---
schema_version: "secwatch.filing_event.v1"
accession: "0000947484-24-000130"
form_type: "8-K"
ticker: "ACGL"
cik: "0000947484"
company_name: "ARCH CAPITAL GROUP LTD."
filed_at: "2024-10-30T23:59:59+00:00"
generated_at: "2026-05-30T08:49:50.287987+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.8
calibrated_materiality_score: 0.8
confidence: "high"
source: SEC EDGAR
---

# Arch Capital Q3 net income $978M ($2.56 EPS), up 37% YoY; underwriting income down 25% on cat losses

## Summary
- Net income available to common shareholders: $978M ($2.56 diluted EPS) vs $713M ($1.88) in Q3 2023.
- After-tax operating income $762M ($1.99/share); annualized operating return on average common equity 14.8%.
- Pre-tax catastrophe losses $450M from Hurricane Helene and global events; combined ratio 86.6% (78.3% ex-cat and prior-year dev).
- Gross premiums written $5.44B (+20.2% YoY); underwriting income $538M (down 25.4%).
- Book value per share $57.00, up 8.1% from June 30, 2024.

## SEC filing metadata
- accession: 0000947484-24-000130
- form_type: 8-K
- ticker: ACGL
- cik: 0000947484
- company_name: ARCH CAPITAL GROUP LTD.
- filed_at: 2024-10-30T23:59:59+00:00
- event_type: earnings
- sentiment: positive
- materiality_score: 0.8
- calibrated_materiality_score: 0.8
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/947484/000094748424000130/0000947484-24-000130-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/947484/000094748424000130/acgl-20241030.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000947484-24-000130
- JSON: https://secwatch.observer/filing/0000947484-24-000130.json
- Plain text: https://secwatch.observer/filing/0000947484-24-000130.txt

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