“The S&P 500’s rules remain clear: companies must be publicly traded and profitable before they can be included in the index.”
SpaceX is one of the most valuable companies in the world. It launches rockets, carries astronauts into space, operates the fast-growing Starlink satellite network, and is led by billionaire entrepreneur Elon Musk. Despite all that success, SpaceX still cannot join the prestigious S&P 500.
According to a report by Ars Technica, the company remains ineligible for inclusion in the index because it does not meet one of the most important requirements: it is not publicly traded.
The S&P 500 is widely regarded as the benchmark for the U.S. stock market. It tracks 500 of the largest publicly traded companies in the United States and is used by investors around the world to measure the performance of corporate America. Companies included in the index benefit from increased visibility and often attract billions of dollars in investment from funds that track the S&P 500.
However, getting into the index is not automatic. A company must satisfy several requirements, including having a significant market value, meeting liquidity standards, maintaining a public stock listing, and demonstrating profitability over a specified period.
SpaceX fails one of those key tests because its shares are not traded on public stock exchanges.
The company remains privately held, with ownership concentrated among founders, employees, and private investors. Although investors can buy shares through private funding rounds, ordinary stock market investors cannot purchase SpaceX shares directly on public exchanges.
That single factor prevents the company from being considered for inclusion in the S&P 500 regardless of its valuation. The issue has gained attention as SpaceX’s value continues to climb.
Private market transactions have placed the company’s valuation at hundreds of billions of dollars, making it one of the most valuable private companies in history. Its rapid growth has been driven by several businesses.
The company’s launch services continue to dominate the global commercial space market, while Starlink has become one of the world’s largest satellite internet networks. Together, these operations have transformed SpaceX from an ambitious startup into a global space powerhouse. Yet size alone is not enough.
S&P Dow Jones Indices committee has shown little interest in relaxing its eligibility requirements, even as some investors argue that major private companies should be included due to their economic significance. The report also notes that similar rules continue to affect some artificial intelligence companies.
Several high-profile AI firms have attracted enormous valuations, but many remain unprofitable or privately held. As a result, they also cannot qualify for inclusion in the S&P 500. The committee has maintained that profitability remains a key requirement.
This means that even companies attracting billions of dollars in investment and generating widespread public attention must still demonstrate sustainable earnings before they can enter the index. Supporters of the current system argue that the rules help protect the quality of the benchmark.
The S&P 500 is designed to represent established companies with proven business models, not simply firms with high valuations or investor excitement. Requiring profitability helps ensure that companies included in the index have demonstrated an ability to generate earnings over time. Critics, however, argue that the rules may not fully reflect the modern economy.
Many technology and AI companies spend years prioritizing growth over profits. During that period, they can become enormously influential while remaining excluded from one of the world’s most important stock market indexes.
SpaceX is perhaps the clearest example of that debate. The company has changed the economics of space launches, developed reusable rockets, built a global satellite internet service, and secured major government contracts. Yet ordinary investors still cannot gain exposure to the company through S&P 500 index funds because it remains private.
For now, there appears to be little chance of that changing. Unless SpaceX decides to launch an initial public offering (IPO) and list its shares on a public exchange, it will remain outside the index regardless of how large it becomes.
The same reality applies to many private AI startups currently attracting billions of dollars in funding. Their valuations may continue to rise, headlines may continue to celebrate their growth, and investors may continue to pour money into them. Yet without meeting the S&P 500’s requirements, they will remain on the outside looking in.
The situation highlights an interesting reality in today’s business world. A company can be one of the most influential businesses on the planet, worth hundreds of billions of dollars and shaping entire industries, yet still be excluded from one of the most important stock market benchmarks.
For SpaceX, the obstacle is not size, popularity, or innovation. It is simply the fact that the company has chosen to stay private.
Until that changes, one of the world’s most valuable companies will continue watching the S&P 500 from the sidelines.
