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Atlantic Specialty Insurance Company
A.M. Best #: 012666      NAIC #: 27154      FEIN #: 133362309
Administrative Office
601 Carlson Parkway Suite 600
Minnetonka, MN 55305
Web: www.OneBeacon.com
Phone: 781-332-7000
Fax: 781-332-7969
 
Domiciliary Address
77 Water Street 17th Floor
New York, New York 10005-4488
United States


Based on A.M. Best's analysis, 058167 - White Mountains Insurance Group Ltd is the AMB Ultimate Parent and identifies the topmost entity of the corporate structure. View a list of operating insurance entities in this structure.
Assigned to companies that have, in our opinion, an excellent ability to meet their ongoing insurance obligations.
 Best's Credit Ratings

View all of the companies assigned this rating as a part of an AMB Rating Unit.
 Financial Strength Rating  View Definition
Rating:   A (Excellent)
Financial Size Category:  
XI ($750 Million to $1 Billion)
Outlook:   Stable
Action:   Affirmed
Effective Date:    October 04, 2013
Initial Rating Date:    April 13, 2004
 Long-Term Issuer Credit Rating     View Definition 
Long-Term:   a
Outlook:   Stable
Action:   Affirmed
Effective Date:   October 04, 2013
Initial Rating Date:    June 30, 2005
 Best's Credit Rating Analyst
Office: A.M. Best Company, Oldwick NJ
Senior Financial Analyst: Brian O'Larte
Assistant Vice President: Jennifer Marshall, CPCU, ARM

 Reports and News
Visit Best's News and Analysis site for the latest news and press releases for this company and its A.M. Best Group.

AMB Credit report AMB Credit Report  - includes Best's Financial Strength Rating and rationale along with comprehensive analytical commentary, detailed business overview and key financial data.
Report Revision Date: 3/19/2014 (represents the latest significant change).
AMB Credit report Historical Archive Historical Reports are available in AMB Credit Report Archive.

Executive Summary Report Best's Executive Summary Reports (Financial Overview) - available in three versions, these presentation style reports feature balance sheet, income statement, key financial performance tests including profitability, liquidity and reserve analysis.
Data Status: 2014 Best's Statement File - P/C, US Contains data compiled as of 4/23/2014 As Received.
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    KRG Best's Key Rating Guide Presentation Report - includes Best's Financial Strength Rating and financial data as provided in the most current edition of Best's Key Rating Guide products. (Quality Cross Checked).
     Financial and Analytical Products