Beijing-based Haiwen & Partners has scored a key advisory role in Guotai Junan Securities $4.85 billion Shanghai IPO, the nation’s biggest domestic share sale since 2010.

Shanghai-headquartered Guotai Junan, China’s largest brokerage by revenue and third largest by profit, has followed in the footsepts of other Chinese brokerages tapping into the country’s capital markets to fund their booming margin-trading business.

Guotai Junan’s IPO is the fourth in the mainland market to raise more than $1 billion in the past 12 month following Guosen Securities, Orient Securities  and China National Nuclear Power Corp’s IPO in May.

A Haiwen team led by partners Yang Jingfang, Li Liping and Mu Jian is acting for the Guotai Junan.

China Galaxy Securities Co Ltd, Huarong Securities Co Ltd, Huatai Securities, Southwest Securities and Ping An Securities Ltd will underwrite the IPO, according to the prospectus.