Institutional HoldersBeta

Who holds a company, from every 13F filed for the quarter, one row per filer exactly as filed, against the latest share count the company reported.

Mistras Group, Inc.

CIK 0001436126MG· quarter ending 2026-06-30

Shares outstanding

31,849,893

as of 2026-08-05 · 10-Q cover page, filed 2026-08-10

Held by 13F filers

19,876,193

62.4% of shares outstanding

Holders

137

+8 vs 2026-03-31 · 25 new, 17 exited

Value

$347.1M

shares +8.8% vs prior quarter

Share classes (cover page of the 10-Q filed 2026-08-10, as of 2026-08-05)

Class	Listed	Shares outstanding	Held by 13F filers	% of class	Holders	CUSIP
Common stock	MG · NYSE	31,849,893	19,876,193	62.4%	137	60649T107

Each class is compared with its own share count; classes are not added together. A class that is not exchange-listed cannot be held by 13F filers.

Securities (CUSIPs held in 13F this quarter)

tick to combine

Count	CUSIP	Class (as filers write it)	Holders	Shares held	Class shares	% of class	Value	Options	Mapped via
	60649T107	COM	137	19,876,193	31,849,893	62.4%	$347.1M	2 call / 3 put	13DG	holders →

Totals combine the ticked CUSIPs and update as you tick: common-stock classes by default; preferreds, notes, warrants and depositary shares are listed but not counted. "holders →" shows a single CUSIP on its own. Bonds are held as a principal amount, not shares. Options positions are never counted as holdings.

Top holders (137 of 137 · 60649T107)

