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Britain’s Alternative Investment Market is back in business, having just registered its most successful 12 months of trading since before the financial crisis. London’s junior stock market, the exchange of choice for many small companies floating for the first time, raised more than 2.2 billion for 76 of these businesses over the 12 months to the end of March.

That represents a dramatic recovery for Aim, which has been shrinking in size since 2007. A string of companies have left the market over that period as recession has forced them to shut up shop, while a dearth of investor confidence has prevented new joiners making their debut on the market in sufficient numbers to replace them.

So how are these new joiners performing? Well, data from Allenby Capital, a broker that specialises in advising smaller companies, suggests investors who put money into last year’s IPOs have, by and large, done pretty well. Of the 74 businesses that came to Aim during the 2013 calendar year (it’s a little early to scrutinise the performance of this year’s joiners), 57 have seen a positive share price performance since joining. The typical company is up by 47%– and while that mean average is skewed by some stellar successes, the median return is still a very healthy 27%.

So which have been the best performing Aim IPOs of 2013? Here’s 10 that have managed to at least double investors’ money. They’re British unless noted otherwise.

All Asia Asset Capital (up 567% as at 17 March)

All Asia, which operates out of Myanmar, is an investment vehicle offering exposure to a range of companies in South-East Asia – the initial focus on Malaysia, Thailand, Indonesia and Myanmar itself. Investors are excited by the prospects from these high-growth markets.

Plus 500 (354%)

One of a growing number of top technology businesses coming out of Israel, Plus 500 operates financial trading platforms and saw its profits rise by almost 200% during 2013. Its generous dividend policy has proved to be a big draw for investors.

Macromac (310%)

Macromac has lofty ambitions. It offers a range of software products and consultancy services in areas such as multimedia, mobile technologies, web design and online marketing, and promises to establish Malaysia, its home country, as “a force to be reckoned with in the global IT community”.

Quixant (210%)