Ken Griffin's position in SSgA Active Trust - SPDR S&P 500 ETF Trust is currently worth $36 Billion. It makes up 33.33% of their stock portfolio and is their biggest holding. The investor owns 5161.31% 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 52 more times and sold shares on 56 occasions. The stake costed the investor $20 Billion, netting the investor a gain of 80% so far.