In 1999, the Ameritas Life Insurance Company merged with Acacia Mutual Holding Company. The latter had been formed in 1997 when Acacia Life Insurance Company of Washington, D.C., converted from a mutual life insurance company to a stock company wholly owned by a mutual insurance holding company. The company formed by the merger of the Acacia and Ameritas holding companies was named the Ameritas Acacia Mutual Holding Company.
On January 1, 2006, Ameritas Acacia Mutual Holding Company merged with the Union Central Mutual Holding Company of Cincinnati, Ohio, and became the UNIFI Mutual Holding Company. Union Central Life was originally established as a mutual life insurance company in 1867, and it had formed its own mutual insurance holding company in 2005.