Completion of Acquisition

Maidenhead , United Kingdom
18 May 2007

SDL announces that, following the Admission at 8am today of 11,275,684 new ordinary
shares to trading on the Official List of the London Stock Exchange, the acquisition of Tridion
Holding B.V. as announced on 24 April 2007, has been completed.

The Company confirms that, following the admission of the shares described above, SDL
plc's issued share capital consists of 74,238,924 ordinary shares of 1p each.

Enquiries

SDL plc
Tel: 01628 417 241
Mark Lancaster, Chief Executive
Alastair Gordon, Finance Director

Investec Investment Banking
Tel: 020 7597 4000
Andrew Pinder, Director of Corporate Finance

Investec Investment Banking, a division of Investec Bank (UK) Limited, which is authorised
and regulated by the Financial Services Authority and is a member of the London Stock
Exchange, is acting exclusively for SDL in connection with the Proposals and is not acting for
any person other than SDL and will not be responsible to any person other than SDL for
providing the protections afforded to its customers or for providing advice on the transactions
and arrangements referred to in this announcement.

About SDL

SDL is the leader in Global Information Management (GIM) solutions that empower organizations to accelerate the delivery of high-quality multilingual content to global markets. Its enterprise software and services integrate with existing business systems to manage the delivery of global information from authoring to publication and throughout the distributed translation supply chain.

Global industry leaders rely on SDL to provide enterprise software or hosted services for their GIM processes, including ABN-Amro, Best Western, Bosch, Canon, Chrysler, CNH, Hewlett-Packard, Microsoft, Philips, SAP, Sony, Sun Microsystems and Virgin Atlantic.

SDL has implemented more than 500 enterprise GIM solutions, has deployed over 170,000 software licenses across the GIM ecosystem and provides access to on-demand translation portals for 10 million customers per month. Over 1,000 service professionals deliver consulting, implementation and language services through its global infrastructure of more than 50 offices in 32 countries. For more information, visit www.sdl.com