This research has been conducted with the aim of investigating the effect of the information content of annual dividend announcements on the changes in stock prices of Tehran Stock Exchange companies. This research is based on the objective of an applied type and in terms of nature and descriptive method of survey, as well as the correlational research type. In order to test the hypotheses of the research from financial data, classified and audited active companies accepted in the Tehran Stock Exchange were used in this research, the statistical sample includes 231 companies investigated between 2018 and 2022. In this research, regression model and correlation analysis were used and Eviews software was used for data analysis. The results of the statistical tests showed that at the error level (5%) there is a direct relationship between annual stock return and operating profitability and instability operating profit and there is a significant relationship between the components of operating profitability and the ratio of market value to book value of the stock, as well as between the ratio market value to book value and the stability operating profit and its instability there is a significant relationship, so at the error level (6%) there is a direct relationship between the annual return of the stock and the stable operating profit, so the first, second and fourth hypotheses of the research are confirmed at the confidence level of 95%. And the third hypothesis are confirmed at the confidence level of 94%.