Banking companies are increasingly active in stock trading as seen from the increase in the number of banks listed on the IDX. Several previous studies still yielded mixed results, so researchers are interested in conducting research with the title "The Effect of Debt To Equity Ratio (DER), Current Ratio, and Net Profit Margin (NPM) on Stock Prices (Empirical Study: In Banking Companies Listed on the Indonesia Stock Exchange in 2017–2019). This study is to determine the effect of Debt to Equity Ratio (DER), Current Ratio (CR) and Net Profit Margin (NPM) on stock prices. The object of this research is banking companies listed on the Indonesia Stock Exchange (IDX) for the 2017-2019 period. The sampling method used was purposive sampling. The data used in this research is secondary data. Data analysis was performed using descriptive statistical analysis tests, classical assumption tests, model suitability tests and hypothesis testing. The results of this study are expected to show that there is a significant influence between Debt to Equity Ratio (DER), Current Ratio (CR) and Net Profit Margin (NPM) on stock prices. The target output of this research is in the form of international journal publications