I do recall Disney (a main reason copyright laws last so long, and who didn't want Steamboat Willie to enter public domain).

I also think of Amazon (which the creator of the Elm programming language describes as having "the Jeff problem" because they steal smaller people's/team's ideas), although that's a different problem.

I can't say anything comes to mind right now about MS, though, which is most likely a failure of my memory/knowledge. So I'd appreciate some examples.