Nice - with that many shares I would call the CEO and talk with her and see what is going on. Find out if they sold any of those shares they had of a sister company on the big run up a year or two ago. Forget the name now, I had posted here asking that question if I recall.
Sometimes mysterious buying out of the blue can preceed something big as some one in the know loads up in advance
Well worth the time if you have it to call the company imo
Before you criticize a man, walk a mile in his shoes. That way, if he gets angry, he's a mile away and barefoot.