---
schema_version: "secwatch.filing_event.v1"
accession: "0000947484-25-000041"
form_type: "8-K"
ticker: "ACGL"
cik: "0000947484"
company_name: "ARCH CAPITAL GROUP LTD."
filed_at: "2025-04-29T23:59:59+00:00"
generated_at: "2026-05-23T04:36:08.991018+00:00"
event_type: "earnings"
sentiment: "negative"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Arch Capital Q1 net income falls to $564M from $1.1B on $547M catastrophe losses

## Summary
- Net income available to common shareholders $564M ($1.48/sh) vs $1.1B ($2.92/sh) in Q1 2024.
- After-tax operating income $587M ($1.54/sh), down from $933M ($2.45/sh) YoY.
- Pre-tax catastrophe losses of $547M, primarily from California wildfires; combined ratio 90.1% (vs 78.8%).
- Gross premiums written up 8.9% to $6.5B; book value per share $55.15, +3.8% sequentially.
- Share repurchases of ~$196M in Q1; CEO cites more competitive market but expects to stand out.

## SEC filing metadata
- accession: 0000947484-25-000041
- form_type: 8-K
- ticker: ACGL
- cik: 0000947484
- company_name: ARCH CAPITAL GROUP LTD.
- filed_at: 2025-04-29T23:59:59+00:00
- event_type: earnings
- sentiment: negative
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/947484/000094748425000041/0000947484-25-000041-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/947484/000094748425000041/acgl-20250429.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000947484-25-000041
- JSON: https://secwatch.observer/filing/0000947484-25-000041.json
- Plain text: https://secwatch.observer/filing/0000947484-25-000041.txt

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