TAM Asset Management may be a relatively small business, but chief executive Lester Petch has big ambitions and believes the firm is on the verge of a 'quantum leap’. Since launch in 2005, TAM has quietly grown its assets under management to £250 million by purely focusing on building strategic relationships with professional intermediaries. The firm’s core range of tailored risk-rated portfolios was supplemented by ethical and Sharia-compliant versions last year to provide a wider choice for clients. However, it is the opportunities offered by overseas expansion that could prove the real game-changer, according to Petch.