"Co" is just an abbreviation for the word "company." A company is an association of people working in a commercial business. This can be a limited liability company, sole proprietorship, or another structure. Abbreviating "company" as "co" does not have a specific meaning regarding a business's legal structure. About Incorporated Businesses Corporations (Inc., Ltd., Co.) The primary difference between this type of company is that it is owned by stockholders. There are directors or officers that are appointed and help manage the L7srH.