Thornburg Investment Management increased its commitment to promote responsible investing by signing the Principles for Responsible Investment sponsored by the United Nations, the firm announced Wednesday.

The U.N. document encourages signers to include environmental, social and governance factors in their investment decision-making process.

Thornburg Investment Management, headquartered in Santa Fe, N.M., is a privately owned global investment firm for institutional and retail investors with $49 billon in assets under management.