I have opened corporate account with Bitstamp back in 2013 and bought some coins without problems (with wire from my company).

I have been wise enough to ask them some questions before to send my next wire.

They pretend that I never opened corporate account and I need to open corporate account if I want to fund my Bitstamp account (already verified corporate account) with wire transfer from my company!

And they ask for shitload of docs to provide.

They also may not open account for your company if they are not satisfied with your business practice (for example, if you use their service to pay freelancers with Bitcoin).

I posted their guide for opening corporate account and similar story from another user in my blog:

Bitstamp pretends I never verified my corporate account and my account is personal