James D. Sinegal is an American billionaire businessman and the co-founder and former CEO of the Costco Wholesale Corporation, an international retail chain. He served as Costco's president and CEO from 1983 until 2011. As CEO of Costco, Sinegal was known for his hands-on humanitarian approach to business, which he learned from his mentor, Sol Price. He prioritized customer and employee satisfaction over shareholder interests and is also known for his philanthropic efforts.

Costco Wholesale Corporation is an American multinational corporation which operates a chain of membership-only big-box warehouse club retail stores. As of 2021, Costco is the third-largest retailer in the world and is the world's largest retailer of choice and prime beef, organic foods, rotisserie chicken, and wine as of 2016. Costco is ranked #11 on the Fortune 500 rankings of the largest United States corporations by total revenue. Costco uses a club warehouse wholesale retailer channel of distribution while also selling their private label brand directly to consumers.