Anthropic (ANTH.PVT) is preparing to file its S-1 investor prospectus as early as Friday, as confirmed by three sources familiar with the company's plans. This filing could represent a pivotal moment for what may be the largest initial public offering (IPO) in history, expected to exceed SpaceX's (SPCX) IPO from June. The public debut is seen as a significant test of investor confidence in the burgeoning artificial intelligence sector, particularly amid growing concerns over extensive spending within the industry.
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The company submitted a confidential draft IPO registration statement to the Securities and Exchange Commission (SEC) in June. Under SEC guidelines, firms opting for this confidential process must make their registration materials available 15 calendar days before commencing their formal investor roadshow. Anthropic has not commented on the timing of its S-1 filing.
Moving to a public filing would remove a significant procedural barrier for a potential November listing, although the offering's timing may still be influenced by market conditions and other variables. This move would also provide investors with initial insights into the financial aspects and risks associated with one of the AI sector's most rapidly growing firms.
Co-founder and CEO Dario Amodei recently spoke at the Dreamforce 2026 summit in San Francisco. The company has been investing billions in AI infrastructure to develop and operate its Claude models, collaborating with tech giants Google (GOOG, GOOGL) and Amazon (AMZN), and leasing graphics processing unit (GPU) capabilities from SpaceX's Colossus 1 data center.
In the first half of 2026, Anthropic reported revenues of $16.3 billion, yet faced a net loss of over $80 billion, according to a Wall Street Journal report. Analysts expect the company may raise up to $100 billion with a valuation around $2 trillion. Recently, Anthropic informed investors that its revenue increased to $16.8 billion in the third quarter, compared to $11.5 billion in the second quarter, with profitability on an adjusted basis, as noted by the Financial Times.
This substantial offering emerges at a time when this year's robust IPO market is facing increasing difficulties. For instance, shares of South Korean data center provider Elice dropped by 32% on its first trading day after securing $151 million. Additionally, Nvidia-backed Firmus Grid recently abandoned its public listing plans after investors expressed concerns about its proposed valuation, while several other firms have delayed their IPOs due to market conditions.