According to the latest IPO Eye report from Ernst & Young, the UK initial public offering market ranked third, after the New York Stock Exchange and NASDAQ. In addition, the market performed better this year compared to 2012. According to the report, more capital was raised so far this year than the whole year of 2012.

The success was attributed to fast-growing tech firms. This year, tech firms particularly succeeded in the Alternative Investment Market (AIM). AIM was London Stock Exchange's submarket, which had a more flexible regulatory system compared with the main IPO market.

There were 11 AIM deals so far this year amounting to a total of GBP87 million. US tech firms contributed significantly to these AIM deals.

According to David Vaughn, smaller US tech firms chose London to have a higher profile in the smaller market. In addition, Vaughn said, "It is encouraging to see a diverse range of technology companies coming to the AIM market." Vaughn was Ernst & Young's IPO leader for UK & Ireland.