Ken Griffin's position in Teradyne is currently worth $28.5 Million. That's 0.03% of their equity portfolio (664th largest holding). The first Teradyne trade was made in Q2 2013. Since then Ken Griffin bought shares 56 more times and sold shares on 43 occasions. The stake costed the investor $28.4 Million, netting the investor a gain of 0.3% so far.