Morningstar, Inc. has acquired a 40% ownership stake in Sustainalytics, provider of ESG research and ratings. Morningstar says it made the move as part of its long-term sustainability strategy.

In August 2015, the two firms announced a strategic collaboration that resulted in the March 2016 launch of the Morningstar Sustainability Rating for global mutual and exchange-traded funds. The ratings use Sustainalytics research to gauge how well companies in funds are managing ESG issues.