{"schema_version":"secwatch.filing_event.v1","accession":"0001899287-26-000022","form_type":"8-K","ticker":"AMPX","cik":"0001899287","company_name":"Amprius Technologies, Inc.","filed_at":"2026-04-21T23:59:59+00:00","discovered_at":"2026-05-14T18:02:33.257262+00:00","generated_at":"2026-05-15T05:10:20.515895+00:00","sec_items":["4.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.6,"calibrated_materiality_score":0.6,"confidence":"high","headline":"Amprius Tech dismisses BDO, appoints Deloitte as auditor for FY2026","bullets":["Audit Committee dismissed BDO USA, P.C. effective Apr 17, 2026; Deloitte & Touche LLP engaged for FY2026 audit.","BDO's reports for 2024 and 2025 were unqualified with no adverse opinion or scope modification.","No disagreements or reportable events between the Company and BDO during 2024, 2025, or interim 2026.","BDO furnished a letter to the SEC (Exhibit 16.1) agreeing with the Company's disclosures."],"urls":{"canonical":"https://secwatch.observer/filing/0001899287-26-000022","json":"https://secwatch.observer/filing/0001899287-26-000022.json","markdown":"https://secwatch.observer/filing/0001899287-26-000022.md","text":"https://secwatch.observer/filing/0001899287-26-000022.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1899287/000189928726000022/0001899287-26-000022-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1899287/000189928726000022/ampx-20260417.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-15T05:10:20.515895+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":"08e70cdefdc10564f621313d4b8a2f54db018448","claim":"Amprius Technologies, Inc. dismissed BDO USA, P.C. as its auditor.","evidence_excerpt":"and notified BDO that they will not be engaged to audit the Company's consolidated financial statements for the year ending December 31, 2026","evidence_source":"SEC 8-K Item 4.01/4.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1899287/000189928726000022/0001899287-26-000022-index.htm","confidence":0.9},{"claim_id":"b4f130740968ff62429bab29ea870a0449b0d951","claim":"Amprius Technologies, Inc. engaged Deloitte & Touche LLP as its auditor.","evidence_excerpt":"as the Company's independent registered public accounting firm to audit the Company’s consolidated financial statements for the year ending December 31, 2026, effective as of April 21, 2026","evidence_source":"SEC 8-K Item 4.01/4.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1899287/000189928726000022/0001899287-26-000022-index.htm","confidence":0.9}],"comparable_filings":[{"accession":"0001288469-26-000045","ticker":"MXL","company_name":"MAXLINEAR, INC","filed_at":"2026-06-01T20:35:55+00:00","headline":"MaxLinear dismisses Grant Thornton, appoints KPMG as auditor for FY2026","event_type":"other_material","sec_items":["4.01","9.01"],"materiality_score":0.5,"calibrated_materiality_score":0.5,"match_reasons":["same fact type: auditor_change","same SEC item: 4.01, 9.01","same event type: other_material","similar materiality"],"urls":{"canonical":"https://secwatch.observer/filing/0001288469-26-000045","json":"https://secwatch.observer/filing/0001288469-26-000045.json","markdown":"https://secwatch.observer/filing/0001288469-26-000045.md","edgar_index":"https://www.sec.gov/Archives/edgar/data/1288469/000128846926000045/0001288469-26-000045-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1288469/000128846926000045/mxl-20260528.htm"},"side_by_side_evidence":{"fact_type":"auditor_change","source_excerpt":"and notified BDO that they will not be engaged to audit the Company's consolidated financial statements for the year ending December 31, 2026","source_evidence_url":"https://www.sec.gov/Archives/edgar/data/1899287/000189928726000022/0001899287-26-000022-index.htm","comparable_excerpt":"On May 28, 2026 (the “Effective Date”), MaxLinear, Inc. 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