By Kimberly Chin

Oatly Group AB has formally filed paperwork Monday for an initial public offering in the U.S., nine months after private-equity giant Blackstone Group Inc. and a handful high-profile celebrities took a stake in the oat milk producer.

The Malmö, Sweden-based company entered the U.S. market in 2017 with its alternative dairy products that have grown in popularity among consumers seeking healthier options with less impact on the environment.

Last July, The Wall Street Journal reported the company had sold a $200 million stake to a group led by Blackstone and included Oprah Winfrey, Natalie Portman, former Starbucks Corp. chief Howard Schultz and the entertainment company founded by Jay-Z. The sale of the roughly 10% stake valued Oatly at about $2 billion. In February, the oat-milk maker confidentially filed for an IPO in the U.S.

The retail value of the plant-based dairy industry in the Americas is expected to hit $7 billion by 2025, according to Euromonitor.

The growing appetite for plant-based alternatives has put pressure on dairy-milk companies like Dean Foods Co., which filed for bankruptcy in 2019. Meanwhile, companies focused on plant-based alternatives have seen demand from consumers and investors alike take off in recent years. For example, shares of plant-based food maker Beyond Meat Inc. have increased 441% since it went public in 2019.

As part of the filing on Monday, the company said it had revenue of $421.4 million in 2020, compared with $204 million in 2019. Its losses for the year, however, widened to $60.4 million, compared with $35.6 million a year earlier.

Oatly plans to raise $100 million from a sale of its American depositary shares, a placeholder figure companies often use to calculate filing fees and is often changed. It didn't disclose how many ADS it intends to offer to the public, according to registration documents filed with the Securities and Exchange Commission on Monday.

The company plans to list its ADS on the Nasdaq Stock Market under the symbol OTLY.

The company, which was founded in 1994, launched its first oat milk product under the brand Oatly in 2001. Oatly says the process of making oat milk, which involves steeping oats in water, consumes less water than making almond milk. In addition to oat milk, the company makes products such as ice cream, yogurt and spreads.

Oatly plans to use the proceeds from the offering for working capital and to invest in its growth and other general corporate purposes.

Write to Kimberly Chin at kimberly.chin@wsj.com

(END) Dow Jones Newswires

04-19-21 1916ET