Real Estate Company Rankings

Dear Forum Experts,

Not sure if this is the correct forum, but here it goes: is there any listing ranking the largest real estate-related companies in the US or even the world? I know it's a very pulverized business segment with many local players, but maybe there is such a list somewhere - I've not found it, but maybe I've not looked at the right sites.

Thanks for any hints or directions.

Daniel Godoy
Brasília, Brazil.