In the US, a company which has filed an SEC (Securities and Exchange CommissionSEC. In the US, a government agency which is responsible for...) registration, and may issue new shares. In the UK, a company which is listed on the Companies Register as a limited private companyCalled A Private Corporation in the US. A company whose shar..., a public limited companyIn the UK, a company that has a name ending in 'Ltd.' The ow..., or an unlimited companyIn the UK, a company whose owners have unlimited liability, ....