GSK to acquire US biotech group for $2.2bn Business FTSE 100 giant GSK has reached an agreement to acquire US based biotech group Rapt Therapeutics. The deal values the company, which develops therapies for treating people with inflammatory and immunologic diseases, at $2.2bn (£1.6bn), and marks the first major deal for new GSK chief executive Luke Miels, coming just weeks after he took charge [...]