We look at the Environmental, Social and Governance (ESG) practices of the US’s top 100 Private Equity Firms, representing more than $1.5 trillion of committed capital and directly employs 12 million individuals in the United States. We find that the ESG practices, and their corresponding disclosures, significantly lag behind that of publicly traded industrial firms. Roughly 58% of the top Private Equity Firms disclose zero information about their ESG practices, and two-thirds of those that disclose, have sparsely populated and uninformative ESG information. Although 39% of firms have activities related to the S-dimension of ESG, only 19% of firms have at least 10% women on their board or as top executives. We create a comprehensive ESG score, including sub-scores for E, S, and G. Buyout funds, the number of PE employees, and listing status, positively load on our ESG score. IRRs do not predict ESG scores overall, but are related to higher social scores.