{"schema_version":"secwatch.filing_event.v1","accession":"0001899287-25-000048","form_type":"8-K","ticker":"AMPX","cik":"0001899287","company_name":"Amprius Technologies, Inc.","filed_at":"2025-12-22T23:59:59+00:00","discovered_at":"2026-05-14T18:02:41.020725+00:00","generated_at":"2026-05-16T12:27:52.304505+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.65,"calibrated_materiality_score":0.65,"confidence":"high","headline":"Amprius CEO Kang Sun steps down Dec 31; President Tom Stepien appointed CEO effective Jan 1, 2026","bullets":["CEO Kang Sun to step down effective Dec 31, 2025; remains on Board as Executive Advisor from Jan 1, 2026.","New employment agreement for Sun: $633k annual salary, no annual bonus, eligible for equity vesting, severance of 6 months base salary.","President Tom Stepien appointed CEO effective Jan 1, 2026; receives $633k base salary, target bonus 100% of base.","Stepien granted 200,000 RSUs vesting 25% at 1-year anniversary, remainder quarterly over 3 years.","Stepien previously CEO of South 8 Technologies and Operating Partner at KCK Group; transition not due to disagreement."],"urls":{"canonical":"https://secwatch.observer/filing/0001899287-25-000048","json":"https://secwatch.observer/filing/0001899287-25-000048.json","markdown":"https://secwatch.observer/filing/0001899287-25-000048.md","text":"https://secwatch.observer/filing/0001899287-25-000048.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1899287/000189928725000048/0001899287-25-000048-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1899287/000189928725000048/ampx-20251218.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-16T12:27:52.304505+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"}