- Aetna
- AIC
- AIG
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- Assurant Health
- Bass Underwriters
- BCBS
- Berkshire Hathaway
- Bristol West
- Burns & Wilcox
- Celtic
- Chubb
- Cigna
- CNA
- Coventry
- Delta Dental
- Employers
- Fireman's Fund
- Foremost
- Genworth Financial
- Golden Rule
- Guardian
- Hanover
- Hartford
- Humana
- Kaiser Permanente
- Lexington
- Liberty Mutual
- Lloyd's
- MetLife
- National Flood Insurance Program (NFIP) / FEMA
- Nationwide
- Natl. Interstate
- Ohio Natl.
- Philadelphia
- Prime Rate
- Principal Financial Group
- Progressive
- Reliance Std.
- RSUI
- Safeco
- Selective
- Sequoia
- Tower Grp.
- Transamerica
- Travelers
- United Healthcare
- United HealthOne
- Victoria
- Zurich