This year’s Top 50 Insurers report – available to Insurance Times subscribers here – continues to feature insurers from the UK and Gibraltar, alongside Lloyd’s syndicates, and Insurance DataLab has once again provided premium and underwriting data for each of the 50 insurance groups included.
Insurance DataLab subscribers can also access the report directly via our market intelligence platform.
Aviva maintained its place at the top of the table after reporting annual gross written premium (GWP) of £12.7 billion, significantly ahead of its nearest rivals following the acquisition of Direct Line Group.
AXA remains in second place with GWP of £7.16 billion, while Allianz holds on to third with £4.5 billion.
Although the top three remain unchanged from last year, the insurer in fourth place has climbed nine positions to re-enter the top five following its purchase of NIG and FarmWeb. That insurer is the former RSA business, now known as Intact. Completing the top five is Admiral, which has jumped two places from seventh last year.
The highest new entry in this year’s ranking is Sompo International, entering at number 24 with GWP of almost £1.25 billion, while Haven, Tesco Underwriting, and Markerstudy Group also broke in the Top 50 after a year of strong growth.
In addition to ranking the 50 largest insurance groups by GWP, the report also features the Insurance DataLab Underwriting Ratings and an in-depth analysis of the 2025 Gold Award winners across the UK, Gibraltar, and Lloyd’s markets.
Our co-founder, Matt Scott, edited this year’s supplement and provides additional insight into underwriting performance across the sector, including a more detailed analysis of commercial and personal lines performance following the introduction of the new Solvency UK reporting requirements.
“While the top of the table remains dominated by the biggest composite insurers, this year’s results underline the impact of M&A on the shape of the market with Aviva pulling even further ahead, and a resurgent Intact Insurance surging up the rankings as it returns to the Top 5,” Scott said. “It’s also been another fascinating year for UKGI from an underwriting perspective, with our data showing clear shifts in momentum as the market returned to profitability.
“At Insurance DataLab we take great pride in tracking the market through our partnership with Insurance Times and the Top 50 Insurers report and are delighted to delve once again into the intricacies of how the market is performing, and which of the main players are making waves in what is a highly competitive environment.”
Explore the full rankings
While the Insurance Times report covers the 50 biggest general insurers in the UK and Gibraltar, our market intelligence platform goes further – with detailed underwriting, solvency, and performance data on every insurer in the market, along with breakdowns by business line.
Click here to request a demo of our platform, and here if you’d like to receive a free print edition of the full report.