Kastra International Company Limited is a subsidiary of Pathomsak Holdings Company Limited (PHC), an investment holding company of the Pathomsak family. Kastra’s core business focuses on creating precious jewelry and marketing them internationally, whilst the other line of the business is dealing with strategic investment in lifestyle businesses. Kastra’s parent company, Pathomsak Holdings, engages in a wide array of businesses ranging from hotel, property development, travel, and financial services.