Vault-13

MISTRAS GROUP INC MG

COM · Common Stock · CUSIP 60649T107

91 institutional holders +7 vs Q1 2024
14,172,05214.2m shares reported held*
45.7% of all shares outstanding*
$117.5mreported value*
14 new 31 added 28 reduced 9 sold out net sold ≈ $2.5m (-296.4k shares)

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($1.5m this quarter). Holder counts are more reliable. Shares outstanding: 31.0m as of 2024-07-30, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $8.29. Options: 4 managers hold calls ($224.4k notional), 3 hold puts ($22.2k).

Trends to Q2 2024

Institutional holders

Managers reporting a position, each quarter

050100Q3 22: 67Q4 22: 62Q1 23: 63Q2 23: 80Q3 23: 78Q4 23: 80Q1 24: 84Q2 24: 9191Q3 22Q1 23Q3 23Q1 24Q2 24
Numbers
QuarterHolders
Q3 202267
Q4 202262
Q1 202363
Q2 202380
Q3 202378
Q4 202380
Q1 202484
Q2 202491

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
50050Q4 22: 15 bought or addedQ4 22: 39 cut or sold outQ4 22Q1 23: 38 bought or addedQ1 23: 17 cut or sold outQ2 23: 47 bought or addedQ2 23: 26 cut or sold outQ2 23Q3 23: 34 bought or addedQ3 23: 37 cut or sold outQ4 23: 35 bought or addedQ4 23: 34 cut or sold outQ4 23Q1 24: 40 bought or addedQ1 24: 33 cut or sold outQ2 24: 45 bought or addedQ2 24: 37 cut or sold outQ2 24
Numbers
QuarterBought or addedCut or sold out
Q4 20221539
Q1 20233817
Q2 20234726
Q3 20233437
Q4 20233534
Q1 20244033
Q2 20244537

Calls vs puts

Options held, notional value, last 4 quarters. P/C = puts ÷ calls

CallsPuts
$0$200k$400k$600k$800kQ3 23 calls: $685.2kQ3 23 puts: $626.8kQ3 23P/C 0.91Q4 23 calls: $217.2kQ4 23 puts: $17.6kQ4 23P/C 0.08Q1 24 calls: $218.8kQ1 24 puts: $3.0kQ1 24P/C 0.01Q2 24 calls: $224.4kQ2 24 puts: $22.2kQ2 24P/C 0.10
Numbers
QuarterCallsPutsP/C
Q3 2023$685.2k$626.8k0.91
Q4 2023$217.2k$17.6k0.08
Q1 2024$218.8k$3.0k0.01
Q2 2024$224.4k$22.2k0.10

Biggest buyers

MERCER GLOBAL ADVISORS INC /ADV New +72,363+72.4k
JACOBS LEVY EQUITY MANAGEMENT, INC Added +65,922+65.9k
DIMENSIONAL FUND ADVISORS LP Added +44,550+44.5k
ROYCE & ASSOCIATES LP Added +44,499+44.5k
STRS OHIO Added +40,900+40.9k
WELLS FARGO & COMPANY/MN Added +36,121+36.1k
GSA CAPITAL PARTNERS LLP Added +33,740+33.7k
MILLENNIUM MANAGEMENT LLC New +32,823+32.8k
Connor, Clark & Lunn Investment Management Ltd. Added +29,964+30.0k
Hillsdale Investment Management Inc. New +23,300+23.3k

Biggest sellers

MORGAN STANLEY Reduced -235,573-235.6k
Empowered Funds, LLC Reduced -157,452-157.5k
Invenomic Capital Management LP Reduced -120,391-120.4k
Informed Momentum Co LLC Sold out -95,190-95.2k
Janney Montgomery Scott LLC Sold out -45,150-45.1k
Price Jennifer C. Reduced -40,516-40.5k
JPMORGAN CHASE & CO Reduced -39,544-39.5k
WEALTH ENHANCEMENT ADVISORY SERVICES, LLC Reduced -35,128-35.1k
O'SHAUGHNESSY ASSET MANAGEMENT, LLC Reduced -21,380-21.4k
CITADEL ADVISORS LLC Reduced -19,317-19.3k

Biggest calls

SUSQUEHANNA INTERNATIONAL GROUP, LLP Added $150.9k18.2k shares
SIMPLEX TRADING, LLC Added $37.0k4.5k shares
CITADEL ADVISORS LLC Reduced $36.5k4.4k shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. Unchanged $00 shares

