Shares of engineering simulation software provider Ansys (NASDAQ:ANSS) fell 5.4% in the afternoon session after the company announced that it has agreed to be acquired by Synopsys, with Ansys shareholders set to receive $197 in cash and 0.345 shares of Synopsys common stock per Ansys share. This equates to a $390 per share offer price. The resulting enterprise value is approximately $35 billion, making for a large deal in semis.