NEW YORK--(BUSINESS WIRE)--Voya Financial, Inc. (NYSE: VOYA) and OneAmerica Financial, Inc., a diversified mutual insurance organization, today announced that the companies have entered into a definitive agreement for Voya to acquire OneAmerica Financial’s full-service retirement plan business. The acquisition adds strategically attractive scale to Voya’s full-service retirement business within Wealth Solutions, providing Voya with a broader set of capabilities that complement its existing prod