Two groups, including one backed by China's Fosun, have made competing offers to buy a 40% stake in NMC Health Plc (LSE:NMC) worth up to $1.9 billion, four sources familiar with the deal said. The target stake is jointly owned by the chairman of Abu Dhabi-based investment firm KBBO Group, Khalifa Butti Bin Omeir, UAE-based businessman Saeed Bin Butti Al Qebaisi, and Infinite Investment, a vehicle linked to the two men. However, they may choose to retain at least some of their current holding in the company, the sources said. Neither NMC Health nor KBBO, which is representing the group of Emirati investors, would comment directly on the bids.