Biggest puts

CITADEL ADVISORS LLC Added $18.2k2.2k shares
SIMPLEX TRADING, LLC Added $4.0k500 shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. Unchanged $00 shares

Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

HolderStakeChangeShares Last filed
Vahaviolos Aspasia Felice 13G · passive investor -0.1 pts · filed 2026-08-13 19.2% -0.1 pts 6.1m≈ $106.7m 2026-08-13
Foglia Stephanie Athena 13D · may seek influence no change · filed 2026-10-07
Stated purposeItem 4 of the Schedule 13D is hereby amended and restated in its entirety as follows: On September 17, 2026, the Issuer entered into an Agreement and Plan of Merger (the "Merger Agreement") with Athena Purchaser, LLC ("Parent") and Athena Merger Sub, Inc., a wholly owned subsidiary of Parent ("Merger Sub"). The Merger Agreement provides that, upon the terms and subject to the conditions set forth therein, Merger Sub will merge with and into the Issuer, with the Issuer surviving the merger as a wholly owned subsidiary of Parent (the "Merger"). At the effective time of the Merger (the "Effective Time"), each share of common stock, par value $0.01 per share, of the Issuer ("Common Stock") issued and outstanding immediately prior to the Effective Time (other than shares held by Parent, Merger… Full filing
19.1% no change 6.1m≈ $106.3m 2026-10-07
Mill Road Capital III, L.P. 13D · may seek influence +0.2 pts · filed 2026-09-18 6.1% +0.2 pts 1.9m≈ $33.9m 2026-09-18
DIMENSIONAL FUND ADVISORS LP 13G · institution new · filed 2025-07-15 5.2% new 1.6m≈ $28.4m 2025-07-15
Kyriakopoulos Kristy Vahaviolos 13G · passive investor -0.2 pts · filed 2026-03-31 5.1% -0.2 pts 1.6m≈ $28.2m 2026-03-31

Insider purchases and sales in Q2 2024

Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.

Officers and directors buying vs selling

Number of people, by quarter (10% owners not included)

BuyingSelling
202Q3 22: 0 buyingQ3 22: 0 sellingQ4 22: 0 buyingQ4 22: 0 sellingQ4 22Q1 23: 0 buyingQ1 23: 0 sellingQ2 23: 0 buyingQ2 23: 0 sellingQ2 23Q3 23: 0 buyingQ3 23: 0 sellingQ4 23: 2 buyingQ4 23: 1 sellingQ4 23Q1 24: 0 buyingQ1 24: 1 sellingQ2 24: 0 buyingQ2 24: 1 sellingQ2 24
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q3 20220—0——
Q4 20220—0——
Q1 20230—0——
Q2 20230—0——
Q3 20230—0——
Q4 20232$147.6k1$63.0k—
Q1 20240—1$42.6k—
Q2 20240—1$161.3k—
DateInsiderTradeSharesPrice ValueTheir holding
2024-06-20 GLANTON RICHARD H Director Sold 21,000 $7.68 $161.3k21.0k shares -33%

Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).

