Weil, Gotshal & Manges and Kirkland & Ellis are advising SoftBank Group Corp. on a $3.3 billion acquisition of New York-based Fortress Investment Group.

Tokyo-based SoftBank has agreed to buy the New York Stock Exchange-listed alternative investment firm for $8.08 apiece. Fortress will retain its brand and operate independently within SoftBank once the deal completes in the second half of this year. Fortress principals Peter Briger, Wesley Edens and Randal Nardone will stay and lead the firm.