This document provides an analysis of the organizations of the NBA and Euroleague Basketball, focusing on their commercialization over time. It begins with a brief history of European basketball club competitions and the creation of Euroleague Basketball in 2000 as a privately owned company. Euroleague Basketball aimed to professionalize and commercialize the top European competition. It discusses Euroleague Basketball's evolution, including gaining control of commercial rights, increasing revenues from sponsors and tickets, and changing competition formats. The document also provides a short history of the NBA and discusses its earlier professionalization and commercialization in North America. It concludes with a comparison of the two organizations, which are now the most important stakeholders in worldwide basketball.