FD is advising the firm in what will be one of the year's largest initial public offerings. Hargreaves Lansdown is the largest independent firm of its kind in the UK.
Just 25 per cent of company shares will be sold in the IPO, with all employees committed to not sell any shares before the company's annual results in summer 2008.
The deal has caught the eyes of Bristol City FC fans - Hargreaves Lansdown co-founder Stephen Landsdown is also the club's chairman. He denied that he will give the club funds from his expected £250m windfall.