In Croatia, the term company is not legally defined, and for the definition it is necessary to determine its economic purpose. The company is organized legal entity through which the holder of the company acting on the market. The company has no legal personality but in legal relations enters carrier companies.For successful operation and functioning of companies is an important synergy of all four systems in the company. Respectively, for the successful functioning of the company it is very important that all systems function separately and that all systems are aligned with each other, because only in this way can achieve the set objectives of the company. But also, it is very important and entrepreneurial environment or environment in which the company operates. Division company by ownership is very important to determine the mode of enterprise management. The frequency of certain forms of ownership depends on the economic and social system of the country. Further description presents all kinds of enterprises by ownership and each separately processed. However, most attention is given to public and private companies, because those forms of enterprises that are quite often "conflicted". Private entrepreneurs in Croatia are represented through different forms of enterprise, or what shape that suits them at the time of establishing the company. By contrast, public companies are all units of state-owned and / or controlled by the state that sell industrial or commercial goods and services to the general public, and are formed as corporations.