Guessing which companies make Kirkland Signature products has become a sport for Costco fans. This time, we're wondering who ...

If you're tired of the same old tuna on your salads and you're looking for a serious canned seafood upgrade, there's one ...

So who is behind Costco's Kirkland Signature tuna? Costco's tuna is actually manufactured by one of the biggest name brands in the canned fish industry: Bumble Bee Tuna. And while Costco sells its ...