{"schema_version":"secwatch.filing_event.v1","accession":"0001628280-26-003715","form_type":"8-K","ticker":"UCTT","cik":"0001275014","company_name":"Ultra Clean Holdings, Inc.","filed_at":"2026-01-28T23:59:59+00:00","discovered_at":"2026-05-14T18:02:34.688363+00:00","generated_at":"2026-05-16T06:54:19.413508+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.55,"calibrated_materiality_score":0.55,"confidence":"high","headline":"Ultra Clean Holdings terminates COO Bajwa, appoints Robert Wunar as COO","bullets":["COO Harjinder Bajwa's employment terminated effective Jan 25, 2026; severance per company policy.","Robert Wunar appointed COO effective March 23, 2026; previously Managing Director at Applied Materials.","Wunar's annual salary $475,000; target bonus 85% of base; equity award $1.5M (half RSU, half PSU) subject to shareholder approval.","Sign-on bonus $200,000 subject to clawback if Wunar resigns or is fired for cause within 12 months."],"urls":{"canonical":"https://secwatch.observer/filing/0001628280-26-003715","json":"https://secwatch.observer/filing/0001628280-26-003715.json","markdown":"https://secwatch.observer/filing/0001628280-26-003715.md","text":"https://secwatch.observer/filing/0001628280-26-003715.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1275014/000162828026003715/0001628280-26-003715-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1275014/000162828026003715/uctt-20260125.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-16T06:54:19.413508+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"}