Ken Griffin's position in SSgA Active Trust - SPDR S&P 500 ETF Trust is currently worth $21.1 Billion. It makes up 21.47% of their stock portfolio and is their biggest holding. The investor owns 18575.48% of the outstanding SSgA Active Trust - SPDR S&P 500 ETF Trust stock. The first SSgA Active Trust - SPDR S&P 500 ETF Trust trade was made in Q1 2014. Since then Ken Griffin bought shares 48 more times and sold shares on 51 occasions. The stake costed the investor $13 Billion, netting the investor a gain of 62% so far.