Last week's string of IPOs may be the last big burst of activity before the dog days of August. But two biobankers told BioCentury they expect a ramp-up in September and a flurry of IPO activity in October and November.

Last week alone saw five IPOs raise $320.7 million, with Agios Pharmaceuticals Inc. (NASDAQ:AGIO) and Onconova Therapeutics Inc. (NASDAQ:ONTX) soaring on their first day of trading