15 August 2014
Last updated at 13:07 GMT
Viridian, the Belfast-based energy company, has said it has made no decision on a stock market flotation.
The financial news agency Reuters had said the firm was preparing for a flotation, likely to be in London.
Viridian controls the electricity supply firm Power NI, as well as the Huntstown power station in County Dublin.
The firm is currently owned by Arcapita, a Bahrain-based bank.
Viridian said: “We have made no decision to proceed with an Initial Public Offering (IPO).”
Reuters reported that Arcapita had hired the investment bank JP Morgan to lead the share listing.
Viridian said: “Viridian Group regularly works with a range of banks, including JP Morgan, to assist with financing and strategic options.
“JP Morgan has not been appointed as a global co-ordinator.”
Reuters said a source indicated any deal could give Viridian a value of about £1bn.