William Glenn Arnold founded Arnold Ford in Boulder in 1923. His sons William Jr., Sandy and Pat purchased it and remained in business as Arnold Bros. Motor Company for 55 years.

The Arnold family is more than a local business. They are founding organizational members, fundraisers and elected representatives for Boulder and the State of Colorado. William Jr. is benevolent in numerous community organizations including, Jaycees, YMCA, Jr. Achievement, CU, Mental Health, Water Conservation and financial drives for hospitals and the United Way, and is actively committed to his Christian faith.