Jim Simons acquired 839 Thousand Pediatrix Medical Group shares worth $12.1 Million. That's 0.02% of their equity portfolio (823rd largest holding). The investor owns 1.09% of the outstanding Pediatrix Medical Group stock. The first Pediatrix Medical Group trade was made in Q1 2014. Since then Jim Simons bought shares sixteen more times and sold shares on nineteen occasions. The stake costed the investor $10.5 Million, netting the investor a gain of 16% so far.