Where Data Tells the Story
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On October 27, 2025, the largest U.S. companies—Alphabet, Amazon, Apple, Berkshire Hathaway, Broadcom, J.P. Morgan, Meta, Microsoft, Nvidia, and Tesla—represented 41.4% of the S&P 500’s market value, up from 33% in 2023, with a combined market capitalization of $25.3 trillion.