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At 0.90, Costco Gasoline is the strongest pull in Costco Pharmacy's top 10 — a gas station, not another pharmacy or drugstore. That gap between the top neighbor and the rest of the field defines the two-peak shape here: one cluster anchored by Costco-ecosystem entities, a second by mainstream retail and dining.
The first peak groups Costco Gasoline (0.90), Costco (0.86), and Costco Optical (0.85) — all Costco-affiliated properties, suggesting the audience is shaped heavily by membership behavior rather than pharmacy-seeking specifically. The second peak is broader: Target (0.89) and Movies & Theaters (0.89) sit nearly as high as the top neighbor, followed by Sprouts Farmers Market (0.86) and BJ's Restaurants (0.86). This second cluster spans Big Box Retailers, General Grocery Stores, and Casual Dining — a suburban errand-and-leisure pattern rather than a health-focused one.
Notably, no other Pharmacies and Drugstores subcategory entity appears in the top 10. The neighbors are drawn from eight distinct subcategories — Gas Stations, Big Box Retailers, Movies and Theaters, General Grocery Stores, Casual Dining, Eyewear, Juice and Smoothies, and Beauty Salons and Spas — none of which share Costco Pharmacy's own subcategory. The audience shape here is defined almost entirely by cross-kind overlap.
This pattern suggests Costco Pharmacy's audience is structured around the broader Costco membership footprint and suburban multi-stop shopping behavior, not around pharmacy or healthcare affinity as a standalone signal.
