As of October 2021, the top 10 companies with the highest market capitalization are:
1. Apple Inc.
2. Saudi Aramco
3. Microsoft Corporation
4. Alphabet Inc. (Google)
5. Meta Platforms Inc. (formerly Facebook Inc.)
6. Amazon.com Inc.
7. Tencent Holdings Limited
8. Tesla Inc.
9. Visa Inc.
10. Johnson & Johnson
Please note that market capitalization values can fluctuate over time, and this list may change accordingly.