Products & Services · Prior years
Casualty — Prior years
Arch Capital Group Casualty — Prior years decreased by 9.1% to $20.00M in Q1 2026 compared to the prior quarter. Year-over-year, this metric grew by 150.0%, from $8.00M to $20.00M. This is a positive signal — lower values indicate better performance for this metric.
Analysis
StatementSegment
CategoryRisk
SignalLower is better
VolatilityModerate
First reportedQ1 2016
Last reportedQ1 2026
How to read this metric
An increase indicates unfavorable reserve development, suggesting prior estimates were too low, while a decrease indicates favorable development.
Detailed definition
Represents the net favorable or unfavorable development of loss reserves established in previous underwriting years for...
Peer comparison
Commonly reported by insurers as 'prior year reserve development' or 'prior accident year development'.
Metric ID:
acgl_segment_casualty_prior_yearsHistorical Data
15 periods
| Q2 '21 | Q3 '21 | Q1 '22 | Q3 '22 | Q1 '23 | Q2 '23 | Q3 '23 | Q4 '23 | Q1 '24 | Q2 '24 | Q3 '24 | Q4 '24 | Q1 '25 | Q3 '25 | Q1 '26 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Value | $34.20M | -$4.70M | $5.80M | $21.80M | -$3.00M | $22.00M | $21.00M | $6.00M | $2.00M | $14.00M | $27.00M | $1.00M | $8.00M | $22.00M | $20.00M |
| QoQ Change | — | -113.7% | +223.4% | +275.9% | -113.8% | +833.3% | -4.5% | -71.4% | -66.7% | +600.0% | +92.9% | -96.3% | +700.0% | +175.0% | -9.1% |
| YoY Change | — | — | — | +563.8% | -151.7% | — | -3.7% | — | +166.7% | -36.4% | +28.6% | -83.3% | +300.0% | -18.5% | +150.0% |
Range-$4.70M – $34.20M
CAGR-14.2%
Avg YoY Growth+91.5%
Median YoY Growth+12.5%
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Frequently Asked Questions
- What is Arch Capital Group's casualty — prior years?
- Arch Capital Group (ACGL) reported casualty — prior years of $20.00M in Q1 2026.
- How has Arch Capital Group's casualty — prior years changed year-over-year?
- Arch Capital Group's casualty — prior years increased by 150.0% year-over-year, from $8.00M to $20.00M.
- What does casualty — prior years mean?
- The change in estimated costs for claims from previous years.