Chief executive David Mercer, 42, led the buyout of this London firm from Betfair in 2012. It operates an electronic foreign exchange trading facility, with liquidity provided by 14 market-makers, including JP Morgan and Goldman Sachs. LMAX says it has 1% of the $5trillion daily FX market. Annualised revenues were £5.6m this year.

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Company details
Year2013
Rank15
CompanyLMAX Exchange
Activitye-FX trading technology
LocationWest London
Average 3 year sales growth160.27%
Latest sales £000s*†5,554
Staff95
Founded2008
Websitewww.lmax.com

If applicable:

* supplied by company † annualised figure