Holders, Q2 2024

#ManagerLocationShares Value% of their portfolioChangeShares change
1 Mill Road Capital Management LLC 6.74% of their portfolio Greenwich, CT 1,527,1201.5m $12.7m $12.7m 6.74% Added +12.2k +12,219
2 ROYCE & ASSOCIATES LP 0.12% of their portfolio New York, NY 1,520,2341.5m $12.6m $12.6m 0.12% Added +44.5k +44,499
3 BlackRock Inc. 0.00% of their portfolio New York, NY 1,384,2701.4m $11.5m $11.5m 0.00% Added +10.5k +10,474
4 DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio AUSTIN, TX 1,311,7151.3m $10.9m $10.9m 0.00% Added +44.5k +44,550
5 VANGUARD GROUP INC 0.00% of their portfolio Valley Forge, PA 1,216,5341.2m $10.1m $10.1m 0.00% Added +14.7k +14,670
6 Price Jennifer C. 8.87% of their portfolio NEW YORK, NY 919,484919.5k $7.6m $7.6m 8.87% Reduced -40.5k -40,516
7 FEDERATED HERMES, INC. 0.01% of their portfolio PITTSBURGH, PA 682,106682.1k $5.7m $5.7m 0.01% Unchanged
8 Invenomic Capital Management LP 0.29% of their portfolio BOSTON, MA 662,266662.3k $5.5m $5.5m 0.29% Reduced -120.4k -120,391
9 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 449,375449.4k $3.7m $3.7m 0.00% Added +21.9k +21,919
10 BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.08% of their portfolio HOUSTON, TX 404,582404.6k $3.4m $3.4m 0.08% Reduced -16.0k -15,960
11 Foundry Partners, LLC 0.17% of their portfolio MINNEAPOLIS, MN 376,120376.1k $3.1m $3.1m 0.17% Reduced -4.9k -4,891
12 Pacific Ridge Capital Partners, LLC 0.70% of their portfolio LAKE OSWEGO, OR 349,488349.5k $2.9m $2.9m 0.70% Reduced -13.3k -13,263
13 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 302,928302.9k $2.5m $2.5m 0.00% Reduced -712 -712
14 Acuitas Investments, LLC 1.30% of their portfolio Seattle, WA 292,264292.3k $2.4m $2.4m 1.30% Unchanged
15 JB CAPITAL PARTNERS LP 0.37% of their portfolio Armonk, NY 202,243202.2k $1.7m $1.7m 0.37% Unchanged
16 Empowered Funds, LLC 0.03% of their portfolio NEWTOWN SQUARE, PA 183,732183.7k $1.5m $1.5m 0.03% Reduced -157.5k -157,452
17 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 162,698162.7k $1.3m $1.3m 0.00% Reduced -2.7k -2,664
18 DEUTSCHE BANK AG\ 0.00% of their portfolio FRANKFURT AM MAIN, 2M 156,100156.1k $1.3m $1.3m 0.00% Unchanged
19 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 117,074117.1k $970.5k $970.5k 0.00% Reduced -235.6k -235,573
20 LAWSON KROEKER INVESTMENT MANAGEMENT INC/NE 0.17% of their portfolio OMAHA, NE 107,919107.9k $894.6k $894.6k 0.17% Reduced -4.0k -4,008
21 Verdad Advisers, LP 1.01% of their portfolio BOSTON, MA 105,995106.0k $878.7k $878.7k 1.01% Reduced -6.0k -6,005
22 RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio NEW YORK, NY 104,900104.9k $869.6k $869.6k 0.00% Added +11.1k +11,100
23 Invesco Ltd. 0.00% of their portfolio ATLANTA, GA 96,30396.3k $798.4k $798.4k 0.00% Reduced -14.5k -14,452
24 JACOBS LEVY EQUITY MANAGEMENT, INC 0.00% of their portfolio FLORHAM PARK, NJ 96,14196.1k $797.0k $797.0k 0.00% Added +65.9k +65,922
25 TRUIST FINANCIAL CORP 0.00% of their portfolio CHARLOTTE, NC 94,56694.6k $784.0k $784.0k 0.00% Added +513 +513
26 Bank of New York Mellon Corp 0.00% of their portfolio NEW YORK, NY 82,98883.0k $688.0k $688.0k 0.00% Added +10.0k +10,046
27 Connor, Clark & Lunn Investment Management Ltd. 0.00% of their portfolio VANCOUVER, A1 80,71080.7k $669.1k $669.1k 0.00% Added +30.0k +29,964
28 Nuveen Asset Management, LLC 0.00% of their portfolio CHICAGO, IL 79,01779.0k $655.1k $655.1k 0.00% Unchanged
