RE: he's not sellingS. Inwentash bought many millions shares between 1.10 - 1.50. I don't really know its net worth, but my guess would be about $500M. This guy has been investing in junior mining company for about 15 years now (maybe more)... I tend to follow his moves and so far I was not disappointed
I invested in Pinetree capital (Inwentash is the CEO of Pinetree and owns about 15% of the company) and I made good ROI... I hope it's going to be the same with WPX .. It might take more time (maybe even a year) but I am pretty convinced that this is a good risk / reward play.