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A comparison of standardized ESG scores of the 15 largest insurance companies in the world in 2026 shows vast differences between ESG score providers in numerous instances. The world's largest insurer by market capitalization, UnitedHealth, saw one of the largest range of scores, with Sustainalytics awarding the equivalent score of *out of 100 (indicating a low level of ESG risk). Meanwhile, S&P rated the company with a score of ** out of 100 (indicating the company has a high level of ESG risk). However, there was also some degree of convergence between the two ESG score providers as well. For example, all both companies awarded high ESG scores (indicating low risk) to most of the large European insurers, such as Allianz, Munich Re, AXA, and Zurich Insurance Group.

What do ESG scores mean?

Environmental, social, and governance (ESG) scores are a vital investor tool used to assess a company's sustainability and ethical performance. As mentioned briefly above, ESG scores range from 0 to 100, with a score of more than 70 considered good and a score of less than 50 considered relatively poor. In 2021, a survey was carried out to determine investor satisfaction with the quality of ESG reporting globally. It was found that the largest share of investors reported poor satisfaction with their ESG reporting.

Allianz is one of Europe's leading insurer groups

Among the European insurance companies that were awarded high ESG scores, Allianz was the largest in terms of market capitalization, which amounted to nearly * billion U.S. dollars as of March 2026. One of the world's leading insurers, Allianz is a German financial services company headquartered in Munich that provides insurance and asset management as its core business products. In 2023, the Allianz Group generated the highest revenues recorded during the period of observation, amounting to a value of over *** billion euros.