UnitedHealth Group took the top spot in AM Best’s ranking of the world’s 25 largest insurance companies for the seventh straight year, the rating agency has reported. The insurer posted $201.5 billion in net premiums written (NPW) in 2020. Allianz SE and AXA S.A. took the first and second spots in AM Best’s ranking by 2020 non-banking assets. AM Best released its rankings of the largest global insurance companies by NPW and non-banking assets in the Jan. 3 issue of BestWeek.