Lloyd's of London grew gross premiums 4.2% in 2025, but the headline masks a widening fault line in casualty, where underwriting losses and reserve concerns are testing the market's discipline, a syndicate-level analysis from Howden Re shows.
The reinsurance broker's report found property and reinsurance lines carried the gains while casualty posted an overall loss, with the accident year ratio reaching 98.6%.
Total stamp capacity hit $65.3 billion, up 4.3% and 67% higher than six years ago, driven by large syndicates and new entrants including Fidelis and Oak. Howden Re's figures suggest the growth was volume-led, with new capacity expanding 10.3% even as prices fell 3.7%.
The stress is not new. Lloyd's own underwriting directorate warned in late 2025 that casualty rates appeared inadequate and the tail remained long.
AM Best reinforced the concern in January, reporting that US casualty reserves across the Lloyd's market showed signs of deficiency, driven by social inflation and third-party litigation funding. Several syndicates had posted prior-year adverse development in general liability and professional lines.
Beazley led casualty writers at £779 million in GWP, though its five-year premium CAGR was negative 14%, a figure likely reflecting deliberate pullback as conditions deteriorated.
The market's reserve margin widened to £6.62 billion from £5.41 billion in 2024. Fitch and KBRA have both characterized the positioning as prudent.
But the composition tells a more nuanced story: favorable development in property was partially offset by strengthening in aviation and casualty, meaning the wider margin reflects caution on long-tail exposure rather than comfort across the board.
Property underwriting profit rose 43%, with Tokio Marine Combined leading writers at £1.05 billion in GWP. Reinsurance results climbed 22% on 7% premium growth, with Ariel Re topping the table at £1.18 billion.
The absence of major US hurricanes in the second half of 2025, after the January California wildfires, allowed several syndicates to outperform catastrophe budgets.
Lloyd's in March launched a 2026-30 strategy that steps back from Blueprint Two, the delayed digital transformation program introduced in 2020. Rather than mandating a centralized platform, the market will pursue an open architecture model, setting common data standards while letting participants adopt interoperable technology at their own pace.
Its Velonetic processing platform, a joint venture with DXC Technology and the International Underwriting Association, will be refocused on incremental upgrades.
The Howden Re report drew on data from NOVA, Lloyd's annual reports and individual syndicate accounts.
