Primus Guaranty to Participate in Lehman Brothers 2005 Financial Servi

    Business Editors
    Lehman Brothers 2005 Financial Services Conference

    HAMILTON, Bermuda--(BUSINESS WIRE)--May 5, 2005--Primus Guaranty, Ltd. (NYSE:PRS) has announced that Chief Executive Officer Thomas Jasper will make a presentation at the Lehman Brothers 2005 Financial Services Conference on Thursday, May 12, 2005 at 10:40 a.m. BST time (5:40 a.m. EST). The conference is being held at Lehman Brothers European Headquarters in London.
    Mr. Jasper's presentation will be available via live or archived webcast at Primus Guaranty's website, http://ir.primusguaranty.com/.

    About Primus Guaranty, Ltd.

    Primus Guaranty, Ltd., through its principal operating subsidiary, Primus Financial Products, LLC, offers protection against the risk of default on investment grade credit obligations. Primus Financial assumes these risks through the sale of credit default swaps to dealers, banks and portfolio managers. As a swap counterparty, Primus Financial is rated Aaa by Moody's Investor Service, Inc. and AAA by Standard & Poor's Rating Services. Another subsidiary of Primus Guaranty, Primus Asset Management, Inc., manages the credit swap portfolio of Primus Financial, and offers credit default swap portfolio management services to third parties.

--30--MT/ny*

CONTACT: Kennedy & Company Media Contact: Susan Hartzell, 914-961-2436 ext. 15 susan@kennedycom.com or Primus Guaranty, Ltd. IR Contact: Christopher N. Gerosa, 212-697-1992 cgerosa@primusguaranty.com

KEYWORD: UNITED KINGDOM INTERNATIONAL EUROPE LATIN AMERICA INDUSTRY KEYWORD: BANKING TRADESHOW CONFERENCE CALLS SOURCE: Primus Guaranty, Ltd.

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