Where
Costco records added to the index
The wash is where US retail is opening overall. The dots are the records the index added for this brand, which are not all store openings — drag the timeline to watch them land.
The full report finds the trade areas that look like the ones Costco already wins in — demographics, co-tenancy, traffic.
US locations
As of Q3 2026
Includes department and facility records, not distinct stores — the index files a chain's pharmacy, fuel, optical, service and charging points as separate locations.
The index files Costco's departments and facilities as separate records — pharmacy, fuel, optical, service and charging points each count as a location — so the record count above is not a store count. Net new stores, growth and the quarterly verdict are withheld rather than published in a unit they were not measured in.
Costco
Indexed to 100 at the first quarter — the shape is the growth rate, not the store count.
Rankings
The fastest-growing chains in Discount & Value
Ranked by acceleration — opening faster now than they were a year ago.
Costco is not placed in this ranking: its index records are departments and facilities rather than distinct stores, so its counts are not comparable with chains measured in storefronts.
Rankings exclude companies whose entire rise lands in a single quarter — that pattern is a change in data coverage, not expansion.
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Click any company to compare it against Costco — the chart, the metric table and the link at the bottom of this page all follow.
Compare
Costco against anyone
Indexed to 100 at the first quarter, so a 300-store chain and a 3,000-store chain are the same shape. Costco plus up to 4 others.
Knowing how fast Costco is growing is half of it. The other half is where they should open next.
We'll find the trade areas that look like the ones Costco already wins in — demographics, co-tenancy, traffic, and the specific neighbourhoods that match.