---
schema_version: "secwatch.filing_event.v1"
accession: "0001297184-22-000048"
form_type: "8-K"
ticker: "AMPH"
cik: "0001297184"
company_name: "Amphastar Pharmaceuticals, Inc."
filed_at: "2022-08-09T23:59:59+00:00"
generated_at: "2026-06-24T01:50:11.908281+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# Amphastar expands board to 10, appoints CFO Peters and EVP Liawatidewi as directors

## Summary
- Board size increased from 8 to 10, effective August 4, 2022.
- William J. Peters (CFO, EVP Finance, Treasurer) appointed as Class I director.
- Jacob Liawatidewi (EVP Corporate Administration & Sales/Marketing) appointed as Class I director.
- Diane G. Gerst deemed independent; now six of ten directors are independent.
- No changes to existing compensatory arrangements for the new directors.

## SEC filing metadata
- accession: 0001297184-22-000048
- form_type: 8-K
- ticker: AMPH
- cik: 0001297184
- company_name: Amphastar Pharmaceuticals, Inc.
- filed_at: 2022-08-09T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1297184/000129718422000048/0001297184-22-000048-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1297184/000129718422000048/amph-20220804x8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001297184-22-000048
- JSON: https://secwatch.observer/filing/0001297184-22-000048.json
- Plain text: https://secwatch.observer/filing/0001297184-22-000048.txt

## Key facts
- Executive change
  William J. Peters was appointed as Class I Director at Amphastar Pharmaceuticals, Inc..
  - Action: appointed
  - Role: Class I Director
  source text: appointed each of William J. Peters, the Company’s Chief Financial Officer, Executive Vice President of Finance, and Treasurer, and Jacob Liawatidewi, the Company’s Executive Vice President of Corporate Administration Center, and Sales and Marketing (together with Mr. Peters, the “New Directors”), to serve as Class I directors
  evidence_url: https://www.sec.gov/Archives/edgar/data/1297184/000129718422000048/0001297184-22-000048-index.htm
- Executive change
  Jacob Liawatidewi was appointed as Class I Director at Amphastar Pharmaceuticals, Inc..
  - Action: appointed
  - Role: Class I Director
  source text: appointed each of William J. Peters, the Company’s Chief Financial Officer, Executive Vice President of Finance, and Treasurer, and Jacob Liawatidewi, the Company’s Executive Vice President of Corporate Administration Center, and Sales and Marketing (together with Mr. Peters, the “New Directors”), to serve as Class I directors
  evidence_url: https://www.sec.gov/Archives/edgar/data/1297184/000129718422000048/0001297184-22-000048-index.htm

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