I think Pixar is similar to Apple, who Alex addressed:

Apple is a technology company thanks to some of its lines of business (hardware, software), but is not a technology company in all of its lines of business (music, movies, books).

i.e. Pixar is a technology company thanks to some of its lines of business (e.g. RenderMan), but is not a technology company in all of its lines of business (e.g. Toy Story).