The world’s biggest investment funds are preparing for what could become one of the most transformative periods in stock market history. As highly anticipated companies like SpaceX, OpenAI and Anthropic inch closer to potential blockbuster IPOs, mutual funds and passive index funds are already reshuffling their portfolios to make room for the next generation of trillion-dollar giants.
According to analysts and market strategists, the coming IPO boom could trigger a major shift in how money flows through Wall Street, especially as benchmark indexes such as the S&P 500 and Nasdaq 100 introduce faster pathways for newly listed megacap companies to join their ranks.
Credits: Reuters
Funds Are Quietly Stockpiling Cash
Large asset managers are reportedly increasing cash reserves and preparing to trim existing positions in major large-cap stocks ahead of these listings. The reason is simple: passive index funds that track benchmarks like the S&P 500 must buy shares of newly added companies, often in massive quantities.
John Flood, Managing Director at Goldman Sachs, noted that investors are becoming increasingly focused on the impact of huge IPOs entering the market. Historical trends also support the pattern. Ahead of the four largest IPOs over the past few decades, U.S. equity mutual funds increased their cash balances in anticipation.
This time, however, the scale could be unprecedented.
SpaceX Could Instantly Become One of America’s Biggest Companies
Among the most closely watched IPO candidates is Elon Musk-led SpaceX, which is reportedly targeting a staggering valuation of around $1.75 trillion. If achieved, the company would instantly rank among the seven most valuable publicly traded companies in the United States.
That kind of valuation would make SpaceX too large for major indexes to ignore. With the Nasdaq 100 and S&P 500 expected to accelerate inclusion timelines for megacap listings, SpaceX could enter benchmark indexes relatively quickly after going public.
Such inclusion would force passive investment vehicles to purchase billions of dollars worth of shares almost immediately, creating enormous liquidity and demand for the stock.
OpenAI and Anthropic Could Ignite an AI Investing Frenzy
The excitement is not limited to space technology. Artificial intelligence leaders OpenAI and Anthropic are also emerging as likely IPO candidates in the near future.
Reports suggest OpenAI could pursue a valuation exceeding $1 trillion at the time of its listing, while Anthropic is reportedly in discussions for funding that could value the company near the same mark.
If both companies eventually go public, they could spark one of the largest AI-driven investment waves ever seen in public markets. Investors are already drawing comparisons to the dot-com boom of the late 1990s, though many analysts believe today’s AI leaders have far stronger revenue potential and enterprise adoption.
The anticipation surrounding these companies is also attracting retail investors, many of whom remain flush with cash accumulated during the pandemic years.
Retail Investors Could Fuel the IPO Mania
Analysts at Deutsche Bank noted that household cash balances remain historically high, providing significant firepower for equity investments.
That means the upcoming IPO cycle may not rely solely on institutional capital. Retail participation could also play a major role, particularly as AI and space technology capture mainstream investor imagination.
Strong public demand could further boost valuations and trading volumes once these companies officially hit the market.
Why Benchmark Inclusion Matters So Much
Joining major indexes like the S&P 500 or Nasdaq 100 is a major milestone for any company. Inclusion opens the door to deep pools of institutional capital, since index-tracking funds are required to hold the stock.
This not only broadens the shareholder base but also improves long-term liquidity in the market.
For founders, executives and early investors, that liquidity becomes especially important once IPO lockup periods expire, typically within 90 to 180 days after listing. A deeper market can absorb larger sell orders more efficiently, potentially reducing volatility.
However, analysts caution that benchmark inclusion is not a complete safeguard against heavy insider selling pressure.
Credits: Reuters
The Market Impact May Be Smaller Than Expected — For Now
Despite the enormous headlines surrounding these IPOs, Deutsche Bank analysts pointed out that even the largest expected IPOs currently represent just over 0.1% of the total S&P 500 market capitalization.
Initially, companies like SpaceX or OpenAI would likely carry relatively small index weights. But over time, as more shares become publicly tradable and their float factors increase, their influence on the broader market could grow significantly.
For Wall Street, the message is clear: the next generation of tech giants is preparing to arrive on public markets, and investors are already positioning themselves for what could become a historic transformation in global equities.
