---
schema_version: "secwatch.filing_event.v1"
accession: "0001436126-25-000013"
form_type: "8-K"
ticker: "MG"
cik: "0001436126"
company_name: "Mistras Group, Inc."
filed_at: "2025-02-07T23:59:59+00:00"
generated_at: "2026-05-27T00:53:10.209483+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# MISTRAS founder Dr. Sotirios Vahaviolos passes away; company affirms continuity

## Summary
- Dr. Sotirios Vahaviolos, founder and Chairman Emeritus, passed away on February 6, 2025.
- He founded MISTRAS in 1978, building it into a global NDT leader with over 5,000 employees.
- Board states no changes to management or strategic direction; succession planned for years.
- Executive Chairman Manny Stamatakis expressed gratitude for Vahaviolos' legacy and contributions.

## SEC filing metadata
- accession: 0001436126-25-000013
- form_type: 8-K
- ticker: MG
- cik: 0001436126
- company_name: Mistras Group, Inc.
- filed_at: 2025-02-07T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 7.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1436126/000143612625000013/0001436126-25-000013-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1436126/000143612625000013/sjv8-k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001436126-25-000013
- JSON: https://secwatch.observer/filing/0001436126-25-000013.json
- Plain text: https://secwatch.observer/filing/0001436126-25-000013.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.