BOSTON--(BUSINESS WIRE)--Loomis, Sayles & Company L.P., today announced that it is a signatory to the United Nations-supported Principles for Responsible Investment (PRI) Initiative. The PRI is recognized as the leading global network for investors who are committed to integrating environmental, social and governance (ESG) considerations into their investment practices and ownership policies. As a signatory to the PRI, Loomis Sayles volunteers to work towards a sustainable global financial