MADISON, Wis. — CUNA Mutual Group Retirement Plan Services said it has received top rankings for overall client satisfaction, customer loyalty and brand relationship in the Boston Research Group's annual defined contribution provider study.According to CUNA Mutual, the study of client satisfaction and loyalty rated 22 defined contribution plan providers based on surveys of more than 1,380 plan sponsors with plan assets totaling $5 million or less. Regarding the company's 401(k) plan relationship satisfaction, 91% said they were satisfied, which included value for cost, recordkeeping services and participant statements.The Boston Research Group study also ranked CUNA Mutual high in loyalty including with customers likely to recommend the company, quality of reference and customers likely to consider for other employee benefit services.CUNA Mutual said it also scored high in brand image attributes and percent of eligible employees participating in the plan.–[email protected]