In 2019-2023, the average profitability in the banking sub-sector has increased and decreased. This study aims to analyse the Capital Adequacy Ratio, Non Performing Loan, Loan to Deposit Ratio and Operating Cost of Operating Income on Profitability. The research methodology used in this study uses quantitative methods. Data obtained from the Indonesia Stock Exchange website (www.idx.co.id) and www.bi.go.id. The population in this study are banking subsector companies listed on the Indonesia Stock Exchange in 2019-2023. The sampling technique used purposive sampling technique with a sample of 22 (twentytwo) companies. Data analysis for hypothesis testing using Multiple Linear Regression with the help of the Statistical Package for Social Sciences (SPSS) version 22 (twenty-two) programme. The results showed that Capital Adequacy Ratio and Loan to Deposit Ratio had no effect on Profitability, while Non Performing Loan and Operating Cost of Operating Income had a negative effect on Profitability.

This research aims to determine the effect of Current Ratio, Return on Asset, Asset Structure and Managerial Ownership on Capital Structure. The population in this research is companies that are members of Index LQ45 listed on the Indonesia Stock Exchange in financial reports for the 2019-2023 period. The sampling technique in this research used a purposive sampling method and a sample of 18 companies was obtained. The analysis technique used is multiple linear regression analysis using IBM SPSS version 22. software. The results of this research show Current Ratio and Return on Asset have a negative and significant effect on Capital Structure, Asset Structure have a positive and significant effect on Capital Structure, while Managerial Ownership has no effect on Capital Structure.