Do Mega-IPOs From Companies Like SpaceX, OpenAI, and Anthropic Mark a Changing Relationship Between Public and Private Markets?

Yes. The expected mega-initial public offerings (IPOs) from SpaceX, OpenAI, and Anthropic will mark an important shift from private capital dominance toward broader public ownership, with implications for index composition, valuation, liquidity, and investor access to frontier technologies. Their significance lies less in their headline valuations than in what they reveal about the evolving boundary between private and public markets. These listings will broaden public access to transformational companies, but at a stage when private investors already have captured significant upside.

The implications for public equity indexes are meaningful. Together, these companies are expected to list at a combined valuation approaching $4 trillion, more than the total amount raised in all IPOs during the entire dot-com era. While the initial free float for each is likely to be far smaller, ¹ index requirements have either already been waived, or are likely to be waived, so these firms could enter major indexes relatively quickly. Over time, as floats and index weights increase, OpenAI and Anthropic would further expand the large weight of technology in public benchmarks, while SpaceX could blur traditional sector lines across industrials, communications, and technology. Their addition could also make expensive parts of the market look richer still. None of the three companies are yet profitable, and SpaceX’s targeted $1.75 trillion valuation would equate to roughly 100x its 2025 revenues.

Read the rest of the publication here.