Pfizer Inc. ( PFE ) : PFE is a global pharmaceutical company that discovers and develops branded prescription drugs for cardiovascular and metabolic diseases and other conditions. It operates via three business segments: health care, animal health and consumer health care. This is collectively the largest position for mega funds in the big pharmaceuticals group, and together they hold an outsized 32.0% of the outstanding shares, compared to their 19.8% weighting in the group. In Q3, mega funds added a net $60 million to their $54.08 billion position in the group. The largest buyer in Q3 by far