Argo Group Announces Release Date and Conference Call for Its 2008 Second Quarter Results

Argo Group International Holdings, Ltd. (NasdaqGS: AGII) announced today it will release financial results for the Company’s 2008 second quarter after U.S. market close on Thursday, August 7, 2008. Company management will conduct an investor conference call starting at 11:00 a.m. EDT (12 p.m. ADT) on Friday, August 8, 2008.

CONNECTING TO THE CONFERENCE CALL

A live webcast of the conference call can be accessed by visiting Argo Group’s investor relations Web site at www.argolimited.com and clicking on the following links: Investors – News & Events – Webcasts. Participants inside the U.S. and Canada can access the call by dialing (888) 713-4209 (pass code 62552660). Callers dialing from outside the U.S. and Canada can access the call by dialing (617) 213-4863 (pass code: 62552660).

Argo Group is offering call participants a pre-registration option that expedites access to the call and minimizes hold times. Those who would like to take advantage of pre-registration can do so by accessing the following website: www.theconferencingservice.com/prereg/key.process?key=P7GTNH3HY.

Shortly after the conclusion of the conference call, a webcast replay will be made available by visiting www.argolimited.com and clicking on the following links: Investors – News & Events – Webcasts. In addition, a replay of the call will be available to callers dialing from inside the U.S. and Canada through August 15, 2008, by dialing (888) 286-8010 (pass code 78081664). Callers dialing from outside the U.S. and Canada can access the call replay by dialing (617) 801-6888 (pass code 78081664).

ABOUT ARGO GROUP INTERNATIONAL HOLDINGS, LTD.

Headquartered in Hamilton, Bermuda, Argo Group International Holdings, Ltd. (NasdaqGS: AGII) is an international underwriter of specialty insurance and reinsurance products in the property and casualty market. Argo Group offers a full line of high-quality products and services designed to meet the unique coverage and claims handling needs of businesses in four primary segments: Excess and Surplus Lines, Commercial Specialty, International Specialty and London. Information on Argo Group and its subsidiaries is available at www.argolimited.com.