Swedish oat milk maker Oatly, whose investors include Oprah Winfrey and JAY-Z, has filed documents for an IPO on Wall Street.

Oatly is aiming for a valuation of more than 5 billion dollars (4 billion euros), the company announced on Tuesday.

When the group will go public and how expensive a share will be, has not yet been announced.

Currently, the company is worth $ 2 billion, according to analysts.

Oatly was founded in 1994 by the Swedish brothers Rickard and Björn Öste.

The group sells oat milk in supermarkets, but also has deals with the Starbucks coffee chain, among others.

In recent years, the Swedes have already received a lot of attention from investors.

In July, they raised another 200 million dollars in a capital round to which presenter Winfrey and rapper JAY-Z subscribed.

Rabobank then also took an interest in the company.

Rumors had been going on for some time about an IPO of Oatly.