Defining the new AI IPO wave and Bank of America’s warning
The current AI IPO wave refers to a cluster of mega-sized public listings by frontier AI companies whose combined valuations and fundraising needs are large enough to change index composition, sector dominance and market concentration risk across global equity benchmarks. Bank of America’s Michael Hartnett warns that the planned IPOs of SpaceX, OpenAI and Anthropic could push tech sector concentration in the S&P 500 weighting beyond a 48% historical threshold. These AI company IPOs together represent almost USD 3 trillion (approx. RM13.8 trillion) in private-market value moving towards public exchanges, with TradingKey estimating their combined fundraising could exceed USD 200 billion (approx. RM920 billion). That size is not only rare; it would arrive in public markets within months, forcing investors and index funds to decide how much more exposure to frontier AI they can accept without losing diversification.
SpaceX, OpenAI and Anthropic: Frontier AI steps into public markets
Anthropic’s confidential S-1 filing has turned speculation into an imminent test of public-market appetite for AI company IPOs. Its latest funding round put the Claude developer at a USD 965 billion (approx. RM4.4 trillion) valuation, vaulting it near the unofficial trillion-dollar club before audited public numbers are available. OpenAI, valued at USD 852 billion (approx. RM3.9 trillion) in March, is preparing a US IPO filing, while more than 600 current and former employees have already sold USD 6.6 billion (approx. RM30.4 billion) of stock on secondary markets. SpaceX is moving fastest, planning a roadshow as early as June 4 and aiming to raise up to USD 75 billion (approx. RM345 billion) at a valuation of USD 1.8–2 trillion (approx. RM8.3–9.2 trillion). Together, these listings would pull an unprecedented volume of capital into a small group of AI-linked business models.
How mega AI IPOs could distort tech sector concentration
Bank of America’s concern centers on tech sector concentration within the S&P 500 weighting if these AI giants join at or near their current valuations. According to Bank of America’s Michael Hartnett, the listing of SpaceX, OpenAI and Anthropic could push the technology sector’s weight in the S&P 500 past 48%, a level that would exceed concentration peaks seen during the Roaring Twenties, the Nifty Fifty era, Japan’s 1980s bubble and the TMT bubble. Citigroup has already described the market backdrop as “highly frothy.” Index funds tracking major benchmarks could be forced to sell existing holdings to make room for these new mega-cap entrants, amplifying flows into one sector. That shift would leave investors more exposed to a narrow group of AI-driven growth stories, heightening market concentration risk and making portfolios more sensitive to any reversal in AI sentiment or earnings expectations.
Capital market strain and liquidity tests as AI IPOs cluster
Beyond index math, the market must absorb an enormous capital call in a short window. TradingKey analysis suggests combined fundraising from the three AI company IPOs could exceed USD 200 billion (approx. RM920 billion). Davidson analyst Gil Luria told Reuters that “the combined demand for capital from SpaceX, OpenAI and Anthropic will be so considerable that it is likely to create disruptions in the capital markets.” Anthropic’s decision to file first reflects the belief that going early secures investor liquidity before it is tied up in other deals. The broader IPO environment has improved, with USD 87.5 billion (approx. RM402 billion) raised through May 26, the highest since 2021, but that recovery predates the arrival of these behemoths. A crowded IPO calendar at such scale could strain underwriting capacity, test trading liquidity and leave latecomer listings fighting for shrinking pools of risk capital.
Implications for diversification, electronics demand and valuation reality
For investors, the main challenge is balancing exposure to AI growth with the need for diversification. If tech sector concentration rises sharply, portfolios tied to broad indexes may become heavily dependent on a few AI platforms and on continued, expensive compute build-outs. At the same time, these companies are central buyers of GPUs, custom accelerators, optical links, memory and datacentre infrastructure, meaning AI IPO outcomes will shape demand across the electronics value chain. Once full prospectuses are public, investors can compare revenue, losses, capital expenditure and governance across SpaceX, OpenAI and Anthropic, narrowing the gap between private optimism and public scrutiny. Jim Cramer argues these three deals “will define 2026 and maybe even 2027,” but cautions that investor cash might be depleted by early offerings. Whether these listings succeed or stumble, they will reset expectations about sustainable AI growth and acceptable market concentration risk.