LG&E and Kentucky Utilities are reportedly for sale and Duke Energy is one of the top bidders.
The New York Times reports the bid could be as much as $6 billion.
E-on, a European company has owned LG&E and Kentucky Utilities since 2002.
LG&E is e-on's U.S. headquarters. The Louisville Utility and Kentucky Utilities, which serves Lexington and other nearby counties, employ a total of 3000 workers.
LG&E and Kentucky Utilities have more than 900,000 customers, almost all of them in Kentucky.
When we reached a spokesperson tonight, she said she could neither confirm nor deny the reports.
The mayor's office said it has not been told of anything pending with LG&E.