{"schema_version":"secwatch.filing_event.v1","accession":"0001436126-23-000045","form_type":"8-K","ticker":"MG","cik":"0001436126","company_name":"Mistras Group, Inc.","filed_at":"2023-10-13T23:59:59+00:00","discovered_at":"2026-05-14T18:03:29.073926+00:00","generated_at":"2026-06-09T23:57:27.167322+00:00","sec_items":["5.02","7.01","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"Mistras Chairman Vahaviolos retires, becomes Strategic Advisor; interim CEO granted 250k options","bullets":["Sotirios Vahaviolos retired as Executive Chairman, becomes Strategic Advisor to CEO; total comp unchanged at $300k ($100k salary + $200k director fees).","Manuel Stamatakis appointed Chairman of the Board and Interim President/CEO; granted 250k stock options at $5.36 exercise price.","Options granted as inducement for Stamatakis to accept interim CEO role; exercisable for 10 years or 1 year after termination.","Grant date October 11, 2023; exercise price equals NYSE closing price that day."],"urls":{"canonical":"https://secwatch.observer/filing/0001436126-23-000045","json":"https://secwatch.observer/filing/0001436126-23-000045.json","markdown":"https://secwatch.observer/filing/0001436126-23-000045.md","text":"https://secwatch.observer/filing/0001436126-23-000045.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1436126/000143612623000045/0001436126-23-000045-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1436126/000143612623000045/mg-20231010.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-09T23:57:27.167322+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[{"claim_id":"aa89b84c2e","claim":"Sotirios Vahaviolos retired as Executive Chairman at Mistras Group, Inc..","evidence_excerpt":"Mistras Group, Inc. (the “Company”) announced on October 9, 2023, that its then Executive Chairman, Sotirios Vahaviolos, was retiring as Chairman.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1436126/000143612623000045/0001436126-23-000045-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"retired"},{"label":"Role","value":"Executive Chairman"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}