CHICAGO (

TheStreet

) -- Executives at daily deal site

Groupon

remain committed to going public but are unsure about the timing,

The Wall Street Journal

reported, citing a person familiar with the matter.

Federal regulators have been examining the company's initial public offering documents more aggressively than expected, and the volatility in the stock market is holding the company back from introducing its stock, the person told the newspaper.

The company's major shareholders, including

Capital Group

,

T-Rowe Price

,

Fidelity Investments

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and

Morgan Stanley Investment Management

, all have indicated they remain interested in the stock, the person said.

On Friday, Groupon amended its offering filing to reduce reported revenue for 2010 to $312.9 million from $713.4 million. The filing also included parts of a letter written by CEO Andrew Mason to employees earlier this month that talked of the company's success. The letter was immediately leaked to the press, which could be seen as a violation of

Securities and Exchange Commission

rules that a company can't make public statements about its stock during the IPO process, the

Journal

reported.

The SEC could require a "cooling off period" for Groupon that could delay its IPO further, according to two people familiar with the matter.

-- Written by Joseph Woelfel

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Joseph Woelfel

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