Guy Spier's position in Berkshire Hathaway is currently worth $43.6 Million. It makes up 22.75% of their stock portfolio and is their biggest 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 $21 Million, netting the investor a gain of 108% so far.