Simplicity Holdings Limited is an investment holding company that operates casual dining full-service restaurants in Hong Kong. It runs restaurants under the Marsino, 555 Thai Fusion, Grand Avenue, and Baba Nyonya brands, and reports through segments including Chinese, Thai, and Malaysian cuisine, food ingredients and beverages, aircraft engine stand repair and maintenance, and agricultural products. The company also provides aircraft engine stand repair and maintenance, warehouse storage, and logistics services for aircraft engines, as well as agency services for egg sales and wine sales to third parties. Founded in 2003, it is headquartered in Wan Chai, Hong Kong.