secwatch.observer — SEC 8-K summary
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Issuer:     Amprius Technologies, Inc. (AMPX)
CIK:        0001899287
Form:       8-K
Filed at:   2025-12-22T23:59:59+00:00
Accession:  0001899287-25-000048
Event type: leadership
Sentiment:  neutral
Materiality: 0.65
Item codes: 5.02
LLM model:  deepseek-v4-flash:cloud@v2

Amprius CEO Kang Sun steps down Dec 31; President Tom Stepien appointed CEO effective Jan 1, 2026
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- 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.

Source:
  EDGAR index:    https://www.sec.gov/Archives/edgar/data/1899287/000189928725000048/0001899287-25-000048-index.htm
  Primary doc:    https://www.sec.gov/Archives/edgar/data/1899287/000189928725000048/ampx-20251218.htm
  HTML page:      https://secwatch.observer/filing/0001899287-25-000048

License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer