E-commerce company Rokt has agreed a secondary share sale with investors including Tiger Global Management at a $3.5 billion valuation, ahead of plans to go public next year. Tiger Global, Square Peg Capital, Barrenjoey and SecondQuarter Ventures are among those that will buy $335 million in shares from some existing investors in New York-based Rokt. Board members including John Ho, Terry Bowen and Karen Katz are also buying shares, according to a statement on Thursday....