Look at my edit. Every big company or bank became big by looking after itself. They aren't going to suddenly give a fuck about whether a exit is good for the general public. They are only going to care how it effects them.
Which is exactly my point. I'm not aware of any big company or bank going publicly with any kind of message for remain or leave, understandably so, but their analysis show quite a similar impact on the economy as the Treasury one. .