Geoffrey Wilkinson, a US-based business angel, is set to make a killing when Sportingbet.com, the online sports betting service, launches its listing on the UK's Alternative Investment Market later this month.

Based on the 177p (€2.81) per-share value of Sportingbet.com shares when they were suspended on November 9 on Ofex, the unregulated UK stock market, Wilkinson will see his initial seed capital of £100,000 transformed into £43m. This is a return of 429 times on his original investment.