Horus Corporation is a security company based off in London. Its CEO is Gemma Chamberlain. Horus Corporation was discovered to be covering up for the Dismemberment Case Perpetrator's crimes and the company who was instilling fear into the citizens of London over getting dismembered.
Horus Corporation mainly appeared in Volume 15.
In V15C8, fugitive Gemma Chamberlain is shown to be speculating on the condition of her company and how it could be in the process of being investigated and shut down.