Because Altair Engineering Inc. (NASDAQ:ALTR) has witnessed a decline in interest from the entirety of the hedge funds we track, it's safe to say that there were a few hedgies who were dropping their positions entirely heading into Q4. At the top of the heap, Peter Rathjens, Bruce Clarke and John Campbell's Arrowstreet Capital cut the largest position of the 750 funds monitored by Insider Monkey, totaling an estimated $2.6 million in stock. Paul Marshall and Ian Wace's fund, Marshall Wace LLP, also said goodbye to its stock, about $1.5 million worth. These transactions are intriguing to say the least, as total hedge fund interest stayed the same (this is a bearish signal in our experience).