IBM Research also supported a number of first rate scientists. Just a couple of the better known names: Mandelbrot and Landauer worked there, and Charles Bennett still works there I think.
Cuprate superconductors were discovered by Bednorz and Müller at IBM in Zurich in 1986. They got the Nobel for it the next year. The physics Nobel the previous year also went to researchers at IBM Zurich, for the invention of atomic force microscopy.