Ken Griffin's position in Tesla is currently worth $14.6 Billion. It makes up 21.35% of their stock portfolio and is their biggest holding. The investor owns 1.98% of the outstanding Tesla stock. The first Tesla trade was made in Q2 2013. Since then Ken Griffin bought shares 39 more times and sold shares on 39 occasions. The stake costed the investor $2.33 Billion, netting the investor a gain of 525% so far.