The Globe and Mail reports in its Tuesday, June 2, edition that artificial intelligence giant Anthropic, which is headquartered in California, has confidentially filed for a U.S. initial public offering, the company said on Monday, edging ahead of rival Microsoft-backed OpenAI in a closely watched race to reach public markets. A Reuters dispatch to The Globe reports that the move sets up an early test of whether investor appetite for artificial intelligence, which has fuelled lofty private valuations and talk of potential trillion-dollar listings, will hold up under public scrutiny, and which company gets to set the template for how the fast-growing sector is valued. Anthropic, which makes agentic coding assistant Claude Code, did not disclose the size or the terms of the offering. It last raised $65-billion (U.S.) at a post-money valuation of $965-billion (U.S.) in late May, putting it ahead of OpenAI. The listing would represent one of the most consequential stock-market debuts in years, potentially reshaping benchmark indexes, investor flows and the broader narrative driving U.S. equities.