Anthropic has submitted paperwork for an initial public offering, drawing attention from the artificial intelligence industry and investors. Despite a massive net loss, its fast-rising revenue and the potential to improve computing efficiency are in focus. Some analysts say the listing will be a test case for valuing AI companies.

Business Insider reported on Oct. 26 that Anthropic has filed an S-1 and entered the listing process. The company disclosed a net loss of about $42.0 billion in 2025 and revenue of $4.6 billion in the filing. It plans to use the ticker symbol ANT.

The filing offered a relatively detailed first look at Anthropic's financial structure and growth pace. The key is that revenue is rising quickly despite large losses, and some investors are focusing on signals of improving profitability on an operating profit basis. That is also why some see the deal as potentially large.

Venture capitalist Sarah Guo (사라 궈) posted a congratulatory message shortly after the S-1 was filed and pointed to several issues. She said she focused on an inflection point in operating profit, a focus on new discoveries, and a mismatch between usage-based revenue and long-term computing obligations. She added she was curious whether a company that has put forward a strong mission would change how it operates under the quarterly-results scrutiny of public markets, and how sentiment might shift when retail investors hold some of the upside.

Market participants see the filing as potentially influencing yardsticks for AI company listings. Ann Bordetsky (앤 보르데츠키), a former technology-sector partner at New Enterprise Associates, described the S-1 as "a lot to read" and wrote that capital markets would set a high bar for valuing AI startups.

Research firm Semianalysis cited the scale of fundraising and the comparison with cash and investment assets as the most surprising figures in the filing. Semianalysis noted that Anthropic is growing rapidly and posted a profit on an operating profit basis for the June quarter. It also assessed that the company's expansion method could be the most efficient business scaling in the history of capitalism.

The willingness of existing investors to participate was also confirmed. Brad Gerstner (브래드 거스트너) congratulated the company, saying "the Anthropic team has set another important milestone," and said Altimeter would participate heavily in the IPO in addition to holding an existing stake. Altimeter is a long-term investor that co-led Anthropic's Series H investment round in May.

Investor Vivek Gopalan (비벡 고팔란) highlighted a trend in S-1 charts showing revenue per $1 of computing rising. He wrote that one must believe this metric will continue to increase monotonically. That suggests AI companies' growth prospects are being judged not only by revenue expansion but also by improvements in the efficiency of computing resources.

Some reactions, meanwhile, referred to Anthropic's distinctive corporate image. Dan Shipper (댄 시퍼), chief executive of AI agent startup Every, joked that the first paragraph of the S-1 did not include a phrase about being able to kill everyone or eliminate jobs, echoing Anthropic's long-emphasised safety message. He also called the listing a victory for humanity.

Anthropic's listing preparations are expected to be a test for how AI companies will be evaluated in public markets beyond the private investment market. With fast revenue growth, massive net losses, long-term computing cost burdens and existing investors' intent to add participation all laid out, attention is on which items investors will weigh more heavily during the offering process.