Jim Simons acquired 1.2M Pediatrix Medical Group shares worth $20.5M. That's 0.03% of their equity portfolio (711th largest holding). The investor owns 1.37% of the outstanding Pediatrix Medical Group stock. The first Pediatrix Medical Group trade was made in Q1 2014. Since then Jim Simons bought shares seventeen more times and sold shares on twenty occasions. The stake costed the investor $15.6M, netting the investor a gain of 31% so far.