Two insurance brokers with excellent future growth prospects are Marsh & McLennan (NYSE: MMC) and Goosehead Insurance (NASDAQ: GSHD). What makes Marsh & McLennan special is that it is a trusted advisor to companies looking to navigate risk and other issues like employee compensation, retirement plans, and the adoption of greener business practices. In recent years, companies have had to deal with supply chain issues, inflationary pressures, volatility in capital markets, and a transition to greener energy sources.