Online scrapbook company Pinterest jumped 28% in its debut on the New York Stock Exchange.
The shares opened at $23.75, ahead of the $19 they were priced at, and they closed at $24.40.
It values the company at about €16 billion dollars.
Pinterest is an online scrapbook where users save ideas for clothes, décor and recipes.
The company earns money through advertisements, which are placed among the "pins" or posts that users upload on the site.
Its flotation comes before the widely-anticipated stock market debut of ride-hailing app Uber next month.