A century-long analysis of the U.S. stock market has revealed a striking trend: nearly all shareholder value created over the past 100 years came from a remarkably small group of companies.
According to a study of 29,754 U.S. publicly listed companies between 1926 and 2025, the market generated a total of $90.96 trillion in shareholder value. However, almost all of that value was created by just 1,082 companies—only 4% of all listed firms. The remaining 96% contributed virtually no net shareholder value.
The research also highlights another important finding. The average stock delivered a negative return of 6.87%, while 59% of companies destroyed shareholder value over their lifetimes. Only 41% outperformed U.S. Treasury bills. The biggest value creators over the past century were all technology giants:
- Apple — $5.02 trillion
- Nvidia — $4.58 trillion
- Microsoft — $4.03 trillion
- Alphabet — $3.57 trillion
- Amazon — $2.27 trillion
Notably, Apple and Nvidia alone accounted for 10.6% of all shareholder value created in the U.S. stock market since 1926. The study also shows that market concentration continues to increase. In 2016, it took 89 companies to account for half of all shareholder value in the U.S. market. Today, that number has fallen to just 46 companies, indicating that an increasingly smaller group of firms is driving the majority of market value.
The findings reinforce a key lesson for long-term investors: stock market returns are not driven by thousands of companies, but by a relatively small number of industry leaders capable of transforming entire sectors. In today’s era of artificial intelligence, cloud computing, and semiconductors, market value is becoming more concentrated than ever among a handful of global technology companies.
