{"schema_version":"secwatch.filing_event.v1","accession":"0000950170-23-057283","form_type":"8-K","ticker":"UCTT","cik":"0001275014","company_name":"Ultra Clean Holdings, Inc.","filed_at":"2023-11-01T23:59:59+00:00","discovered_at":"2026-05-14T18:03:28.497317+00:00","generated_at":"2026-06-09T02:04:42.556547+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.35,"calibrated_materiality_score":0.35,"confidence":"high","headline":"Ultra Clean COO Vijayan Chinnasami to depart effective December 31, 2023","bullets":["Vijayan Chinnasami, Chief Operating Officer, will leave Ultra Clean Holdings on December 31, 2023.","Decision made on October 30, 2023; no successor named in the filing.","Chinnasami's departure is effective at year-end 2023."],"urls":{"canonical":"https://secwatch.observer/filing/0000950170-23-057283","json":"https://secwatch.observer/filing/0000950170-23-057283.json","markdown":"https://secwatch.observer/filing/0000950170-23-057283.md","text":"https://secwatch.observer/filing/0000950170-23-057283.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1275014/000095017023057283/0000950170-23-057283-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1275014/000095017023057283/uctt-20231030.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-09T02:04:42.556547+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":"9465f62a13","claim":"Vijayan Chinnasami departed as Chief Operating Officer at Ultra Clean Holdings, Inc..","evidence_excerpt":"On October 30, 2023, it was decided that Vijayan Chinnasami, the Chief Operating Officer of Ultra Clean Holdings, Inc. (the “Company”), will be leaving the Company effective December 31, 2023.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1275014/000095017023057283/0000950170-23-057283-index.htm","confidence":1.0,"family_label":"Executive change","details":[{"label":"Action","value":"leaving"},{"label":"Role","value":"Chief Operating Officer"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}