(AG) AG (German, meaning: "stock company") is a corporation with a separate legal personality which must have at least five partners. The firm name usually reflects the activities of the company and must include "AG."

The German term Aktiengesellschaft (IPA /'aktsiəngəzεlʃaft/) (abbreviated AG) means a corporation that is limited by shares, i.e., owned by shareholders. It may be traded on the stock market. The term is used in Germany, Austria, and Switzerland.