Alternative Investment Market

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Alternative Investment Market (AIM) Logo.png
Type Stock exchange
Location London, United Kingdom
Founded 19 June 1995
Owner London Stock Exchange Group
Key people Marcus Stuttard Head of AIM[1]
Currency GBP, US$
No. of listings 1,254[2]
Website AIM homepage on London Stock Exchange website

AIM (formerly the Alternative Investment Market) is a sub-market of the London Stock Exchange that was launched on 19 June 1995. It allows smaller, less-viable companies to float shares with a more flexible regulatory system than is applicable to the main market.

At launch, AIM comprised only 10 companies valued collectively at £82.2 million. By 2017, over one thousand companies comprise the sub-market, with an average market cap of £80 million per listing.[3] AIM has also started to become an international exchange, often due to its low regulatory burden, especially in relation to the U.S. Sarbanes–Oxley Act (though only a quarter of AIM-listed companies would qualify to list on a U.S. stock exchange even prior to passage of the Sarbanes–Oxley Act).[4] As of December 2005 over 270 foreign companies had been admitted to the AIM.

The FTSE Group maintains three indices for measuring the AIM, which are the FTSE AIM UK 50 Index, FTSE AIM 100 Index, and FTSE AIM All-Share Index.

Regulatory model[edit]

AIM is an exchange regulated venue featuring an array of principles-based rules for publicly held companies. AIM's regulatory model is based on a comply-or-explain option that lets companies that are floated on AIM either comply with AIM's relatively few rules, or explain why it has decided not to comply with them.

Nominated Advisers (Nomads)[edit]

Aside from granting leeway in regard to regulatory compliance, the Exchange also mandates continuous oversight and advice by the issuer's underwriter, referred to as a Nominated Adviser (Nomad). The role of Nomads is central to AIM’s regulatory model, as these entities play the role of gatekeepers, advisers and regulators of AIM companies. In advising each firm as to which rules should be complied with and the manner in which existing requirements should be met, Nomads provide the essential service of allowing firms to abide by tailor-made regulation, reducing regulatory costs in the process. Theoretically, Nomads are liable for damages from tolerating misdemeanors on behalf of their supervised companies, including the loss of reputational capital. However, this heavy reliance on Nomads has been criticised as creating a conflict of interest, since Nomads receive fees from the companies they purportedly supervise while, in practice, managing to avoid liability for market misconduct.

In 2006, the London Stock Exchange launched a review of Nomad activities, resulting in a regulatory "handbook" for Nomads published by the Financial Services Authority in 2007.[5][6]


Because AIM is an unregulated market segment, it escapes most of the mandatory provisions contained in European Union directives – as implemented in the UK – and other rules applicable to companies listed in the LSE. AIM believes self-regulation is pivotal to AIM’s low regulatory burden: companies seeking an AIM listing are not subject to significant admission requirements; after admission is granted, firms must comply with ongoing obligations which are comparatively lower to the ones that govern the operation of larger exchanges; and certain corporate governance provisions are not mandatory for AIM companies. Therefore, AIM-listed companies are often subject to manipulation by institutional investors. AIM-listed companies usually are only required to adhere to the corporate governance requirements of their home jurisdiction, which, as a practical matter, vary widely.[6]

However, the regulatory requirements are more onerous than for private companies and AIM listed plcs are required to prepare audited annual accounts under IFRS.[7]

Investor base[edit]

Another important element of AIM’s model is the composition of its investor base. Although AIM-listed companies are not start-ups, most are small and potentially more risky than a FTSE listing. This may prove to be hazardous for unsophisticated investors who lack both the knowledge and resources to conduct proper inquiries into a firm’s prospects and activities, or even larger investors which lack strong internal control and risk management requirements. As a consequence, AIM’s investor base is largely composed of institutional investors and wealthy individuals.[6]

Market capitalisation[edit]

The following table lists the 10 biggest AIM companies on 8 November 2017.[8]

Rank Company Market cap (£M GBP)
1 4,931
2 Hutchison China Meditech 3,014
3 Burford Capital 2,466
4 Fevertree Drinks 2,354
5 2,316
6 Abcam 2,087
7 Clinigen Group 1,336
8 Breedon Group 1,264
9 RWS Holdings 1,210
10 Plus500 1,138


"Casino" environment[edit]

In March 2007, U.S. securities regulator Roel Campos suggested that AIM's rules for share trading have created a market like a "casino". Campos reportedly said: "I'm concerned that 30% of issuers that list on AIM are gone in a year. That feels like a casino to me and I believe that investors will treat it as such."[9] The comment resulted in several angry retorts, including one from the London Stock Exchange, which controls AIM, pointing out that the number of companies that go into liquidation or administration in a year is actually fewer than 2%.[9]

AIM has since issued new rules requiring that listed companies maintain a website.[10]

The calibre of participants in the market has also been criticised by fund manager John Hempton of Bronte Capital Management.[11]

Langbar International fraud[edit]

