Who insures insurance companies over and over? Hannover! Hannover Rück (Hannover Re) is the second-largest German reinsurance company (Munich Re is #1) and the fourth-largest such company in the world. Through more than 100 subsidiaries, the company provides property and casualty (Hannover Re's largest segment), financial, life, and health reinsurance products in about 150 countries worldwide. Financial reinsurance is provided through Hannover Re Advanced Solutions, a Dublin-based consortium managed jointly with HDI Reinsurance (Ireland); both Hannover Re and HDI Reinsurance (Ireland) are subsidiaries of HDI Haftpflichtverband der Deutschen Industrie.