---
schema_version: "secwatch.filing_event.v1"
accession: "0001297184-21-000054"
form_type: "8-K"
ticker: "AMPH"
cik: "0001297184"
company_name: "Amphastar Pharmaceuticals, Inc."
filed_at: "2021-08-20T23:59:59+00:00"
generated_at: "2026-06-29T08:35:36.802158+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Amphastar to acquire remaining ~15% of Nanjing subsidiary for $22.5M cash

## Summary
- Signed SPA for ~15% stake in Amphastar Nanjing Pharmaceuticals (ANP) from QQ for ~$22.5M.
- Deal subject to regulatory approval; after closing, Amphastar will own 100% of ANP.
- QQ is controlled by COO/Chairman Mary Luo, CEO Jack Zhang, and family members.
- Proceeds: APCL $18.96M, Bill Zhang $3.37M, Chongqing Zhang $0.21M.
- Transaction price based on independent valuation and deemed fair by disinterested directors.

## SEC filing metadata
- accession: 0001297184-21-000054
- form_type: 8-K
- ticker: AMPH
- cik: 0001297184
- company_name: Amphastar Pharmaceuticals, Inc.
- filed_at: 2021-08-20T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 1.01, 2.01, 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1297184/000129718421000054/0001297184-21-000054-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1297184/000129718421000054/amph-20210819x8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001297184-21-000054
- JSON: https://secwatch.observer/filing/0001297184-21-000054.json
- Plain text: https://secwatch.observer/filing/0001297184-21-000054.txt

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