Ken Griffin's position in SSgA Active Trust - SPDR S&P 500 ETF Trust is currently worth $44.5 Billion. It makes up 52.09% of their stock portfolio and is their biggest holding. The investor owns 18593.01% 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 43 more times and sold shares on 44 occasions. The stake costed the investor $34.8 Billion, netting the investor a gain of 28% so far.