Read our Privacy noticeWest End theatre operator ATG is set to be acquired by Mari, the events company owned by American media tycoon Ari Emanuel. Mari, the business behind Hyde Park Winter Wonderland, confirmed it has reached a "definitive agreement" to buy ATG Entertainment from private equity firm Providence. Mari also runs a raft of UK events including Winter Wonderland, Big Feastival and Hampton Court Palace Festival. Mr Emanuel, founder and principal investor of Mari, said: “I’ve spent my whole career in entertainment, and I started out in theatre. Melanie Smith, global chief executive of ATG Entertainment, said: “Mari understands live entertainment and what matters most to ATG: our theatres, the people behind them and the relationships we have built with producers, artists and audiences.