AI Rivals Anthropic and OpenAI Race Toward IPO as First-Mover Advantage Seen Critical

Anthropic confidentially filed for an initial public offering on June 1, 2026, setting the stage for a high-stakes race with rival OpenAI to tap public markets first, as a delay could severely disadvantage the runner-up in a capital-constrained environment. With SpaceX preparing a massive $1.5 trillion IPO this summer, market experts warn that the first AI lab to list will absorb the limited pool of growth and risk capital, leaving later entrants struggling for investor oxygen. The dynamic echoes the 2019 IPO debacle where Lyft's disappointing debut dragged down Uber's valuation two months later. OpenAI, led by CEO Sam Altman, is working with Goldman Sachs and Morgan Stanley and is expected to file its own confidential IPO within weeks, aiming for a fall listing. Whichever company goes public first not only secures a valuation advantage but also gains a critical tool to retain top AI talent through stock-based compensation, making the outcome of this multitrillion-dollar contest a pivotal moment for the broader AI sector.