Gritstone raises $100M in upsized IPO

Adding to the flurry of life sciences IPOs this week, Gritstone Oncology Inc. (NASDAQ:GRTS) raised $100 million through the sale of 6.7 million shares at $15 in its IPO late Thursday. The price was at the top of Gritstone's proposed range of $13-$15; it had planned to sell 6.1 million shares. The deal values the company at $432 million.