NEW YORK - Renren.com, China's largest social-networking service, is seeking to capitalize on strong demand for the nation's Internet stocks with an initial public offering in the United States.

Renren is preparing an IPO of about $500 million this year, according to three people with knowledge of the plan. The banks handling the offering are Morgan Stanley, Deutsche Bank AG and Credit Suisse Group AG, according to the people, who declined to be identified because the matter isn't public. The offering could come by June, two of the people said.

"It's good timing to go for a listing," said Jim Tang, a telecommunications analyst at Shenyin Wanguo Securities Co in Shanghai. "It definitely will be able to lure many international investors. It should be using the IPO proceeds to develop and promote its technology and products."

Renren has more than 160 million registered users, according to Analysys International in Beijing. It could use the IPO proceeds to woo more visitors as it competes with local rivals Tencent Holdings Ltd and Baidu Inc in the world's most-populous nation. Renren - which means "everyone" in Chinese - has similar features as Facebook Inc.

No US social-networking sites have gone public, even as their popularity and advertising revenue soar. That's created pent-up demand among investors. LinkedIn Corp, which announced plans last month to raise $175 million in an IPO, could become the first to list.

Shares of Hong Kong-listed Tencent, China's biggest Internet company, have risen 23 percent to HK$208.20 ($26.74) this year. US-listed Baidu, which is the nation's second-largest Internet company, jumped 31 percent to $126.80.

At Renren, advertising has more than doubled each year since the site started selling space in 2008, the company said in a statement. The online advertising market will triple to almost $13 billion in China by 2014, estimates Susquehanna International Group LLP.

Lillian Wang, a public-relations manager at Renren in Beijing, didn't immediately return calls to her office and mobile phone seeking comment.

Pen Pendleton, a spokesman for Morgan Stanley, declined to comment, as did Credit Suisse's Duncan King. Deutsche Bank's Scott Helfman didn't immediately respond to a request for comment.

Renren traces its roots back to 2005, when graduates of Tsinghua University in Beijing founded Xiaonei.com. That was the year after Mark Zuckerberg, chief executive officer of Facebook, created his service for fellow Harvard University students.

In 2006, Xiaonei was acquired by closely held Oak Pacific Interactive Corp, which changed the name of the service to Renren in 2009. Softbank Corp, Japan's fastest-growing mobile phone carrier, is the biggest shareholder in Beijing-based Oak Pacific.

Facebook, the world's biggest social-networking site, will start reporting financial results by April 2012, even if it doesn't go public, according to a document sent to prospective investors.

The company would be forced to make disclosures because it expects to have at least 500 shareholders by the end of this year, a threshold that makes reporting results necessary under US Securities and Exchange Commission rules, said a person who reviewed the document.

Bloomberg News