Ken Griffin acquired 341 Thousand Berkshire Hathaway shares worth $138 Million. That's 0.15% of their equity portfolio (150th largest holding). The first Berkshire Hathaway trade was made in Q2 2013. Since then Ken Griffin bought shares 62 more times and sold shares on 40 occasions. The stake costed the investor $99.2 Million, netting the investor a gain of 39% so far.