Citigroup has appointed Ashu Khullar to partner with Anthony Diamandakis as co-heads of global asset managers, according to an internal memo seen by Reuters on Wednesday. Khullar, currently serving as India subcontinent sub-cluster & banking head, will relocate to London to spearhead the expansion of Citi's sponsor relationships across EMEA and Asia. K. Balasubramanian will take over Khullar's previous role, pending regulatory approval from the Reserve Bank of India.