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 ...

Kirkland features many high-quality products, often produced by familiar name-brand favorites. And perhaps one of the brand's most prized products is its superior-quality canned tuna. The canned ...