MG

MG · Mistras Group Inc Common Stock

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September 25, 2026

Mistras Group (MG) Enters $866M All‑Cash Deal with H.I.G. Capital. Mistras Group announced a definitive agreement to be acquired by affiliates of H.I.G. Capital in an all‑cash transaction valued at about $866 million, pricing the deal at $20.35 per share. The news lifted the shares, pushing the stock to its 52‑week high. At the same time, Mistras began using Sidetrade’s autonomous AI agents, which the company says will boost its digital capabilities. Together, the pending go‑private transaction and the AI adoption mark a significant shift in the company’s strategy.

this person other insiders at MG

Insiders & Stakes

Stephanie Athena Foglia3,923,718
Shares held
Vahaviolos Sotirios J.
Executive Chairman
3,890,699
Shares held
Aspasia Felice Vahaviolos
10% Owner
2,154,541
Shares held
Manuel N. Stamatakis
Director
509,795
Shares held
Bertolotti Dennis
President and CEO
424,358
Shares held
Nicholas Debenedictis
Director
248,820
Shares held
Lange Michael J.
Senior EVP
240,515
Shares held
Wolk Jonathan H
Sr. EVP and COO
194,575
Shares held
James J. Forese
Director
177,043
Shares held
Edward J. Prajzner
EVP, CFO and Treasurer
148,076
Shares held
Natalia Shuman-Fabbri
Director
123,780
Shares held
Smith John Anthony
Executive Vice President
100,447
Shares held
Michelle Lohmeier
Director
99,223
Shares held
Michael C. Keefe
EVP, General Counsel
91,558
Shares held
Charles P. Pizzi
Director
73,480
Shares held
Richard H. Glanton
Director
68,431
Shares held
Hanei Wail Hammad
EVP & Chief Transformation Off
61,777
Shares held
Gennaro A. D'Alterio
EVP, Chief Commercial Officer
47,239
Shares held
Eileen Mary Coggins
Chief Legal Officer
13,364
Shares held
Sotirios Vahaviolos January 2023 2-Year Grantor Retained Annuity Trust
10% Owner
0
Shares held

