Glanbia Plc engages in the manufacture and distribution of dairy and nutritional ingredients. It operates through the following segments: Glanbia Performance Nutrition, Glanbia Nutritionals, Dairy Ireland, and Joint Ventures and Associates. The Glanbia Performance Nutrition segment comprises of performance nutrition products under the Optimum Nutrition, BSN, Isopure, Nutramino, and ABB brands. The Glanbia Nutritionals segment manufactures and sells cheese, dairy, and non-dairy nutritional ingredients and vitamin and mineral premixes. The Dairy Ireland segment consists of consumer products and agribusiness. The Joint Ventures and Associates segment covers Glanbia Ingredients Ireland, Glanbia Cheese, and Southwest Cheese. The company was founded in 1997 and is headquartered in Kilkenny, Ireland.