The subject of this paper deals with financing of companies through the issuance of securities. Given that the emphasis of this paper is on financing of incorporated companies, the securities issued by those companies are going to be analysed in more detail, i.e. through the theoretical part and based on two incorporated companies that will serve as an example. Financing is a process in which means needed by a company for its survival are being insured. The focal point of financing is money which, according to need, turns into other forms of assets. One of the most convenient ways of fund-raising for a company is the issuance of securities because it enables creating one’s own terms. Depending on the desired characteristics, the funds can be collected through shares, bonds or a combination of these securities. Securities designed for companies usually oblige that company to pay off yield, as a reward for the investors and the risk that they took. That is exactly the main issue the company should pay attention to because the whole process of fund-raising depends on the ratio of return and risk. Through examples of financing by issuing shares and issuing bonds, the reasons that led to the decision to broadcast one of these securities will be presented as well as the characteristics of the securities that the company has chosen. Given the fact that after the primary issue of securities, investors still trade with those securities but in the secondary market, the effects that investors achieve through further trade will be analyzed.