Largest IPO by market cap in 2026?

What you need to know

This market is asking: which company will go public in 2026 with the biggest total value on its very first day of trading? An IPO — Initial Public Offering — is when a private company sells shares to the public on a stock exchange for the first time. The question is essentially: will SpaceX's stock market debut be worth more than any other company's debut that same year? Right now the three companies in the running are SpaceX, Anthropic, and OpenAI. The winner is whichever company from this list completes an IPO in 2026 and has the highest total value at the close of its first trading day — calculated by multiplying its share price by the total number of shares. The deadline is December 31, 2026. One important edge case: if a company gets acquired by a public company before it can IPO, it is immediately ruled out and resolves No. There's also a quirky tiebreaker: if two companies somehow end the day at exactly the same total value, the one whose name comes first alphabetically wins. None of the provided news headlines relate to SpaceX, Anthropic, OpenAI, or IPO activity in 2026. There isn't relevant recent news to point to here. The kinds of developments worth watching would be any official IPO filing, a confirmed listing date from one of these companies, or news that one of them has been acquired or decided to stay private. The market prices SpaceX at 87%, making this heavily one-sided — the main uncertainty isn't really a two-way debate, it's simply whether something unexpected prevents a SpaceX IPO. SpaceX is a private company controlled by Elon Musk, who has repeatedly said publicly he is in no rush to list it. An IPO requires a deliberate decision, regulatory filings, and the right market conditions — none of which are guaranteed. If SpaceX delays past 2026 or stays private, the entire picture changes, and Anthropic becomes the market's next best guess.

The odds right now

• SpaceX-1.0 pts (1w)87%
• Anthropic+0.4 pts (1w)13%
• OpenAI+0.5 pts (1w)1%
• ByteDance0%
• Stripe0%
• Databricks0%
• SHEIN0%
• Waymo0%
• Revolut0%
• Discord0%
• Perplexity AI0%
• Kraken0%

Price history

How this resolves

Resolves December 31, 2026

This market will resolve to the company that achieves the highest market capitalization in U.S. dollars based on the official closing price on its first trading day in 2026. This market will resolve to a company that completes an Initial Public Offering (IPO) between January 1 and December 31, 2026, 11:59 PM ET. Market capitalization is defined as the total number of outstanding shares multiplied by the closing share price on the first trading day. If two or more companies have exactly equal highest closing market capitalizations, this market will resolve to the company whose listed name comes first alphabetically. Resolution will be based on the primary exchange’s official listing page. In the event that the relevant figure is not displayed, another reliable source will be used. In case the respective company's primary exchange’s official listing page does not report in U.S. dollars, it will be converted to U.S. dollars using the U.S. Federal Reserve Board’s H.10 foreign exchange reference rate for the relevant currency pair on the company’s first trading day (https://www.federalreserve.gov/releases/h10/). If no such rate is available for the relevant trading day, the most recent previously published rate will be used. If the relevant currency is not listed, another credible exchange rate source will be used. A listed company may resolve to "No" as soon as it becomes unable to complete an IPO, including due to acquisition, merger, or absorption by an entity that is already publicly traded. In the event of an interruption in the course of the normal trading session on the respective companies’ first day of trading (e.g., a circuit breaker or half-day), the market will resolve according to the official closing price of the abbreviated session. If no such official closing price is published, the market will resolve according to the next trading day on which an official closing price is published, treating that as the first day of trading for purposes of this market.

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