This study aims to analyze the influence of Total Assets Turnover (TATO) and Gross Profit Margin (GPM) on Capital Structure in metal and mineral sub-sector companies listed on the Indonesia Stock Exchange (IDX) during the 2018–2022 period. Capital structure is a crucial aspect of corporate finance as it relates to funding policy and financial risk. The research method employed is quantitative with a multiple linear regression approach. Data were obtained from the annual financial reports of the selected companies. The analysis results show that, partially, Total Assets Turnover has a negative and significant effect on capital structure, while Gross Profit Margin has a positive and significant effect. Simultaneously, both independent variables significantly influence the capital structure. These findings indicate that asset utilization efficiency and gross profitability play essential roles in determining capital structure policy. Therefore, company management is advised to continuously improve operational efficiency and profitability to achieve an optimal and sustainable capital structure.

This research aims to determine the influence of Debt to equity ratio and Net profit margin partially or simultaneously on stock returns at PT. HM Sampoerna Tbk for 15 years, namely from 2008-2022. This research variable consists of Debt to equity ratio (X1), Net profit margin (X2), and stock returns (Y). The data collection method uses the documentation method. The data analysis method uses multiple linear regression analysis. The results of the F test show that simultaneously the independent variables DER and NPM have a positive and significant effect on stock returns. The results of the t test show that partially: 1) Debt to equity ratio (DER) does not have a partially significant effect on partial stock returns at PT. HM Sampoerna Tbk. 2) Net profit margin (NPM) does not have a partially significant effect on partial stock returns at PT. HM Sampoerna Tbk.