Large active and passive fund managers have begun accumulating cash reserves and preparing to sell portions of existing large-cap holdings in anticipation of potentially massive initial public offerings expected in the near future. Companies most often mentioned in this context are SpaceX, OpenAI and Anthropic, whose listings could materially affect institutional positioning in equity markets.
Why funds are building cash
John Flood, deputy CEO of Goldman Sachs, noted that if these new listings are added to major indices, passive funds may be forced by index mechanics to reduce some of their existing large-cap positions to free up cash to buy the new shares. Flood pointed out that ahead of the largest primary share issuances of recent decades, U.S. equity funds without exception increased their cash holdings, and he says the same pattern is observable now.
The Nasdaq 100 and the S&P 500 have introduced rule changes that are expected to accelerate the inclusion of newly listed large companies into those indices. That could be especially relevant for SpaceX: management is preparing for a public listing with an approximate valuation of $1,750 billion (USD 1.75 trillion), which on current prices would make it the seventh-most valuable U.S. company.
OpenAI and Anthropic
OpenAI and Anthropic also plan public offerings in the near term. According to Reuters reporting from last October, OpenAI could target a market capitalization of $1 trillion or more; Anthropic has recently closed a financing round implying a similar, near-$1 trillion valuation. Such valuations could make them eligible for accelerated index inclusion.
Market effects and liquidity
Deutsche Bank analysts say that substantial cash reserves accumulated by retail investors during the pandemic are also supporting demand for new listings. As a result, both investment appetite for equities and available capital may remain strong.
Inclusion in benchmark indices such as the Nasdaq 100 or the S&P 500 matters because institutional investors build significant positions through funds tracking those indices. Index inclusion broadens the shareholder base and improves liquidity, which can reduce the market impact of large sell orders by early investors and management — notably after the typical 90–180 day lock-up periods expire. However, greater liquidity does not entirely eliminate price pressure from insider selling waves.
Analysts at Goldman Sachs and Deutsche Bank both emphasize that new issues admitted to indices via accelerated procedures would initially carry only small weights in the reference indices. Even the largest expected IPO would likely exceed only about 0.1% of the S&P 500’s current total market capitalization.
Conclusion
Fund managers’ cash accumulation and rebalancing is likely to continue in the coming months as markets prepare for potential mega-IPOs. Rule changes and very high pre-listing valuations mean passive fund behavior and institutional demand will be important determinants of post-listing liquidity and price dynamics.
This article does not constitute investment advice or a recommendation.
