Licensing Executives Society International

The Licensing Executives Society International, or LES International (LESI, or formally "LES International, Inc."), is a not for profit, non-political, umbrella organisation having 32 national and regional member societies, interested in technology transfers or licensing of intellectual property rights. It was founded in 1965 in the United States. As of 2011, LESI had "more than 10,000 individual members, including representatives of companies, scientists, engineers, academicians, governmental officials, lawyers, patent and trademark attorneys, and consultants".

LESI publishes a quarterly journal called les Nouvelles. In 2011, LESI launched an initiative to establish international standards for the valuation of intellectual property.