US stocks make moves | Sanofi agrees to acquire Dova Pharmaceuticals for $2.2 billion, causing Dova Pharmaceuticals' stock to surge nearly 40% before the market opens.

According to the Wisdom Finance APP, on Wednesday, Dynavax Pharmaceuticals (DVAX.US) surged nearly 40% in pre-market trading to $15.56. On the news front, Sanofi (SNY.US) has agreed to acquire Dynavax Pharmaceuticals for approximately $2.2 billion, aiming to expand its vaccine product line with a focus on flu vaccines. According to a statement released by Sanofi on Wednesday, it will acquire Dynavax Pharmaceuticals, headquartered in Emeryville, California, for $15.50 cash per share. This offer represents a 39% premium over Dynavax Pharmaceuticals' closing price on Tuesday.