HOCHTIEF Annual Report 2006

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Fritz Voelkner *

Duisburg, Member of the Works Council, HOCHTIEF Construction AG, West Division

Dr.-Ing. E. h. Heinrich Weiss - until May 10, 2006 -

Hilchenbach-Dahlbruch, Chairman of the Managing Board of SMS GmbH, D�sseldorf

Commerzbank AG
Deutsche Bahn AG
SMS Demag AG (Chairman)
Voith AG
Bombardier Inc.
Thyssen-Bornemisza Group

Klaus Wiesehügel *

K�nigswinter, National Chairman of the Construction, Agricultural and Environmental Employees' Union, Frankfurt am Main

Zusatzversorgungskasse des Baugewerbes VVaG (Chairman)

Supervisory Board Committees

Mediation Committee pursuant to Sec. 27 (3) of the Codetermination Act (MitbestG)

Dr. rer. pol. h. c. Martin Kohlhaussen (Chairman)
Gerhard Peters
Josef Hess (until May 10, 2006)
Dr. jur. Dietmar Kuhnt
Klaus Wiesehügel (until May 10, 2006)

Human Resources Committee

Dr. rer. pol. h. c. Martin Kohlhaussen (Chairman)
Gerhard Peters (stellv.)
Alois Binder (from May 10, 2006)
Dr. jur. Dietmar Kuhnt
Professor Dr. Wilhelm Simson (from May 10, 2006)

Audit Committee

Dr. jur. Dietmar Kuhnt (Chairman)
Gerhard Peters (stellv.)
Alois Binder (from May 10, 2006)
Detlev Bremkamp
Günter Haardt (from May 10, 2006)
Professor Dr. Herbert Henzler (until May 10, 2006)
Dipl.-Ing. Gerhard Hilke (until May 10, 2006)
Gerd Peskes (from May 10, 2006)

Management Committee

All members of the Executive Board of HOCHTIEF Aktiengesellschaft
Dr.-Ing. E. h. Friedel Abel
Chairman of the Executive Board of HOCHTIEF Construction AG
Dr.-Ing. Reinhard Kalenda
Chief Executive Officer, HOCHTIEF AirPort GmbH

International Committee

All members of the Executive Board of HOCHTIEF Aktiengesellschaft
Wal M. King
CEO and Managing Director
Leighton Holdings Limited, Sydney, Australien
Peter J. Davoren
CEO and Chairman
Turner Construction Company, New York, USA

Representative Directors

Henning Mähl, Essen
Attorney-at-law Hartmut Paulsen, Düsseldorf

Executive Board

Dr.-Ing. Dr.-Ing. E. h. Hans-Peter Keitel

- until March 31, 2007 -
Essen, Chairman of the Executive Board of HOCHTIEF Aktiengesellschaft, Essen

Eurohypo Aktiengesellschaft
HOCHTIEF Construction AG
National-Bank AG
HOCHTIEF AUSTRALIA Ltd.
Leighton Holdings Limited (Deputy Chairman)
SGS SA

Attorney-at-law Albrecht Ehlers

Herdecke, Member of the Executive Board of HOCHTIEF Aktiengesellschaft, Essen

Glunz AG
HOCHTIEF Facility Management GmbH
Schindler Deutschland Holding GmbH
Builders' Credit Reinsurance Company S.A.
Contractors' Casualty & Surety Reinsurance Company S.A.

Dr. rer. pol. Burkhard Lohr

Haltern am See, Member of the Executive Board of HOCHTIEF Aktiengesellschaft, Essen

Dr.-Ing. Herbert Lütkestratkötter

Essen, Deputy Chairman of the Executive Board of HOCHTIEF Aktiengesellschaft, Essen
- from April 1, 2007, Chairman of the Executive Board of HOCHTIEF Aktiengesellschaft -

HOCHTIEF Construction AG (Chairman)
HOCHTIEF Facility Management GmbH (Chairman)
ThyssenKrupp Elevator AG
TÜV Rheinland Holding AG
The Turner Corporation
Leighton Holdings Limited

Dr. rer. pol. Peter Noé

Essen, Member of the Executive Board of HOCHTIEF Aktiengesellschaft, Essen

Flughafen Düsseldorf GmbH (Chairman)
Athens International Airport S.A.
HOCHTIEF AUSTRALIA Ltd.
HOCHTIEF AUSTRALIA HOLDINGS Ltd.
Leighton Holdings Limited

Professor Dr.-Ing. Martin Rohr

Essen, Member of the Executive Board of HOCHTIEF Aktiengesellschaft, Essen

Flughafen Hamburg GmbH
Arenberg-Recklinghausen GmbH (Chairman)

Dr. rer. pol. Hans-Georg Vater - until March 31, 2006 -

Ratingen, Member of the Executive Board of HOCHTIEF Aktiengesellschaft, Essen

HOCHTIEF Construction AG
SAB Spar- und Anlageberatung AG
Athens International Airport S.A.
Illbruck GmbH

* Supervisory Board member representing employees
a) Membership in other supervisory boards prescribed by law (as of December 31, 2006)
b) Membership in comparable domestic and international corporate governing bodies (as of December 31, 2006)