LES International (LESI) is a global business association made up of 33 national and regional societies, representing more than 6,500 individual members in more than 90 countries, all involved in the licensing, transfer and management of intellectual property rights. Individual members include management representatives from large, medium and small companies, scientists, engineers, academics, governmental officials, lawyers, patent and trademark attorneys, and consultants.

LESI publishes a quarterly journal, les Nouvelles, hosts international, regional and national conferences throughout the year, conducts educational programs, such as licensing courses, seminars and workshops, and provides many opportunities for networking and professional development.