The Magnificent Seven Stocks: Market Cap, S&P 500 Weight, and Returns

The Magnificent Seven made up 34% of the S&P 500's value in September 2026.

By Lyle DalyUpdated Sep 8, 2026 at 7:42 PM EST | Fact-checked by Frank Bass

Key Points

  • The Magnificent Seven stocks make up 33.9% of the S&P 500 as of September 2026.
  • Nvidia leads the S&P 500 impact at 7.9%, growing from <1% of Magnificent Seven's cap in 2015.
  • Despite underperforming the S&P 500 in 2026, Magnificent Seven grew 10.63% year-to-date.

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