MG · Mistras Group, Inc. · Shareholders & Ownership

$21.42 +0.11 (+0.52%) At close · Oct 22

Russell 2000 member Rebalance outlook locked

Market Cap

$682.22M

31.85M

Volume · Oct 22 200.76K Avg daily vol (3M) 324.4K

Every disclosed holder of MG in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

How the holder list picks a filing →

Who Owns MG

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

No chart: the summed disclosures exceed shares outstanding, so they are not parts of one whole.

Holder group	Holders	Shares	% Out	Summed
Institutional (13F)	139	19,611,983	61.58%	Yes
Insiders (Forms 3, 4, 5)	15	10,494,088	32.95%	Yes
13D/G-only blocks	3	5,396,881	16.94%	Yes
Remaining	—	3,653,059	-11.47%	Negative
Registered funds (N-PORT, not summed)	154	7,951,601	24.97%	No

Shares outstanding: 31,849,893, the issuer's latest cover-page count restated onto today's split basis.

Remaining is negative: the summed disclosures exceed shares outstanding, as when filings are dated at different times or holders that do not disclose their links count the same shares. It is flagged, not clipped.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of MG

One row per holder Every filing By ultimate parent

All 13F Funds Insiders 13D/G Non-US

#	Holder	Shares	% Out	Change	As of	Notes
1	Stephanie Foglia 13D CIK 2082289 · Unknown · Sep 17, 2026 Item 4 purpose: Merger opposition or support not summed	5,532,313	17.37%	0	Sep 17, 2026	not summed
1.1	Foglia Stephanie Athena Insider CIK 2082289 · Sep 10, 2026 10% Owner, issuer-wide	1,395,016	4.38%	—	Sep 10, 2026	10% Owner, issuer-wide
2	2025 Irrevocable Two-Year Grantor Retained Annuity Trust of Aspasia F. Vahaviolos Insider CIK 2102046 · Dec 31, 2025 10% Owner, issuer-wide	5,251,358	16.49%	—	Dec 31, 2025	10% Owner, issuer-wide
3	Vahaviolos Aspasia Felice Insider CIK 2082296 · Sep 10, 2026 10% Owner, issuer-wide	2,160,790	6.78%	+365,951	Sep 10, 2026	10% Owner, issuer-wide
3.1	Aspasia Vahaviolos 13G CIK 2082296 · Unknown · Jun 30, 2026 Rule 13d-1(c), passive investor, not summed	6,105,650	19.17%	0	Jun 30, 2026	Rule 13d-1(c), passive investor, not summed
4	Mill Road Capital III, L.P. 13D CIK 1767199 · Unknown · Sep 16, 2026 Item 4 purpose: not restated by this amendment, the earlier 13D's purpose stands	1,938,316	6.09%	+67,736	Sep 16, 2026
5	Mill Road Capital Management LLC 13F CIK 1512275 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,929,509	6.06%	+58,929	Jun 30, 2026	carried, not yet filed for the newest quarter
6	DIMENSIONAL FUND ADVISORS LP 13F CIK 354204 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,700,793	5.34%	-2,888	Jun 30, 2026	carried, not yet filed for the newest quarter
6.1	U.S. SMALL CAP VALUE PORTFOLIO Fund S000000987 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	384,585	1.21%	-9,487	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
6.2	U.S. Targeted Value Portfolio Fund S000000970 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	238,101	0.75%	+7,273	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
6.3	Dimensional U.S. Targeted Value ETF Fund S000070901 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	204,045	0.64%	+9,372	Jul 31, 2026	Dimensional ETF Trust, not summed
6.4	U.S. SMALL CAP PORTFOLIO Fund S000000971 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	136,415	0.43%	0	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
6.5	Dimensional US Small Cap Value ETF Fund S000075151 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	123,935	0.39%	+1,300	Jul 31, 2026	Dimensional ETF Trust, not summed
7	Kristy Kyriakopoulos 13G CIK 2082695 · Unknown · Jul 8, 2025 Rule 13d-1(c), passive investor	1,617,006	5.08%	—	Jul 8, 2025	Rule 13d-1(c), passive investor
8	ROYCE & ASSOCIATES LP 13F CIK 906304 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,580,728	4.96%	+47,676	Jun 30, 2026	carried, not yet filed for the newest quarter
