Shearman & Sterling and Canadian firm McCarthy Tetrault are advising Fairfax Financial on its $4.7bn (£2.9bn) offer for struggling smartphone maker BlackBerry.

Fairfax, BlackBerry’s largest shareholder with a stake of approximately 10%, is offering $9 a share in cash to acquire the remaining shares in the firm, which is being advised by Skadden Arps Slate Meagher & Flom and Canada’s Torys.