Mistras Group announces merger
- Merger with Athena Purchaser, LLC
- Shareholders to receive $20.35 per share
- Special meeting on [ ] 2026
MG
Mistras Group, Inc. SEC filings
Every EDGAR filing for Mistras Group, Inc. (MG), newest first, with AI summaries and stories.
- Ticker
- MG
- CIK
- 1436126
- Sector
- Business and consumer services
- Latest filing
- 3d
Next: earnings expected ~Nov 4 · 10-Q expected ~Nov 6 (deadline Nov 9)
Insider activity
No open-market insider buys in the last 30 days.
Also: 1 grant or exercise.
Filings
PREM14AMistras Group, Inc.MGLIVE SCHEDULE 13D/AMistras Group, Inc.MGLIVE Mistras Group, Inc. shares increased
- 17.4% ownership by Stephanie Foglia
- 12.3% ownership by 2025 Irrevocable Trust
- 19.1% ownership by Aspasia Vahaviolos
Stephanie Athena Foglia, filed by
4/AMistras Group, Inc.MGLIVE Mistras Group, Inc. (MG) reports ownership change.
- Reporting person: Vahaviolos Aspasia Felice
- Date of transaction: 09/10/2026
- Amount of common stock acquired: 387,093
Aspasia Felice Vahaviolos, reporting
4Mistras Group, Inc.MGLIVE Gennaro A. D'Alterio, insider filing for MG
Gennaro A. D'Alterio, reporting
4Mistras Group, Inc.MGLIVE Eileen Mary Coggins, insider filing for MG
Eileen Mary Coggins, reporting
SCHEDULE 13D/AMistras Group, Inc.MGLIVE Ownership stake disclosure by Stephanie Athena Foglia (amended)
Stephanie Athena Foglia, filed by
SCHEDULE 13D/AMistras Group, Inc.MGLIVE Ownership stake disclosure by Mill Road Capital III, L.P. (amended)
Mill Road Capital III, L.P., filed by
DEFA14AMistras Group, Inc.MGLIVE DEFA14AMistras Group, Inc.MGLIVE DEFA14AMistras Group, Inc.MGLIVE DEFA14AMistras Group, Inc.MGLIVE DEFA14AMistras Group, Inc.MGLIVE DEFA14AMistras Group, Inc.MGLIVE DEFA14AMistras Group, Inc.MGLIVE 8-KMistras Group, Inc.MGLIVE SCHEDULE 13D/AMistras Group, Inc.MGLIVE Ownership stake disclosure by Stephanie Athena Foglia (amended)
Stephanie Athena Foglia, filed by
4Mistras Group, Inc.MGLIVE 2 insider filings
Aspasia Felice Vahaviolos, insider filing for MG
Show all 2
- 4Insider filing for MG
- 4Insider filing for MG
Aspasia Felice Vahaviolos, reporting
4Mistras Group, Inc.MGLIVE Natalia Shuman-Fabbri, insider filing for MG
Natalia Shuman-fabbri, reporting
SCHEDULE 13G/AMistras Group, Inc.MGLIVE Ownership stake disclosure by Aspasia Felice Vahaviolos (amended)
Aspasia Felice Vahaviolos, filed by
10-QMistras Group, Inc.MGLIVE 8-KMistras Group, Inc.MGLIVE S-8Mistras Group, Inc.MGLIVE SCHEDULE 13D/AMistras Group, Inc.MGLIVE Ownership stake disclosure by Stephanie Athena Foglia (amended)
Stephanie Athena Foglia, filed by
4Mistras Group, Inc.MGLIVE 2 insider filings
Stephanie Athena Foglia, insider filing for MG
Show all 2
- 4Insider filing for MG
- 4Insider filing for MG
Stephanie Athena Foglia, reporting · 2025 Irrevocable Two-Year Grantor Retained Annuity Trust of Aspasia F. Vahaviolos, reporting
SCHEDULE 13D/AMistras Group, Inc.MGLIVE Ownership stake disclosure by Stephanie Athena Foglia (amended)
Stephanie Athena Foglia, filed by
4Mistras Group, Inc.MGLIVE 3 insider filings
Stephanie Athena Foglia, insider filing for MG
Show all 3
- 4Insider filing for MG
- 4Insider filing for MG
- 3New insider at MG
Stephanie Athena Foglia, reporting · 2025 Irrevocable Two-Year Grantor Retained Annuity Trust of Aspasia F. Vahaviolos, reporting
SDMistras Group, Inc.MGLIVE 4Mistras Group, Inc.MGLIVE 4 insider filings
Nicholas Debenedictis, insider filing for MG
Show all 4
- 4Insider filing for MG
- 4Insider filing for MG
- 4Insider filing for MG
- 4Insider filing for MG
Nicholas Debenedictis, reporting
4Mistras Group, Inc.MGLIVE Charles P Pizzi, insider filing for MG
Charles P Pizzi, reporting
8-KMistras Group, Inc.MGLIVE 10-QMistras Group, Inc.MGLIVE 8-KMistras Group, Inc.MGLIVE SCHEDULE 13D/AMistras Group, Inc.MGLIVE Ownership stake disclosure by Mill Road Capital III, L.P. (amended)
Mill Road Capital III, L.P., filed by
ARSMistras Group, Inc.MGLIVE DEFA14AMistras Group, Inc.MGLIVE DEF 14AMistras Group, Inc.MGLIVE SCHEDULE 13G/AMistras Group, Inc.MGLIVE 2 13G filings
Ownership stake disclosure by Kristy Vahaviolos Kyriakopoulos (amended)
Show all 2
- SCHEDULE 13G/AOwnership stake disclosure (amended)
- SCHEDULE 13GOwnership stake disclosure
Kristy Vahaviolos Kyriakopoulos, filed by
SCHEDULE 13DMistras Group, Inc.MGLIVE Ownership stake disclosure by Stephanie Athena Foglia
Stephanie Athena Foglia, filed by
4Mistras Group, Inc.MGLIVE Hanei Wail Hammad, insider filing for MG
Hanei Wail Hammad, reporting
4Mistras Group, Inc.MGLIVE Edward J Prajzner, insider filing for MG
Edward J Prajzner, reporting
4Mistras Group, Inc.MGLIVE Edward J Prajzner, insider filing for MG
Edward J Prajzner, reporting
10-KMistras Group, Inc.MGLIVE