8.1	Royce Small-Cap Opportunity Fund Fund S000009512 · Registered fund · Jun 30, 2026 ROYCE FUND, not summed	556,302	1.75%	-79,418	Jun 30, 2026	ROYCE FUND, not summed
8.2	Royce Micro-Cap Fund Fund S000009506 · Registered fund · Jun 30, 2026 ROYCE FUND, not summed	108,953	0.34%	+26,149	Jun 30, 2026	ROYCE FUND, not summed
8.3	Royce Capital Fund - Micro-Cap Portfolio Fund S000009496 · Registered fund · Jun 30, 2026 ROYCE CAPITAL FUND, not summed	35,925	0.11%	+9,412	Jun 30, 2026	ROYCE CAPITAL FUND, not summed
9	WEBER CAPITAL MANAGEMENT LLC /ADV 13F CIK 1099905 · Registered investment adviser · Sep 30, 2026	1,360,146	4.27%	-88,008	Sep 30, 2026
10	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	1,166,197	3.66%	+306,745	Jun 30, 2026	carried, not yet filed for the newest quarter
10.1	iShares Russell 2000 ETF Fund S000004344 · Registered fund · Jun 30, 2026 iShares Trust, not summed	439,633	1.38%	+162,084	Jun 30, 2026	iShares Trust, not summed
10.2	iShares Russell 2000 Value ETF Fund S000004342 · Registered fund · Jun 30, 2026 iShares Trust, not summed	122,783	0.39%	+27,979	Jun 30, 2026	iShares Trust, not summed
10.3	iShares Micro-Cap ETF Fund S000004439 · Registered fund · Jun 30, 2026 iShares Trust, not summed	59,392	0.19%	+31,767	Jun 30, 2026	iShares Trust, not summed
10.4	iShares Russell 2000 Growth ETF Fund S000004343 · Registered fund · Jun 30, 2026 iShares Trust, not summed	43,090	0.14%	—	Jun 30, 2026	iShares Trust, not summed
10.5	Master Small Cap Index Series Fund S000002716 · Registered fund · Jun 30, 2026 Quantitative Master Series LLC, not summed	33,094	0.10%	+12,563	Jun 30, 2026	Quantitative Master Series LLC, not summed
11	IES Holdings, Inc. 13F CIK 1048268 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	1,124,235	3.53%	+3,690	Jun 30, 2026	carried, not yet filed for the newest quarter
12	VANGUARD CAPITAL MANAGEMENT LLC 13F CIK 2100119 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,052,512	3.30%	+122,334	Jun 30, 2026	carried, not yet filed for the newest quarter
13	VANGUARD TOTAL STOCK MARKET INDEX FUND Fund S000002848 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	813,148	2.55%	+105,634	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
14	FEDERATED HERMES, INC. 13F CIK 1056288 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	656,032	2.06%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
15	First Eagle Investment Management, LLC 13F CIK 1325447 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	553,855	1.74%	+272,323	Jun 30, 2026	carried, not yet filed for the newest quarter
15.1	First Eagle Small Cap Opportunity Fund Fund S000072438 · Registered fund · Jul 31, 2026 First Eagle Funds, not summed	536,690	1.69%	+251,629	Jul 31, 2026	First Eagle Funds, not summed
16	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	510,059	1.60%	+156,648	Jun 30, 2026	carried, not yet filed for the newest quarter
17	Stamatakis Manuel N. Insider CIK 1473735 · Mar 4, 2026 Director, Executive Chairman, issuer-wide	509,795	1.60%	-814	Mar 4, 2026	Director, Executive Chairman, issuer-wide
18	Federated Hermes MDT Small Cap Core Fund Fund S000012972 · Registered fund · Jul 31, 2026 Federated Hermes MDT Series, not summed	499,192	1.57%	0	Jul 31, 2026	Federated Hermes MDT Series, not summed
19	WASATCH ADVISORS LP 13F CIK 814133 · Registered investment adviser · Sep 30, 2026	392,289	1.23%	+392,289	Sep 30, 2026
20	DEUTSCHE BANK AG\ 13F CIK 948046 · Non-US institution · Jun 30, 2026 carried, not yet filed for the newest quarter	389,488	1.22%	+10,034	Jun 30, 2026	carried, not yet filed for the newest quarter
20.1	DWS Small Cap Core Fund Fund S000005709 · Registered fund · Jun 30, 2026 DEUTSCHE DWS INVESTMENT TRUST, not summed	372,214	1.17%	0	Jun 30, 2026	DEUTSCHE DWS INVESTMENT TRUST, not summed
20.2	DWS Small Cap Index VIP Fund S000006223 · Registered fund · Jun 30, 2026 DEUTSCHE DWS INVESTMENTS VIT FUNDS, not summed	2,796	0.01%	+1,288	Jun 30, 2026	DEUTSCHE DWS INVESTMENTS VIT FUNDS, not summed
