Hopefully Braised can help out. He understands these things as well as anyone. To me it looks like what is being reported is old news. Morningstar shows Blackrock unloading these shares to ~18 million back on 5/31/15.
I also see the filing date for this was 12/31/15...So is Blackrock required to provide an annual update of what shares they own? The only other thing I noticed is that the filing lists the subsidiaries. So if all of those shares are included too, then they likely went down more than the 5-6 million shares from ~24M to ~18M.
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