AIM is a sub-market of the London Stock Exchange

London Stock Exchange

The London Stock Exchange is a stock exchange located in the City of London within the United Kingdom. , the Exchange had a market capitalisation of US$3.7495 trillion, making it the fourth-largest stock exchange in the world by this measurement...

, allowing smaller companies to float

Initial public offering

An initial public offering or stock market launch, is the first sale of stock by a private company to the public. It can be used by either small or large companies to raise expansion capital and become publicly traded enterprises...

 shares

Stock

The capital stock of a business entity represents the original capital paid into or invested in the business by its founders. It serves as a security for the creditors of a business since it cannot be withdrawn to the detriment of the creditors...

 with a more flexible regulatory system

Financial regulation

Financial regulation is a form of regulation or supervision, which subjects financial institutions to certain requirements, restrictions and guidelines, aiming to maintain the integrity of the financial system...

 than is applicable to the main market.

AIM was launched in 1995 and has raised almost £24 billion for more than 2,200 companies. Flexibility is provided by less regulation and no requirements for capitalisation or number of shares issued. Some companies have since moved on to join the Main Market, although in the last few years, significantly more companies transferred from the Main Market to the AIM (The AIM has significant tax advantages for investors, as well as less regulatory burden for the companies themselves).