Tom Gayner's position in Berkshire Hathaway is currently worth $626 Million. That's 6.24% of their entire equity portfolio (2nd largest holding). The first Berkshire Hathaway trade was made in Q1 2010. Since then Tom Gayner bought shares fourteen more times and sold shares on eleven occasions. The stake costed the investor $227 Million, netting the investor a gain of 176% so far.