Private company

SDL

Logo: Deana Sergile, Public domain, via Wikimedia Commons5

British multinational professional services company

SDL plc was a British multinational professional services company based in Maidenhead, Berkshire, United Kingdom. SDL specialized in language translation software and services (including interpretation services). It was listed on the London Stock Exchange until it was acquired by RWS Group in November 2020.3 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

1992Founded1
  • Industrysoftware industry1
  • HeadquartersMaidenhead1
  • Websitewww.sdl.com
  • Legal formpublic limited company1
  • Listed onLondon Stock Exchange1
  • LEI213800OF4AGCOPWAL3414
  • StatusActive4
  • LEI statusIssued and current4
  • Registered addressRWS COMPASS HOUSE VANWALL BUSINESS PARK, SL6 4UB Maidenhead, United Kingdom4
  • Registered withCompanies House, 026752074

SDL plc was a British multinational professional services company based in Maidenhead, Berkshire, United Kingdom. SDL specialized in language translation software and services (including interpretation services). It was listed on the London Stock Exchange until it was acquired by RWS Group in November 2020.3

Corporate structure

SDL is part of a group headed by RWS Group. 8 entities, 4 countries on record. Switch between the flow chart and the network, and select any entity to see its details.

  • RWS Group Maidenhead, United Kingdom
    • Moravia IT 100% · Brno, Czechia
    • SDL Maidenhead, United Kingdom
    • Eclipse Translations Subsidiary · Alnwick
    • PROPYLON LIMITED Subsidiary · Dublin, Ireland
    • RWS MORAVIA INDIA PRIVATE LIMITED Subsidiary · Indore, India
    • RWS TRANSLATIONS LIMITED Subsidiary · Maidenhead, United Kingdom
    • SDL MULTILINGUAL SOLUTIONS PRIVATE LIMITED Subsidiary · New Delhi, India

Built from parent and subsidiary links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); subsidiaries, stakes and holdings from Wikidata (CC0). Each entity in the chart links to its source.

The story

The company was founded by Mark Lancaster with nine employees in 1992. It opened its first overseas office in France in 1996 and was first listed on the London Stock Exchange in 1999. The company grew organically and via acquisitions. SDL acquired Polylang Multimedia in 1998, International Translation & Publishing (ITP) in 2000, Alpnet in 2001, and the machine translation (MT) assets of Transparent Language in 2001. It bought Trados, a rival translation memory (TM) developer, in 2005. In 2007, the company acquired Tridion, a content management system vendor, and PASS Engineering, developers of the Passolo software.

In 2008, it bought Idiom Technologies, a global information system management business. In July 2009 SDL acquired XyEnterprise in an all-cash transaction to add XML Professional Publisher as well as Contenta content management software and LiveContent to manage and deliver XML. This unit combined with Trisoft formerly Infoshare. In December 2009, SDL acquired Fredhopper, a Dutch eCommerce onsite search and navigation, onsite targeting and targeted advertising software vendor. Later that same year, it bought Xopus, another Dutch company and the leader in online XML editing. In May 2011 SDL acquired Dutch-based Media Asset Management company, Calamares, in 2012 the campaign management and social media analytics company, Alterian, and in 2013, bemoko, a supplier of internet software for mobile devices.

In January 2016, having undertaken a strategic review, SDL announced the divestment of Fredhopper and Alterian as non-complementary to its new strategy.

In August 2020 RWS Group announced a proposed takeover of the company for £809 million. The transaction was completed on 4 November 2020.

From Wikipedia’s article on SDL plc, shared under CC BY-SA 4.0.7

Products and brands

SDL provided software for language translation purposes.

From Wikipedia’s article on SDL plc, shared under CC BY-SA 4.0.7

Subsidiaries and ownership

Parent company

From Wikidata.1

Timeline

  1. Nov 16, 2021Parent Directly consolidated by RWS Group4
  2. 1992Founded Founded1

SEC filer profile

How SDL is registered with the Securities and Exchange Commission, from its EDGAR record and the cover page of its latest annual report.

  • Name on EDGARSDL PLC2
  • CIK0001163450
  • Mailing addressDechert 2 Serjeants Inn, London United Kingdom, London, X0 000002
  • On EDGAR sinceDec 13, 20012
  • Filings8 in all: 3 (3), SC TO-T/A (3), SC 13D (1), SC TO-T (1)2

Sources

The numbers on this page point here. Each one links to the record it came from.

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