change vs 2026-03-31

#	Filer	Shares	% of class	Value	Change
1	Mill Road Capital Management LLC	1,929,509	6.06%	$33.7M	+58,929 (+3.2%)
2	DIMENSIONAL FUND ADVISORS LP	1,700,793	5.34%	$29.7M	-2,888 (-0.2%)
3	ROYCE & ASSOCIATES LP	1,580,728	4.96%	$27.6M	+47,676 (+3.1%)
4	WEBER CAPITAL MANAGEMENT LLC /ADV	1,448,154	4.55%	$25.3M	-8,815 (-0.6%)
5	BlackRock, Inc.	1,166,197	3.66%	$20.4M	+306,745 (+35.7%)
6	IES Holdings, Inc.	1,124,235	3.53%	$19.6M	+3,690 (+0.3%)
7	First Eagle Investment Management, LLC	1,107,710	3.48%	$19.4M	+826,178 (+293.5%)
8	VANGUARD CAPITAL MANAGEMENT LLC	1,052,512	3.30%	$18.4M	+122,334 (+13.2%)
9	FEDERATED HERMES, INC.	656,032	2.06%	$11.5M	—
10	GEODE CAPITAL MANAGEMENT, LLC	510,059	1.60%	$8.9M	+156,648 (+44.3%)
11	DEUTSCHE BANK AG\	389,488	1.22%	$6.8M	+10,034 (+2.6%)
12	STATE STREET CORP	385,924	1.21%	$6.7M	+73,760 (+23.6%)
13	BRIDGEWAY CAPITAL MANAGEMENT, LLC	354,371	1.11%	$6.2M	—
14	Pacific Ridge Capital Partners, LLC	282,880	0.89%	$4.9M	-2,394 (-0.8%)
15	ACADIAN ASSET MANAGEMENT LLC	276,512	0.87%	$4.8M	+118,177 (+74.6%)
16	Qube Research & Technologies Ltd	275,749	0.87%	$4.8M	+57,703 (+26.5%)
17	CSM Advisors, LLC	267,586	0.84%	$4.7M	-295 (-0.1%)
18	Clearline Capital LP	267,460	0.84%	$4.7M	-286,629 (-51.7%)
19	ESSEX INVESTMENT MANAGEMENT CO LLC	257,127	0.81%	$4.5M	-11,440 (-4.3%)
20	ALGERT GLOBAL LLC	232,669	0.73%	$4.1M	+53,379 (+29.8%)
21	Empowered Funds, LLC	225,494	0.71%	$3.9M	—
22	JB CAPITAL PARTNERS LP	202,243	0.63%	$3.5M	—
23	NORTHERN TRUST CORP	201,968	0.63%	$3.5M	+42,217 (+26.4%)
24	O'SHAUGHNESSY ASSET MANAGEMENT, LLC	161,333	0.51%	$2.8M	+26,165 (+19.4%)
25	CITADEL ADVISORS LLC	151,487	0.48%	$2.6M	+25,253 (+20.0%)
26	GOLDMAN SACHS GROUP INC	149,648	0.47%	$2.6M	+18,272 (+13.9%)
27	TWO SIGMA INVESTMENTS, LP	149,357	0.47%	$2.6M	-81,968 (-35.4%)
28	VANGUARD PORTFOLIO MANAGEMENT LLC	143,262	0.45%	$2.5M	+79,449 (+124.5%)
29	Knights of Columbus Asset Advisors LLC	139,955	0.44%	$2.4M	-126 (-0.1%)
30	VANGUARD FIDUCIARY TRUST CO	130,002	0.41%	$2.3M	+17,725 (+15.8%)
31	RITHOLTZ WEALTH MANAGEMENT	113,834	0.36%	$2.0M	+9,082 (+8.7%)
32	MORGAN STANLEY	111,207	0.35%	$1.9M	+6,936 (+6.7%)
33	AMERIPRISE FINANCIAL INC	109,080	0.34%	$1.9M	+1,705 (+1.6%)
34	JACOBS LEVY EQUITY MANAGEMENT, INC	105,898	0.33%	$1.9M	-8,579 (-7.5%)
35	RENAISSANCE TECHNOLOGIES LLC	102,700	0.32%	$1.8M	-17,800 (-14.8%)
36	SEI INVESTMENTS CO	101,998	0.32%	$1.8M	-102,842 (-50.2%)
37	Informed Momentum Co LLC	92,457	0.29%	$1.6M	-3,806 (-4.0%)
38	Legato Capital Management LLC	86,529	0.27%	$1.5M	+2,584 (+3.1%)
39	Equitable Holdings, Inc.	86,445	0.27%	$1.5M	NEW
40	UBS Group AG	84,463	0.27%	$1.5M	+67,702 (+403.9%)
41	Nuveen, LLC	83,409	0.26%	$1.5M	+19,525 (+30.6%)
42	GSA CAPITAL PARTNERS LLP	79,701	0.25%	$1.4M	+30,936 (+63.4%)
43	Bank of New York Mellon Corp	79,219	0.25%	$1.4M	+16,090 (+25.5%)
44	Uniplan Investment Counsel, Inc.	77,889	0.24%	$1.4M	NEW
45	Manatuck Hill Partners, LLC	71,900	0.23%	$1.3M	+21,900 (+43.8%)
46	SUSQUEHANNA INTERNATIONAL GROUP, LLP	66,187	0.21%	$1.2M	NEW
47	Raiffeisen Bank International AG	65,000	0.20%	$1.2M	—
48	Juniper Investment Company, LLC	61,138	0.19%	$1.1M	NEW
49	FIRST TRUST ADVISORS LP	60,219	0.19%	$1.1M	+3,009 (+5.3%)
50	Cambridge Investment Research Advisors, Inc.	57,184	0.18%	$999K	+30,963 (+118.1%)
51	RBF Capital, LLC	55,000	0.17%	$961K	—
52	AMERICAN CENTURY COMPANIES INC	54,802	0.17%	$957K	+6,004 (+12.3%)
53	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	50,134	0.16%	$876K	+18,994 (+61.0%)
54	Numerai GP LLC	49,965	0.16%	$873K	NEW
55	WEALTH ENHANCEMENT ADVISORY SERVICES, LLC	45,011	0.14%	$732K	+4,777 (+11.9%)
56	D. E. Shaw & Co., Inc.	44,226	0.14%	$773K	-41,805 (-48.6%)
57	Ellsworth Advisors, LLC	42,316	0.13%	$679K	NEW
58	LPL Financial LLC	40,734	0.13%	$712K	NEW
59	Concentric Capital Strategies, LP	39,545	0.12%	$691K	NEW
60	AQR CAPITAL MANAGEMENT LLC	37,245	0.12%	$651K	+16,236 (+77.3%)
61	Assenagon Asset Management S.A.	35,942	0.11%	$628K	+17,971 (+100.0%)
62	STRS OHIO	35,400	0.11%	$618K	+3,700 (+11.7%)
63	Values First Advisors, Inc.	34,598	0.11%	$604K	-729 (-2.1%)
64	Verdad Advisers, LP	34,526	0.11%	$603K	—
65	LSV ASSET MANAGEMENT	34,501	0.11%	$603K	-1,300 (-3.6%)
