Products & Services · Year Four
Third party occurrence business — Year Four
Arch Capital Group Third party occurrence business — Year Four increased by 1.5% to 13.4% in Q4 2025 compared to the prior quarter. Year-over-year, this metric grew by 1.5%, from 13.2% to 13.4%. This increase may warrant attention — for this metric, lower values are generally preferred.
Analysis
StatementSegment
CategoryEfficiency
SignalLower is better
VolatilityStable
First reportedQ4 2018
Last reportedQ4 2025
How to read this metric
Significant activity in year four may indicate long-tail claim development or unexpected severity in older policies.
Detailed definition
This metric measures the loss development or claim activity observed during the fourth year following the inception of t...
Peer comparison
Standard actuarial development triangle component used to analyze claim reporting patterns across the industry.
Metric ID:
acgl_segment_third_party_occurrence_business_year_fourHistorical Data
5 periods
| Q4 '21 | Q4 '22 | Q4 '23 | Q4 '24 | Q4 '25 | |
|---|---|---|---|---|---|
| Value | 11% | 11.2% | 11.4% | 13.2% | 13.4% |
| QoQ Change | — | +1.8% | +1.8% | +15.8% | +1.5% |
| YoY Change | — | +1.8% | +1.8% | +15.8% | +1.5% |
Range11% – 13.4%
CAGR+21.8%
Avg YoY Growth+5.2%
Median YoY Growth+1.8%
Current Streak4+ quarters growth
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Frequently Asked Questions
- What is Arch Capital Group's third party occurrence business — year four?
- Arch Capital Group (ACGL) reported third party occurrence business — year four of 13.4% in Q4 2025.
- How has Arch Capital Group's third party occurrence business — year four changed year-over-year?
- Arch Capital Group's third party occurrence business — year four increased by 1.5% year-over-year, from 13.2% to 13.4%.
- What does third party occurrence business — year four mean?
- The loss activity observed during the fourth year of an underwriting period.