Amazon.com Inc.’s second-quarter sales and forecast for the current period fell short of analysts’ expectations, suggesting the biggest online retailer’s rapid growth through the pandemic is waning as people revert to old shopping habits. Shares fell more than 6 percent in extended trading.

The Seattle-based company rallied through the pandemic as shoppers shifted much of their spending from stores to websites. Amazon invested billions on pandemic safety measures to keep operating while minimizing the spread of Covid-19 through its facilities and hiring hundreds of thousands of workers to meet crushing demand. New Chief Executive Officer Andy Jassy, who took the helm from founder Jeff Bezos on July 5, has to show investors he can continue the company’s rapid sales growth and rising profits beneath the heightened scrutiny of regulators in the U.S. and Europe.

Investors overlooked better-than-predicted profits and a strong performance in the quarter from the company’s advertising business and Amazon Web Services cloud unit. Instead, they focused on slowing momentum for its central e-commerce business, said Pedro Palandrani, an analyst at GlobalX.

“The big thing investors are looking at is next quarter guidance came in much lower than expectations,” Palandrani said, adding that Amazon’s results stood out compared with the positive earnings reports issued earlier this week by Microsoft Corp. and other big tech companies.

Even before Amazon’s weak forecast, investors were fretting that the company could lose momentum as people revert to pre-pandemic spending habits like travelling and dining out, which may reduce online shopping.

Revenue will be $106 billion to $112 billion in the period ending in September, the Seattle-based company said Thursday in a statement. Operating profit will be $2.5 billion to $6 billion. Analysts, on average, projected $8.11 billion in profit on sales of $118.7 billion, according to data compiled by Bloomberg.

Second-quarter sales increased 27 percent to $113.1 billion, missing estimates of $115 billion. Profit was $15.12 a share in the period ended June 30, compared with the average estimate of $12.28.

Shares fell to a low of $3,347 in extended trading after closing at $3,599.92. The stock had gained about 11 percent this year through the close.

Bezos remains executive chairman and the exact nature of his new role is a work in progress. Bezos has said he wants to focus his attention on new initiatives, which suggests Jassy will oversee the day-to-day of Amazon’s business. Jassy previously ran Amazon Web Services, its profitable cloud-computing division.

AWS revenue jumped 37 percent in the quarter to $14.8 billion. The company’s “other” revenue category, primarily advertising sales, gained 87 percent to $7.92 billion. Both units topped analysts’ estimates.

Amazon’s gains during the pandemic came from adding more Prime members, who pay monthly or annual fees in exchange for shipping discounts and other perks. Amazon had 153 million Prime members in the U.S. at the end of June, up 25 percent from a year earlier, according to Consumer Intelligence Research Partners. Prime members shop more frequently on Amazon and spend about twice as much on the site as non-Prime members.

Despite big e-commerce investments by competitors that include Walmart, Target and Best Buy, Amazon remains the unrivalled e-commerce leader in the U.S., its biggest market. U.S. shoppers will spend $367 billion on Amazon this year, up 15.3 percent from 2020, according to EMarketer Inc. Amazon’s 40.4 percent share of all online spending in the U.S. is bigger than its next nine competitors combined.

By Spencer Soper

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