Substantial investor demand has increased both the size and price of the initial public offering (IPO) of Aspen Insurance, a Bermuda-based reinsurer. The issue was 17.5 times over subscribed. Joint bookrunners were Credit Suisse First Boston (CSFB) and Goldman Sachs.

Institutions snapped up the 10.5 million shares, a million more than originally planned, at $22.5 each against an initial range of between $20 to $22.