Kirkland Signature is now bigger than some of the world’s biggest companies—and it has become essential to Costco’s business.

Costco accepts most returns without time limits, though there are some exceptions. Electronics have a 90-day return window.

Wondering if now is the time to buy Costco? Spoiler alert -- it's very rarely a bad idea to hold this stock for a few years.

Costco’s sales figures led to differing takes from some analysts about whether the retail giant’s stock is too expensive.

Costco has published a list of items from its catalog that have been recalled. Most of these products — which include cough ...

Sign up for a 1-year Costco Executive Membership and get a $40 Digital Shop Card while the StackSocial deal lasts.

KALAMAZOO COUNTY, MI — A Michigan State Police trooper who accidentally shot herself while shopping at Costco was found not ...

Costco works differently.While a traditional supermarket could easily carry 30,000 or more SKUs (stock keeping units) at a ...

Costco has recalled nearly a dozen products in the past several months. Find out which products are affected and how long you ...

According to research from The Motley Fool, Costco is currently the second-biggest consumer staples company by market cap, ...

Costco has added a major bonus to its Executive Membership as of June 30. The giant added an exclusive shopping window for ...

Rising prices stressing you out? Me too. Follow these simple dos and don’ts, and you might become a bulk-buying evangelist ...