Harris Associates L.P. reports a shareholding in Adecco of 5.03%

Zurich, Switzerland, 23 November 2007: Pursuant to art. 9 and 17 of the Stock Exchange Ordinance-FBC, Adecco S.A. has received the following notification: By November 20th 2007, Harris Associates L.P., Two North LaSalle Street, Suite 500, Chicago, Illinois 60602-3790, USA is holding 5.03% of the share capital. Type of rights Number of rights Percentage Equity (registered shares) 9'496'700 5.03% 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;