Anthropic has not yet gone public, but market participants are already predicting that it could surpass Elon Musk’s SpaceX and become the largest initial public offering of 2026. According to data from the Polymarket platform, Anthropic’s chances of becoming the largest IPO of the year are rapidly narrowing the gap with SpaceX as the company’s revenue growth accelerates ahead of a possible debut in the fourth quarter. According to Bloomberg, Anthropic’s annual revenue in 2026 may exceed $65 billion, up from $47 billion in May. It is noteworthy that OpenAI, Anthropic’s main rival, which may also go public this year, is not listed among the contenders for the largest IPO in Polymarket’s data..

For now, SpaceX holds the crown for the largest offering. The company officially set the stock price at $135 on June 11, offering investors 555.6 million shares, which valued SpaceX at $1.78 trillion. SpaceX’s historic debut on the Nasdaq exchange took place on June 12: trading opened around noon at $150 per share. Amid strong demand from institutional and retail investors, the stock grew steadily throughout the session and closed the first day at $160.95. A growth of nineteen and two‑tenths percent from the offering price instantly brought SpaceX’s market capitalization to two trillion one hundred billion dollars. A few weeks later, the shares reached a peak of about $225, but then fell to lows of about $104 amid investors’ concerns about the expiration of lock‑up periods and capital expenditure plans.

Tom Essey, founder of Sevens Report Research, noted on Yahoo Finance that betting against Elon Musk has repeatedly proven to be a futile endeavor, and in the long term, he remains optimistic about SpaceX, although he warns of the high volatility of the stock. Since then, SpaceX has recovered to $146 per share, which gives it a market capitalization of $1.93 trillion. Anthropic is now valued at approximately $1 trillion, compared to $894 billion for OpenAI, according to Yahoo Finance’s private markets data.