66	PANAGORA ASSET MANAGEMENT INC	34,410	0.11%	$601K	-516 (-1.5%)
67	Trexquant Investment LP	33,379	0.10%	$583K	-10,549 (-24.0%)
68	XTX Topco Ltd	31,972	0.10%	$559K	NEW
69	Russell Investments Group, Ltd.	27,131	0.09%	$474K	+17,842 (+192.1%)
70	Invesco Ltd.	27,084	0.09%	$473K	-3,220 (-10.6%)
71	Hillsdale Investment Management Inc.	26,600	0.08%	$465K	—
72	VOYA INVESTMENT MANAGEMENT LLC	24,884	0.08%	$435K	+3,905 (+18.6%)
73	EntryPoint Capital, LLC	22,015	0.07%	$385K	+1,589 (+7.8%)
74	FRANKLIN RESOURCES INC	20,968	0.07%	$366K	-4,434 (-17.5%)
75	OLD NATIONAL BANCORP /IN/	20,000	0.06%	$349K	—
76	Dynamic Technology Lab Private Ltd	19,651	0.06%	$343K	NEW
77	RAYMOND JAMES FINANCIAL INC	19,227	0.06%	$336K	-3,870 (-16.8%)
78	SEIZERT CAPITAL PARTNERS, LLC	18,938	0.06%	$331K	NEW
79	RHUMBLINE ADVISERS	18,797	0.06%	$328K	+7,898 (+72.5%)
80	BNP PARIBAS FINANCIAL MARKETS	18,176	0.06%	$318K	+11,370 (+167.1%)
81	WELLS FARGO & COMPANY/MN	17,120	0.05%	$299K	+10,970 (+178.4%)
82	SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC	16,957	0.05%	$296K	NEW
83	MACKENZIE FINANCIAL CORP	16,460	0.05%	$288K	NEW
84	Banco Santander, S.A.	16,392	0.05%	$286K	NEW
85	ALLIANCEBERNSTEIN L.P.	15,480	0.05%	$229K	+3,600 (+30.3%)
86	PRICE T ROWE ASSOCIATES INC /MD/	14,533	0.05%	$254K	+4,209 (+40.8%)
87	BANK OF AMERICA CORP /DE/	14,268	0.04%	$249K	-1,638 (-10.3%)
88	SIMPLEX TRADING, LLC	13,151	0.04%	$230K	+4,353 (+49.5%)
89	PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO	13,018	0.04%	$227K	—
90	PRUDENTIAL FINANCIAL INC	11,635	0.04%	$203K	-3,100 (-21.0%)
91	MetLife Investment Management, LLC	10,559	0.03%	$184K	+6,773 (+178.9%)
92	Quadrature Capital Ltd	10,427	0.03%	$182K	NEW
93	CITIGROUP INC	8,210	0.03%	$143K	+3,372 (+69.7%)
94	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	8,152	0.03%	$142K	+2,991 (+58.0%)
95	JPMORGAN CHASE & CO	7,873	0.02%	$144K	+2,734 (+53.2%)
96	GROUP ONE TRADING LLC	7,518	0.02%	$131K	NEW
97	JONES FINANCIAL COMPANIES LLLP	6,490	0.02%	$122K	+2,814 (+76.6%)
98	Vanguard Global Advisers, LLC	6,056	0.02%	$106K	-2,034 (-25.1%)
99	Police & Firemen's Retirement System of New Jersey	5,967	0.02%	$104K	+2,376 (+66.2%)
100	FMR LLC	5,299	0.02%	$93K	-206 (-3.7%)
101	NEW YORK STATE COMMON RETIREMENT FUND	5,076	0.02%	$89K	—
102	State of Wyoming	4,087	0.01%	$71K	NEW
103	Rockefeller Capital Management L.P.	3,520	0.01%	$61K	-310 (-8.1%)
104	OSAIC HOLDINGS, INC.	3,280	0.01%	$57K	+3,050 (+1326.1%)
105	BARCLAYS PLC	3,264	0.01%	$57K	-2,741 (-45.6%)
106	LOM Asset Management Ltd	3,000	0.01%	$52K	—
107	TD Waterhouse Canada Inc.	2,870	0.01%	$49K	—
108	Mirae Asset Global Investments Co., Ltd.	2,361	0.01%	$41K	NEW
109	State of Alaska, Department of Revenue	1,765	0.01%	$30K	—
110	Legal & General Group Plc	1,727	0.01%	$30K	+614 (+55.2%)
111	Ameritas Investment Partners, Inc.	1,607	0.01%	$28K	+597 (+59.1%)
112	Tower Research Capital LLC (TRC)	964	0.00%	$17K	-124 (-11.4%)
113	ROYAL BANK OF CANADA	527	0.00%	$9K	NEW
114	NISA INVESTMENT ADVISORS, LLC	437	0.00%	$8K	—
115	HARBOR CAPITAL ADVISORS, INC.	377	0.00%	$7K	—
116	Sterling Capital Management LLC	280	0.00%	$5K	-84 (-23.1%)
117	Colonial Trust Advisors	192	0.00%	$3K	NEW
118	Arax Advisory Partners	155	0.00%	$3K	NEW
119	CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM	154	0.00%	$3K	-448 (-74.4%)
120	Torren Management, LLC	126	0.00%	$2K	—
121	GAMMA Investing LLC	121	0.00%	$2K	—
122	RAFFA WEALTH MANAGEMENT, LLC	120	0.00%	$2K	NEW
123	Allworth Financial LP	78	0.00%	$1K	+51 (+188.9%)
124	SBI Securities Co., Ltd.	75	0.00%	$1K	+12 (+19.0%)
125	C M BIDWELL & ASSOCIATES LTD	66	0.00%	$1K	—
126	Essential Partners LLC	62	0.00%	$1K	+26 (+72.2%)
127	Institute for Wealth Management, LLC.	53	0.00%	$927	NEW
128	EverSource Wealth Advisors, LLC	44	0.00%	$768	-23 (-34.3%)
129	ASSETMARK, INC	36	0.00%	$629	NEW
130	MassMutual Private Wealth & Trust, FSB	31	0.00%	$542	+2 (+6.9%)
131	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	27	0.00%	$472	—
132	IFP Advisors, Inc	22	0.00%	$384	—
133	Archer Investment Corp	20	0.00%	$350	+10 (+100.0%)
134	Parallel Advisors, LLC	20	0.00%	$349	NEW
135	Farther Finance Advisors, LLC	3	0.00%	$52	—
136	True Wealth Design, LLC	2	0.00%	$35	—
137	ROTHSCHILD INVESTMENT LLC	1	0.00%	$17	—

