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Private company

Westlaw

Logo: Taken from the http://www.westlaw.com ., Non-free logo, via Wikipedia3

Online legal research service

Westlaw is an online legal research service and proprietary database for lawyers and legal professionals available in over 60 countries. Information resources on Westlaw include more than 40,000 databases of case law, state and federal statutes, administrative codes, newspaper and magazine articles, public records, law journals, law reviews, treatises, legal forms and other information resources.2 It is part of Thomson Reuters.1 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

1975Founded1

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Westlaw is an online legal research service and proprietary database for lawyers and legal professionals available in over 60 countries. Information resources on Westlaw include more than 40,000 databases of case law, state and federal statutes, administrative codes, newspaper and magazine articles, public records, law journals, law reviews, treatises, legal forms and other information resources.2

Corporate structure

Westlaw is part of a group headed by The Woodbridge Company. 29 entities, 9 countries on record. Switch between the flow chart and the network, and select any entity to see its details.

  • The Woodbridge Company Toronto
    • Thomson Reuters Toronto, Ontario, Canada
      • Westlaw
      • Breakingviews Subsidiary
      • Carswell Subsidiary · Toronto
      • Incomes Data Services Subsidiary · London
      • ITN Subsidiary · 200 Gray's Inn Road
      • Pricing Partners Cie Subsidiary · Paris
      • Reuters Subsidiary · London
      • Sweet & Maxwell Subsidiary · London
      • Thomson Reuters (United States) Subsidiary · New York City, United States
      • Thomson Reuters Aranzadi Subsidiary · Cizur Menor
      • West Subsidiary · Eagan
      • THOMSON REUTERS (PROFESSIONAL) UK LIMITED Subsidiary · 100% · London, United Kingdom
      • Canada Law Book Subsidiary
      • Pondera Solutions Subsidiary
      • Reuters TV Subsidiary · United States
      • Thomson Reuters (Brazil) Subsidiary · Brazil
      • Thomson Reuters (Switzerland) Subsidiary · Switzerland
      • Thomson Reuters (United Kingdom) Subsidiary · United Kingdom
      • THOMSON REUTERS CANADA LIMITED Subsidiary · Toronto, Ontario, Canada
        • THOMSON REUTERS SPECIAL SERVICES LLC Subsidiary · Mclean, Virginia, United States
      • THOMSON REUTERS CORPORATION PTE. LTD. Subsidiary · Singapore, Singapore
        • THOMSON REUTERS CORPORATION PTE. LTD. - PHILIPPINE BRANCH Branch · Singapore, Singapore
      • THOMSON REUTERS FINANCE S.A. Subsidiary · Luxembourg, Luxembourg
        • FINANCIAL & RISK REST OF WORLD HOLDINGS LIMITED Subsidiary · London, United Kingdom
        • THOMSON REUTERS ENTERPRISE CENTRE GMBH Subsidiary · Zug, Switzerland
    • CTVglobemedia Subsidiary · Toronto

Built from parent and subsidiary links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); subsidiaries, stakes and holdings from Wikidata (CC0); major holders from Schedules 13D and 13G. Each entity in the chart links to its source.

Subsidiaries and ownership

Parent company

Owners

From Wikidata.1

Timeline

  1. 2008Acquired Acquired by Thomson Reuters1
  2. 1975Acquired Acquired by West1
  3. 1975Founded Founded1

Sources

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

  1. 1
  2. 2
  3. 3