Best IPO Stock to Buy and Hold: SpaceX, Anthropic, or OpenAI?

For investors who similar that "new banal smell," this could beryllium the top clip ever. Several of the astir highly anticipated archetypal nationalist offerings (IPOs) successful banal marketplace past person either precocious been conducted oregon are close astir the corner.

Space Exploration Technologies' (NASDAQ: SPCX) IPO connected June 12 lived up to the hype. Anthropic, which developed the almighty Claude AI model, filed a confidential S-1 archetypal registration papers with the U.S. Securities and Exchange Commission (SEC) connected June 1. ChatGPT creator OpenAI submitted its S-1 astir May 22.

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Which of these 3 is the amended IPO banal to bargain and hold? Here's however SpaceX, Anthropic, and OpenAI stack up against each other.

SpaceX: The biggest IPO ever, but an astronomical valuation

SpaceX's IPO terms valued it astatine astir $1.8 trillion. However, the banal soared aft going public. SpaceX's valuation topped $2.4 trillion arsenic of aboriginal trading connected June 19, 2026, making it the sixth-largest institution by marketplace cap.

It's nary astonishment that SpaceX's prospects person excited investors. The company's Starlink portion pioneered the outer net work market. SpaceX dominates the motorboat marketplace with its Falcon 9 rockets. Its Starship conveyance is designed to transport humans to the Moon and Mars.

Much of SpaceX's monolithic estimated full addressable marketplace of $28.5 trillion, though, is related to its xAI artificial quality (AI) business. xAI developed the Grok AI model. It besides has precocious signed mega-deals to supply compute capableness to Anthropic and Alphabet's (NASDAQ: GOOGL) (NASDAQ: GOOGL) Google Cloud.

The large sound against SpaceX, though, is that galore analysts don't deliberation its astronomical valuation is justified based connected its maturation prospects. For example, Morningstar (NASDAQ: MORN) estimates SpaceX's just valuation is astir 66% beneath its existent stock price. There are besides governance concerns, fixed that Elon Musk controls implicit 80% of the company's voting power.

Anthropic: Skyrocketing revenue, but respective question marks

Anthropic was founded successful 2021. Its gross tally complaint reached $14 cardinal by February 2026. As of May 28, 2026, the company's gross tally complaint had topped $47 billion. And Anthropic's valuation neared $1 trillion.

Claude, the ample connection exemplary (LLM) developed by Anthropic, has taken the satellite by storm. It presently ranks arsenic the apical AI exemplary crossed aggregate fronts connected Vellum's LLM Leaderboard. Claude remains the lone frontier AI exemplary that's disposable connected each 3 of the apical unreality platforms.