Vanguard is a very large & highly respected fund family & its founder, John Bogle, is a "Main Street" / Wall Street heavyweight.
the fact that Vanguard is holding 800K+ shares (& added last Q) is actually one of the few things that voids can really champion right now IMO (& i must admit it gives me pause) as a "done deal" fact. (e.g., Intel site still says "coming soon" & yeah, i know, awk & 24601 & one or two others purportedly purchased 865 MBs from e-bay & the like...)