---
schema_version: "secwatch.filing_event.v1"
accession: "0000947484-25-000076"
form_type: "8-K"
ticker: "ACGL"
cik: "0000947484"
company_name: "ARCH CAPITAL GROUP LTD."
filed_at: "2025-10-27T23:59:59+00:00"
generated_at: "2026-05-17T02:17:56.948511+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.85
calibrated_materiality_score: 0.85
confidence: "high"
source: SEC EDGAR
---

# Arch Capital Q3 net income $1.3B ($3.56 EPS) vs $1.0B a year ago; book value up 5.3%

## Summary
- Net income available to common shareholders $1.3B, $3.56 diluted EPS, vs $1.0B, $2.56 in Q3 2024.
- After-tax operating income $1.0B ($2.77/share) vs $762M ($1.99); operating ROE 18.5%.
- Combined ratio improved to 79.8% from 86.6% YoY; ex-cat and prior year dev 80.5% vs 78.3%.
- Pre-tax catastrophe losses of $72M; favorable prior year reserve development of $103M.
- Share repurchases of ~$732M during quarter; book value per share $62.32 (+5.3% from Q2).

## SEC filing metadata
- accession: 0000947484-25-000076
- form_type: 8-K
- ticker: ACGL
- cik: 0000947484
- company_name: ARCH CAPITAL GROUP LTD.
- filed_at: 2025-10-27T23:59:59+00:00
- event_type: earnings
- sentiment: positive
- materiality_score: 0.85
- calibrated_materiality_score: 0.85
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/947484/000094748425000076/0000947484-25-000076-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/947484/000094748425000076/acgl-20251027.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000947484-25-000076
- JSON: https://secwatch.observer/filing/0000947484-25-000076.json
- Plain text: https://secwatch.observer/filing/0000947484-25-000076.txt

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