Private Label Manufacturers Association: The Private Label Manufacturers Association is a non-profit organization founded in 1979 to promote store brands. It is the only trade group of its kind, representing 4,500 member companies in more than 75 countries. In addition to annual, industry-defining trade shows in Chicago and Amsterdam, PLMA offers its members conferences, executive education, professional development, market research, category and channel sales data, consumer surveys, and publications.