Reports broke Thursday that talks might be underway.
"We don't comment on any of that stuff if it's speculation," said Mike Hughes, a spokesman for Progress Energy.
Progress shares trade up 1.6 percent Friday at $44.58 per share. On Thursday, shares jumped after the first report about the talks from financial news site DealReporter.com.
Progress closed Thursday at $43.90, up $1.1, but they did peak at $44.48 on the rumor talk.
Duke shares remained flat Friday after falling 4 cents Thursday.
Copyright 2023 by Capitol Broadcasting Company. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.