Ken Griffin's position in TransUnion is currently worth $207M. That's 0.18% of their equity portfolio (120th largest holding). The investor owns 1.20% of the outstanding TransUnion stock. The first TransUnion trade was made in Q2 2015. Since then Ken Griffin bought shares 58 more times and sold shares on 43 occasions. The stake costed the investor $171M, netting the investor a gain of 21% so far.