Washington Post is a corporation

 Since 2013, The Washington Post has been owned by Jeff Bezos, the chief executive of Amazon, as a personal investment via Nash Holdings LLC. The Fact Checker is part of the national-news section of The Post, which is managed separately from the editorial and opinion section of The Post.

 MSNBC (originally short for Microsoft NBC) is an American news-based television channel and website headquartered in New York City. It is owned by NBCUniversal — a subsidiary of Comcast — and provides news coverage and political commentary.

 The New York Times is owned by a corporation, The New York Times Company, which is publicly traded on the New York Stock Exchange (NYSE). The New York Times Company is a mass-media company that also owns other publications and media properties, including Wirecutter, The Athletic, and The New York Times Cooking.