With two major AI IPOs still expected over the next 12 months, tech concentration remains a key risk in public markets.
authors
Christopher Bole
Christopher Bole
Vice President, Financial Writer
Hypothetical future S&P 500 weights
Chart showing hypothetical future allocation expectations should SpaceX, Anthropic and OpenAI be included in the S&P 500.
Source: Bloomberg, Future Standard, news reports, as of June 1, 2026. Existing members reflect current index weights. Potential new member weights reflect reports of IPO target ranges ($1.75 trillion for SpaceX, $1.4 trillion for Anthropic, and $1 trillion for OpenAI). Note: Hypothetical S&P weightings are provided for informational and illustrative purposes only. Future S&P weightings are subject to change based on economic and market conditions.
  • Tech stocks led a global pullback this week as investors questioned the long-term profitability of AI and chipmakers amid heavy capex spending.
  • The selloff highlights a broader risk: Rising market concentration is increasing the need for diversified sources of growth.
  • That risk could intensify if large AI-related IPOs come to market. Following SpaceX, OpenAI and Anthropic are widely expected to list, together representing an estimated $3.6 trillion in value.1
  • For illustrative purposes, adding these three companies to the 10 largest U.S. tech stocks to the S&P 500 Index by year-end 2027 could increase their combined weight to nearly half of the Index, further concentrating exposure in a single theme.1
  • As concentration risks build in the public markets, the U.S. middle market offers a more diversified opportunity set, with over 200,000 companies that better reflect the breadth and composition of the U.S. economy than the tech-heavy public markets.

This week’s chart is drawn from the Q2 2026 Mapping the Markets: Shocks and Awe, a quarterly chartbook from Future Standard’s Investment Research team showcasing the most important trends shaping the public and private market landscape.

contributing authors
Christopher Bole
Christopher Bole
Vice President, Financial Writer
footnotes + disclosures
  1. Bloomberg, Future Standard, news reports, as of June 1, 2026. Existing members reflect current index weights. Potential new member weights reflect reports of IPO target ranges ($1.75 trillion for SpaceX, $1.4 trillion for Anthropic, and $1 trillion for OpenAI).

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