Who Is The Number One Life Insurance Company? 
The number one life insurance company by assets and insurance in force is MetLife and its related companies . There are so many areas in ranking a life insurance company . John Hancock has the leading 5 year net investment yield . There are also six rating services that measure the financial strength and claims paying ability of many of the life insurance companies that do business in the U.S. : A.M Best , S&P , Moodys , Fitch , Weiss and Comdex . There are also product spreadsheets published by independent industry Intel groups that rank by premium cost , policy provisions and serving claims experience 