29 MERCER GLOBAL ADVISORS INC /ADV 0.00% of their portfolio DENVER, CO 72,36372.4k $599.9k $599.9k 0.00% New
30 RBF Capital, LLC 0.03% of their portfolio RENO, NV 68,56168.6k $568.4k $568.4k 0.03% Reduced -14.2k -14,160
31 Assenagon Asset Management S.A. 0.00% of their portfolio SENNINGERBERG, N4 68,35168.4k $566.6k $566.6k 0.00% Reduced -1.7k -1,668
32 STRS OHIO 0.00% of their portfolio COLUMBUS, OH 61,40061.4k $509.0k $509.0k 0.00% Added +40.9k +40,900
33 O'SHAUGHNESSY ASSET MANAGEMENT, LLC 0.01% of their portfolio Stamford, CT 61,28361.3k $508.0k $508.0k 0.01% Reduced -21.4k -21,380
34 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio SAN FRANCISCO, CA 58,24658.2k $482.9k $482.9k 0.00% Added +3.6k +3,615
35 TWO SIGMA ADVISERS, LP 0.00% of their portfolio NEW YORK, NY 53,22453.2k $441.2k $441.2k 0.00% Added +15.8k +15,800
36 GSA CAPITAL PARTNERS LLP 0.03% of their portfolio LONDON, X0 45,83545.8k $380.0k $380.0k 0.03% Added +33.7k +33,740
37 Values First Advisors, Inc. 0.22% of their portfolio JOHNSON CITY, TN 43,68143.7k $362.1k $362.1k 0.22% Reduced -78 -78
38 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 43,67143.7k $362.0k $362.0k 0.00% Added +2.5k +2,510
39 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 43,47543.5k $360.4k $360.4k 0.00% Added +36.1k +36,121
40 Petrus Trust Company, LTA 0.03% of their portfolio Dallas, TX 43,01543.0k $356.6k $356.6k 0.03% Added +16.6k +16,620
41 ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.00% of their portfolio BOSTON, MA 39,61239.6k $328.0k $328.0k 0.00% Added +598 +598
42 TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio NEW YORK, NY 36,25036.2k $300.5k $300.5k 0.00% Added +22.7k +22,718
43 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 34,14334.1k $283.0k $283.0k 0.00% Added +13.8k +13,800
44 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 32,82332.8k $272.1k $272.1k 0.00% New
45 RITHOLTZ WEALTH MANAGEMENT 0.01% of their portfolio NEW YORK, NY 31,67431.7k $262.6k $262.6k 0.01% Reduced -3.8k -3,849
46 BAILARD, INC. 0.01% of their portfolio Foster City, CA 30,09130.1k $249.5k $249.5k 0.01% Reduced -5.6k -5,600
47 RHUMBLINE ADVISERS 0.00% of their portfolio BOSTON, MA 26,25026.2k $217.6k $217.6k 0.00% Added +2.9k +2,884
48 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 24,76924.8k $205.3k $205.3k 0.00% Reduced -19.3k -19,317
49 NJ State Employees Deferred Compensation Plan 0.02% of their portfolio TRENTON, NJ 24,00024.0k $199.0k $199.0k 0.02% Unchanged
50 Hillsdale Investment Management Inc. 0.02% of their portfolio Toronto, A6 23,30023.3k $193.2k $193.2k 0.02% New
51 JANE STREET GROUP, LLC 0.00% of their portfolio NEW YORK, NY 23,29223.3k $193.1k $193.1k 0.00% New
52 MACKENZIE FINANCIAL CORP 0.00% of their portfolio TORONTO ONTARIO, A6 22,26822.3k $184.6k $184.6k 0.00% Added +621 +621
53 LSV ASSET MANAGEMENT 0.00% of their portfolio CHICAGO, IL 22,10022.1k $183.0k $183.0k 0.00% Unchanged
54 OLD NATIONAL BANCORP /IN/ 0.00% of their portfolio EVANSVILLE, IN 20,00020.0k $165.8k $165.8k 0.00% Unchanged
55 UBS Group AG 0.00% of their portfolio ZURICH, V8 19,98120.0k $165.6k $165.6k 0.00% Reduced -1.2k -1,250
56 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 19,10419.1k $158.4k $158.4k 0.00% Reduced -39.5k -39,544
57 Walleye Capital LLC 0.00% of their portfolio NEW YORK, NY 18,95619.0k $157.1k $157.1k 0.00% Added +4.9k +4,908
58 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 17,27817.3k $143.2k $143.2k 0.00% Reduced -5.1k -5,126
