What do the buyers at Fidelity know? They haven't attended any of the super secret meetings in the treehouse. Only the smartest and the most plugged-in were invited. I was naturally excluded.
I don't see Pershing Square on there at all, even though Ackman has publicly published his Fannie Mae holdings. That's part of why I don't trust any of these institutional holdings lists to be comprehensive.
Those three combine for another $164M in FnF prefs, mostly FNMAS and FMCKJ. I looked at several other funds and didn't see any FnF common or pref ownership.
Combined with the $760M of prefs and $330M of commons in the Growth Fund of America, I get an overall pref percentage of 73.7%. I didn't look at every single fund, though, so if I missed any other FnF common or pref ownership let me know.