Sun Life Financial (US)

Sun Life Financial (US) commands $8B in US premiums, outperforming #10 Transamerica in revenue. This Canadian-owned insurer is a dominant group benefits player, covering over 40 million Americans through employer-sponsored dental, vision, disability, and life plans. Its dental network spans 30% more providers than the average rival's, ensuring broad access for policyholders. The company's focus on workplace benefits gives it a stable, recurring revenue stream that outpaces #9 in growth consistency.