Ken Griffin's position in Hologic is currently worth $231 Million. That's 0.23% of their equity portfolio (79th largest holding). The investor owns 1.31% of the outstanding Hologic stock. The first Hologic trade was made in Q2 2013. Since then Ken Griffin bought shares 52 more times and sold shares on 46 occasions. The stake costed the investor $230 Million, netting the investor a gain of 0.6% so far.