Wealthy Americans choose one grocery store chain over rivals, survey finds

Costco was the grocery retailer where the largest share of higher-income Americans reported doing most of their grocery shopping, according to a recent YouGov survey.

Eleven percent of respondents earning at least $150,000 a year said Costco was their primary grocery store. Fourteen percent selected "other," while Kroger followed at 10% and Walmart Supercenter at 8%.

The warehouse retailer, known for its bulk goods and discounted prices, topped the rankings despite requiring shoppers to pay an annual membership fee.