21	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	385,924	1.21%	+73,760	Jun 30, 2026	carried, not yet filed for the newest quarter
21.1	STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO Fund S000050332 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	3,900	0.01%	-1,300	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
21.2	State Street Total Return V.I.S. Fund Fund S000001637 · Registered fund · Jun 30, 2026 STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed	447	0.00%	+186	Jun 30, 2026	STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
22	BRIDGEWAY CAPITAL MANAGEMENT, LLC 13F CIK 1107261 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	354,371	1.11%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
22.1	Omni Small-Cap Value Fund Fund S000033567 · Registered fund · Jun 30, 2026 Bridgeway Funds, Inc., not summed	114,277	0.36%	0	Jun 30, 2026	Bridgeway Funds, Inc., not summed
22.2	Ultra-Small Company Market Fund Fund S000004424 · Registered fund · Jun 30, 2026 Bridgeway Funds, Inc., not summed	10,700	0.03%	0	Jun 30, 2026	Bridgeway Funds, Inc., not summed
23	Pacific Ridge Capital Partners, LLC 13F CIK 1591546 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	282,880	0.89%	-2,394	Jun 30, 2026	carried, not yet filed for the newest quarter
24	ACADIAN ASSET MANAGEMENT LLC 13F CIK 916542 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	276,512	0.87%	+118,177	Jun 30, 2026	carried, not yet filed for the newest quarter
25	Qube Research & Technologies Ltd 13F CIK 1729829 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	275,749	0.87%	+57,703	Jun 30, 2026	carried, not yet filed for the newest quarter
26	DEBENEDICTIS NICHOLAS Insider CIK 1194707 · May 19, 2026 Director, issuer-wide	273,820	0.86%	+6,862	May 19, 2026	Director, issuer-wide
27	CSM Advisors, LLC 13F CIK 1863523 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	267,586	0.84%	-295	Jun 30, 2026	carried, not yet filed for the newest quarter
28	Clearline Capital LP 13F CIK 1600136 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	267,460	0.84%	-286,629	Jun 30, 2026	carried, not yet filed for the newest quarter
29	ROYCE MICRO-CAP TRUST, INC. Fund · Registered fund · Jun 30, 2026 ROYCE MICRO-CAP TRUST, INC., not summed	254,579	0.80%	—	Jun 30, 2026	ROYCE MICRO-CAP TRUST, INC., not summed
30	ESSEX INVESTMENT MANAGEMENT CO LLC 13F CIK 201772 · Registered investment adviser · Sep 30, 2026	249,209	0.78%	-7,918	Sep 30, 2026
31	ALGERT GLOBAL LLC 13F CIK 1275218 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	232,669	0.73%	+53,379	Jun 30, 2026	carried, not yet filed for the newest quarter
32	Empowered Funds, LLC 13F CIK 1592828 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	225,494	0.71%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
32.1	EA Bridgeway Omni Small-Cap Value ETF Fund S000078089 · Registered fund · Jun 30, 2026 EA Series Trust, not summed	225,494	0.71%	0	Jun 30, 2026	EA Series Trust, not summed
33	VANGUARD EXTENDED MARKET INDEX FUND Fund S000002841 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	214,613	0.67%	+12,678	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
34	JB CAPITAL PARTNERS LP 13F CIK 1138532 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	202,243	0.64%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
35	NORTHERN TRUST CORP 13F CIK 73124 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	201,968	0.63%	+42,217	Jun 30, 2026	carried, not yet filed for the newest quarter
35.1	Small Cap Value Fund Fund S000001246 · Registered fund · Jun 30, 2026 Northern Funds, not summed	52,305	0.16%	0	Jun 30, 2026	Northern Funds, not summed
35.2	Small Cap Index Fund Fund S000001245 · Registered fund · Jun 30, 2026 Northern Funds, not summed	9,136	0.03%	+3,186	Jun 30, 2026	Northern Funds, not summed
