The Largest Financial Companies by Market Cap in October 2026

Berkshire Hathaway, JPMorgan Chase, and Visa are the biggest companies by market cap in the financial sector

By Lyle Daly – Updated Oct 5, 2026 at 12:34 AM EST | Fact-checked by Frank Bass

Key Points

  • Berkshire Hathaway leads with a $1.1 trillion market cap in the financial sector.
  • JPMorgan Chase, the largest U.S. bank, aggressively incorporates AI into its services.
  • Visa processed 258 billion transactions in 2025, leading payment network innovations.

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