Cleary Gottlieb Steen & Hamilton and Sullivan & Cromwell are among a clutch of U.S. firms to have claimed advisory roles on a major finance deal that will see sovereign funds totaling $12.5 billion dispensed to U.S. banking giant Citigroup.

Cleary and Sullivan acted as counsel to Citigroup, which has raised $12.5 billion through private placements with investors including the investment arms of the Singapore and Kuwaiti governments.