OpenRegistry
Companies House/Edinburgh/Company profile

WASHINGTON CONSULTING INTERNATIONAL, PLC

Active
SC388838·incorporated 2010-11-15

WASHINGTON CONSULTING INTERNATIONAL, PLC is an active UK public limited company, incorporated on 15 November 2010 at Companies House (number SC388838; OpenRegistry canonical ID GB-SC388838-washington-consulting-international-plc). Sophymarine's OpenRegistry classifies it under SIC 70100 (Activities of head offices), one of 26,983 active UK entities in that code and one of 59,147 active companies registered in Edinburgh (postcode EH1). Programmatic access via MCP at https://openregistry.sophymarine.com/mcp.

Status
Active
Type
Public Limited Company
Incorporated
2010-11-15
Registered Address
8 ALBANY STREET, EDINBURGH, EH1 3QB, SCOTLAND
SIC
70100 — Activities of head offices
Country of origin
United Kingdom

Directors

Search directors of WASHINGTON CONSULTING INTERNATIONAL, PLC

Shareholders

Look up shareholders of WASHINGTON CONSULTING INTERNATIONAL, PLC

Financials

Check financials of WASHINGTON CONSULTING INTERNATIONAL, PLC

Filings

Check filing history of WASHINGTON CONSULTING INTERNATIONAL, PLC

Accounts

Last filed accounts made up to 2025-09-30. Next accounts due 2027-03-31. Financial year-end: 30/09. Filing class: DORMANT.

Confirmation statement

Last confirmation statement made up to 2025-09-30. Next confirmation statement due 2026-10-14.

Persons with significant control

WASHINGTON CONSULTING INTERNATIONAL, PLC has 2 persons with significant control on file:

  • Mark Curtis Williamson Service Group (Switzerland) Trust. Notified 2016-09-30.
    • Owns 25–50% of shares
    • Holds 25–50% of voting rights
    • Right To Appoint And Remove Directors As Trust
    • Significant Influence Or Control As Trust
  • Mr Mark Curtis Williamson born 1961 resident in United States, American national. Notified 2022-04-04.
    • Owns 50–75% of shares
    • Holds 50–75% of voting rights
    • Right To Appoint And Remove Directors As Trust
    • Significant Influence Or Control As Trust

1 historical PSC record has ceased:

  • Mark Curtis Williamson Service Group (Cayman Islands) Trust. Notified 2016-09-30. Ceased 2022-04-04.
    • Owns 25–50% of shares
    • Holds 25–50% of voting rights
    • Right To Appoint And Remove Directors As Trust
    • Significant Influence Or Control As Trust

Similar UK companies

Other companies registered under SIC 70100 (Activities of head offices):

Other companies registered in Edinburgh:

Need real-time profile, officers, shareholders, financials or filing? Open the live profile at /company/gb/SC388838.

Source: Companies House Free Company Data, refreshed 2026-05-01. Official record: find-and-update.company-information.service.gov.uk.