Yikes!  That might sound like a positive thing for bitcoin, but it kind of scares me.  Just imagine if just a couple of those companies needed to dump their bitcoin holdings onto the market all at once--I would hope that they'd work out private deals instead of using exchanges, but who knows?

Aside from the fear of bitcoin being held by an increasingly large number of companies, I'm amazed that this is actually happening and I certainly would not have predicted corporations would start buying up bitcoin to hold as cash reserves/investment/whatever. 

So 2.85% held by these companies.  How much do the Winklevii twins hold?  And I can't even remember how much is in Satoshi's wallet, percentage-wise.  Makes me wonder how many individual bitcoin holders there really are out there.