About Us

Ownership

White Mountains Reinsurance Company of America is the domestic U.S. arm of the White Mountains Re Group. We work closely with the other operating unit in the Group, Sirius International, our European-based operating company.

 

Offices

White Mountains Reinsurance Company of America is headquartered in New York City and has underwriting offices there as well as in Greenwich, Miami, and Toronto.

 

Strength

at 12/31/2009 

  • $832 million in regulatory capital
  • $2.4 billion in assets
  • $612 million in gross annual premiums
  • A.M. Best rating of "A-" (Excellent) 
  • Standard & Poor's rating of "A-"(Strong)

 

Business

  • Property, both Treaty and Facultative
  • Casualty Treaty 
  • Accident & Health Treaty 
  • Marine & Energy Treaty