Because Celgene Corporation (NASDAQ:CELG) has faced a fall in interest from upper-tier hedge fund managers, we can see that there were a few hedgies that decided to sell off their positions entirely at the end of the second quarter. It's worth mentioning that Andreas Halvorsen's Viking Global dropped the largest stake of the "upper crust" of funds we track, totaling about $49.4 million in stock, and Ken Heebner of Capital Growth Management was right behind this move, as the fund sold off about $32.5 million worth. These moves are important to note, as aggregate hedge fund interest was cut by 1 funds at the end of the second quarter.