Alteris Appoints John Atherton as Senior Vice President, General Manager to Head Public Risk Solutions Division

  Alteris Appoints John Atherton as Senior Vice President, General Manager to
  Head Public Risk Solutions Division

Business Wire

BOSTON -- December 13, 2013

Alteris Insurance Services, Inc., a wholly-owned subsidiary of Argo Group
International Holdings, Ltd. (NASDAQ:AGII), an international underwriter of
specialty insurance and reinsurance products, today announced that the company
has appointed John Atherton as senior vice president, general manager, to head
Alteris Public Risk Solutions. He will report to Hilbert “Van” Schenck, CPCU,
president, Alteris.

In his new role, Mr. Atherton will oversee all business operations, including
underwriting and business development, for Alteris Public Risk Solutions from
the company’s San Francisco office. Prior to joining Alteris, Mr. Atherton
served as senior vice president at Starr Companies where he managed the
company’s public entity division. He has also held similar leadership roles at
Liberty Mutual and Zurich Insurance Group.

Mr. Atherton has a bachelor’s degree in government and politics, and the
Chartered Property and Casualty Underwriter (CPCU) professional designation.

About Alteris

Alteris Inc. and Alteris Insurance Services, Inc., members of Argo Group
International Holdings, Ltd. (NASDAQ:AGII), provide services-oriented,
complete solutions, operating through three business divisions: Strategic
Markets, Alternative Risk, and Commercial Subsets. Alteris offers managing
general agencies and insureds access to a broad array of exclusive risk
solutions for specialty programs and alternative risks including program
placement, risk bearing solutions, capital support, strategic alliances,
policy systems solutions, claims services, and reinsurance solutions.
Information on Alteris is available at www.alterisus.com.

About Argo Group

Argo Group International Holdings, Ltd. (NASDAQ:AGII) is an international
underwriter of specialty insurance and reinsurance products in the property
and casualty market. Through its operating subsidiaries, Argo Group offers a
full line of products and services designed to meet the unique coverage and
claims handling needs of businesses in four primary segments: Excess & Surplus
Lines, Commercial Specialty, International Specialty and Syndicate 1200. Argo
Group’s insurance subsidiaries are A.M. Best-rated ‘A’ (Excellent) and Argo
Group’s U.S. insurance subsidiaries are Standard & Poor’s-rated ‘A-’ (Strong).
For more information visit www.argolimited.com.

Contact:

Argo Group International Holdings, Ltd.
Jamie Pachomski, APR, 617-235-6166
Manager, Corporate Communications & PR
jpachoms@argogroupus.com