AG is an abbreviation of Aktiengesellschaft, which is a German term for a public limited company. This type of company shares are offered to the general public and traded on a public stock exchange. Shareholders' liability is limited to their investment.

Aktiengesellschaft, abbreviated AG, is a German term that refers to a corporation that is limited by shares, i.e. owned by shareholders, and may be traded on a stock market. The term is used in Germany, Austria, and Switzerland, but not Liechtenstein or Luxembourg.