of 31 Mar 2026
- Security type / class
- Equity / Common Stock, $0.01 par value
- Total 13F shares
- 18,265,932
- Total 13F value
- $269,953,813
- Share change
- +680,733
- SEC-reported price per share
- $14.78
- Number of holders
- 129
- Value change
- +$10,684,415
- Number of buys
- 54
- Number of sells
- 57
- Shares outstanding
- 31,800,260
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q1 2026
Institutions
129
Top holders
10
MG full security history
Ownership snapshot
Full 13F holder table
Mistras Group, Inc. SEC filings
Mistras Group, Inc. company facts
Broader feeds
Ownership snapshot
Top reported holders of MG - Mistras Group, Inc. - Common Stock, $0.01 par value (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
DIMENSIONAL FUND ADVISORS LP
Disclosed value leader
Kristy Vahaviolos Kyriako...
Comparable rows
15/15
Latest evidence
26 Mar 2026
13F
13D/G
3/4/5
Lead comparable stake: 5.2%
13D/G row: DIMENSIONAL FUND ADVISORS LP
Showing 1-6 of 15 holder rows.
Quick read
DIMENSIONAL FUND ADVISORS LP leads the comparable SEC ownership view at 5.2%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens DIMENSIONAL FUND ADVISORS LP's linked filing trail.
Comparable ownership
Top 5
DIMENSIONAL FUND ADVISORS LP
5.2%
Kristy Vahaviolos Kyriakopoulos
5.1%
Manuel N. Stamatakis
1.6%
Edward J. Prajzner
0.47%
Hanei W. Hammad
0.19%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| DIMENSIONAL FUND ADVISORS LP |
13F
13D/G
Company
|
5.2%
from 13D/G
|
$21,098,467
1,667,846 shares
|
— | 31 Dec 2025 |
| Kristy Vahaviolos Kyriakopoulos |
13D/G
Kristy Kyriakopoulos
|
5.1%
|
$25,354,654
1,617,006 shares
|
$0 | 08 Jul 2025 |
| Manuel N. Stamatakis |
3/4/5
Executive Chairman, Director
|
1.6%
|
$7,478,692
509,795 shares
|
— | 04 Mar 2026 |
| Edward J. Prajzner |
3/4/5
Sr. EVP and CFO
|
0.47%
|
$2,197,447
148,076 shares
|
— | 22 Mar 2026 |
| Hanei W. Hammad |
3/4/5
EVP & Chief Operating Officer
|
0.19%
|
$781,479
61,777 shares
|
— | 26 Mar 2026 |
| Gennaro A. D'Alterio |
3/4/5
EVP, Chief Commercial Officer
|
0.15%
|
$692,996
47,239 shares
|
— | 04 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q1 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
129
Shares
18,265,932
Rows available
129
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q1 2026 vs Q1 2026 Across Filers
Q1 2026 holders
129
Q1 2026 holders
129
Holder diff
0
| Investor | Q1 2026 Shares | Q1 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q1 2026 value | Value change | Value Chg % |
|---|