secwatch.observer — SEC 8-K summary ====================================== Issuer: QUANTUM CORP /DE/ (QMCO) CIK: 0000709283 Form: 8-K Filed at: 2025-10-06T23:59:59+00:00 Accession: 0000709283-25-000061 Event type: other_material Sentiment: negative Materiality: 0.60 Item codes: 4.01, 9.01 LLM model: deepseek-v4-flash:cloud@v2 Quantum dismisses Grant Thornton, appoints CohnReznick as auditor; cites material weaknesses in internal controls -------------------------------------------------------------------------------- - Audit Committee dismissed Grant Thornton as independent auditor effective Sept 30, 2025, after competitive process. - Grant Thornton's reports for FY2025 and FY2024 included going-concern explanatory paragraph; no adverse opinions or disagreements. - Material weaknesses in internal controls reported regarding controls environment, revenue recognition, manufacturing inventory, and warrants. - Appointed CohnReznick as new auditor for FY2026, subject to standard client acceptance procedures. - No prior consultations with CohnReznick on accounting matters during the past two fiscal years. Source: EDGAR index: https://www.sec.gov/Archives/edgar/data/709283/000070928325000061/0000709283-25-000061-index.htm Primary doc: https://www.sec.gov/Archives/edgar/data/709283/000070928325000061/qtm-20250930.htm HTML page: https://secwatch.observer/filing/0000709283-25-000061 License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer