Sun Life Financial, Inc. is a Canadian financial services company known primarily as a life insurance company. It is one of the largest life insurance companies in the world, and also one of the oldest with a history spanning back to 1865.

Sun Life Financial has a presence in investment management with over CAD$891 billion in assets under management operating in a number of countries. Sun Life ranks number 277 on the Forbes Global 2000 list for 2016 as well as on the Fortune 500 list.