What company owns Specsavers?

Could you please enlighten me on the corporate structure behind Specsavers? Who exactly is the proprietor of this renowned optical retailer? Is it a publicly traded entity or privately held? I'm intrigued to know the name of the company that holds the reins of this successful brand. Additionally, I'm curious if there's any notable history or backstory associated with the ownership of Specsavers that sets it apart in the industry.