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Since 1971, The Insurance Sservices Office (ISO)  has been a leading source of information about property/casualty insurance risk. ISO provides a broad spectrum of commercial and personal lines of insurance, including: 

  • statistical, actuarial, underwriting, and claims information
  • policy language
  • information about specific locations
  • fraud-identification tools
  • technical services

Listed below are the 20011 TOP 100 insurance groups by segment. The Davis Library receives these rankings quarterly from ISO and the information is made available as an Excel® spreadsheet package. This makes it easy to analyze and manipulate this vital statistical financial information by cutting and pasting data into other applications.

Top Insurance Groups Second Quarter Monthly
Top Insurance Groups Second Quarter (year to date info)

if you would additional information on any of these companies or have questions about how ISO compiles these list contact the Davis Library at 212 277 5135 or email – davislibrary@stjohns.edu.