Jim Simons's position in Medifast is currently worth $11.7 Million. That's 0.02% of their equity portfolio (842nd largest holding). The investor owns 8.01% of the outstanding Medifast stock. The first Medifast trade was made in Q2 2013. Since then Jim Simons bought shares 29 more times and sold shares on seventeen occasions. The investor's estimated purchase price is $48.2 Million, resulting in a loss of 76%.