My recollection is that there is a still a residual law that requires the Potash Corp head office to be in Saskatchewan. Brad Wall extracted additional commitments from Bill Doyle, at the time of the BHP takeover attempt, to follow the law in more than just naming the Saskatoon "the head office". Several executive teams were moved from Chicago and Doyle bought a condo in the Renaissance.
I cannot see Brad Wall easing up on this. The SK Gov't has an incredible amount of influence on these companies as all the mines are subject to SK regulation and taxation.
I can see the Agrium retail farm supply business being spun off. that might remain headquartered in Calgary.
https://www.saskatchewan.ca/governme...rom-potashcorp