ALTERRA To Hold First Quarter 2011 Earnings Call

Hamilton, Bermuda – 08 April, 2011 - Alterra Capital Holdings Limited (NASDAQ: ALTE; BSX: ALTE.BH) announced that it will release Q1 2011 financial results after the market close on May 3, 2011.  Alterra will hold a conference call with the investment community on May 4, 2011 to discuss these results and related matters.  

President and Chief Executive Officer W. Marston (Marty) Becker and Executive Vice President and Chief Financial Officer Joe Roberts will represent Alterra on the call, the details of which are as follows:

Date:  Wednesday, May 4, 2011

Time:  10:00 a.m. EDT

Toll-free number (US callers): 1-888-680-0894

International callers: 617-213-4860

Access Code (all participants): 35073202.  Please dial in five to ten minutes prior to the start of the call.

If you wish to pre-register for this event, please go to the following website: https://www.theconferencingservice.com/prereg/key.process?key=PL4Q4YY3R

In addition, interested persons may listen to the earnings call via Alterra's website: www.alterracap.com.

If you are unable to participate in the "live" call, a replay will be available from approximately 1:00 p.m. EST on May 4, 2011 until June 4, 2011.  To listen to the replay, US-based callers may dial 1-888-286-8010 and international callers may use 1-617-801-6888; the access code for the replay is 12376267.

Alterra Capital Holdings Limited is a global enterprise dedicated to providing diversified specialty insurance and reinsurance products to corporations, public entities and property and casualty insurers. 

Contacts

Susan Spivak Bernstein

Senior Vice President             susan.spivak@alterra-bm.com          1-212-898-6640

Roanne Kulakoff or Peter Hill

Kekst and Company               roanne-kulakoff@kekst.com  or        peter-hill@kekst.com                                                  1-212-521-4800