There's a list in the very announcement: https://github.com/nim-lang/Nim/wiki/Organizations-using-Nim

though I'd imagine the number will remain small as Nim's too artisanal for enterprise to grok.

Goodboy Galaxy is a game in development for Game Boy Advance writen in Nim. They did a presentation about coding for GBA in NimConf 2020: https://www.youtube.com/watch?v=sZUM7MhWr88

Status makes heavy use of Nim in production:

https://github.com/orgs/status-im/repositories?q=&type=all&l...