Three out of the top five best performing initial public offerings in the US so far this year are technology firms, despite the crash in the number of firms from the sector entering the new issues market.

Simplex Solutions, a US software firm, has gained 112.5% since its IPO. Credit Suisse First Boston led the $48m (€53.6m) offer which is the second best performing IPO of the year, according to data from the website ipo.com, which provides analysis of early-stage capital market investing.