Joel Greenblatt acquired 61.8 Thousand F5 shares worth $10.8 Million. That's 0.17% of their equity portfolio (111th largest holding). The first F5 trade was made in Q3 2011. Since then Joel Greenblatt bought shares 25 more times and sold shares on 24 occasions. The stake costed the investor $7.3 Million, netting the investor a gain of 47% so far.