Perfect answer to the form t's
the market makers were caught short when positive company news hit the wire and buyers began jumping into the stock. When this happens, their defensive move is to hold orders in-house until after the market closes in order to conceal the actual volume level during the day. In doing so, they make it appear as though trading interest in the stock is slow and low.
This tactic can obviously have a dampening effect on price, at least in the short term. But the excellent news for UTOG investors is that, despite their best efforts, the market makers failed miserably."
It's all in the filings - do your homework before buying a stock and read the filings!