From the article:
Condé Nast, which owns Ars Technica and other publications such as Wired and The New Yorker, was joined in the lawsuit by The Atlantic, Forbes, The Guardian, Insider, the Los Angeles Times, McClatchy, Newsday, The Plain Dealer, Politico, The Republican, the Toronto Star, and Vox Media.
From another article:
The founders sold Reddit to Condé Nast for $10M less than a year after launch (in 2006). Ohanian and Huffman stayed on for a few years after the acquisition but, eventually, both went on to start other projects. Neither of them would be gone for long.
So, does Condé Nast own Reddit? Not exactly. Condé Nast owned Reddit until 2011 when Reddit became an “independent subsidiary” of Advance Publications—the company that owns Condé Nast, among others.