---
schema_version: "secwatch.filing_event.v1"
accession: "0001899287-25-000020"
form_type: "8-K"
ticker: "AMPX"
cik: "0001899287"
company_name: "Amprius Technologies, Inc."
filed_at: "2025-04-23T23:59:59+00:00"
generated_at: "2026-05-23T08:24:57.303486+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# Amprius appoints Tom Stepien as President, effective May 1, 2025

## Summary
- Tom Stepien, 64, appointed President and elected as Class I director; CEO Kang Sun remains.
- Stepien receives $475,000 base salary, 70% target bonus, and 400,000 RSUs vesting over four years.
- He previously led South 8 Technologies and held VP roles at Applied Materials.
- Severance provides six months' base salary if terminated without cause or for good reason.

## SEC filing metadata
- accession: 0001899287-25-000020
- form_type: 8-K
- ticker: AMPX
- cik: 0001899287
- company_name: Amprius Technologies, Inc.
- filed_at: 2025-04-23T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1899287/000189928725000020/0001899287-25-000020-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1899287/000189928725000020/ampx-20250422.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001899287-25-000020
- JSON: https://secwatch.observer/filing/0001899287-25-000020.json
- Plain text: https://secwatch.observer/filing/0001899287-25-000020.txt

## Key facts
- Executive change
  Tom Stepien was elected as Class I Director at Amprius Technologies, Inc..
  - Action: elected
  - Role: Class I Director
  source text: On April 22, 2025, the board of directors of the Company (the "Board") also elected Mr. Stepien to serve as a Class I director, effective May 1, 2025.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1899287/000189928725000020/0001899287-25-000020-index.htm
- Executive change
  Tom Stepien was appointed as President at Amprius Technologies, Inc..
  - Action: appointed
  - Role: President
  source text: On April 23, 2025, Amprius Technologies, Inc. (the "Company") announced that Mr. Tom Stepien, had been appointed President of the Company.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1899287/000189928725000020/0001899287-25-000020-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.