Transaction History

Eileen Mary Coggins▼ Sell$32K
Stephanie Athena Foglia▼ Sell$0
Aspasia Felice Vahaviolos▼ Sell$0
Natalia Shuman-Fabbri▼ Sell$47K
Aspasia Felice Vahaviolos▼ Sell$0
Stephanie Athena Foglia▼ Sell$0
Richard H. Glanton▲ Buy$0
Nicholas Debenedictis▲ Buy$0
James J. Forese▲ Buy$0
Michelle Lohmeier▲ Buy$0
Charles P. Pizzi▲ Buy$0
Stephanie Athena Foglia▼ Sell$0
Stephanie Athena Foglia▼ Sell$18K
Hanei Wail Hammad▼ Sell$43K
Edward J. Prajzner▼ Sell$19K
Edward J. Prajzner▼ Sell$33K
Edward J. Prajzner▼ Sell$38K
Gennaro A. D'Alterio▼ Sell$3K
Hanei Wail Hammad▼ Sell$5K
Edward J. Prajzner▼ Sell$11K
Manuel N. Stamatakis▼ Sell$13K
Stephanie Athena Foglia▼ Sell$16K
Gennaro A. D'Alterio▼ Sell$10K
Gennaro A. D'Alterio▼ Sell$13K
Edward J. Prajzner▼ Sell$20K
Natalia Shuman-Fabbri▲ Buy$0
Manuel N. Stamatakis▲ Buy$0
Edward J. Prajzner▲ Buy$0
Hanei Wail Hammad▲ Buy$0
Eileen Mary Coggins▲ Buy$0
Gennaro A. D'Alterio▲ Buy$0
Stephanie Athena Foglia▼ Sell$15K
Stephanie Athena Foglia▼ Sell$14K
Edward J. Prajzner▼ Sell$34K
Manuel N. Stamatakis▲ Buy$0
Aspasia Felice Vahaviolos▼ Sell$0
Aspasia Felice Vahaviolos▼ Sell$0
Charles P. Pizzi▼ Sell$0
Gennaro A. D'Alterio▼ Sell$5K
Eileen Mary Coggins▲ Buy$143K
Natalia Shuman-Fabbri▲ Buy$0
Aspasia Felice Vahaviolos▼ Sell$0
Sotirios Vahaviolos January 2023 2-Year Grantor Retained Annuity Trust▼ Sell$0
Manuel N. Stamatakis▲ Buy$77K
Charles P. Pizzi▲ Buy$0
Nicholas Debenedictis▲ Buy$0
Richard H. Glanton▲ Buy$0
James J. Forese▲ Buy$0
Michelle Lohmeier▲ Buy$0
Hanei Wail Hammad▼ Sell$69K
Nicholas Debenedictis▲ Buy$10K
Manuel N. Stamatakis▲ Buy$100K
Nicholas Debenedictis▲ Buy$90K
Gennaro A. D'Alterio▼ Sell$6K
Michael C. Keefe▼ Sell$8K
Michael C. Keefe▼ Sell$10K
Edward J. Prajzner▼ Sell$15K
Edward J. Prajzner▼ Sell$13K
Edward J. Prajzner▼ Sell$6K
Nicholas Debenedictis▲ Buy$98K
Edward J. Prajzner▲ Buy$0
Gennaro A. D'Alterio▲ Buy$0
Michael C. Keefe▲ Buy$0
Gennaro A. D'Alterio▲ Buy$0
Michael C. Keefe▲ Buy$0
Hanei Wail Hammad▲ Buy$0
Hanei Wail Hammad▲ Buy$0
Edward J. Prajzner▲ Buy$0
Manuel N. Stamatakis▲ Buy$0
Edward J. Prajzner▼ Sell$25K
Michael C. Keefe▼ Sell$29K
Gennaro A. D'Alterio▼ Sell$6K
Lange Michael J.▼ Sell$68K
Lange Michael J.▼ Sell$211K
Lange Michael J.▼ Sell$138K
Lange Michael J.▼ Sell$272K
Lange Michael J.▼ Sell$127K
Lange Michael J.▼ Sell$54K
Lange Michael J.▼ Sell$147K
Lange Michael J.▼ Sell$76K
Michelle Lohmeier▲ Buy$0
Richard H. Glanton▲ Buy$0
James J. Forese▲ Buy$0
Nicholas Debenedictis▲ Buy$0
Charles P. Pizzi▲ Buy$0
Richard H. Glanton▼ Sell$0
Richard H. Glanton▼ Sell$0
Richard H. Glanton▼ Sell$161K
Manuel N. Stamatakis▲ Buy$0
Edward J. Prajzner▼ Sell$4K
Edward J. Prajzner▼ Sell$8K
Smith John Anthony▼ Sell$10K
Lange Michael J.▼ Sell$7K
Lange Michael J.▼ Sell$6K
Michael C. Keefe▼ Sell$4K
Michael C. Keefe▼ Sell$7K
Hanei Wail Hammad▲ Buy$0
Charles P. Pizzi▲ Buy$0
