This dissertation investigates the multifaceted impact of sustainability reports on companies. It begins by defining corporate social responsibility (CSR) and its role in integrating social and environmental interests into business operations, emphasizing the triple bottom line (TBL) framework. The research aims to analyze the influence of sustainability reports on financial performance, operating models, and market reputation, posing specific research questions to guide the investigation. The study's rationale highlights the increasing importance of sustainability reporting and its potential benefits for organizational growth, brand image, and market share. The dissertation's significance lies in providing insights for firms to understand and improve their sustainability reporting practices, as well as offering a foundation for further research. The dissertation is structured into five chapters, covering an introduction, literature review, research methodologies, data analysis, and conclusions with recommendations. The literature review explores the concept of sustainability reports, their impact on financial aspects, operating models, company reputation, and relevant legal standards. The research methodologies section outlines the research philosophy, design, approaches, strategy, data collection methods, sampling, data analysis, ethical considerations, and limitations. The data analysis chapter examines the impact of sustainability practices on financial performance, market reputation, and operating models. Finally, the conclusion and recommendations chapter summarizes the findings and suggests areas for improvement. The study uses both primary and secondary data for thematic analysis.