---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-26-082772"
form_type: "8-K"
ticker: "AMPH"
cik: "0001297184"
company_name: "Amphastar Pharmaceuticals, Inc."
filed_at: "2026-07-13T10:01:01+00:00"
generated_at: "2026-07-13T10:05:28.979916+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.25
calibrated_materiality_score: 0.25
confidence: "high"
source: SEC EDGAR
---

# Amphastar appoints Anthony Pierce to board, expands to 11 directors

## Summary
- Board increased from 10 to 11 directors; Anthony Pierce appointed as Class III director effective July 9, 2026.
- Pierce is independent under Nasdaq standards; no committee assignments at this time.
- Annual cash retainer of $55,000 (pro-rated); initial equity grant of $300,000 (50% RSUs, 50% options) vests on first anniversary.
- Standard indemnification agreement to be entered with Pierce; no reportable transactions under Item 404(a).

## SEC filing metadata
- accession: 0001104659-26-082772
- form_type: 8-K
- ticker: AMPH
- cik: 0001297184
- company_name: Amphastar Pharmaceuticals, Inc.
- filed_at: 2026-07-13T10:01:01+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.25
- calibrated_materiality_score: 0.25
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1297184/000110465926082772/0001104659-26-082772-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1297184/000110465926082772/amph-20260709x8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-26-082772
- JSON: https://secwatch.observer/filing/0001104659-26-082772.json
- Plain text: https://secwatch.observer/filing/0001104659-26-082772.txt

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