The AIM attracted 46 companies raising a total of £472m during the first quarter.
This is compared to the FTSE 100 which drew in 13 companies worth a combined £889m during this period.
AIM's advantage is that it does not make the same stringent requirements on companies as does the FTSE 100. On that index, a lengthy trading history and having to transfer a certain percentage of shares to public hands are required.
KPMG numbers show that with the changes to the CGT made in last month's budget, investment in listings such as AIM will become even more attractive due to the generous tax breaks they generate.