In this final seminar the work of companies will be presented on the case of Bc Agroslavonija d.o.o. in Osijek, which is owned by the related company Bc Institute d.d. in Zagreb, who is the leading Croatia manufacturer and breeder of seed products such as seed of corn and different kinds of grains and seed of grass. In order to better understand the business operations of the two interrelated companies their mutual synergy will be shown. Agriculture is one of the main industries in the Republic of Croatia, therefore, the management and operation of large and medium-sized businesses will be described and explained from an economic perspective. In order to emphasize the importance of Bc Agroslavonija d.o.o. and Bc Institute d.d. their establishment and development throughout history will be shown. It is also important to show and explain the key elements of which the company Bc Agroslavonija d.o.o. leads its business, such as mission, vision and social responsibility. The operations of these companies are very important branch of economy. These operations are analyzing the market, consulting and giving instructions and consultations related to agricultural production. Bc Agroslavonija d.o.o. has during the years, despite fierce competition, achieved and maintained the prestigious status of a recognizable company that deals with the promotion and strengthening of agriculture in the Republic of Croatia. The business of the company consists of sales, distribution, marketing of domestic corn seed and grain produced on the domestic market under the Bc Institute d.d..