Washington Consulting International, PLC
iSource and licenceOfficial record from Companies House. Governance Register calculates the connections.Register edition compiled 8 November 2026.Contains public sector information licensed under the Open Government Licence v3.0.How we handle dataOverview
Washington Consulting International, PLC's network
3 people5 organisationsExplore in 3Di2 listed on the board plus 1 company secretary. 5 organisations share a board member with this company.The large node is Washington Consulting International, PLC. The map shows two steps out from the public record. Hover a node to focus its connections; click one to open it.The board
2 listed + 1 company secretaryiDirectors and secretaries as filed at Companies House.| Name | Role | Since | On the board |
|---|---|---|---|
| Williamson Capital Advisors LLC | Corporate director | 2016 | 10y 1m |
| Mark Curtis Williamson | Director | 2010 | 15y 11m |
| Williamson Capital Advisors LLC | Corporate secretary | 2016 | 10y 1m |
Recent news and events
From the public record
- 30 September 2026Confirmation statement made up to this dateCompanies House company file
- 30 September 2025Accounts made up to this dateCompanies House company file
Appointments, resignations and filings held in the Companies House data, and insolvency notices from The Gazette (Open Government Licence v3.0).
Board
Current officers
2 + 1 company secretaryiOccupation and nationality are held for only some companies and are not held for this one. Other boards counts directorships that are current in the Companies House officer data; it does not say whether the people are the same without a matching date of birth, and is not proof of any link between the companies.| Name | Role | Appointed | Other boards |
|---|---|---|---|
| Mark Curtis Williamson | Director | 15 November 2010 | 5 other current boards |
| Williamson Capital Advisors Llc | Corporate director | 1 October 2016 | |
| Williamson Capital Advisors Llc | Corporate secretary | 1 October 2016 |
Source: Companies House officer data (appointments and resignations). Contains public sector information licensed under the Open Government Licence v3.0.
Former officers
2 listed, latest first| Name | Role | Appointed | Left |
|---|---|---|---|
| Llc Williamson Capital Advisors | Corporate secretary | 15 November 2010 | 23 August 2021 |
| Llc Williamson Capital Advisors | Corporate director | 15 November 2010 | 1 October 2016 |
When board seats may change
iTime on the board since appointment. Many boards cap service at 6 to 9 years, so long-serving seats are the ones most likely to change.Who is on the board
iCounted from the dated Companies House officer record: the current directors only, past directors excluded.How this board is put together, from the Companies House officer record and Charity Commission trustee records - deterministic, no AI.1 directors on the board
- Mark Curtis Williamson Director · appointed 2010
Directors past 6 years
- Mark Curtis Williamson Director · appointed 2010
Where else this board sits
The charitable fields these directors govern in elsewhere, by Charity Commission classification. Excludes this company and any charity it is the legal face of.
The sectors these directors govern in elsewhere. This company, and any charity it is the legal face of, are excluded - counting them would just tell you what you are already looking at.
Gaps to watch
- A single director - no second pair of eyes on any decision
Where to look Suggested search: a second director to remove single-point control.
Network
Network
iThe large node is Washington Consulting International, PLC. Red nodes are organisations, white nodes are people. Dashed links are historical or inferred. Dashed blue-grey links are company secretaries. Click any node to explore.Most connected
Working out who is most connected...
Finances
Financial history
No figures in the accounts data we hold.
Companies House shows accounts made up to 30 September 2025 (dormant). A dormant company has no significant transactions, so its accounts carry no turnover or profit. Nothing is shown rather than a guess.
Key dates and compliance
- Accounts category
- DormantThe company had no significant transactions in the year.
- Accounts last made up to
- 30 September 2025
- Next accounts due
- 31 March 2027 Not yet due
- Confirmation statement last made up to
- 30 September 2026
- Next confirmation statement due
- 14 October 2027 Not yet due
- Charges (secured loans)
- None registered
Filing history at Companies House (opens in a new tab)
Source: Companies House company file (1 October 2026) and, for new companies, the Companies Act timetable. Contains public sector information licensed under the Open Government Licence v3.0.