36	FORESE JAMES J Insider CIK 1179521 · May 19, 2026 Director, issuer-wide	177,043	0.56%	+6,862	May 19, 2026	Director, issuer-wide
37	O'SHAUGHNESSY ASSET MANAGEMENT, LLC 13F CIK 1423442 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	161,333	0.51%	+26,165	Jun 30, 2026	carried, not yet filed for the newest quarter
38	Federated Hermes MDT Small Cap Growth Fund Fund S000012973 · Registered fund · Jul 31, 2026 Federated Hermes MDT Series, not summed	156,840	0.49%	0	Jul 31, 2026	Federated Hermes MDT Series, not summed
39	CITADEL ADVISORS LLC 13F CIK 1423053 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	151,487	0.48%	+25,253	Jun 30, 2026	carried, not yet filed for the newest quarter
40	GOLDMAN SACHS GROUP INC 13F CIK 886982 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	149,648	0.47%	+18,272	Jun 30, 2026	carried, not yet filed for the newest quarter
40.1	Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF Fund S000048296 · Registered fund · May 31, 2026 Goldman Sachs ETF Trust, not summed	17,622	0.06%	+233	May 31, 2026	Goldman Sachs ETF Trust, not summed
40.2	Goldman Sachs Small Cap Value Insights Fund Fund S000014929 · Registered fund · Jul 31, 2026 Goldman Sachs Trust, not summed	14,784	0.05%	—	Jul 31, 2026	Goldman Sachs Trust, not summed
40.3	Goldman Sachs Absolute Return Tracker Fund Fund S000020314 · Registered fund · Jun 30, 2026 GOLDMAN SACHS TRUST, not summed	12,869	0.04%	-996	Jun 30, 2026	GOLDMAN SACHS TRUST, not summed
41	TWO SIGMA INVESTMENTS, LP 13F CIK 1179392 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	149,357	0.47%	-81,968	Jun 30, 2026	carried, not yet filed for the newest quarter
42	Prajzner Edward J Insider CIK 1361681 · Mar 22, 2026 Sr. EVP and CFO, issuer-wide	148,076	0.46%	-1,367	Mar 22, 2026	Sr. EVP and CFO, issuer-wide
43	VANGUARD PORTFOLIO MANAGEMENT LLC 13F CIK 2100121 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	143,262	0.45%	+79,449	Jun 30, 2026	carried, not yet filed for the newest quarter
44	Knights of Columbus Asset Advisors LLC 13F CIK 1688666 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	139,955	0.44%	-126	Jun 30, 2026	carried, not yet filed for the newest quarter
44.1	Knights of Columbus Small Cap Equity Fund Fund S000048266 · Registered fund · Jul 31, 2026 ADVISORS' INNER CIRCLE III, not summed	129,884	0.41%	+4,131	Jul 31, 2026	ADVISORS' INNER CIRCLE III, not summed
44.2	Knights of Columbus U.S. ALL CAP INDEX FUND Fund S000066639 · Registered fund · Jul 31, 2026 ADVISORS' INNER CIRCLE III, not summed	147	0.00%	+37	Jul 31, 2026	ADVISORS' INNER CIRCLE III, not summed
45	VANGUARD FIDUCIARY TRUST CO 13F CIK 933478 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	130,002	0.41%	+17,725	Jun 30, 2026	carried, not yet filed for the newest quarter
46	Inspire Fidelis Multi Factor ETF Fund S000076870 · Registered fund · May 31, 2026 Northern Lights Fund Trust IV, not summed	128,775	0.40%	+5,484	May 31, 2026	Northern Lights Fund Trust IV, not summed
47	SHUMAN-FABBRI NATALIA Insider CIK 1585776 · Sep 8, 2026 Director, President and CEO, issuer-wide	123,780	0.39%	-2,410	Sep 8, 2026	Director, President and CEO, issuer-wide
48	RITHOLTZ WEALTH MANAGEMENT 13F CIK 1698218 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	113,834	0.36%	+9,082	Jun 30, 2026	carried, not yet filed for the newest quarter
49	MORGAN STANLEY 13F CIK 895421 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	111,207	0.35%	+6,936	Jun 30, 2026	carried, not yet filed for the newest quarter
50	AMERIPRISE FINANCIAL INC 13F CIK 820027 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	109,080	0.34%	+1,705	Jun 30, 2026	carried, not yet filed for the newest quarter

17 more nested rows are not shown here; Every filing lists them all.

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Showing 1–50 of 233 holders

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Key facts CIK 1436126 CUSIP 60649T107 13F (30d) 21 filings 21 filers Visit website Investor relations