Artificial intelligence powerhouse Anthropic has confidentially filed for a U.S. initial public offering, positioning itself ahead of rival OpenAI in a closely watched contest to become the defining public company of the AI era. The move marks a pivotal moment for both the technology sector and financial markets, as investors prepare to evaluate whether the extraordinary valuations assigned to leading AI firms can withstand the scrutiny of public markets.
The company, known for its agentic coding assistant Claude Code, did not reveal the size or terms of the planned offering. However, Anthropic’s most recent funding round in late May valued the company at approximately $965 billion, surpassing OpenAI and placing it among the most highly valued private companies in the world. If the IPO proceeds at a similar valuation, Anthropic could immediately rank among the largest companies in major U.S. stock indexes, influencing benchmark performance, capital flows, and investor sentiment.
Anthropic’s filing comes amid growing anticipation surrounding a new generation of blockbuster public offerings. Reports indicate that OpenAI is also preparing to confidentially file for a U.S. IPO, while SpaceX is pursuing a massive public offering that could value the aerospace company at $1.75 trillion. Together, these listings are expected to compete for vast amounts of institutional capital, creating one of the most significant periods for equity issuance in recent history.
Market analysts view Anthropic’s timing as a strategic advantage. By moving first, the company gains an opportunity to define how frontier AI businesses present their financial performance and growth prospects to public investors. At the same time, some experts argue that OpenAI may benefit from waiting, allowing it to observe investor reactions to Anthropic’s disclosures and valuation metrics before determining its own path to market.
The filing underscores the intensifying competition between Anthropic and OpenAI, two companies that have emerged as central players in the global AI boom. Their rapid growth has transformed corporate strategies worldwide, intensified demand for computing infrastructure and specialized talent, and elevated AI-related firms to some of the highest valuations ever seen in the technology industry.
Anthropic’s rise has been particularly dramatic. The company’s valuation has more than doubled since February, when it raised $30 billion at a valuation of $380 billion. Its accelerating progress in autonomous AI capabilities has drawn both enthusiasm and concern from investors, with some market participants warning that increasingly advanced AI systems could disrupt traditional software and information technology business models across multiple industries.
The company’s latest funding round attracted a powerful group of investors spanning Silicon Valley and Wall Street, including Blackstone, Brookfield, D1 Capital Partners, GIC, General Catalyst, and Insight Partners. Their backing reflects growing confidence that AI companies could become some of the most influential businesses of the coming decade.
Analysts believe the race to public markets is being driven not only by prestige but also by the need to secure capital before investor demand becomes saturated. With SpaceX, Anthropic, and OpenAI all seeking enormous funding opportunities, competition for institutional investment is expected to intensify. Experts warn that the combined capital requirements of these firms could create significant disruptions across financial markets, making early access to investors a crucial strategic advantage.
The broader IPO market appears increasingly receptive to such high-profile listings. According to Dealogic data, companies worldwide raised $87.5 billion through public offerings by late May, the strongest year-to-date performance since 2021. Several major U.S. IPOs are also scheduled to launch in the coming days, signaling renewed momentum for a market that had remained subdued for much of the past several years.
As Anthropic moves toward becoming a public company, investors will be watching closely to determine whether the enthusiasm surrounding artificial intelligence can translate into sustained public-market demand. The company’s debut could serve as a defining benchmark for the valuation of frontier AI businesses and shape the future trajectory of one of the fastest-growing sectors in the global economy.
