---
schema_version: "secwatch.filing_event.v1"
accession: "0000947484-24-000099"
form_type: "8-K"
ticker: "ACGL"
cik: "0000947484"
company_name: "ARCH CAPITAL GROUP LTD."
filed_at: "2024-08-01T23:59:59+00:00"
generated_at: "2026-05-31T14:12:28.297727+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# Arch Capital completes $450M acquisition of Allianz's U.S. MidCorp and Entertainment insurance businesses

## Summary
- Base purchase price $450M, plus assumed liabilities; closed August 1, 2024.
- Nearly 500 former Allianz MidCorp and Entertainment employees join Arch.
- Mark Lange appointed Chief Middle Market Executive to lead new units.
- Deal originally announced April 5, 2024; amendment filed for clarifying changes.
- Expands Arch Insurance's middle-market platform and offerings.

## SEC filing metadata
- accession: 0000947484-24-000099
- form_type: 8-K
- ticker: ACGL
- cik: 0000947484
- company_name: ARCH CAPITAL GROUP LTD.
- filed_at: 2024-08-01T23:59:59+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 1.01, 2.01, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/947484/000094748424000099/0000947484-24-000099-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/947484/000094748424000099/acgl-20240801.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000947484-24-000099
- JSON: https://secwatch.observer/filing/0000947484-24-000099.json
- Plain text: https://secwatch.observer/filing/0000947484-24-000099.txt

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