This document summarizes a study on the impact of capital structure on risk and firm performance using empirical evidence from companies listed on the Bucharest Stock Exchange between 2000-2016. The study aims to analyze major capital structure theories and their relevance, explore factors influencing leverage, profitability, and risk, and discuss gaps in previous Romanian research. Variables examined include leverage ratios, size, growth, liquidity, risk, and profitability. The results provide some support for both the trade-off and pecking order theories of capital structure. Future research could further analyze macroeconomic variables and their effect on capital structure decisions.