ASSET4 is a ThomsonReuters business which collects corporate social responsibility data. Their product, ASSET4 ESG (“Environmental, Social, and Governance”) provides company-level data on 3,400 public companies worldwide, including some of the largest companies in the US. There is a minimum of 4 years of data for most companies.

For more details, http://libguides.mit.edu/sustainablebusiness/asset4