ACS Reaches 31.59 Percent Holding in HOCHTIEF

This announcement and the information contained herein are restricted and are not for release, publication or distribution, in whole or in part, in or into the United States or Japan.

MADRID, January 21, 2011 - Grupo ACS (ACS, Actividades de Construccion y Servicios, S.A.)
today announced that its voluntary public tender offer for HOCHTIEF had been
accepted for 4.34 percent of the shares in HOCHTIEF at expiration of the
additional and final acceptance period on 18 January 2011. This will add to
the previous stake held by ACS, taking its shareholding in HOCHTIEF to 31.59
percent. All completion conditions to the offer have now been fulfilled. The
offer will be settled in the first days of February 2011.

More information about the public tender offer is available at
www.acs-offer.com.

About Grupo ACS

Grupo ACS (ACS, Actividades de Construccion y Servicios, S.A.), headquartered
in Madrid/Spain, is a world leader in infrastructure development. In 2009,
the Group's revenues totaled EUR15,606 million. ACS has more than 146,000
employees operating in 41 countries. ACS is listed on the Madrid Stock
Exchange.

Important Notice:

This announcement is neither an offer to purchase nor a solicitation of
an offer to sell shares in HOCHTIEF Aktiengesellschaft (the "HOCHTIEF
Shares"). Moreover, the announcement is neither an offer to purchase nor a
solicitation to purchase shares in ACS, Actividades de Construccion y
Servicios, S.A. (the "ACS Shares"). The public offer by ACS, Actividades de
Construccion y Servicios, S.A. to the shareholders of HOCHTIEF
Aktiengesellschaft is exclusively made on the basis of the terms set out in
the offer document, as amended. Investors and holders of HOCHTIEF Shares are
strongly recommended to read the offer document and all announcements
published in connection with the public offer, since they contain important
information.

Subject to certain exceptions, the public offer will not be made directly
or indirectly, in or into the United States, Japan or any other jurisdiction
where to do so would constitute a violation of the laws of such jurisdiction,
or by use of the mails or by any means or instrumentality (including without
limitation, facsimile transmission, telephone and the internet) of interstate
or foreign commerce, or any facility of a national securities exchange, of
the United States, Japan, or any other jurisdiction where to do so would
constitute a violation of the laws of such jurisdiction. Accordingly, copies
of this announcement or any accompanying documents are not being, directly or
indirectly, mailed or otherwise distributed, forwarded or transmitted in,
into or from the United States, Japan, or any other jurisdiction where to do
so would constitute a violation of the laws of such jurisdiction.

The ACS Shares have not been, and will not be, registered under the US
Securities Act of 1933 or with any securities regulatory authority of any
state or other jurisdiction of the United States or under the applicable
securities laws of Japan. Accordingly, subject to certain exceptions, the ACS
Shares may not be offered or sold within the United States or Japan or any
other jurisdiction where to do so would constitute a violation of the laws of
such jurisdiction, or to or for the account or benefit of any person in the
United States or Japan.

To the extent permissible under applicable law or regulation, ACS and
persons acting on its behalf may from time to time make certain purchases of,
or arrangements to purchase, directly or indirectly, HOCHTIEF Shares or any
securities that are immediately convertible into, exchangeable for, or
exercisable for, HOCHTIEF Shares, other than pursuant to the public offer,
before, during or after the period in which the offer remains open for
acceptance. These purchases may occur either in the open market at prevailing
prices or in private transactions at negotiated prices. Any information about
such purchases and arrangements to purchase will be disclosed as required by
law or regulation in Germany or other relevant jurisdictions.

This announcement includes forward-looking statements about ACS, HOCHTIEF
and the enlarged group. By their nature, forward-looking statements involve
risks and uncertainties because they relate to events and depend on
circumstances that may or may not occur in the future. ACS cautions you that
forward-looking statements are not guarantees of the occurrence of such
future events or of future performance and that in particular the actual
results of operations, financial condition and liquidity, and the development
of the industry in which ACS and HOCHTIEF operate may differ materially from
those made in or suggested by the forward-looking statements contained in
this announcement. Any forward-looking statements speak only as at the date
of this announcement. Except as required by applicable law, ACS does not
undertake any obligation to update or revise publicly any forward-looking
statement, whether as a result of new information, future events or
otherwise.

    Company Contacts:

    German and international media:
    Phoebe Kebbel
    Hering Schuppener Consulting
    Phone:  +49-69-921874-77
    Mobile: +49-173-2862110
    pkebbel@heringschuppener.com

    Oda Woltje
    Hering Schuppener Consulting
    Phone:  +49-69-921874-47
    Mobile: +49(151)15176631
    owoeltje@heringschuppener.com

    Investor Relations:
    Grupo ACS
    Avda. Pio XII, no. 102
    28036 Madrid, Spain
    Tel: +34-91-343-92-00
    Fax: +34-91-343-94-56
    e-mail: infogrupoacs@grupoacs.com

Company Contacts: German and international media: Phoebe Kebbel, Hering Schuppener Consulting, Phone: +49-69-921874-77, Mobile: +49-173-2862110, pkebbel at heringschuppener.com; Oda Woltje, Hering Schuppener Consulting, Phone: +49-69-921874-47, Mobile: +49(151)15176631, owoeltje at heringschuppener.com; Investor Relations: Grupo ACS, Avda. Pio XII, ndegrees 102, 28036 Madrid, Spain, Tel: +34-91-343-92-00, Fax: +34-91-343-94-56, e-mail: infogrupoacs at grupoacs.com