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Company number
05351402

CASTLE SUPPORT SERVICES PLC

Active
✓ Active company on the official register. Next accounts due 30 June 2027.

Company details

Yorkshire and The Humber, England Contains OS data © Crown copyright and database right. Contains Royal Mail data © Royal Mail copyright and database right. Source: Office for National Statistics licensed under the Open Government Licence v.3.0.
Registered name
CASTLE SUPPORT SERVICES PLC
Company number
05351402
Registered office
C/O SULZER (UK) HOLDINGS LIMITED, MANOR MILL LANE, LEEDS, LS11 8BR, ENGLAND · 14 other companies at this postcode
Company type
Public Limited Company
Incorporated on
3 February 2005
Status
Active
Age
21 years
Previous names
CASTLE ACQUISITIONS PLC (to 18 Jun 2007)
Nature of business (SIC)
74990 — Non-trading company non trading
Accounts — next due
30 Jun 2027
Accounts — last made up to
31 Dec 2025
Confirmation statement — next due
30 Jan 2027
Confirmation statement — last
16 Jan 2026

What the register says

Facts from the register, with the dates they are filed under. Not a score: what they mean is for you to judge, and every line can be checked against Companies House itself.

Companies House register snapshot, read 02/09/2026.

People with significant control

Beneficial owners holding over 25% of shares, voting rights or the right to appoint directors

Sulzer (Uk) Holdings Ltd
owns 75–100% of shares
Notified 06/04/2016

Corporate structure

Who controls this company, and who they control in turn

1 controller Drag to move · scroll to zoom · double-click to expand
Company Person Current control Ended

Connections

Corporate owner owns 75–100% of shares Notified 06/04/2016 Controls 12 companies

Change history

Reconstructed from the dated records Companies House publishes

DateChangeWasNow
06/04/2016 Person with significant control added Sulzer (Uk) Holdings Ltd
18/06/2007 Registered name changed CASTLE ACQUISITIONS PLC CASTLE SUPPORT SERVICES PLC

Documents for CASTLE SUPPORT SERVICES PLC

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Company extract£1.99

The full registration record as held today — name, number, status, registered office, company type, previous names, officers, PSC and SIC codes, timestamped for your file.

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Financial statements£3.99

Every figure the company’s own accounts state, across each filed period, with year-on-year movement. Most UK companies file small or micro-entity accounts — a balance sheet and a headcount, no turnover or profit.

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Ownership report£3.99

Who controls the company: persons with significant control, the nature of that control, the ownership graph and every other company those controllers hold.

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Data protection register

No entry found on the ICO register of fee payers under this name.

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Get this company via API

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GET /v1/company/gb/05351402
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Read the API docs

Frequently asked questions

What is the company number of CASTLE SUPPORT SERVICES PLC?
According to the official registry, the company number of CASTLE SUPPORT SERVICES PLC is 05351402.
Where is CASTLE SUPPORT SERVICES PLC registered?
The registered office is C/O SULZER (UK) HOLDINGS LIMITED, MANOR MILL LANE, LEEDS, LS11 8BR, ENGLAND.
What is the SIC code of CASTLE SUPPORT SERVICES PLC?
The nature of business is recorded under SIC code 74990 — Non-trading company non trading.
Who controls CASTLE SUPPORT SERVICES PLC?
Sulzer (Uk) Holdings Ltd is recorded as a person with significant control, and owns 75–100% of shares.
When are the next accounts of CASTLE SUPPORT SERVICES PLC due?
The next annual accounts are due by 30 June 2027, and the last accounts were made up to 31 December 2025.

About CASTLE SUPPORT SERVICES PLC (05351402)

CASTLE SUPPORT SERVICES PLC is a public limited company incorporated on 3 February 2005 and registered in the United Kingdom under company number 05351402. Its registered office is at C/O SULZER (UK) HOLDINGS LIMITED, MANOR MILL LANE, LEEDS, LS11 8BR, ENGLAND. The recorded nature of business is non-trading company non trading (SIC 74990). The company is currently active , with statutory accounts last made up to 31 December 2025. , and the person with significant control is Sulzer (Uk) Holdings Ltd. This profile is provided by opendata.bot by Noetikos, aggregating official data from Companies House bulk data , last refreshed 2 September 2026.

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