The abbreviation S.A. or SA, for the French Société Anonyme designates a type of limited company in certain countries, most of which have a Romance language as their official language and operates a derivative of the 1804, Napoleonic, civil law. Originally, shareholders could be literally anonymous and collect dividends by surrendering coupons attached to their share certificates. Dividends were paid to whomever held the certificate. Since share certificates could be transferred privately, corporate management would not necessarily know who owned its shares – nor did anyone but the holders.

A public company is a company whose ownership is organized via shares of stock which are intended to be freely traded on a stock exchange or in over-the-counter markets. A public company can be listed on a stock exchange, which facilitates the trade of shares, or not. In some jurisdictions, public companies over a certain size must be listed on an exchange. In most cases, public companies are private enterprises in the private sector, and "public" emphasizes their reporting and trading on the public markets.