The study aims to measure the impact of dividends, net income after taxes and earring per share on the market capitalization of companies listed in Amman Stock Exchange during the period 1978-2016. The study using E-views program to analyze the data, as the analysis showed that there is statistically significant positive relationship between the dividends and the market capitalization. As well as, a positive relationship between the net income after taxes and the market capitalization of listed companies in Amman Stock Exchange. The study found that there is no statistically significant between earnings per share and market capitalization, and this means that investors are interested in dividends and net income after taxes in the demand on shares, but they do not care about earnings per share when they demand shares.