Richard H. Glanton▲ Buy$0
James J. Forese▲ Buy$0
Nicholas Debenedictis▲ Buy$0
Michelle Lohmeier▲ Buy$0
Lange Michael J.▼ Sell$43K
Sotirios Vahaviolos January 2023 2-Year Grantor Retained Annuity Trust▼ Sell$0
Vahaviolos Sotirios J.▼ Sell$0
Lange Michael J.▲ Buy$0
Michael C. Keefe▲ Buy$0
Gennaro A. D'Alterio▲ Buy$0
Edward J. Prajzner▲ Buy$0
Smith John Anthony▲ Buy$0
Lange Michael J.▼ Sell$42K
Michael C. Keefe▼ Sell$29K
Edward J. Prajzner▼ Sell$25K
Nicholas Debenedictis▲ Buy$21K
Nicholas Debenedictis▲ Buy$13K
Nicholas Debenedictis▲ Buy$650
Richard H. Glanton▲ Buy$0
Smith John Anthony▼ Sell$63K
Nicholas Debenedictis▲ Buy$22K
Nicholas Debenedictis▲ Buy$696
Manuel N. Stamatakis▲ Buy$90K
Gennaro A. D'Alterio▲ Buy$0
Manuel N. Stamatakis▲ Buy$0
Michelle Lohmeier▲ Buy$0
James J. Forese▲ Buy$0
Nicholas Debenedictis▲ Buy$0
Charles P. Pizzi▲ Buy$0
Bertolotti Dennis▼ Sell$21K
Edward J. Prajzner▼ Sell$3K
Lange Michael J.▼ Sell$4K
Michael C. Keefe▼ Sell$3K
Michael C. Keefe▼ Sell$4K
Edward J. Prajzner▼ Sell$13K
Michael C. Keefe▼ Sell$14K
Bertolotti Dennis▼ Sell$28K
Edward J. Prajzner▼ Sell$3K
Lange Michael J.▼ Sell$18K
Lange Michael J.▼ Sell$7K
Bertolotti Dennis▼ Sell$84K
Edward J. Prajzner▲ Buy$0
Charles P. Pizzi▲ Buy$0
Michelle Lohmeier▲ Buy$0
James J. Forese▲ Buy$0
Nicholas Debenedictis▲ Buy$0
Manuel N. Stamatakis▲ Buy$0
Vahaviolos Sotirios J.▼ Sell$0
Wolk Jonathan H▼ Sell$24K
Edward J. Prajzner▼ Sell$7K
Lange Michael J.▼ Sell$19K
Michael C. Keefe▼ Sell$11K
Bertolotti Dennis▼ Sell$57K
Charles P. Pizzi▲ Buy$0
Michelle Lohmeier▲ Buy$0
Nicholas Debenedictis▲ Buy$0
Manuel N. Stamatakis▲ Buy$0
James J. Forese▲ Buy$0
Richard H. Glanton▲ Buy$5K
Wolk Jonathan H▼ Sell$7K
Edward J. Prajzner▼ Sell$3K
Lange Michael J.▼ Sell$4K
Lange Michael J.▼ Sell$7K
Michael C. Keefe▼ Sell$3K
Michael C. Keefe▼ Sell$4K
Bertolotti Dennis▼ Sell$16K
Bertolotti Dennis▼ Sell$24K
Wolk Jonathan H▼ Sell$11K
Edward J. Prajzner▼ Sell$3K
Michael C. Keefe▼ Sell$5K
Wolk Jonathan H▼ Sell$11K
Edward J. Prajzner▼ Sell$4K
Bertolotti Dennis▼ Sell$26K
Lange Michael J.▼ Sell$9K
Edward J. Prajzner▲ Buy$0
Lange Michael J.▲ Buy$0
Bertolotti Dennis▲ Buy$0
Michael C. Keefe▲ Buy$0
Wolk Jonathan H▲ Buy$0
Nicholas Debenedictis▲ Buy$0
James J. Forese▲ Buy$0
Charles P. Pizzi▲ Buy$0
Michelle Lohmeier▲ Buy$0
Manuel N. Stamatakis▲ Buy$0
Edward J. Prajzner▲ Buy$0
Bertolotti Dennis▲ Buy$0
Lange Michael J.▲ Buy$0
Lange Michael J.▼ Sell$0
Michael C. Keefe▲ Buy$0
Michael C. Keefe▼ Sell$0
Edward J. Prajzner▼ Sell$0
Wolk Jonathan H▲ Buy$0
Wolk Jonathan H▼ Sell$0
Bertolotti Dennis▼ Sell$0
Wolk Jonathan H▼ Sell$37K
Vahaviolos Sotirios J.▼ Sell$17K
Edward J. Prajzner▼ Sell$7K
Bertolotti Dennis▼ Sell$72K
Lange Michael J.▼ Sell$28K
Michael C. Keefe▼ Sell$16K
Wolk Jonathan H▼ Sell$3K
Bertolotti Dennis▼ Sell$9K

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