Locke Supply Co. was founded in 1955 by Don and Wanda Locke. After Don's death in 2000, the company's employees purchased Locke Supply from the family. Locke Supply has a lock on the HVAC business in Oklahoma City. Through about 160 locations in Arkansas, Kansas, Missouri, Oklahoma, and Texas, the company distributes air-conditioning, heating, plumbing, electrical supplies, and tools. It also sells whirlpool baths and refrigeration equipment. Locke Supply's 300,000-square-foot distribution center holds brands like DeWalt, Bradford White, Eljer, and Armstrong Air.