The Wireless Group - formerly UTV Media - has said that its chief executive John McCann has decided to retire.
This follows the completion of the sale of the company's television business to ITV earlier this week.
Mr McCann, who is 62, has been on the company's board for the past 23 years. He has spent 16 of these years as the company's chief executive.
He said the sale of the company's television business "marks a very natural time for him to retire".
Mr McCann joined UTV as financial controller in 1983, becoming director and general manager in 1990 and then CEO in 1999.
Under his leadership, UTV was transformed from its ITV regional licensee origins into a successful media company with radio, television and digital media operations in the UK and Ireland.
Meanwhile, the group said that Richard Huntingford, currently its non-executive Chairman, will become its executive chairman.
Mr Huntingford joined the board in 2012 and has extensive experience of the commercial radio business from his executive career at Chrysalis and Virgin Radio.
