I work on supply chain optimization at Target, and we write lots of internal documents in TeX. Admittedly the team has a relatively academic background—many PhDs in math, CS and OR—but it's still industry use :).
Some Word/PowerPoint creeps in as well, but I highly prefer the TeX documents. They look better, are easier to edit/reuse and slot neatly into Git. I really wish more people used it (or Markdown or whatever) instead of Office nonsense.
Completely agreed (happy LaTeX user in industry). However, I have recently been using org-mode for emacs and treating LaTeX as one possible output format. Being able to output to HTML/markdown is really useful for automating import into more commonly used tools.
For anything with non-trivial maths or structure, I'd still use LaTeX, but it's very nice to have an (easier, more portable) choice of output formats.
Some Word/PowerPoint creeps in as well, but I highly prefer the TeX documents. They look better, are easier to edit/reuse and slot neatly into Git. I really wish more people used it (or Markdown or whatever) instead of Office nonsense.