Leerink Swann wins the co-lead role alongside Citigroup and Morgan Stanley after backing the company's series B last year.

Healthcare-focused investment bank Leerink Swann has won a co-lead role advising the planned up to $86.25m flotation of cancer treatment company Tesaro, after the bank backed the company last year.

Other advisers on the initial public offering are banks Citigroup, Morgan Stanley, the two of which are also co-leads, as well as BMO Capital Markets and Baird, according to Tesaro’s filing with the Securities and Exchange Commission on Friday. 

Other shareholders include Frost Gamma Investments, an…