Hyperion is planning a minority stake sale and has hired Morgan Stanley to advise on the matter according to reports.
An article on Reuters stated that the broker is hoping to sell around 25% of the business to a sovereign wealth fund or long term investor.
Hyperion is the owner of brokers RK Harrison, Howden and underwriter Dual.
Hyperion reported a 45% increase in revenue for the financial year ended 30 September 2016 to £434m.
However it made a loss of £38m due to the RK Harrison