The document provides a literature review on theories and determinants of capital structure. It discusses Modigliani-Miller propositions, trade-off theory, pecking order hypothesis, asymmetric information models and signaling theory. It also analyzes how factors like firm size, profitability, liquidity, growth opportunities and tangibility influence capital structure decisions. Finally, it discusses some unique aspects of the Saudi Arabian regulatory environment that may impact capital structure choices for companies, including the lack of income tax and concentrated ownership structures.