It looks like it may be retail bringing the stock up in hopes of the merger going through, not necessarily insiders buying it up. Today was a down day, after the gap up, possible that profit takers came in to play to stop any upward movement. I'm hoping those profit takers made a mistake.
However, the gap up occured before market open so today had nothing to do with retail bringing the stock up. Retail doesn't trade prior to market opening, only insiders do?
Still profit takers took control after market opened.
ie. I'm an amatuer at this stuff.