Adecco S.A. ("Adecco" or the "Company") - UK Rule 2.10 Announcement

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announcement.
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Zurich, Switzerland, August 6, 2008: Adecco announces, in accordance
with UK Rule 2.10 of The City Code on Takeovers and Mergers, that it
has 174,412,793 ordinary shares in issue of CHF 1.-- each as at the
close of business on August 5, 2008.

The International Securities Identification Number for Adecco's
ordinary shares is ISIN: CH0012138605.

Enquiries:

Adecco Corporate Investor Relations
Investor.relations@adecco.com ; Tel. +41 (0) 44 878 89 25

Dealing Disclosure Requirements:

Under the provisions of Rule 8.3 of the UK Takeover Code (the
'Code'), if any person is, or becomes, 'interested' (directly or
indirectly) in 1% or more of any class of 'relevant securities' of
Michael Page or Adecco, all 'dealings' in any 'relevant securities'
of that company (including by means of an option in respect of, or a
derivative referenced to, any such 'relevant securities') must be
publicly disclosed by no later than 3.30 pm (London time) on the
London business day following the date of the relevant transaction.
This requirement will continue until the date on which the offer
becomes, or is declared, unconditional as to acceptances, lapses or
is otherwise withdrawn or on which the 'offer period' otherwise ends.
If two or more persons act together pursuant to an agreement or
understanding, whether formal or informal, to acquire an 'interest'
in 'relevant securities' of Michael Page or Adecco, they will be
deemed to be a single person for the purpose of Rule 8.3.

Under the provisions of Rule 8.1 of the Code, all 'dealings' in
'relevant securities' of Michael Page or Adecco by Michael Page or
Adecco, or by any of their respective 'associates', must be disclosed
by no later than 12.00 noon (London time) on the London business day
following the date of the relevant transaction.

A disclosure table, giving details of the companies in whose
'relevant securities' 'dealings' should be disclosed, and the number
of such securities in issue, can be found on the Takeover Panel's
website at http://www.thetakeoverpanel.org.uk/new/.

'Interests in securities' arise, in summary, when a person has long
economic exposure, whether conditional or absolute, to changes in the
price of securities. In particular, a person will be treated as
having an 'interest' by virtue of the ownership or control of
securities, or by virtue of any option in respect of, or derivative
referenced to, securities.

Terms in quotation marks are defined in the Code, which can also be
found on the Panel's website. If you are in any doubt as to whether
or not you are required to disclose a 'dealing' under Rule 8, you
should consult the Panel.

Forward-looking statements
Information in this release may involve guidance, expectations,
beliefs, plans, intentions or strategies regarding the future. These
forward-looking statements involve risks and uncertainties. All
forward-looking statements included in this release are based on
information available to Adecco S.A. as of the date of this release,
and we assume no duty to update any such forward-looking statements.
The forward-looking statements in this release are not guarantees of
future performance and actual results could differ materially from
our current expectations. Numerous factors could cause or contribute
to such differences. Factors that could affect the Company's
forward-looking statements include, among other things: global GDP
trends and the demand for temporary work; changes in regulation of
temporary work; intense competition in the markets in which the
Company competes; changes in the Company's ability to attract and
retain qualified temporary personnel; the resolution of the French
anti-trust procedure and any adverse developments in existing
commercial relationships, disputes or legal and tax proceedings.

About Adecco
Adecco S.A. is a Fortune Global 500 company and the global leader in
HR services. The Adecco Group network connects over 700,000
associates with clients each day through its network of over 37,000
employees (FTEs) and approximately 7,000 offices in over 60 countries
and territories around the world. Registered in Switzerland, and
managed by a multinational team with expertise in markets spanning
the globe, the Adecco Group delivers an unparalleled range of
flexible staffing and career resources to clients and associates.

Adecco S.A. is registered in Switzerland (ISIN: CH0012138605) and
listed on the Swiss Stock Exchange with trading on SWX Europe (SWX:
ADEN) and the Euronext Paris (EURONEXT: ADE).

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Adecco SA
Sagereistrasse 10 Glattbrugg Switzerland

WKN: 922031;
ISIN: CH0012138605; Index: SLCI, SMI, SPI, SMIEXP;
Listed: Main Market in SWX Swiss Exchange;
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