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Company number
01787682

TSC SUBSEA LTD

Active
✓ Active company on the official register. Next accounts due 30 September 2026.

Company details

South East, 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
TSC SUBSEA LTD
Company number
01787682
Registered office
415C MARGARET POWELL HOUSE, MIDSUMMER BOULEVARD, MILTON KEYNES, MK9 3BN, UNITED KINGDOM · 139 other companies at this postcode
Company type
Private Limited Company
Incorporated on
31 January 1984
Status
Active
Age
42 years
Previous names
TECHNICAL SOFTWARE CONSULTANTS LIMITED (to 11 Oct 2019)
Nature of business (SIC)
26511 — Manufacture of electronic measuring, testing etc. equipment, not for industrial process control · 71122 — Engineering related scientific and technical consulting activities · 77390 — Renting and leasing of other machinery, equipment and tangible goods n.e.c.
Accounts — next due
30 Sept 2026
Accounts — last made up to
31 Dec 2024
Confirmation statement — next due
17 Jul 2027
Confirmation statement — last
03 Jul 2026

People with significant control

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

Aquaso Limited
owns 75–100% of shares
Notified 06/04/2016
Eddyfi Holding Uk Ltd
owns 75–100% of shares · holds 75–100% of voting rights
Notified 25/09/2017
Mr Martin Theriault
holds 75–100% of voting rights
Notified 16/05/2017
Ndt Global Holding Inc.
owns 75–100% of shares · holds 75–100% of voting rights
Notified 06/08/2025

Corporate structure

Who controls this company, and who they control in turn

4 controllers Drag to move · scroll to zoom · double-click to expand
Company Person Current control Ended

Connections

Ndt Global Holding Inc. name only
owns 75–100% of shares · holds 75–100% of votes Notified 06/08/2025
Aquaso Limited
owns 75–100% of shares Control ended 25/09/2017
Corporate owner owns 75–100% of shares · holds 75–100% of votes Control ended 06/08/2025
Mr Martin Theriault
born 02/1970 · Canada holds 75–100% of votes Control ended 25/09/2017 Controls 3 companies

Change history

Reconstructed from the dated records Companies House publishes

DateChangeWasNow
06/08/2025 Person with significant control ceased Eddyfi Holding Uk Ltd
06/08/2025 Person with significant control added Ndt Global Holding Inc.
11/10/2019 Registered name changed TECHNICAL SOFTWARE CONSULTANTS LIMITED TSC SUBSEA LTD
25/09/2017 Person with significant control ceased Mr Martin Theriault
25/09/2017 Person with significant control ceased Aquaso Limited
25/09/2017 Person with significant control added Eddyfi Holding Uk Ltd
16/05/2017 Person with significant control added Mr Martin Theriault
06/04/2016 Person with significant control added Aquaso Limited

Documents for TSC SUBSEA LTD

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Company extract£1.99

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Financial statements£3.99

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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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Frequently asked questions

What is the company number of TSC SUBSEA LTD?
According to the official registry, the company number of TSC SUBSEA LTD is 01787682.
Where is TSC SUBSEA LTD registered?
The registered office is 415C MARGARET POWELL HOUSE, MIDSUMMER BOULEVARD, MILTON KEYNES, MK9 3BN, UNITED KINGDOM.
What is the SIC code of TSC SUBSEA LTD?
The nature of business is recorded under SIC code 26511 — Manufacture of electronic measuring, testing etc. equipment, not for industrial process control, 71122 — Engineering related scientific and technical consulting activities, 77390 — Renting and leasing of other machinery, equipment and tangible goods n.e.c..
Who controls TSC SUBSEA LTD?
Aquaso Limited is recorded as a person with significant control, and owns 75–100% of shares.
When are the next accounts of TSC SUBSEA LTD due?
The next annual accounts are due by 30 September 2026, and the last accounts were made up to 31 December 2024.

About TSC SUBSEA LTD (01787682)

TSC SUBSEA LTD is a private limited company incorporated on 31 January 1984 and registered in the United Kingdom under company number 01787682. Its registered office is at 415C MARGARET POWELL HOUSE, MIDSUMMER BOULEVARD, MILTON KEYNES, MK9 3BN, UNITED KINGDOM. The recorded nature of business is manufacture of electronic measuring, testing etc. equipment, not for industrial process control (SIC 26511). The company is currently active , with statutory accounts last made up to 31 December 2024. , and the person with significant control is Aquaso Limited. 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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