Publication of Supplementary Prospectus

The following Supplementary Prospectus has been approved by the Financial Conduct Authority and is available for viewing:

Supplementary Prospectus dated 25 September 2024 (the "Supplementary Prospectus") relating to the EUR 3,500,000,000 Euro Medium Term Note Programme of Adecco Group AG, Adecco International Financial Services B.V., and Adecco Financial Services (North America), LLC unconditionally and irrevocably guaranteed by Adecco Group AG.

The Supplementary Prospectus should be read and construed in conjunction with the base prospectus dated 15 May 2024 (the "Base Prospectus").

To view the Supplementary Prospectus, please paste the following URL into the address bar of your browser:

http://www.rns-pdf.londonstockexchange.com/rns/6723F_1-2024-9-25.pdf

The Supplementary Prospectus has been submitted to the National Storage Mechanism and will shortly be available for inspection at: https://data.fca.org.uk/#/nsm/nationalstoragemechanism

For further information, please contact:

Sandrine Wait-Studer

M&A and Finance Lawyer

Telephone:      +41 75 443 9311                                          

Email:             sandrine.wait@adeccogroup.com; legal@adeccogroup.com

Adecco Group AG

Bellerivestrasse 30

CH-8008 Zürich

Switzerland

Adecco International Financial Services B.V.

Hogeweg 123

5301 LL Zaltbommel

The Netherlands

Adecco Financial Services (North America), LLC

1209 Orange St.

Wilmington

DE 19801

United States

DISCLAIMER - INTENDED ADDRESSEES

Please note that the information contained in the Supplementary Prospectus may be addressed to and/or targeted at persons who are residents of particular countries (specified in the Supplementary Prospectus) only and is not intended for use and should not be relied upon by any person outside these countries and/or to whom the offer contained in the Supplementary Prospectus is not addressed. Prior to relying on the information contained in the Supplementary Prospectus, you must ascertain from the Base Prospectus and the Supplementary Prospectus whether or not you are one of the intended addressees of the information contained therein.

In particular, the Supplementary Prospectus does not constitute an offer of securities for sale in the United States of America. This is not for distribution in the United States of America. The securities described herein have not been, and will not be, registered under the U.S. Securities Act of 1933, as amended (the "Securities Act"), or under any relevant securities laws of any state of the United States of America and are subject to U.S. tax law requirements. Subject to certain exceptions, the securities may not be offered or sold within the United States of America or to, or for the account or benefit of, U.S. persons or to persons within the United States of America, as such terms are defined in Regulation S under the Securities Act. There will be no public offering of the securities in the United States of America.

Your right to access this service is conditional upon complying with the above requirement.