AIM was criticised for allowing Langbar International to be listed.[12] This £375 million ($750m) share fraud was investigated by the Serious Fraud Office[13][14][15] and the City of London Police when it was discovered in November 2005 that Langbar had none of the assets it declared at listing. This was due in part because the Nomad (Nominated Adviser) failed to carry out due diligence. Also, the Exchange did not ensure that the AIM rules had been complied with. The AIM changed the rules for Nomads in 2006.[16][17][18] On 19 October 2007 they fined Nabarro Wells £250,000 ($512,500)[19] and publicly censured them for breaches of the AIM rules.[20][21][22]


In March 2007 the Daily Telegraph noticed a tendency to use listing vehicles incorporated in offshore financial centres prior to floating on AIM. Some 35% of the companies floated on AIM during 2006 were from OFCs, of which the majority came from the Channel Islands or the British Virgin Islands.[23]

On 29 January 2009 it was announced that AIM is to form the basis of an Asian-orientated growth or incubator market called 'Tokyo AIM', which will be run as a joint venture between the Tokyo Stock Exchange and LSE. Tokyo AIM will replicate AIM's system of oversight by NOMADs, with 'J-Nomads' being "selected and approved by TOKYO AIM ... to assess companies’ suitability for the market".[24]

See also[edit]


  1. ^ LSE AIM Contact page 1 August 2009 Archived 20 June 2009 at the Wayback Machine.
  2. ^ "AIM Statistics April 2010" (PDF). London Stock Exchange. April 2010. 
  3. ^ Andrew Hore (27 January 2017). "How AIM came of age". Interactive Investor. Retrieved 28 January 2017. 
  4. ^ "Doidge, Karolyi and Stulz "Has New York Become Less Competitive in Global Markets? Evaluating Foreign Listing Choices over Time"". 25 April 2007. SSRN 982193Freely accessible. 
  5. ^ Warwick-Ching, Lucy (29 December 2007). "Advisers walk away from smallest fry". Financial Times. 
  6. ^ a b c Mendoza, Jose Miguel (October 2007). "Securities regulation in low-tier listing venues: The rise of the Alternative Investment Market". Fordham Journal of Corporate & Financial Law (abstract). New York. XIII (1). SSRN 1004548Freely accessible. 
  7. ^ "Rule 19 of AIM Rules for Companies (2010)" (PDF). London Stock Exchange. London Stock Exchange. Retrieved 15 August 2013. 
  8. ^
  9. ^ a b Jill Treanor (9 March 2007). "Treanor, Jill "City hits out over US 'casino' jibe at Aim" The Guardian 10 March 2007". London: Retrieved 20 November 2011. 
  10. ^ "LSE AIM Rule 26". Retrieved 20 November 2011. 
  11. ^ Frost, James (November 2016). "The iconoclast". SmartInvestor. The Australian Financial Review. p. 9. And then there are certain places with a preponderance of bad people. Stockbrokers from Long Island, mining promotors in Perth or Vancouver, anything on the AIM boards in the UK. 
  12. ^ "Has the Langbar scandal damaged AIM's healthy reputation?". The Lawyer. 24 September 2007. Retrieved 20 November 2011. 
  13. ^ "Serious Fraud Office Press Releases 29 November 2005". Archived from the original on 29 September 2011. Retrieved 20 November 2011. 
  14. ^ Simon Bowers (25 November 2005). "Fraud inquiry starts into shell firm's missing millions". The Guardian. UK. Retrieved 20 November 2011. 
  15. ^ Published on Tue 29 Nov 09:51:14 GMT 2005 (29 November 2005). "Langbar: The SFO are called in". Yorkshire Post. Retrieved 20 November 2011. 
  16. ^ "Sharewatch: LSE takes AIM". The Sunday Times, 2 July 2006
  17. ^ "Inside the City: Rogue nomads in the firing line" The Sunday Times, 2 July 2006
  18. ^ Essen, Yvette (3 October 2006). "LSE takes aim at nomads to quell concerns". The Daily Telegraph. UK. Retrieved 20 November 2011. 
  19. ^ "Historic Currency Conversion". 19 October 2007. Retrieved 20 November 2011. 
  20. ^ ""Nomad strayed from market rules" Financial Times 19 October 2007". Financial Times. 19 October 2007. Retrieved 20 November 2011. 
  21. ^ Robert Lea (29 October 2007). "Nabarro Wells censured by LSE over listing". Evening Standard. London. Retrieved 20 November 2011. 
  22. ^ LSE hits Nabarro Wells with £250,000 fine over AIM checks" The Times 20 October 2007
  23. ^ Essen, Yvette (12 March 2007). "Aim market: Offshore attractions for the 'sophisticated' investor". The Daily Telegraph. UK. Retrieved 20 November 2011. 
  24. ^ "Tokyo Stock Exchange and London Stock Exchange publish rulebook for public comment; name new growth market "TOKYO AIM"". London Stock Exchange. 29 January 2009. Retrieved 20 November 2011. 

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