Let's start with a number that should stop every brand owner in their tracks: $90 billion. That is how much Kirkland Signature — Costco's private label brand — generated in sales in 2025 alone. According to a report given at Costco's 2026 Annual Meeting of Shareholders, the Kirkland Signature brand brought in about $90 billion in sales in 2025 — more than a $15 billion increase compared to Kirkland Signature sales in 2024. Julee Ho Media Let that sink in. A single private lab