JPMorgan Chase & Co reports a shareholding in Adecco of 5.1% (2.2% registered shares)

Zurich, Switzerland, August 28, 2007: Pursuant to art. 9 and 17 of the Stock Exchange Ordinance-FBC, Adecco S.A. has received the following notification: By August 21st 2007, a group consisting of JPMorgan Chase & Co, 270 Park Avenue, New York, NY 10017, United States, and its subsidiaries is holding 5.05% of the share capital in shares and derivatives. Type of rights Number of rights Percentage Equity 4'222'826 2.24 % Derivatives 1) 5'311'795 2.81 % 1) Delivery in kind foreseen/possible For further information please refer to the attached PDF document. Contact: Investor Relations: Tel: +41 44 878 89 25 E-Mail: investor.relations@adecco.com --- End of Message --- Adecco SA Sagereistrasse 10 Glattbrugg Switzerland WKN: 922031; ISIN: CH0012138605; Index: SLCI, SMI, SPI, SMIEXP; Listed: Main Market in SWX Swiss Exchange;