Volume is very high. From historical data, SUPN had volume of 3,501,000 on June 26, 2012, the day
Supernus Pharma received tentative approval of Trokendi XR from FDA (5.74 ) and it more than doubled in few days. Then on Nov 30'12, the volume was really high 5,493,400 and at that time 6 million shares were issued at a price of 8.
Some kind of sophisticated game may be in play here as stock and call volume is very high. Who knows what is going on? And we can only hope that we don't get screwed by these guys. May be the drug is selling more than the expectation.