"In this article we analyze a sample of international #insurers between 2013 and 2022, and show that the purchase of #reinsurance is negatively related to their #sustainability, as measured by #esg scores. Furthermore, we illustrate that insurers' losses decrease with higher levels of reinsurance and sustainability. However, while reinsurance brings down insurers' profitability, sound ESG scores are related to lower expenses and increasing profitability. Our interpretation is that strong ESG profiles may serve as a cheaper alternative to reinsurance for #riskmitigation."