Stater Bros Markets is a privately-owned supermarket chain based in San Bernardino, California. The company was founded in 1936 by twin brothers Cleo and Leo Stater, and it has since grown to become one of Southern California's largest privately held companies.

Stater Bros Markets operates over 170 supermarkets throughout Southern California, and the company is known for its commitment to quality products and customer service. The stores offer a wide selection of groceries, including fresh produce, meat and poultry, dairy products, and bakery items. They also have an in-house pharmacy and offer a range of household and personal care products.

Stater Bros Markets is dedicated to being a good corporate citizen and supporting the communities it serves. The company has a long history of charitable giving and community involvement, and it has donated millions of dollars to local charities and organizations over the years.