By Juro Osawa 

Alibaba Group Holding Ltd. reported disappointing revenue growth on Thursday, while a senior executive defended the e-commerce giant against Chinese government allegations that it failed to crack down on fakes.

Shares of the Chinese e-commerce giant fell about 6% to $92.58 in premarket trading as the company's revenue of $4.22 billion missed analysts's average forecast of $4.45 billion. Through Wednesday, the stock had risen 45% since its initial public offering price of $68 in September.

Alibaba said the revenue growth from its China retail marketplaces trailed the growth of total business volume.

The company's quarterly results came as Alibaba defends itself against accusations from a powerful Chinese government regulator made on Wednesday that it failed to crack down on the sale of fake goods, bribery and other illegal activity on its platforms.

In a conference call on Thursday, Executive Vice Chairman Joseph Tsai called the allegations "so unfair."

"We have been very vocal about protesting, and we're prepared to file a complaint," he said. Mr. Tsai said Alibaba has spent more than 1 billion yuan (about $160 million) for the past two years to fight fakes and protect consumers.

The accusations came in the form of a white paper posted on Wednesday on the website of the regulator, the State Administration for Industry and Commerce, that was based on discussions between Alibaba executives and government officials in July. He said Alibaba didn't see the white paper prepared by the regulator until it was posted. He said the July meeting was like its other normal meetings with regulators.

The white paper said SAIC officials had delayed the report so that it wouldn't affect Alibaba's September initial public offering in the U.S., which raised $25 billion and was the world's largest.

"I want to make it absolutely clear that Alibaba never requested the SAIC to delay the publication of any report," Mr. Tsai said.

On Thursday, the white paper disappeared from the SAIC's website. An SAIC press representative said she didn't know the reason.

For the December quarter, Alibaba's earnings fell 28% to $964 million, or 37 cents a share. The company attributed much of the drop to $241 million in expenses related to share-based compensation to employees. It also booked a $134 million charge related to financing-related fees from early repayment of debt and faced rising tax expense.

Excluding such items, per-share earnings rose 13% to 81 cents a share. Analysts, on average, were expecting earnings of 75 cents a share, according to Thomson Reuters.

Mobile transactions accounted for 42% of Alibaba's overall transactions, up from 36% in the September quarter and 20% from a year earlier. The number of active users on Alibaba's mobile platforms rose to 265 million in December, up from 217 million in September from 136 million a year ago.

Alibaba's ability to boost revenue from its mobile platforms has been scrutinized as more Chinese Internet users go online from their mobile devices.

Alibaba said that on its China retail marketplaces, gross merchandise volume for the quarter increased 49% and annual active buyers rose 45% year-over-year.

Earlier this week, Yahoo Inc. unveiled a plan to spin off tax-free its nearly $40 billion of holdings in Alibaba. The spinoff is seen giving the Chinese e-commerce giant the chance to buy its own shares at a lower tax rate than if it tried to acquire them now.

Alibaba said Thursday that it had $21.07 billion in cash as of Dec. 31.

Write to Juro Osawa at juro.osawa@wsj.com

Altaba (NASDAQ:AABA)
Historical Stock Chart
From Mar 2024 to Apr 2024 Click Here for more Altaba Charts.
Altaba (NASDAQ:AABA)
Historical Stock Chart
From Apr 2023 to Apr 2024 Click Here for more Altaba Charts.