What company owns COS?

Could you please clarify which COS you are referring to? There are several companies and projects that use the acronym COS, such as Contentos, a blockchain-based content ecosystem, or Cosmos, an interoperable blockchain network. However, if you are asking about the ownership of a specific company or project named COS, I would need more context to provide an accurate answer. Could you please provide more information about the COS you are inquiring about?