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The FTSE AIM UK 50 Index was introduced on 16 May 2005, and is a market-capitalisation-weighted stock market index. The index incorporates the largest 50 UK companies (by capitalisation) which have their primary listing on the
Alternative Investment Market AIM (formerly the Alternative Investment Market) is a sub-market of the London Stock Exchange that was launched on 19 June 1995 as a replacement to the previous Unlisted Securities Market (USM) that had been in operation since 1980. It allows ...
(AIM). It includes UK domiciled companies only. The index is reviewed quarterly, and the constituent companies may change based on market capitalisation data as at the end of February, May, August and November. The index is maintained by
FTSE Russell FTSE Russell is a subsidiary of London Stock Exchange Group (LSEG) that produces, maintains, licenses, and markets stock market indices. The division is notable for FTSE 100 Index, Russell 2000 Index, among other indices. The brand and divisio ...
, a subsidiary of the
London Stock Exchange Group London Stock Exchange Group plc (LSEG) is a United Kingdom-based stock exchange and financial information company headquartered in the City of London, England. It owns the London Stock Exchange (on which it is also listed), Refinitiv, LSEG T ...
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See also

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FTSE 100 The Financial Times Stock Exchange 100 Index, also called the FTSE 100 Index, FTSE 100, FTSE, or, informally, the "Footsie" , is a share index of the 100 companies listed on the London Stock Exchange with (in principle) the highest marke ...
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FTSE 250 The FTSE 250 Index ( "Footsie") is a capitalisation-weighted index consisting of the 101st to the 350th largest companies listed on the London Stock Exchange. Promotions and demotions to and from the index occur quarterly in March, June, Septem ...
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FTSE AIM 100 Index The FTSE AIM UK 100 Index was introduced on 16 May 2005, and is a market-capitalisation-weighted stock market index. The index incorporates the largest 100 companies (by capitalisation) which have their primary listing on the Alternative Investmen ...


References

British stock market indices FTSE Group stock market indices {{Stockexchange-stub