Are documents uploaded on my business profile publicly visible?

Documents uploaded on a business profile are not publicly visible. They are accessible only to introduced members depending on the option you select on your profile:

If “Display company details to introduced members so that they can know about my company” is checked, introduced members can access the documents. 

If unchecked, then the buyers/investors would not be able to access the documents even after the introduction and would instead see this message: "Profile owner has disabled view of documents. You can request these documents by messaging the user after introduction."