This study examines the influence of ESG score on the performance of firms in Germany using DAX 40. It explores the impact of ESG effectiveness on company governance and reputation, and highlights the importance of ESG transparency in improving customer behavior and stakeholder trust. The findings suggest that businesses benefit from disclosing ESG ratings data and that companies with higher ESG ratings experience better share prices. The study also discusses the relationship between ESG ratings and financial performance, as well as the challenges and opportunities in ESG reporting.