Shares in electric vehicle firm Rivian are set to start trading in New York of US on Wednesday, after raising more than $11.9bn (£8.8bn) from investors.
That's as the shares were priced at $78 each, well above the company's target range.
Yet Rivian only started delivering its first electric pick-up trucks to customers in September.
And the California-based start-up has made losses of over $2bn over the last two years.
But the van and truck maker has drawn significant investor interest, in part because it already has the backing of online giant Amazon.