Joe Montana owns a condo there.
https://bleacherreport.com/articles/2708539-joe-montana-reportedly-suing-developers-over-sinking-san-francisco-building
2.7 mil $$$
He is low on the list. The residences are pricey; a penthouse unit sold for US$13 million in December 2016. https://en.wikipedia.org/wiki/Millennium_Tower_(San_Francisco)