Check NASDAQ web site, the information is there.
If they bought low, why would I want to buy high?
Because their position has to double or triple to be typical of their style.
That report is dated 3/31/13, like all institutional info. Unfortunately, we have no idea what happened in April, May or June....
As of March 31, they had ADDED 1,412,475 shares to their previous position, basically DOUBLING down. I don't think we need to consult a rocket scientist to tell us, they LIKE, the potential for growth in their HALO position. :-)