Updated Thu, May 21 2026 4:28 PM EDT CREATE FREE ACCOUNT A SpaceX Falcon 9 rocket is displayed outside a Space Exploration Technologies Corp. facility in Hawthorne, California, on March 26, 2026. Patrick T. Fallon | Afp | Getty Images A slew of tech mega-IPOs are ahead and traders expect they'll push Warren Buffett aside on their first day of trading. SpaceX on Wednesday officially filed to go public on the Nasdaq. On the same day, reports circulated that OpenAI will file for an IPO confidentially as soon as Friday. After the OpenAI reports, traders on prediction market platform Kalshi now see a 92% chance that the ChatGPT owner files for an IPO this year. Traders also think its chief private rival, Anthropic, has 69% odds it will officially go public this year. And according to traders on Polymarket, all are expected to trade on their first days at valuations north of $1 trillion, which would be records for a public debut. SpaceX was valued at $1.25 trillion in February, and Polymarket traders think there's a 56% chance it closes its first trading day above $2.2 trillion. OpenAI was last valued at $852 billion, and traders think there's a 65% chance it ends its first public trading day above $1.4 trillion. Meanwhile, traders place 47% odds that Anthropic on its first day of public trading will close above $1.8 trillion. The company reportedly is in talks for a new funding round at a $900 billion valuation. Those valuations would place the companies firmly in the $1 trillion club, and likely above Berkshire Hathaway's market cap, currently at $1.03 trillion. They'd even challenge Meta