The Amazon logo on a podium during a press conference in New York.
NEW YORK - Shares of Amazon surged above $1,000 for the first time on Tuesday, marking another milestone in the rise of the American online retail giant.
At about 14.10 GMT, the company's shares were selling at $997.97, up 0.2 percent after earlier getting as high as $1,001.20.
Amazon's market capitalisation stood at about $478-billion, more than twice that of Wal-Mart Stores.
After going in public in May 1997 at $18 a share, Amazon has benefited from tectonic shifts in US technology and consumer shopping habits that are expected to continue to remake the retail industry.
The company has evolved from its origins as an online bookseller into a broad-based retailer of apparel and household staples, from electronics to sausage casing. And with its "Prime" subscription service, it also has become a creative force in Hollywood and beyond.
Amazon shares have appreciated especially rapidly over the last three years in anticipation that e-commerce will become a much bigger force in the retail sector.
Online sales currently comprise about eight percent of the US retail market. Amazon alone accounts for about 43 percent of US online sales, according to consultancy Slice Intelligence.
E-commerce is expected to grow between eight and 12 percent this year, according to the National Retail Federation, about three times as much as the rest of the industry, which has faced massive store and mall closures.
Amazon, whose revenues grew to $35.7-billion in the first quarter, has impressed Wall Street by also laying out a plan to achieve greater profitability.
It is in the process of investing $1.5-billion to establish its own delivery network and lessen its dependence on shipping giants FedEx and UPS. That will help contain delivery costs, which grew 30 percent to $1.9-billion in the first quarter.
The surge above $1,000 a share also raises questions about whether Amazon intends to pursue a stock split. At Amazon's annual meeting a week ago, chief executive Jeff Bezos said the matter was under consideration.
The company had three previous stock splits, in June 1998 and in January and August 1999.