Stocks Rise as a Major AI Company Makes Its IPO Paperwork Public
U.S. stocks rose on Monday, Oct. 26, 2026, as investors read through the initial public offering (IPO) filing of Anthropic PBC, Bloomberg reported.
An IPO is when a private company sells shares to the public for the first time. Anthropic's registration document, called the S-1, is now public. WSJ's live coverage of the day listed the filing as one of its main stories. The same coverage tracked the Dow, the S&P 500 and the Nasdaq, under the headline "Stock Market Today: Nasdaq, Dow Move Higher."
The number to focus on is the size of the planned offering. The Wall Street Journal's explainer on the planned listing says the IPO could raise up to $100 billion and value the company at around $2 trillion.
Both figures are upper limits and estimates. Neither is a final price. If the raise and the valuation both landed at those levels, the sale would be roughly 5% of the company's shares. That gives a sense of how much stock the market would have to absorb.
The S-1 should contain the real terms, including the number of shares and how the money will be used. Those details will be read closely once they are public.
Meta's move points the same way. Meta, the parent company of Facebook, said it would look to raise up to $95 billion to help fund investments in artificial-intelligence infrastructure, meaning the data centers and computer chips that AI runs on.
That is a stated intention, not a completed financing. The word "up to" leaves the final amount open. Placed next to the Anthropic figures, though, it gives a rough sense of how much outside money the AI build-out is asking for in a single year.
For professional traders at banks and funds, the question is less about any one deal. It is whether all the new stocks and bonds from large AI companies start competing for the same pool of investor money.
For ordinary savers, the link runs through index funds and retirement accounts. An index fund holds a set list of companies, such as those in the S&P 500. Large AI companies carry a lot of weight in those lists, so big stock sales can change how the indexes behave.
A new listing also tends to join index lists and industry groups over time, though the exact rules and timing vary.
In my view, both headline numbers deserve caution. A $2 trillion valuation depends on pricing, demand and the final prospectus, and none of those exist yet. The $95 billion plan depends on market conditions when the company acts on it. Neither the upper limits nor one day's index moves tell you much about the months ahead.
What Monday did establish is narrower. An AI company's IPO paperwork is now public, and a large platform company has put a ceiling on how much it may raise. The details in the filings will decide how well those numbers hold up.
