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Mistras Group Inc (MG)

CUSIP: 60649T107 | NYSE | Industrials · Security & Protection Services | Small Cap | 457 institutional holders

Quarters

Q3 2026Q2 2026Q1 2026Q4 2025Q3 2025
CompareDetailedHistoricalFundsOptions13D/13GPeersTargetingTrading SummaryProfile

Beneficial Ownership — 13D / 13G

Full history →

5%+ stakes reported outside the quarterly cycle. A 13D is due within five business days of the event below, so these figures lead the holders table until the filer's next 13F catches up to them.

HolderShares% of ClassChangeEvent Datevs 13F
13D/AAspasia Felice Vahaviolos
with Stephanie Athena Foglia, 2025 Irrevocable Two-Year Grantor Retained Annuity Trust of Aspasia F. Vahaviolos
6,084,50819.1%−21,142Sep 17, 2026No 13F filer matched
13D/AAspasia Felice Vahaviolos
with 2025 Irrevocable Two-Year Grantor Retained Annuity Trust of Aspasia F. Vahaviolos
6,078,25919.1%New 5%+ stakeSep 17, 2026No 13F filer matched
13D/AMill Road Capital III GP LLC1,938,3166.1%+67,736Sep 16, 2026No 13F filer matched
13D/AAspasia Felice Vahaviolos6,084,508
19.1% of class · Sep 17, 2026−21,142
with Stephanie Athena Foglia, 2025 Irrevocable Two-Year Grantor Retained Annuity Trust of Aspasia F. Vahaviolos
No 13F filer matched
13D/AAspasia Felice Vahaviolos6,078,259
19.1% of class · Sep 17, 2026New 5%+ stake
with 2025 Irrevocable Two-Year Grantor Retained Annuity Trust of Aspasia F. Vahaviolos
No 13F filer matched
13D/AMill Road Capital III GP LLC1,938,316
6.1% of class · Sep 16, 2026+67,736
No 13F filer matched

