{"schema_version":"secwatch.filing_event.v1","accession":"0001104659-26-001352","form_type":"8-K","ticker":"TTEK","cik":"0000831641","company_name":"TETRA TECH INC","filed_at":"2026-01-06T23:59:59+00:00","discovered_at":"2026-05-14T18:02:37.796538+00:00","generated_at":"2026-05-16T11:36:12.091959+00:00","sec_items":["5.02","8.01","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.6,"calibrated_materiality_score":0.6,"confidence":"high","headline":"Tetra Tech appoints Roger Argus CEO, Dan Batrack becomes Executive Chairman effective Feb 19, 2026","bullets":["Roger Argus, currently President, will succeed Dan Batrack as CEO and join the Board on Feb 19, 2026.","Dan Batrack transitions to Executive Chairman for a minimum of two years, ensuring strategic continuity.","Argus has over 30 years at Tetra Tech, most recently as President and previously leading major divisions.","Batrack served as CEO for 20+ years, growing Tetra Tech to ~$5B revenue and 25,000 employees globally."],"urls":{"canonical":"https://secwatch.observer/filing/0001104659-26-001352","json":"https://secwatch.observer/filing/0001104659-26-001352.json","markdown":"https://secwatch.observer/filing/0001104659-26-001352.md","text":"https://secwatch.observer/filing/0001104659-26-001352.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/831641/000110465926001352/0001104659-26-001352-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/831641/000110465926001352/tm262000d1_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-16T11:36:12.091959+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":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}