Commercial insurance broker Arthur J. Gallagher & Co. was the highest-performing broker in the J.D. Power 2015 Large Commercial Insurance Study. According to the study, conducted in association with the Risk Management Society, brokers that outperform their peers in overall satisfaction emphasize quality advice and guidance and reasonable fees. The study measures customer satisfaction with commercial insurance brokers based on eight attributes: quality of advice and guidance provided; reasonableness of fees; ease of the renewal process; effectiveness of risk control services; variety of program offerings; effectiveness of program review; billing and payment process; and claims process.