A production company like Marvel Studios (a subsidiary of Disney) creates the movie. The parent studio Disney pays for it, releases it worldwide, and sells the merchandise.
Once the undisputed king, Pixar is currently in a "production identity crisis." Their traditional model (6-year development cycles, perfect storytelling) produced Elemental , which fumbled at the box office but streamed well.
From the "Volume" LED tech used in The Mandalorian to the cutting-edge CGI of Avatar: The Way of Water .