Guy Carpenter to Acquire Rattner Mackenzie

NEW YORK--(Business Wire)--
Guy Carpenter & Company, LLC, the world`s leading risk and reinsurance
specialist, announced today that it has entered an agreement to buy all of the
issued shares of the London-based reinsurance broker Rattner Mackenzie Limited
(RML) from HCC Insurance Holdings, Inc. (HCC).

HCC is a leading specialty insurance group headquartered in Houston, Texas, with
offices in the United States, Bermuda, Ireland, Spain and the United Kingdom.
RML is a specialty reinsurance broker. RML places HCC`s reinsurance programs in
the London market as well as servicing a number of third-party clients.

The transaction is consistent with Guy Carpenter`s strategy to supplement
organic growth with targeted acquisitions. Following successful completion of
the transaction, Guy Carpenter will become a significant provider of reinsurance
intermediary services to HCC.

"We have great respect for HCC and its management team and are extremely proud
to become a major trading partner as a result of this transaction," said Peter
Zaffino, President and Chief Executive Officer of Guy Carpenter. "The
acquisition of RML is further demonstration of our strategy to build our
capabilities in the specialty sector."

"This transaction will enable HCC to focus on its core businesses while enabling
RML to develop its business proposition in conjunction with Guy Carpenter, which
we believe to be an ideal home for RML," said John N. Molbeck Jr., President and
Chief Executive Officer of HCC Insurance Holdings, Inc. "We consider Guy
Carpenter to be a premier reinsurance intermediary and we are delighted to
further our trading relationship with them as a result of this transaction."

It is expected that the transaction will close in October 2009, following
receipt of regulatory approvals and satisfaction of other closing conditions.
Terms of the transaction have not been disclosed. Lexicon Partners (US) LLC
acted as financial advisor to Guy Carpenter in relation to the transaction, and
Freshfields Bruckhaus Deringer LLP acted as legal counsel.

Forward-looking statements contained in this press release are made under "safe
harbor" provisions of the Private Securities Litigation Reform Act of 1995 and
involve a number of risks and uncertainties. The types of risks and
uncertainties, which may affect the Company are set forth in its periodic
reports filed with the Securities and Exchange Commission.

About Guy Carpenter

Guy Carpenter & Company, LLC is the world`s leading risk and reinsurance
specialist and a part of the Marsh & McLennan Companies. With 50 offices
worldwide, Guy Carpenter creates and executes reinsurance solutions and delivers
capital market solutions* for clients across the globe. The firm`s full breadth
of services includes line of business expertise in Agriculture; Aviation;
Casualty Clash; Construction and Engineering; Excess and Umbrella; Life,
Accident and Health; Marine; Medical; Political Risk and Trade Credit;
Professional Liability; Property; Retrocessional Reinsurance; Surety; Terrorism
and Workers Compensation. GCFac is Guy Carpenter`s dedicated global facultative
reinsurance unit that provides placement strategies, timely market access and
centralized management of facultative reinsurance solutions. In addition, Guy
Carpenter`s Instrat unit utilizes industry-leading quantitative skills and
modeling tools that optimize the reinsurance decision-making process and help
make the firm`s clients more successful. Guy Carpenter`s website address is
www.guycarp.com.

* Securities or investments, as applicable, are offered in the United States
through GC Securities, a division of MMC Securities Corp., a US registered
broker-dealer and member FINRA/SIPC. Main Office: 1166 Avenue of the Americas,
New York, NY 10036. Phone: (212) 345-5000. Securities or investments, as
applicable, are offered in the European Union by GC Securities, a division of
MMC Securities (Europe) Ltd., which is authorized and regulated by the Financial
Services Authority. Reinsurance products are placed through qualified affiliates
of Guy Carpenter & Company, LLC. MMC Securities Corp., MMC Securities (Europe)
Ltd. and Guy Carpenter & Company, LLC are affiliates owned by Marsh & McLennan
Companies. This communication is not intended as an offer to sell or a
solicitation of any offer to buy any security, financial instrument, reinsurance
or insurance product.

About HCC Insurance Holdings, Inc.

Headquartered in Houston, Texas, HCC Insurance Holdings, Inc. (HCC) is a leading
international specialty insurance group with offices across the United States
and in Bermuda, Ireland, Spain and the United Kingdom. HCC has assets of $8.9
billion, shareholders' equity of $2.8 billion and is rated AA (Very Strong) by
Standard & Poor's and AA (Very Strong) by Fitch Ratings. In addition, HCC's
major domestic insurance companies are rated A+ (Superior) by A.M. Best
Company.

Guy Carpenter
Alexis Levenson, 917-937-3264
alexis.levenson@guycarp.com
or
DeMartine Group
Matt Conroy, 203-221-2790
mconroy@demartinegroup.com

Copyright Business Wire 2009