SIG is a very aggressive trading company. Look at their last filings: Their three-legged position was skewed towards downside. They increased their puts, reduced calls and added shares. They are playing games. Need and example? Check out last Ziop's secondary.
"Notice latest Morningstar shows BOTH Virtu Financial (130M shares new position) AND Susquehanna Financial Group (added 106M shares to the 114M they previously held) with established or added-to positions as of 9/30/17. "
The number of shares you mention seem incorrect, as ADXS total outstanding stocks are approximately 40M