Products & Services · Year One
Third party occurrence business — Year One
Arch Capital Group Third party occurrence business — Year One increased by 2.8% to 3.7% in Q4 2025 compared to the prior quarter. Year-over-year, this metric grew by 2.8%, from 3.6% to 3.7%. This increase may warrant attention — for this metric, lower values are generally preferred.
Analysis
StatementSegment
CategoryEfficiency
SignalLower is better
VolatilityModerate
First reportedQ4 2018
Last reportedQ4 2025
How to read this metric
Higher values in year one may indicate a faster-than-expected reporting pattern or higher initial claim frequency.
Detailed definition
This metric represents the loss development or claim activity specifically observed during the first year following the...
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_oneHistorical Data
5 periods
| Q4 '21 | Q4 '22 | Q4 '23 | Q4 '24 | Q4 '25 | |
|---|---|---|---|---|---|
| Value | 3.3% | 3.4% | 3.5% | 3.6% | 3.7% |
| QoQ Change | — | +3.0% | +2.9% | +2.9% | +2.8% |
| YoY Change | — | +3.0% | +2.9% | +2.9% | +2.8% |
Range3.3% – 3.7%
CAGR+12.1%
Avg YoY Growth+2.9%
Median YoY Growth+2.9%
Current Streak4+ quarters growth
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Frequently Asked Questions
- What is Arch Capital Group's third party occurrence business — year one?
- Arch Capital Group (ACGL) reported third party occurrence business — year one of 3.7% in Q4 2025.
- How has Arch Capital Group's third party occurrence business — year one changed year-over-year?
- Arch Capital Group's third party occurrence business — year one increased by 2.8% year-over-year, from 3.6% to 3.7%.
- What does third party occurrence business — year one mean?
- The loss activity observed during the first year of an underwriting period.