When a search is performed on an individual, all the companies that the individual is a member of or director of (or has been in the past) are listed in the enquiry.
This allows the rental agent / landlord to validate the information that has been supplied to them by the applicant and also establish a risk profile based on the status of the companies listed - e.g. if the individual is a member of many companies which have been liquidated they could be considered a high risk tenant.
When a search is performed on a company, all the directors (current and historic) are listed in the enquiry.
Again, this allows the rental agent / landlord to validate the information that has been supplied to them by the applicant.