Ken Griffin's position in ProShares Trust - ProShares Ultra S&P500 2x Shares is currently worth $15.8 Million. That's 0.02% of their equity portfolio (940th largest holding). The investor owns 58.36% of the outstanding ProShares Trust - ProShares Ultra S&P500 2x Shares stock. The first ProShares Trust - ProShares Ultra S&P500 2x Shares trade was made in Q2 2014. Since then Ken Griffin bought shares 53 more times and sold shares on 56 occasions. The stake costed the investor $6.9 Million, netting the investor a gain of 129% so far.