Jeremy Grantham acquired 79.3 Thousand F5 shares worth $14.4 Million. That's 0.06% of their equity portfolio (199th largest holding). The first F5 trade was made in Q1 2014. Since then Jeremy Grantham bought shares ten more times and sold shares on eight occasions. The stake costed the investor $12.9 Million, netting the investor a gain of 11% so far.