'Big Short' investor Michael Burry says neither SpaceX nor Anthropic is worth $1 trillion

Michael Burry took aim at SpaceX and Anthropic's valuations on his Substack.

The "Big Short" investor said SpaceX's IPO filing doesn't support a $1 or $2 trillion price tag.

Burry said Claude-maker Anthropic might never be worth $1 trillion as he expects demand to cool.

Michael Burry says he has major doubts about SpaceX and Anthropic's lofty valuations.

In recent discussion threads on his Substack, the investor of "The Big Short" fame questioned the worth of Elon Musk's rocket, satellite, and AI company, and the maker of popular AI model Claude .

"Any move up will be on hype and technicals," Burry wrote about SpaceX stock in a subscriber chat he started on Saturday. "Nothing in that S-1 suggests it is worth $1 trillion let alone $2 trillion."

SpaceX filed an IPO prospectus known as an S-1 on May 20, revealing that last year it made $18.7 billion in revenue and posted a net loss of $4.9 billion. It is widely reported to be targeting a valuation of roughly $2 trillion as a public company.

Anthropic announced last Thursday that it had raised capital at a $965 billion valuation , paving the way for a public listing at an even higher valuation.