Arch Capital Group Marine and aviation — Year Five increased by 22.0% to 12.2% in Q4 2025 compared to the prior quarter. Year-over-year, this metric grew by 22.0%, from 10.0% to 12.2%.
An increase in premiums suggests sustained portfolio growth, while changes in loss development indicate shifts in long-tail liability expectations.
Represents the cumulative net premiums earned or loss development attributed to the fifth year of underwriting activity...
Standard in insurance industry loss development triangles and cohort analysis.
acgl_segment_marine_and_aviation_year_five| Q4 '21 | Q4 '22 | Q4 '23 | Q4 '24 | Q4 '25 | |
|---|---|---|---|---|---|
| Value | 7.4% | 8.4% | 10.6% | 10% | 12.2% |
| QoQ Change | — | +13.5% | +26.2% | -5.7% | +22.0% |
| YoY Change | — | +13.5% | +26.2% | -5.7% | +22.0% |