(Reuters) - Billionaire investor Carl Icahn, one of the largest shareholders in natural gas producer Chesapeake Energy Corp , has raised his stake in the embattled company to 8.9 percent, a regulatory filing shows.

Icahn earlier reported a 7.56 percent stake in the company.

Along with investor Mason Hawkins, Icahn controls the company's nine-member board of directors.

(Reporting by Swetha Gopinath in Bangalore; Editing by Maju Samuel)