Established in 1932, Lansdale, Penn.-based M.H. Zeigler & Sons is the largest producer of apple cider and apple-based juices in the United States. The company markets its products under several brands, including Zeigler's branded, private label and house brands. The company sells its products in 30 states. Since 2000, M.H. Zeigler & Sons has been owned by North Castle Partners, an investment firm in Greenwich, Conn., specializing in the healthy living and aging sector. North Castle Partners, which also has an office in San Francisco, invests in companies that provide products and services promoting healthy living and aging.