About
About this company
Companies House (opens in a new tab)- Company number
- SC388838
- Company type
- Public limited company
- Status
- Active
- Jurisdiction
- Scotland
- Incorporated
- 15 November 2010
- Registered office
- 8 Albany Street, Edinburgh, EH1 3QB
- Nature of business (SIC)
- 70100 Activities of head offices
- Group companies
- 3 in this ownership group See the group structure →
- Latest accounts
- 30 September 2025 (dormant)
Source: Companies House company file of 1 October 2026. Contains public sector information licensed under the Open Government Licence v3.0.
Key dates and compliance
- Accounts category
- DormantThe company had no significant transactions in the year.
- Accounts last made up to
- 30 September 2025
- Next accounts due
- 31 March 2027 Not yet due
- Confirmation statement last made up to
- 30 September 2026
- Next confirmation statement due
- 14 October 2027 Not yet due
- Charges (secured loans)
- None registered
Filing history at Companies House (opens in a new tab)
Source: Companies House company file (1 October 2026) and, for new companies, the Companies Act timetable. Contains public sector information licensed under the Open Government Licence v3.0.
Same registered address
31iMatched on postcode and first line of the registered office, from the company file of 1 October 2026. A shared address is not evidence that companies are connected.31 companies are registered at this address.
- Kleboe Ltd
- Whitelaw Brae Windfarm Limited
- Finance Business Partner Limited
- Life Light Energy Limited
- Arcata Contract Services Limited
- Arcata Accountancy Services Limited
- Energy Marketing and Trading Ltd
- Yeap Digital Ltd
- Conduit Finance Ltd
- IEM (Holdings) Ltd
- Flow-MEP Ltd
- Iem3 Ltd
- Revere Scotland Ltd.
- Marketing Co.(Scot.) Ltd
- Paytech Neo UK Ltd
- Feathercock Ltd
- Ashley Millan Ltd
- Paul Taylor Family & Civil Law Limited
- Flemings Legal Services Limited
Showing 19 of 30 other companies. 31 of the 31 are active.Show moreShow fewerShow all 30 →
Same sector and place
40iThe list starts with a sample; Show all lists every one. Matched on the main business code and postcode district, from the company file of 1 October 2026. Same sector and district is not evidence of any connection.40 other active companies have the same main business code (70100 Activities of head offices) and a registered office in the EH1 postcode district.
- Forfar Healthcare (Holdings) Limited
- SDM Partners Limited
- Harbour Energy PLC
- Murray Estates Developments Limited
- Catchment Moray Holdings Limited
- Clarkston Holdings Limited
Showing 6 of 40Show moreShow fewerShow all 40 →
Recent news and events
From the public record
- 30 September 2026Confirmation statement made up to this dateCompanies House company file
- 30 September 2025Accounts made up to this dateCompanies House company file
Appointments, resignations and filings held in the Companies House data, and insolvency notices from The Gazette (Open Government Licence v3.0).
Ownership
Group structure
3 companies- Active
- Dissolved or closed
- Other status
- Not a UK company
- Current control
- Ceased control
- Shares a director
- Bar under a name: net assets or equity, where known
Loading the group structure…
Built from the corporate people with significant control records matched to UK companies (Companies House, Open Government Licence v3.0; ownership graph of 19 September 2026). Control is shown as the nature of control the controller declared; the group count includes only active majority holdings (more than 50%), so holdings of 25-50% are drawn but not counted. Overseas parents that are not on the UK register appear only when a company names them.
People with significant control
3| Name | Control | Notified | Ceased |
|---|---|---|---|
| Mr Mark Curtis WilliamsonPerson · American |
| 4 April 2022 | Current |
| Mark Curtis Williamson Service Group (Switzerland) TrustCompany, registered in Cayman Islands · not on the UK register |
| 30 September 2016 | 30 September 2026 |
| Mark Curtis Williamson Service Group (Cayman Islands) TrustCompany, registered in Cayman Islands · not on the UK register |
| 30 September 2016 | 4 April 2022 |
1 current controller and 2 former. Addresses and birth details are not shown.
Source: Companies House people with significant control data, snapshot of 1 October 2026. Contains public sector information licensed under the Open Government Licence v3.0. Companies are linked to their page where the name matches an owner company in our ownership graph.
Companies it controls
iNo other company in our records lists this company as a person with significant control.From the people with significant control data of the companies in the Companies House company file.