The Costco Kirkland Signature vs national brands competitive dynamic is the most commercially consequential strategic reality in the entire American CPG landscape — and in 2026, with Kirkland generating $90 billion in annual sales and actively expanding into thirty new product categories per quarter, every brand operating in the Costco channel needs a clear, honest, data-grounded strategy for navigating it. This is not a comfortable conversation, and at MOJO Sales & Branding,