Allegion plc is an American Irish-domiciled provider of security products for homes and businesses. Though it comprises thirty-one global brands, including CISA, Interflex, LCN, Schlage and Von Duprin, the company operates through two main sections: Allegion International and Allegion Americas. The company employs around 12,000 people, sells its products in more than 130 countries across the world and in 2022 generated revenues of US$3.27 billion. It is part of the S&P 500 and headquartered in Dublin. Wikipedia