---
schema_version: "secwatch.filing_event.v1"
accession: "0001297184-25-000036"
form_type: "8-K"
ticker: "AMPH"
cik: "0001297184"
company_name: "Amphastar Pharmaceuticals, Inc."
filed_at: "2025-06-04T23:59:59+00:00"
generated_at: "2026-05-19T23:41:50.069939+00:00"
event_type: "other"
sentiment: "neutral"
materiality_score: 0.25
calibrated_materiality_score: 0.25
confidence: "high"
source: SEC EDGAR
---

# Stockholders approve charter amendments for officer exculpation and forum selection removal at annual meeting

## Summary
- Elected three Class III directors: Jack Y. Zhang, Richard Prins, Diane G. Gerst (each with majority support).
- Approved charter amendment for officer exculpation under Delaware law (35.5M for, 2.9M against).
- Approved removal of forum selection provision from charter (37.4M for, 52k against).
- Ratified Ernst & Young as independent auditor for fiscal 2025 (41.5M for).
- Bylaws amended to specify Delaware Court of Chancery as exclusive forum for certain internal actions.

## SEC filing metadata
- accession: 0001297184-25-000036
- form_type: 8-K
- ticker: AMPH
- cik: 0001297184
- company_name: Amphastar Pharmaceuticals, Inc.
- filed_at: 2025-06-04T23:59:59+00:00
- event_type: other
- sentiment: neutral
- materiality_score: 0.25
- calibrated_materiality_score: 0.25
- confidence: high
- sec_items: 5.03, 5.07, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1297184/000129718425000036/0001297184-25-000036-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1297184/000129718425000036/amph-20250602x8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001297184-25-000036
- JSON: https://secwatch.observer/filing/0001297184-25-000036.json
- Plain text: https://secwatch.observer/filing/0001297184-25-000036.txt

## Key facts
- Governance Changes
  Amphastar Pharmaceuticals, Inc.: Approved amendment to Bylaws to clarify exclusive forum selection for certain legal actions (effective 2025-06-02).
  - Change: bylaw amendment
  - Effective: 2025-06-02
  source text: the board of directors of the Company approved an amendment to the amended and restated bylaws of the Company (the “Bylaws” and such amendment, the "Bylaws Amendment”) clarifying that unless the Company consents in writing to the selection of an alternative forum, the Court of Chancery of the State of Delaware (or, if the Court of Chancery does not have jurisdiction, another state court in Delaware or the United States District Court for the District of Delaware) and any appellate court therefrom will be the sole and exclusive forum
  evidence_url: https://www.sec.gov/Archives/edgar/data/1297184/000129718425000036/0001297184-25-000036-index.htm
- Governance Changes
  Amphastar Pharmaceuticals, Inc.: Approved amendment to Charter to include officer exculpation provisions under Delaware law (effective 2025-06-02).
  - Change: charter amendment
  - Effective: 2025-06-02
  source text: the stockholders of the Company voted on and approved amendments to the Company’s Amended and Restated Certificate of Incorporation (the “Charter”) (i) to reflect Delaware law provisions regarding officer exculpation (the “Exculpation Amendment”);
  evidence_url: https://www.sec.gov/Archives/edgar/data/1297184/000129718425000036/0001297184-25-000036-index.htm
- Governance Changes
  Amphastar Pharmaceuticals, Inc.: Approved amendment to Charter to remove forum selection provision (effective 2025-06-02).
  - Change: charter amendment
  - Effective: 2025-06-02
  source text: and (ii) to remove the forum selection provision (the “Forum Selection Amendment,” and together with the Exculpation Amendment, the “Charter Amendments”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/1297184/000129718425000036/0001297184-25-000036-index.htm

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