Economics 30 Sept 2026

Seven stocks now own 31% of the S&P 500

Seven companies are 1.4% of the S&P 500's constituents but about 31% of its market value.

Those seven companies also account for roughly 26% of the index's expected earnings. That gap between weight and profits is one reason analysts watch index concentration closely.

• Share of constituents: 1.4%
• Share of market value: ~31%
• Share of expected earnings: ~26%