Abuse of side pockets in the financial crisis - when hedge funds locked in investors to avoid having to sell off discounted assets - has made the practice less palatable in the wider financial markets.
Aspen increased the amount of third party capital it has under management to $550mn at this year's renewals, up 20 percent from the same period in 2017.
The 2017 calendar year was the costliest on record for weather events, with insured losses estimated at $132bn, according to Aon Benfield's Impact Forecasting.
