A sign marks the location of Groupon headquarters in Chicago, Illinois. The US coupon deals website will likely pick Goldman Sachs Group and Morgan Stanley to be principal underwriters for its public offering later in the year, valuing the company at up to $20 billion, according to the Wall Street Journal.

US coupon deals website Groupon will likely pick Goldman Sachs Group and Morgan Stanley to be principal underwriters for its public offering later in the year, valuing the company at up to $20 billion, the Wall Street Journal said.

Groupon may be planning to raise as much as $1 billion from its initial public offer, reported the Journal, citing people close to the matter.

The IPO is likely later in 2011, possibly in the third quarter, according to the financial daily.

Last month the New York Times reported that a possible could value the company at close to $25 billion.

Founded in 2008, the Chicago-based offers discounts to its members on retail goods and services, offering one localized deal a day.

The company announced in January it had raised $950 million in a month to invest in technology, fund its global expansion and compensate company employees and early investors.

The company said then that its subscriber base had grown to 50 million from just two million at the beginning of 2010.