The Economist has this to say about their ownership structure and editorial independence:

The Economist is part of The Economist Group, a private company with a special ownership structure designed to preserve editorial independence. Its shareholders date back more than a century, and include great names in British business, such as the Sainsburys, Cadburys and Schroders. Other shareholders today include funds owned by the Agnelli and Rothschild families. Many staff of The Economist Group also own shares, which are privately traded twice a year.

The company’s constitution does not permit any individual or group to gain a majority shareholding, and no shareholder can exercise more than 20% of voting rights. The editor is appointed by trustees, who are independent of commercial, political and proprietorial influences. This structure ensures that The Economist can take an independent view of the world—free to challenge conventional thinking and concentrations of power. Its role is to inform, not to serve vested interests.

https://myaccount.economist.com/s/article/Who-owns-The-Econo...