Which company is CNX?

Could you please clarify for me which company you are referring to when you say "CNX"? Is it a company in the cryptocurrency or finance industry? I'm not immediately familiar with a company widely known by that acronym, so it would be helpful if you could provide some more context or details. For example, are they a major player in a particular sector, or do they have a specific product or service that you're interested in learning more about?