Affiliated Managers announces investment in River Road Asset Management Affiliated Managers Group (AMG) has reached a definitive agreement with Aviva Investors North America Holdings, subsidiary of Aviva plc (AV), for AMG to acquire all of Avivaís equity interest in River Road Asset Management, LLC. Following the closing of the transaction, River Roadís management team will own a substantial portion of the equity of the business and continue to direct the firmís day-to-day operations. As part of the transaction, River Roadís executive team and key investment professionals have agreed to long-term commitments to remain with the firm. River Road will maintain an ongoing relationship with Aviva through a number of sub-advisory mandates. The terms of the transaction were not disclosed.