A number of LightSquared debt holders have banded together to negotiate with the wholesale operator’s hedge fund owner, Phillip Falcone’s Harbinger Capital Partners, in crunch bankruptcy talks, reports Reuters. According to sources, the creditors' group includes billionaire activist investor Carl Icahn, hedge fund manager David Tepper and investment firms Fortress Investment Group and Capital Research, which own some of the US$1.6 billion loaned to LightSquared to fund its planned launch. LightSquared is facing a 30 April deadline to renegotiate the terms of the loan in order to head off a potential default that would spur a bankruptcy filing.