Largest Companies by Market Cap 2025

Explore the largest publicly traded U.S. companies ranked by market capitalization. This list covers the S&P 500 and Russell 3000, tracking market value and sector weightings of major corporations such as Apple, Microsoft, and Amazon.

Updated daily, this ranking provides investors with a clear view of the biggest U.S. and global stocks by total valuation. Compare market cap trends, sector dominance, and performance relative to peers. For advanced filtering, try our AI Stock Screener.