In the top 10 largest companies in the world, only one is based outside the United States. The remaining 9 companies are all US companies.

Market capitalization of the world's largest companies:

1. Apple: $2.08 trillion
2. Aramco: $1.85 trillion
3. Microsoft: $1.70 trillion
4. Alphabet(Google): $1.15 trillion
5. Amazon: $901 billion
6. Berkshire Hathaway: $699 billion
7. Visa: $465 billion
8. Johnson & Johnson: $460 billion
9. UnitedHealth: $459 billion
10. Exxon Mobil: $444 billion

On this list, Aramco is the only company outside the United States. Aramco is a Saudi state-owned oil and natural gas company headquartered in Dhahran.

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