Where Data Tells the Story
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As of October 27, 2025, the ten largest U.S. companies—Apple, Microsoft, Alphabet, Amazon, Nvidia, Meta, Broadcom, Tesla, Berkshire Hathaway, and JP Morgan—reached a combined market capitalization of $25.3 trillion, up 23.9% ($4.9T) year-to-date. They now account for a record 41.4% of the S&P 500, reflecting rising concentration in U.S. equities. AI-driven growth propelled gains in Nvidia, Microsoft, Alphabet, Broadcom, and Meta.