It's neat that on the map usa is divided into states but other countries are, well, just countries. Why not draw the countries into smaller pieces as well?
If there were many companies per "other country", that would make sense. There are very few companies outside US in the list, and the only country with two entries is UK; both companies are in London.
If the chart had, say, 10 companies from India, showing the borders of India's states on the map would definitely make sense.
https://en.wikipedia.org/wiki/Federated_state