59 AMERIPRISE FINANCIAL INC 0.00% of their portfolio MINNEAPOLIS, MN 16,67516.7k $138.2k $138.2k 0.00% Reduced -95 -95
60 ROYAL BANK OF CANADA 0.00% of their portfolio TORONTO, A6 16,65116.7k $138.0k $138.0k 0.00% Added +1.5k +1,484
61 WEALTH ENHANCEMENT ADVISORY SERVICES, LLC 0.00% of their portfolio PLYMOUTH, MN 15,30315.3k $126.9k $126.9k 0.00% Reduced -35.1k -35,128
62 AMERICAN CENTURY COMPANIES INC 0.00% of their portfolio KANSAS CITY, MO 14,53614.5k $120.5k $120.5k 0.00% Added +3.1k +3,143
63 MetLife Investment Management, LLC 0.00% of their portfolio Whippany, NJ 11,86411.9k $98.4k $98.4k 0.00% Added +5.3k +5,349
64 Trexquant Investment LP 0.00% of their portfolio STAMFORD, CT 11,27711.3k $93.5k $93.5k 0.00% New
65 Corebridge Financial, Inc. 0.00% of their portfolio HOUSTON, TX 11,16311.2k $92.5k $92.5k 0.00% First filing
66 BANK OF MONTREAL /CAN/ 0.00% of their portfolio TORONTO, A6 10,95111.0k $94.5k $94.5k 0.00% New
67 MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% of their portfolio CAUSEWAY BAY, K3 9,7629.8k $80.9k $80.9k 0.00% First filing
68 NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio ALBANY, NY 6,7766.8k $56.2k $56.2k 0.00% Reduced -489 -489
69 CITIGROUP INC 0.00% of their portfolio NEW YORK, NY 4,6584.7k $38.6k $38.6k 0.00% Added +752 +752
70 PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO 0.00% of their portfolio COLUMBUS, OH 4,2854.3k $35.5k $35.5k 0.00% Reduced -259 -259
71 BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio PARIS, I0 4,2464.2k $35.2k $35.2k 0.00% Reduced -5.7k -5,681
72 TD Waterhouse Canada Inc. 0.00% of their portfolio TORONTO, A6 2,8702.9k $23.2k $23.2k 0.00% Unchanged
73 Tower Research Capital LLC (TRC) 0.00% of their portfolio NEW YORK, NY 2,7562.8k $22.8k $22.8k 0.00% Added +1.8k +1,773
74 US BANCORP \DE\ 0.00% of their portfolio MINNEAPOLIS, MN 1,9762.0k $16.4k $16.4k 0.00% New
75 Legal & General Group Plc 0.00% of their portfolio London, X0 1,8731.9k $15.5k $15.5k 0.00% Unchanged
76 Ameritas Investment Partners, Inc. 0.00% of their portfolio LINCOLN, NE 1,7201.7k $14.3k $14.3k 0.00% Unchanged
77 INNEALTA CAPITAL, LLC 0.00% of their portfolio AUSTIN, TX 1,6531.7k $13.7k $13.7k 0.00% New
78 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio WEST SACRAMENTO, CA 1,5041.5k $12.5k $12.5k 0.00% Reduced -590 -590
79 FMR LLC 0.00% of their portfolio BOSTON, MA 915915 $7.6k $7.6k 0.00% Added +608 +608
80 Investors Research Corp 0.00% of their portfolio ATLANTA, GA 800800 $6.6k $6.6k 0.00% Unchanged
81 Key Financial Inc 0.00% of their portfolio WEST CHESTER, PA 785785 $6.5k $6.5k 0.00% Unchanged
82 SIMPLEX TRADING, LLC 0.00% of their portfolio CHICAGO, IL 723723 $5.0k $5.0k 0.00% New
83 AMALGAMATED BANK 0.00% of their portfolio NEW YORK, NY 702702 $6.0k $6.0k 0.00% Unchanged
84 LAZARD ASSET MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 606606 $5.0k $5.0k 0.00% New
85 Arax Advisory Partners 0.00% of their portfolio NEW YORK, NY 320320 $2.7k $2.7k 0.00% New
86 OSAIC HOLDINGS, INC. 0.00% of their portfolio SCOTTSDALE, AZ 300300 $2.5k $2.5k 0.00% New
87 COMERICA BANK 0.00% of their portfolio DALLAS, TX 167167 $1.4k $1.4k 0.00% Unchanged
88 CWM, LLC 0.00% of their portfolio OMAHA, NE 6565 $1.0k $1.0k 0.00% Added +64 +64
89 GAMMA Investing LLC 0.00% of their portfolio FOSTER CITY, CA 2424 $199 $199 0.00% New
90 Archer Investment Corp 0.00% of their portfolio Carmel, IN 1010 $83 $83 0.00% New
91 CONCOURSE FINANCIAL GROUP SECURITIES, INC. 0.00% of their portfolio BIRMINGHAM, AL 00 $0 $0 0.00% Unchanged