This study aims to determine whether investors use non-financial disclosures in their investment activities, such as firm characteristics within companies indexed in IDX ESG Leaders during the 2020–2022 period and ESG (Environmental, Social, and Governance) and CSR (Corporate Social Responsibility). Investor responses are evaluated using Stocks Abnormal Return (SABR) and Trading Volume Activity (TVA). At the same time, non-financial disclosures are analyzed through ESG Score from Morningstar Sustainalytics, CSR Index from GRI Indicator, and firm factors including age and industry type. Results from a study of 45 data points, including 15 companies included in IDX ESG Leaders, suggest a notable inverse connection between ESG disclosure and SABR and TVA. However, the disclosure of CSR does not demonstrate a substantial effect. Company attributes, particularly age, benefit the level of trade activity, whereas the kind of industry has a notable adverse effect. To some extent, investors view ESG disclosure as a negative indication because of the risks that come with companies that perform in terms of ESG. On the other hand, a company's advanced age can be used by management to gain a competitive edge and demonstrate stability to investors, thanks to the long-standing ties with stakeholders that result in steady financial performance. In addition, investors tend to favor companies in low-risk industries while avoiding high carbon-emitting areas.