{"schema_version":"secwatch.filing_event.v1","accession":"0001628280-24-009984","form_type":"8-K","ticker":"UCTT","cik":"0001275014","company_name":"Ultra Clean Holdings, Inc.","filed_at":"2024-03-08T23:59:59+00:00","discovered_at":"2026-05-14T18:03:23.649325+00:00","generated_at":"2026-06-05T00:24:10.296471+00:00","sec_items":["4.01","9.01"],"event_type":"other_material","sentiment":"negative","materiality_score":0.7,"calibrated_materiality_score":0.7,"confidence":"high","headline":"Ultra Clean Holdings (UCTT) replaces auditor Moss Adams with PwC; cites material weaknesses in internal controls","bullets":["Moss Adams resigned March 6, 2024; PwC appointed subject to acceptance procedures.","No disagreements between company and Moss Adams on accounting principles or audit scope.","Material weaknesses in internal control over financial reporting for FY 2023 not yet remediated.","Prior material weaknesses (ITGCs, ERP) as of Dec 2022 were remediated by Dec 29, 2023.","Weaknesses include control environment, risk assessment, inventory valuation, and business combination forecasts."],"urls":{"canonical":"https://secwatch.observer/filing/0001628280-24-009984","json":"https://secwatch.observer/filing/0001628280-24-009984.json","markdown":"https://secwatch.observer/filing/0001628280-24-009984.md","text":"https://secwatch.observer/filing/0001628280-24-009984.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1275014/000162828024009984/0001628280-24-009984-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1275014/000162828024009984/uctt-20240306.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-05T00:24:10.296471+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":"2eba00c25889e2d6678a0ce61b0be55b20533205","claim":"Moss Adams LLP resigned as auditor of Ultra Clean Holdings, Inc..","evidence_excerpt":"On March 6, 2024, (i) Moss Adams informed the Audit Committee that it was resigning as the Company’s independent registered public accounting firm","evidence_source":"SEC 8-K Item 4.01/4.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1275014/000162828024009984/0001628280-24-009984-index.htm","confidence":0.9,"family_label":"Auditor Changes","details":[{"label":"Action","value":"resignation"},{"label":"Auditor","value":"Moss Adams LLP"}],"fact_type":"auditor_change"},{"claim_id":"622f006be91eea7dfa648e35af4873f251412bef","claim":"Ultra Clean Holdings, Inc. engaged PricewaterhouseCoopers LLP as its auditor.","evidence_excerpt":"the Audit Committee approved the appointment of PricewaterhouseCoopers LLP (“PwC”) to serve as the Company’s independent registered public accounting firm for the fiscal year ending December 27, 2024","evidence_source":"SEC 8-K Item 4.01/4.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1275014/000162828024009984/0001628280-24-009984-index.htm","confidence":0.9,"family_label":"Auditor Changes","details":[{"label":"Action","value":"engagement"},{"label":"Auditor","value":"PricewaterhouseCoopers LLP"}],"fact_type":"auditor_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}