Guy Spier acquired 30 Berkshire Hathaway shares worth $12.7 Million. That's 7.30% of their entire equity portfolio (6th largest holding). The first Berkshire Hathaway trade was made in Q4 2014. Since then Guy Spier bought shares one more times and sold shares on one occasions. The stake costed the investor $6.92 Million, netting the investor a gain of 84% so far.