What term describes an insurance company based in another country?

The term "alien insurer" specifically refers to an insurance company that is based in a country other than the one in which it is doing business. This term is widely used in the insurance industry to distinguish these companies from domestic insurers, which are located within the same country as the regulatory authority overseeing their operations.

In the context of insurance, understanding the classification of insurers is important for regulatory compliance, taxation, and determining which laws apply to the insurance products offered.

Other terms like "overseas insurer" or "global insurer" may capture the idea of international operations but lack the specific legal definition attributed to "alien insurer." "Transnational insurer" is not a widely recognized term in the same way and does not carry the same legal implications or clarity regarding a company’s operational origin relative to the business jurisdiction. Therefore, "alien insurer" is the most accurate term among the choices provided.