Coop Expanded by Dalton Maag is very close, but I can’t find a source for it:
http://www.findmyfont.com/index.php/fonts/font-preview?fset=DaltonMaag%2...

Isn’t Coop an House Ind. thing (http://www.houseind.com/fonts/typographyofcoop)? Maybe DaMa changed the name.

Populous website uses Proxima Nova, a good match for all letters except /S (obvious) which actually reminds me a lot of... Arial (closer look to /S Extra Bold here). And Arial is also used on their website... Coincidence?
Ready-to-go option: Union

Thanks for these great thoughts! It just occurred to me that the R in the trademark looks like Gotham. Seems like this logo is done by more than one person?

It just occurred to me that the R in the trademark looks like Gotham.

... or Proxima Nova and you should end up with 2 fonts only :)