Before they went bust, some folks at Rhythm 'N Hues publicly talked about using it. It has pockets of usage at ILM, there are lots of software pockets though in these big design firms. Not all bitmap and vector tools are Adobe.

Unreal Engine has been pushing Blender a lot too, and attracted hires from ILM, they mentioned this a lot in their video podcast.

A lot of the time you only know a company is using something like Houdini because they pay for the promotion or give the customer a big license discount.

"Here at X we used Y for Z."