Kirkland Signature

Kirkland Signature is the private label of Costco Wholesale Corporation, a US public company (NASDAQ: COST) incorporated in Washington State and headquartered in Issaquah, WA, per its FY2025 Form 10-K on file with the SEC. Costco Wholesale Canada Ltd. (Corporation No. 891534-2), registered office 415 West Hunt Club Road, Ottawa, ON, is an active Canadian-registered operating subsidiary under the Canada Business Corporations Act, not the ultimate parent, so profit from Kirkland Signature sales in Canada flows to the US parent.

• cost-20250831 filing “NASDAQ Global Select Market under the symbol “COST.””
• Federal corporation information - 891534-2 - Online Filing Centre - Corporations Canada - Corporations - Innovation, Science and Economic Development Canada registry “Registered office address 415 WEST HUNT CLUB ROAD OTTAWA ON K2E 1C5 Canada”

Costco does not disclose which contract manufacturers make Kirkland Signature products or where; its own brand page says only that it "partners with top manufacturers around the world." Canada's dairy and egg supply management system imposes tariffs above 168% (eggs) to over 300% (butter) once import quota is exceeded, so Kirkland Signature milk, butter, cheese, and egg products sold in Canada must be made domestically. The rest of the wide portfolio (frozen, bakery, meat and deli, pantry, snacks, baby, cleaning) is estimated as majority US-made, reflecting Costco's integrated North American supply chain and US ownership, with a smaller share from overseas contract manufacturers typical of private-label household, baby, and packaged snack goods, and a small EU share for imported specialty pantry items. No line-by-line manufacturer disclosure exists to verify this split.

• Dairy and poultry supply management in Canada - Wikipedia other “in Canada imports face prohibitive tariffs such as 168% for eggs, 285% for chicken, 246% for cheese and over 300% for butter.”
• Kirkland Signature | Costco vendor_statement “partnering with top manufacturers around the world, we’ve created an exclusive range of products”

The Canadian business is run by Costco Wholesale Canada Ltd., a federally registered corporation with its registered office and named directors in Ottawa, ON, operating warehouses across Canada. LinkedIn lists 4,164 employees under the Costco Wholesale Canada entity, and the vendor's own About Us page says it serves over 10 million members across Canada as one of the country's largest retailers. No Canadian-facing corporate or retail function is described as based outside Canada.

• Federal corporation information - 891534-2 - Online Filing Centre - Corporations Canada - Corporations - Innovation, Science and Economic Development Canada registry “Registered office address 415 WEST HUNT CLUB ROAD OTTAWA ON K2E 1C5 Canada”
• Costco Wholesale Canada | LinkedIn other “4,164 employees”
• About Us | Costco vendor_statement “Costco serves more than 10 million members across Canada, and is one of the nation’s largest retailers, averaging CDN$25 billion in sales per year.”

Ingredients follow the same supply-managed pattern as manufacturing: Canadian milk and eggs are required inputs for Kirkland Signature dairy and egg lines. The wider pantry, snacks, frozen, and baby portfolio is estimated to draw heavily on US-grown wheat, corn, and produce given Costco's cross-border supply chain, while coffee, cocoa, sugar cane, tropical fruit, and imported oils used in Kirkland Signature snacks and pantry items count OTHER since none are grown commercially in Canada or the US. No vendor disclosure names specific input origins for individual products, so this is an estimate.

• Dairy and poultry supply management in Canada - Wikipedia other “in Canada imports face prohibitive tariffs such as 168% for eggs, 285% for chicken, 246% for cheese and over 300% for butter.”