AM Best Upgrades Credit Ratings of OneBeacon U.S. Holdings, Inc. and Its Subsidiaries

March 19, 2019

AM Best has upgraded the Financial Strength Rating to A+ (Superior) and the Long-Term Issuer Credit Ratings to “aa-”of Atlantic Specialty Insurance Company and its subsidiaries (formerly known as OneBeacon Insurance Group).

Intact Financial Corporation Completes Acquisition of U.S. Specialty Insurer OneBeacon Insurance Group, Ltd. and Announces Executive Appointment

September 28, 2017

TORONTO, Sept. 28, 2017 /CNW/ - Intact Financial Corporation (TSX: IFC) today announced that it has completed its C$2.3 billion (US$1.7 billion) acquisition of U.S. specialty insurer OneBeacon Insurance Group, Ltd. (OneBeacon). The acquisition makes IFC a leading provider of specialty insurance in North America with over C$2 billion in combined annual premiums focusing on small to midsize businesses. Read full news release>>

OneBeacon Environmental featured in company Management Report

May 15, 2017

Recently OneBeacon released its 2016 Management Report. We are pleased to be one of the businesses highlighted in the report's "Business Insights" section. Read our story here or check out the full report on

OneBeacon 2016 College Scholarship Applications Available!

February 15, 2016

We are excited to announce that we are once again awarding 16 college scholarships for the upcoming academic year funded through OneBeacon’s Charitable Trust. These $2,000 awards are exclusively available to OneBeacon employees as well as the agencies, brokers and wholesalers doing business with OneBeacon. Applying is easy! Simply download the application and review the program brochure. Completed materials, including a transcript, are due by April 15. For more information about the program, please visit our blog>>

Success Stories

December 15, 2015

Here are some accounts we’ve recently written to give you an idea of what we are working on.

Industry Solutions for Restoration Contractors

November 20, 2014

We've added information regarding coverage for Fire and Water Restoration Contractors.

New Applications Available

November 6, 2014

New Applications are available on our Resources page, including Environmental Contractors and Consultants, Fire & Water Restoration Contractors, Contractors Pollution Liability and Project-Specific Contractors Pollution Liability.

Expanded Capabilities

June 3, 2014

OneBeacon Environmental is pleased to announce the expansion of our excess capabilities through the addition of Environmental Excess Liability...