Arcapita and Bahrain Mumtalakat Holding Company have partnered to acquire an approximately 90% stake in NAS United Healthcare Services (NAS). Arcapita is a global Shari'ah compliant alternative investment manager. Mumtalakat is the sovereign wealth fund of the Kingdom of Bahrain. Abu Dhabi-based NAS is a regional leader in the provision of third-party administrator services to more than 40 health insurance and takaful companies in the Arabian Gulf. NAS services a pool of more than 500,000 insured members and processes more than 3 million medical claims per year. The market for outsourced medical claims management in the GCC region is expected to grow significantly. Most GCC governments have either implemented mandatory healthcare insurance coverage or plan to launch initiatives in the next 2 to 3 years.