The Top-Customer Analysis Report would display metrics on which Company raises the most or least tickets. 

To have ticket metrics displayed on this report, you would first have to associate Customers to Companies. Once this is done, the tickets raised by the requesters from a company would be tracked and the report on Top five Companies (based on ticket volume) would be generated. 

There is a toggle button to see the top 5 and bottom 5 customers in each metric by clicking on the sort button in the top right corner.

If you would like to get a report on each/all contacts and companies and not just the top/bottom 5, you can use the Export option from the Ticket List View where you can filter the tickets by Contacts or Companies.