In the US we Have:

In the USA, we have:

7000 taxi medallions.
8 Major Film Studio Companies. (‘The Majors’)
15 Large Banks.
3 Major Radio Stations.
3 Major Labels.
2 Major Ticketing companies.
2 Major broadband providers.
2 Major telcos.
~150 MVNOs. (Mobile Virtual Network Operators)
10 Major Movie Theater Chains.
4 Big Accounting Companies. (“The Big 4.”)
10 Major Grocery Companies
7 Major Financial Analytics Companies – Terminal
5 Credit Card Companies(Visa, MC, Mastercard, Amex, Discover)