15/06/2026
Top Ten Companies by Decade
Spot the odd one out.
Kodak. AIG. Citigroup. Bank of America. All once sat in the top 10 of the S&P 500 by market cap.
This chart, covering 40 years of S&P 500 data, tells you everything you need to know about why diversification and adaptability matter more than conviction in any single name.
The total market cap of the top 10 has grown from $251B in 1985 to $19.4 trillion in 2025. The wealth creation is extraordinary. But it has flowed to completely different companies than anyone predicted.
Change really is the only constant.
What will the 2035 list look like?