Mistras Group, Inc. insider trading

Every open-market purchase and sale by Mistras Group, Inc.'s officers, directors and largest shareholders since November 4, 2021, and what the share price did next.

Insider purchases, 5 years $143,250 1 trade by 1 insider 3 months later: median +31.2% (+27.9% vs S&P 500) Insider sales, 5 years $61,700 4 trades by 1 insider 3 months later: median +16.1% (+12.1% vs S&P 500)

Insider purchase Insider sale Marker size reflects trade value. Weekly closes adjusted for splits; may be delayed.

Mistras Group, Inc. insider open-market trades
Date	Insider	Trade	Shares	Price	Value	1M after	3M after	6M after

From insiders' Form 4 filings with the SEC: open-market purchases and sales only (awards, option exercises and shares withheld for tax are excluded), combined to one line per insider per day. "Plan" marks trades the filing says were made under a pre-set Rule 10b5-1 trading plan, which are scheduled in advance. Price changes run from the close on the trade date; hover a figure for the change relative to the S&P 500. Past moves don't predict future ones.

Does following Mistras Group, Inc.’s insiders pay?

From April 22, 2010 to June 4, 2026, 21 insiders reported 43 open-market purchases and 62 sales not made under a pre-set plan in Mistras Group, Inc. Twelve months after each purchase was reported, the shares were −13.7% against the S&P 500 on average (median −20.9%), over 36 purchases with a full year of prices; 44% beat the index. After sales, the shares moved −18.9% against the index over 12 months (a negative figure means selling was the right call). Buying each purchase the day after it was reported, an equal amount each, held 12 months or until that insider reported a sale, would have turned $10,000 on April 23, 2010 into $22,885 by November 2, 2026, +5.2% a year. It held shares 74% of the time; the S&P 500 on those same days, with Treasury bills otherwise, made $62,911 (+11.8% a year), and held throughout $83,080 (+13.7%).

Copying Mistras Group, Inc.'s insidersS&P 500, same days investedS&P 500, held throughout $10,000 copying every open-market purchase by Mistras Group, Inc.'s insiders from April 23, 2010, before costs and taxes, marked weekly. Uninvested money earns the Treasury bill rate; the portfolio held shares 74% of the time.

Mistras Group, Inc.: each insider's record
Insider	Role	Purchases	12 months after their purchases	Beat the S&P 500	Sales	12 months after their sales	Latest report
Debenedictis Nicholas	Director	15	−30.9% (14)	21%	0	—	March 20, 2025
Stamatakis Manuel N.	Executive Chairman	14	−24.6% (13)	39%	1	—	June 6, 2025
Vahaviolos Sotirios J.	Executive Chairman	2	+80.7% (1)	100%	12	−23.1% (12)	April 1, 2020
Bertolotti Dennis	President and CEO	1	—	—	9	−25.3% (9)	March 31, 2020
Lange Michael J.	Senior EVP	0	—	—	10	−29.3% (10)	March 14, 2024
Genesi Ralph L.	Group EVP, Marketing and Sales	0	—	—	9	−6.5% (9)	May 22, 2015
Keefe Michael C	EVP, General Counsel	0	—	—	9	−16.6% (9)	June 8, 2018
Glanton Richard H	Director	0	—	—	5	−20.1% (5)	June 20, 2024
Wolk Jonathan H	Sr. EVP and COO	4	−2.2% (4)	75%	0	—	June 5, 2019
Forese James J	Director	2	+21.5% (1)	100%	0	—	March 31, 2020
Weldon Wayne Curtis	Director	1	—	—	1	−35.8% (1)	March 31, 2020
Burgess Elizabeth	Director	1	+49.6% (1)	100%	0	—	April 22, 2010
Carlos Mark F.	Group EVP, Products & Systems	0	—	—	1	+4.4% (1)	November 20, 2015
Coggins Eileen Mary	EVP & Chief Legal Officer	1	+103.7% (1)	100%	0	—	September 25, 2025
Cole Phillip T.	Group EVP, International	0	—	—	1	−36.7% (1)	November 13, 2012
Dickinson Daniel M	Director	1	+13.2% (1)	100%	0	—	May 5, 2010
Foglia Stephanie Athena	10% owner	0	—	—	1	—	June 4, 2026
Joyce Francis T	EVP, CFO and Treasurer	0	—	—	1	−2.6% (1)	August 14, 2013
Lohmeier Michelle	Director	1	—	—	0	—	March 31, 2020
Smith John Anthony	Executive Vice President	0	—	—	1	−1.1% (1)	November 15, 2023
Tc Ndt Holdings, L.L.C.	10% owner	0	—	—	1	+41.4% (1)	May 13, 2011

Moves are the shares’ return including dividends minus the S&P 500’s, from the close on the first trading day after each report; the number of trades with a finished 12-month window is in brackets. Green means the trade went the insider’s way (a purchase ahead of the index, a sale followed by the shares trailing it). A trade reported both by a director or officer and by a fund or company they are linked to counts once here, under the person. Purchases count only where the share price actually traded was at least $5. These figures describe what the shares did, not why anyone traded. Insiders across all companies.

When several insiders traded Mistras Group, Inc.

Months when 2 or more insiders became net buyers, or 3 or more net sellers, of Mistras Group, Inc. in reports dated in the 91 days before the month end, and how the stock did against the S&P 500 from that month end. After the 3 buying crowds with six months of prices, it averaged −18.1% against the index. After 3 selling crowds, −12.2%. One company's history is too short to judge by; the test across every company is the better guide.

Month	Crowd	3 months on, vs S&P 500	6 months	12 months
March 31, 2025	2 buying	−34.8%	−26.8%	+25.8%
December 31, 2018	2 buying	−20.6%	−17.4%	−32.0%
May 31, 2017	3 selling	−13.8%	+0.8%	−22.3%
January 30, 2015	3 selling	−16.0%	−17.0%	+10.8%
January 31, 2014	3 selling	−8.1%	−20.4%	−27.2%
May 28, 2010	2 buying	−9.1%	−10.0%	+16.1%

Colours show whether the crowd was right: green when buyers were followed by a rise above the index, or sellers by a fall below it. Total returns from the month end; past patterns are not a forecast.

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