Anthropic has reportedly submitted a draft Form S-1 registration statement to the U.S. Securities and Exchange Commission (SEC), becoming one of the first major AI developers to formally begin the process of going public. Filing an S-1 is the first official step toward an initial public offering. The number of shares to be sold and the final pricing range have not yet been disclosed, as those details are typically determined closer to the offering date and depend on market conditions. The filing is notable because Anthropic appears to have moved ahead of OpenAI in the race toward a public listing. Reports circulating at the end of May 2026 suggested OpenAI was preparing its own S-1 filing and targeting a public market debut later in the year. Anthropic, however, appears to have taken the first formal step. Shortly before the reported filing, Anthropic completed a major financing round. The company reportedly raised $65 billion in a Series H funding round at a post-money valuation of $965 billion. The round was reportedly backed by Altimeter Capital, Dragoneer, Greenoaks, and Sequoia Capital, making it one of the largest funding rounds ever completed in the AI sector. A Potential $4 Trillion IPO Wave Anthropic's reported filing arrives during what could become one of the most significant periods for public offerings in recent history. SpaceX reportedly filed an S-1 registration statement in May 2026 and is expected to pursue a Nasdaq listing under the ticker SPCX. Meanwhile, OpenAI is reportedly evaluating a public market debut that could value the company at approximately $1 trillion. Based on current estimates, the combined valuation of Anthropic, OpenAI, and SpaceX could reach between $3.7 trillion and $4 trillion when the companies eventually enter public markets. Such figures would place the trio among the most valuable corporate entities ever introduced to public investors and could create one of the largest tests of market liquidity in modern financial history. Why Anthropic's Governance Structure Matters Founded in 2021 by former OpenAI researchers, including CEO Dario Amodei, Anthropic is best known for developing the Claude family of AI models. The company has expanded rapidly across enterprise AI, coding assistants, and agent-based applications, generating significant revenue growth in recent years. However, one of the most important aspects of any future IPO may not be its valuation but its governance structure. Anthropic operates as a Public Benefit Corporation and uses a Long-Term Benefit Trust (LTBT) framework that is designed to prioritize the company's mission alongside shareholder interests. Under this structure, the trust is expected to gain the ability to elect a majority of the board of directors over time. That arrangement could limit the influence of ordinary shareholders on major strategic decisions and may become a significant point of interest for regulators and prospective investors. Public companies with comparable governance frameworks remain extremely rare, making Anthropic's approach a potentially important test case for future AI companies. The broader market backdrop adds another layer of significance. Goldman Sachs has projected that the U.S. IPO market could raise as much as $160 billion in 2026, potentially making it one of the strongest years for public offerings in decades. Whether public markets can absorb multiple mega-listings simultaneously without significant valuation pressure remains an open question. If Anthropic, OpenAI, and SpaceX all proceed with their plans, investors may soon find out.
