65KV Fixed Rate Bond 12%

ADECCO INTERNATIONAL FINANCIAL SERVICES B.V.

(LEI: 549300PDNGPM4PIAUK57)

€450,000,000 Subordinated Fixed-to-Reset Rate Securities due 2056

unconditionally and irrevocably guaranteed by

ADECCO GROUP AG

NOTIFICATION OF ADMISSION TO TRADING OF TRANSFERABLE SECURITIS

The following transferable securities issued by Adecco International Financial Services B.V. (the "Issuer") and unconditionally and irrevocably guaranteed by Adecco Group AG (the "Guarantor") have today (24 April 2026) been admitted to trading on the main market of the London Stock Exchange plc:

€450,000,000 Subordinated Fixed-to-Reset Rate Securities due 2056 (ISIN XS3311978152) (the "Securities").

The Securities are issued pursuant to a prospectus dated 21 April 2026. Full information on the Issuer, the Guarantor and the offer of the Securities is only available on the basis of the Prospectus.

The Prospectus has been published on the website of the London Stock Exchange through a regulatory information service (https://www.londonstockexchange.com/news?tab=news-explorer).

For further information, please contact:

Liam Ó Caoimh VP, Treasury Ops

Telephone:       +41 44 296 9157                                            

Email:              liam.ocaoimh@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

DISCLAIMER - INTENDED ADDRESSEES

Please note that the information contained in the Prospectus may be addressed to and/or targeted at persons who are residents of particular countries only (as further specified in the Prospectus) 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 Prospectus is not addressed. Prior to relying on the information contained in the Prospectus you must ascertain from the Prospectus whether or not you are part of the intended addressees of the information contained therein.

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

This publication of the Prospectus does not constitute an offer of securities for sale in the United States. 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 may not be offered or sold in the United States of America or to, or for the benefit of, U.S. persons (as defined in Regulation S of the Securities Act), unless the securities are registered under the Securities Act or an exemption from the registration requirements of the Securities Act is available.