Abstract: A scoring system scores companies based on environment, social, and governance (ESG) data. The scoring system identifies the ESG data for the companies within a group of companies. The scoring system calculates individual company ESG scores from the ESG data and weights the company ESG scores based on proportions of the group of companies. The scoring system then generates a group ESG score based on the weighted company ESG scores for the group of companies. The rating system may calculate the company ESG scores based on different data categories, such as environmental related data, social related data, and governance related data.