Exited since 2026-03-31 (17 filers; largest 17 shown)

Invenomic Capital Management LP	−452,614
Inspire Investing, LLC	−115,815
LAZARD ASSET MANAGEMENT LLC	−70,369
JANE STREET GROUP, LLC	−49,764
MILLENNIUM MANAGEMENT LLC	−36,968
HRT FINANCIAL LP	−26,770
Squarepoint Ops LLC	−18,780
Engineers Gate Manager LP	−17,568
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	−12,104
Kemnay Advisory Services Inc.	−5,550
CWM, LLC	−1,478
Investors Research Corp	−800
Larson Financial Group LLC	−101
Root Financial Partners, LLC	−14
Advisory Services Network, LLC	−12
MAI Capital Management	−6
Optiver Holding B.V.	−4

Large holders from 13D/13G (latest per reporting person, last 2 years)

Filed when a holder crosses 5% or changes materially, so often more current than the quarter-end 13F. Percentages are the filer's own, against the share count they used.

Reporting person	Form	Filed	Event	Shares	% of class
2025 Irrevocable Two-Year Grantor Retained Annuity Trust of Aspasia F. Vahaviolos	SCHEDULE 13D/A	2026-09-21	2026-09-17	3,923,718	12.3%
Aspasia Felice Vahaviolos	SCHEDULE 13D/A	2026-09-21	2026-09-17	6,078,259	19.1%
Stephanie Athena Foglia	SCHEDULE 13D/A	2026-09-21	2026-09-17	5,532,313	17.4%
Mill Road Capital III GP LLC	SCHEDULE 13D/A	2026-09-18	2026-09-16	1,938,316	6.1%
Mill Road Capital III, L.P.	SCHEDULE 13D/A	2026-09-18	2026-09-16	1,938,316	6.1%
Thomas E. Lynch	SCHEDULE 13D/A	2026-09-18	2026-09-16	1,938,316	6.1%
Stephanie Foglia	SCHEDULE 13D/A	2026-06-12	2026-06-10	5,917,135	18.6%
Aspasia Vahaviolos	SCHEDULE 13G	2026-03-31	2025-12-31	6,105,650	19.32%
Kristy Kyriakopoulos	SCHEDULE 13G/A	2026-03-31	2025-07-08	1,617,006	5.12%
Dimensional Fund Advisors LP	SCHEDULE 13G	2025-07-15	2025-06-30	1,623,141	5.2%

Source: SEC Form 13F-HR information tables for the quarter ending 2026-06-30 (filed within 45 days of quarter end; amendments applied; values normalised to dollars), the share count from the company's latest 10-K/10-Q XBRL cover page, and Schedule 13D/13G filings. Each row is a legal 13F filer as filed — related entities (e.g. Vanguard's advisers) are not merged. Retail brokerage accounts are not reported on 13F, so the remainder is mostly retail and insiders.