Alterra Capital To Participate At The JMP Securities Financial Services And Real Estate Conference

Alterra Capital Holdings Limited (“Alterra”) (NASDAQ: ALTE; BSX: ALTE.BH) announced today that W. Marston (Marty) Becker, President and Chief Executive Officer, will present at the JMP Securities Financial Services and Real Estate Conference being held at The St. Regis New York, at 2 East 55 th Street, New York, NY. Alterra's presentation will take place on Thursday, September 13, 2012 at 9:00a.m Eastern Time and can be accessed through Alterra’s website: www.alterracap.com. There will be a live webcast of the presentation that may be accessed via the following link:

http://wsw.com/webcast/jmp19/alte/

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

Cautionary Note Regarding Forward-Looking Statements

The presentation may include forward-looking statements that reflect Alterra’s current views with respect to future events and financial performance. These forward-looking statements are subject to certain risks and uncertainties that could cause actual results to differ materially from those suggested by such statements. For further information regarding cautionary statements and factors affecting Alterra’s future results, please refer to the most recent reports on Form 10-K and Form 10-Q and other documents filed by Alterra with the SEC. Alterra undertakes no obligation to update or revise publicly any forward-looking statement whether as a result of new information, future developments or otherwise.

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