Jonathan Harmsworth, 4th Viscount Rothermere

Jonathan Harold Esmond Vere Harmsworth, 4th Viscount Rothermere (born 3 December 1967), is a British hereditary peer and media proprietor who serves as chairman of Daily Mail and General Trust (DMGT), the media conglomerate that publishes the Daily Mail, Mail on Sunday, i, and Metro, among other assets. He inherited the viscountcy and controlling interest in DMGT following the death of his father, Vere Harmsworth, 3rd Viscount Rothermere, in 1998.

As the great-grandson of Harold Harmsworth, 1st Viscount Rothermere, who co-founded the Daily Mail with his brother Alfred, 1st Viscount Northcliffe, Rothermere represents the fourth generation of the Harmsworth family to lead the media empire. Under his chairmanship, DMGT underwent significant restructuring, divesting non-core assets and focusing on consumer media.

In 2021, he orchestrated the privatisation of DMGT, acquiring all outstanding public shares for approximately £1.6 billion and delisting the company from the London Stock Exchange after 90 years of public trading.