North Castle Partners is a private equity firm founded in 1997 and headquartered in Greenwich, Connecticut. The firm specializes in investing in consumer-driven product and service businesses that promote healthy, active, and sustainable living. With nearly two decades of experience, North Castle Partners focuses on sectors such as beauty and personal care, consumer health, fitness, recreation and sports, home and leisure, and nutrition.

The firm's investment strategy involves partnering with management teams to unlock the full potential of companies, emphasizing trust-based relationships and shared values. Notable portfolio companies include Barry's Bootcamp, SmartyPants Vitamins, HydroMassage, and Turnbridge. In 2019, North Castle Partners closed its seventh fund, NCP VII, at a hard cap of $400 million, underscoring its commitment to supporting entrepreneurs in the healthy living market.