"Denner would be a threat to someone holding a short position. The better Denner and Array do, the more money the short loses. So shorts are probably not too happy with Denner and the success Denner is bringing to the company. If I were an entrenched and highly exposed short, I would also seek to destroy Denner and, by extension, the company."
I am quoting trading_cyclist's post linked by the following URL: