Duke Energy Named to List of Best Corporate Citizens

March 2, 2010

CHARLOTTE, NC – March 2, 2010 – Duke Energy was named one of Corporate Responsibility (CR) magazine’s 100 Best Corporate Citizens for the second consecutive year.

Duke Energy ranked 43rd on the 2010 list, based on CR’s independent assessment of its performance in seven key areas: environment, climate change, human rights, philanthropy, employee relations, financial and governance.

“This recognition illustrates how doing business in a sustainable way can benefit all of our stakeholders, even in tough economic times,” said Roberta Bowman, Duke Energy senior vice president and chief sustainability officer.

CRO’s 100 Best Corporate Citizens list assesses companies on the Russell 1000® and is the only such list based solely on publicly available information. The list is available at www.thecro.com.

Duke Energy is the third largest electric power holding company in the United States, based on kilowatt-hour sales. Its regulated utility operations serve approximately 4 million customers located in five states – North Carolina, South Carolina, Indiana, Ohio and Kentucky — representing a population of approximately 11 million people. Duke Energy’s commercial power and international business segments operate diverse power generation assets in North America and Latin America, including a growing portfolio of renewable energy assets in the United States.

Duke Energy

Headquartered in Charlotte, N.C., Duke Energy is a Fortune 500 company traded on the New York Stock Exchange under the symbol DUK. More information about the company is available on the Internet at: www.duke-energy.com.