---
schema_version: "secwatch.filing_event.v1"
accession: "0000947484-23-000106"
form_type: "8-K"
ticker: "ACGL"
cik: "0000947484"
company_name: "ARCH CAPITAL GROUP LTD."
filed_at: "2023-11-13T23:59:59+00:00"
generated_at: "2026-06-08T05:59:25.948639+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Arch MI to acquire RMIC run-off mortgage insurance from Old Republic; adds $1B risk in force

## Summary
- Arch U.S. MI Holdings to acquire RMIC from Old Republic; expected close H1 2024 subject to regulatory approval.
- RMIC's $1 billion risk-in-force portfolio will be integrated into Arch MI's $75.9B portfolio as of Sept. 30, 2023.
- Arch CEO cites significant expense and capital synergies; describes deal as 'attractive financial transaction'.
- Jefferies served as Arch's financial advisor; Eversheds Sutherland as legal advisor.

## SEC filing metadata
- accession: 0000947484-23-000106
- form_type: 8-K
- ticker: ACGL
- cik: 0000947484
- company_name: ARCH CAPITAL GROUP LTD.
- filed_at: 2023-11-13T23:59:59+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/947484/000094748423000106/0000947484-23-000106-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/947484/000094748423000106/acgl-20231113.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000947484-23-000106
- JSON: https://secwatch.observer/filing/0000947484-23-000106.json
- Plain text: https://secwatch.observer/filing/0000947484-23-000106.txt

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