Glanbia plc Glanbia plc is a global nutrition company that manufactures and markets sports nutrition, lifestyle nutrition, and functional ingredients. The company operates through three main divisions: Glanbia Performance Nutrition, which offers sports and active lifestyle products including protein powders, ready-to-drink shakes, bars, and snacks under brands such as Optimum Nutrition, BSN, Isopure, thinkThin, and SlimFast; Glanbia Nutritionals, which provides dairy-based and non-dairy nutritional ingredients, cheese, vitamin and mineral premixes, flavors, and customized solutions for food, beverage, health, and wellness applications; and Joint Ventures, which include cheese production partnerships. Glanbia plc , founded in 1997 and headquartered in Kilkenny, Ireland, maintains significant operations in North America, Europe, Asia-Pacific, Latin America, and the Middle East, serving consumer, food and beverage, and health industries through retail, e-commerce, gyms, and business-to-business channels. Recent developments include the 2023 acquisition of Flavor Producers for $355 million to bolster organic and natural flavors capabilities in Nutritional Solutions; the 2022 acquisition of Sterling Technology; the completed sale of its 40% stake in Glanbia Ireland (now Tirlán) to Glanbia Co-operative Society Limited in April 2022; a planned 2025 restructuring of its nutritionals business; and ongoing pursuit of targeted acquisitions as stated in November 2025.