The Company List page works based off the Teamraiser stats functionality.  Every 15 minutes a task runs that will analyze any new items and update the corresponding stats connected to Participant, Team, Company, and Event.  National and/or Regional companies would not automatically be added to the complist page on creation of the event or if it is copied from another event.  Once an item is connected to the company (gift, team, participant) then it will be pulled into the company list page on the next task run