May 3- Duke Energy Corp, the largest power provider in the United States, reported a lower-than-expected quarterly profit on Friday, citing weak electricity demand and higher costs at two key units. Duke operates an international power supply business, primarily in South America, but the United States is its largest market.
Feb 13- Duke Energy Corp reported its second consecutive quarterly rise in profit on Wednesday following its acquisition of rival Progress Energy last summer. The largest power company in the United States said net income for the fourth quarter was $586 million, or 62 cents per share, compared with $333 million, or 65 cents per share, a year earlier.
Feb 5- Duke Energy Corp, the biggest power company in the United States, said Tuesday its Progress Energy Florida utility will retire the Crystal River nuclear plant in Florida. The company said it is evaluating potential sites for new plant capacity that may be needed in the future to meet Florida customer needs.