Institutional Holders — Q3 2026

Dimensional Fund Advisors LP1,706,280
0.0% of portfolio›$35.9M
Weber Capital Management LLC1,360,146
26.1% of portfolio›$28.6M
Wasatch Advisors LP392,289
0.1% of portfolio›$8.3M
Essex Investment Management Co LLC249,209
0.8% of portfolio›$5.2M
Knights of Columbus Asset Advisors LLC140,613
0.1% of portfolio›$3.0M
Bank of New York Mellon Corp78,713
0.0% of portfolio›$1.7M
Raiffeisen Bank International AG65,100
0.0% of portfolio›$1.4M
SummerHaven Investment Management, LLC56,209
0.7% of portfolio›$1.2M
Ellsworth Advisors, LLC43,520
0.1% of portfolio›$916.5K
Strs Ohio43,500
0.0% of portfolio›$916.1K
Wealth Enhancement Advisory Services, LLC43,190
0.0% of portfolio›$894.0K
Versor Investments LP36,420
1.3% of portfolio›$767.0K
Values First Advisors, Inc.34,000
0.3% of portfolio›$716.0K
Simplex Trading, LLC33,492
0.0% of portfolio›$705.3K
MacKenzie Financial Corp29,458
0.0% of portfolio›$620.4K
Cambridge Investment Research Advisors, Inc.29,282
0.0% of portfolio›$617
Imc-Chicago, LLC25,224
0.0% of portfolio›$531.2K
Old National Bancorp20,000
0.0% of portfolio›$421.2K
Seizert Capital Partners, LLC17,733
0.0% of portfolio›$373.5K
State of Wyoming12,381
0.0% of portfolio›$260.7K
State of Alaska, Department of Revenue3,258
0.0% of portfolio›$68
TD Waterhouse Canada Inc.2,870
0.0% of portfolio›$59.2K
Citigroup Inc866
0.0% of portfolio›$18.2K
Harbor Capital Advisors, Inc.781
0.0% of portfolio›$16
Nisa Investment Advisors, LLC437
0.0% of portfolio›$9.2K
Sterling Capital Management LLC410
0.0% of portfolio›$8.6K
SJS Investment Consulting Inc.200
0.0% of portfolio›$4.2K
Parallel Advisors, LLC200
0.0% of portfolio›$4.2K
Fortitude Family Office, LLC137
0.0% of portfolio›$2.9K
Torren Management, LLC126
0.0% of portfolio›$2.7K
Gamma Investing LLC121
0.0% of portfolio›$2.5K
MassMutual Private Wealth & Trust, FSB120
0.0% of portfolio›$2.5K
SBI Securities Co., Ltd.87
0.0% of portfolio›$1.8K
Essential Partners LLC54
0.0% of portfolio›$1.1K
EverSource Wealth Advisors, LLC43
0.0% of portfolio›$905
Root Financial Partners, LLC24
0.0% of portfolio›$505
IFP Advisors, Inc22
0.0% of portfolio›$463
Archer Investment Corp10
0.0% of portfolio›$211
Farther Finance Advisors, LLC5
0.0% of portfolio›$105
True Wealth Design, LLC2
0.0% of portfolio›$43
Covestor Ltd0
0.0% of portfolio›$0
StyleTurnoverLocationFiled
Dimensional Fund Advisors LP
1,706,280$35.9M0.0%IndexLowAustin, TX2026-11-04
Weber Capital Management LLC
1,360,146$28.6M26.1%Deep ValueVery LowNewton, MA2026-10-19
Wasatch Advisors LP
392,289$8.3M0.1%GARPMediumSalt Lake City, UT2026-10-13
Essex Investment Management Co LLC
249,209$5.2M0.8%GrowthMediumBoston, MA2026-10-19
Knights of Columbus Asset Advisors LLC
140,613$3.0M0.1%CoreMediumNew Haven, CT2026-11-05
Bank of New York Mellon Corp
78,713$1.7M0.0%CoreLowNew York, NY2026-11-05
Raiffeisen Bank International AG
65,100$1.4M0.0%GrowthMediumVienna, Chile2026-10-28
SummerHaven Investment Management, LLC
56,209$1.2M0.7%Deep ValueHighStamford, CT2026-10-19
Ellsworth Advisors, LLC
43,520$916.5K0.1%GARPHighHudson, OH2026-10-15
Strs Ohio
43,500$916.1K0.0%CoreMediumColumbus, OH2026-10-30
Wealth Enhancement Advisory Services, LLC
43,190$894.0K0.0%CoreLowPlymouth, MN2026-10-13
Versor Investments LP
36,420$767.0K1.3%ValueVery HighNew York, NY2026-10-23
Values First Advisors, Inc.
34,000$716.0K0.3%CoreMediumJohnson City, TN2026-10-23
Simplex Trading, LLC
33,492$705.3K0.0%CoreVery HighChicago, IL2026-11-04
MacKenzie Financial Corp
29,458$620.4K0.0%CoreMediumToronto Ontario, Australia2026-11-02
Cambridge Investment Research Advisors, Inc.
29,282$6170.0%ETFLowFairfield, IA2026-11-02
Imc-Chicago, LLC
25,224$531.2K0.0%GARPVery HighChicago, IL2026-11-05
Old National Bancorp
20,000$421.2K0.0%CoreLowEvansville, IN2026-10-20
Seizert Capital Partners, LLC
17,733$373.5K0.0%ValueMediumBirmingham, MI2026-10-30
State of Wyoming
12,381$260.7K0.0%ValueHighCheyenne, WY2026-10-28
State of Alaska, Department of Revenue
3,258$680.0%CoreVery LowJuneau, AK2026-10-15
TD Waterhouse Canada Inc.
2,870$59.2K0.0%CoreLowToronto, Australia2026-10-16
Citigroup Inc
866$18.2K0.0%CoreMediumNew York, NY2026-11-04
Harbor Capital Advisors, Inc.
781$160.0%ValueHighChicago, IL2026-10-22
Nisa Investment Advisors, LLC
437$9.2K0.0%IndexVery LowSt. Louis, MO2026-10-20
Sterling Capital Management LLC
410$8.6K0.0%GARPMediumCharlotte, NC2026-10-22
SJS Investment Consulting Inc.
200$4.2K0.0%ETFVery LowSylvania, OH2026-10-26
Parallel Advisors, LLC
200$4.2K0.0%IndexLowSan Francisco, CA2026-11-03
Fortitude Family Office, LLC
137$2.9K0.0%ETFMediumScottsdale, AZ2026-10-14
Torren Management, LLC
126$2.7K0.0%ETFMediumSan Diego, CA2026-10-29
Gamma Investing LLC
121$2.5K0.0%IndexVery LowFoster City, CA2026-10-08
MassMutual Private Wealth & Trust, FSB
120$2.5K0.0%CoreLowSpringfield, MA2026-10-05
SBI Securities Co., Ltd.
87$1.8K0.0%Agg GrowthLowTokyo, Mexico2026-10-22
Essential Partners LLC
54$1.1K0.0%ValueMediumRancho Santa Fe, CA2026-10-14
EverSource Wealth Advisors, LLC
43$9050.0%CoreMediumBirmingham, AL2026-11-04
Root Financial Partners, LLC
24$5050.0%ETFMediumEncinitas, CA2026-10-21
IFP Advisors, Inc
22$4630.0%GrowthLowTampa, FL2026-10-16
Archer Investment Corp
10$2110.0%CoreMediumCarmel, IN2026-11-05
Farther Finance Advisors, LLC
5$1050.0%IndexLowSan Francisco, CA2026-10-08
True Wealth Design, LLC
2$430.0%ETFMediumAkron, OH2026-10-13
Covestor Ltd
0$00.0%ValueHighLondon, United Kingdom2026-10-30