What smart people are saying about Anthropic's IPO paperwork

Anthropic, led by Dario Amodei, filed its S-1 paperwork in Monday. Bloomberg/Getty Images Anthropic is ready to IPO. Analysts and onlookers are weighing in.On Monday, the AI lab filed its hotly anticipated S-1 paperwork. The prospectus offered an inside look at Anthropic's financials: a net loss of about $42 billion in 2025 and revenue of $4.6 billion. It plans to trade under the ticker symbol ANT.The S-1 sets the stage for a blockbuster IPO. Here's what smart people are saying about Anthropic's filing:Sarah Guo, founder of Conviction Conviction founder Sarah Guo said she was interested to see how Anthropic's mission changes (or doesn't) after going public. Big Event Media/Getty Images for HumanX Conference Venture capitalist Sarah Guo opened her X post with a big "CONGRATS" to Anthropic on the S-1 filing.Guo shared her first takeaways: the inflection in operating profit, the focus on novel discovery, the mismatch between consumption-based revenue and long-term compute obligations, and more."I am curious to see how 1) a company with strong mission changes - or doesn't - how it operates under quarterly public inspection and 2) how public opinion may change when retail owns a piece of the upside," Guo wrote.Ann Bordetsky, founder of Elora Capital Ann Bordetsky said that the S-1 set a "(high) bar." Kimberly White/Getty Images for TechCrunch Ann Bordetsky was a partner at New Enterprise Associates' technology practice before founding her own firm, Elora Capital. She wrote on X that the S-1 was a "juicy read."The filing will set "a (high) bar for how capital markets evaluate AI startups," Bordetsky wrote.SemiAnalysisSemiAnalysis, the research firm founded by Dylan Patel, posted the "most mind blowing stat" it had seen in the S-1. It cited Anthropic's raised capital, compared to its cash and investments. Anthropic is "growing at a rapid pace" and "profitable on an operating income basis as of the June quarter," SemiAnalysis wrote."This is likely the most efficient scaling of a business in the history of capitalism," the firm wrote.Brad Gerstner, CEO of Altimeter Capital Altimeter is invested in Anthropic. Gerstner quickly congratulated the team. Mandel NGAN / AFP via Getty Images Brad Gerstner heaped his praise on Anthropic. He congratulated the team on "another important milestone!"Altimeter will partner with Anthropic through "major participation in the IPO on top of our existing ownership," Gerstner wrote. He used an American flag and a rocket emoji.Gerstner's venture capital firm is a longtime investor in Anthropic, co-leading the AI lab's Series H in May.Vivek Gopalan, partner at 8VCVivek Gopalan is an investor at 8VC, the venture capital firm cofounded by Joe Lonsdale. He posted a graph from Anthropic's S-1 showing rising revenue per dollar of compute."You need to believe that this is monotonic and increasing," Gopalan wrote.Dan Shipper, CEO of Every Every CEO joked about Anthropic's doomsaying after the company filed its S-1. Alex Broadway/Sportsfile for Web Summit via Getty Images Dan Shipper had "big news" to share: a joke about Anthropic's ever-present safety focus. He celebrated that the S-1 "doesn't say 'or it might kill / unemploy everyone' in the first paragraph!"The CEO of Every, an AI agent startup, called it a "win for humanity." Read next Business Insider tells the innovative stories you want to know Business Insider tells the innovative stories you want to know Business Insider tells the innovative stories you want to know Business Insider tells the innovative stories you want to know Henry Chandonnet is a senior reporter on the Business News desk. He writes about tech culture, from Silicon Valley's startup class to the everyday AI user. He also closely covers Big Tech and the workplace. Henry previously wrote for Fast Company, where he covered trending tech news. He's written for The Daily Beast, People Magazine, and Vulture.Email Henry at hchandonnet@insider.com, reach him on Signal at henrychand.30, or follow him on X @HenryChandonnet. Anthropic Smart People Say