Corporate Social Responsibility (CSR) activities, which target social and environmental challenges, are prompted by pressures from stakeholders. As a result, businesses use Corporate Social Investment (CSI) channels to finance CSR initiatives in the areas in which they conduct business. There is still a dearth of empirical study in developing regions, especially in Asian countries, despite the large number of CSR studies carried out in wealthy nations. In order to determine the degree to which Firm Size and Organizational Sector predict Corporate Social Investment (CSI) in Asia, this quantitative study used frameworks for CSR and stakeholder engagement. To find out if these two organizational traits, used separately or together, have a substantial impact on CSI, three study questions were presented. Data from 54 Asian based companies that submitted reports to the Global Reporting Initiative (GRI) between 2018 and 2022 were examined in this study. Multiple regression analysis (MRA) using archival data from GRI reports showed that Organizational Sector emerged as a significant predictor (b = 0.275, p = 0.005), indicating that manufacturing and fertilizing companies contributed more to CSI than other companies, while Firm Size did not significantly predict CSI spending (b = −0.089, p = 0.259). This emphasizes how critical it is to take organizational sector into consideration as an important predictor of corporate social responsibility (CSR), and how important it is to take this into account when figuring out how firms might support social development in Asian communities.