345K shares after hours at $13.25. That makes about 700K shares at that price on the last day of the month and qtr. There are no institutions with that many shares. Only 2 people have that many shares: Hall and Duncan. No way Hall was the seller. Possibly Duncan was tired of selling 1k here and 1k there and sold. Will be interesting to see who the buyer was. Someone just took a huge stake. Another possibility is the shorter covered but I would have suspected the price to move up in that case. A final possibility is that Duncan was both the shorter and the seller, using his actual shares to cover the short as a hedge.
If it was Duncan or Hall, we will see a filing this week. Otherwise we have to wait until Aug 14.