Abu Dhabi's Mubadala Investment Co. is opening up one of its largest investment Dusinesses to outside investors for the first time, betting on its ability to attract nstitutional capital as demand for alternative lending rises. The wealth fund is transferring a $25 billion credit portfolio to its alternative asset manager Mubadala Capital under a long-term management agreement that will allow the platform to raise third-party capital for the first time. Mubadala will commit an additional $4.65 billion to support expansion.