Using investment choices as a mediating variable, this study aims to examine the impact of Environmental, Social, and Governance (ESG) Disclosure on financial performance among companies listed in the IDX ESG Leaders Index for the 2020–2024 period. This study employs an associative research design and quantitative methodology. The sample was selected using purposive sampling, resulting in 12 companies with a total of 60 observations. The Sobel The empirical evaluation relied on a path analytical framework to evaluate secondary data, which included sustainability reports and financial statements. Empirical estimations confirm that ESG transparency exerts no statistically meaningful impact on corporate financial outcomes (p = 0.250), ESG disclosure has a significant effect on investment decisions (p = 0.002), investment decisions do not have a significant effect on financial performance (p = 0.195), and investment decisions do not mediate the effect of ESG Disclosure on financial performance (Z-calculated = 1.216 < 1.96). These findings indicate that ESG Disclosure has not yet been able to improve the accounting-based performance metrics of companies belonging to the IDX ESG Leaders Index, either directly or through investment decisions. This study makes an empirical contribution by demonstrating that ESG disclosure has not emerged as a primary factor explaining variations in financial performance among companies with relatively high levels of ESG disclosure.
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