It’s hard to find another single brand that has been so successful in such a dizzying array of categories, from underwear to ...

Costco has delighted fans with its latest Kirkland product and they're flying off the shelves. The warehouse retailer is known for delivering value to its members with its much-loved own-brand ...

There is, however, one category that Kirkland Signature hasn’t been able to crack into, despite Costco’s CEO hoping it would. Costco introduced the Kirkland Signature label in 1995 ...

Costco co-founder Jim Sinegal sat down with The Wall Street Journal to discuss how he built the $86 billion label Kirkland Signature and why he was so reluctant to get into the gasoline business.

Costco's Kirkland Signature is more than just a generic brand — shoppers revere the private label's products with near cult-like adoration. For years, fans have praised hundreds of household ...

Costco co-founder Jim Sinegal sat down with The Wall Street Journal to discuss how he built the $86 billion label Kirkland Signature and why he was so reluctant to get into the gasoline business.

A vocal contingent of parents is bemoaning changes to Costco’s Kirkland Signature diapers after the Issaquah-based wholesale retailer switched manufacturers for the popular item in recent months.