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Company number
01622089

MEDIAOCEAN SYSTEMS LIMITED

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

Company details

London, 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
MEDIAOCEAN SYSTEMS LIMITED
Company number
01622089
Registered office
THE BLUE FIN BUILDING, 110 SOUTHWARK STREET, LONDON, SE1 0TA · 10 other companies at this postcode
Company type
Private Limited Company
Incorporated on
15 March 1982
Status
Active
Age
44 years
Previous names
DONOVAN DATA SYSTEMS LIMITED (to 06 Mar 2012)
Nature of business (SIC)
62012 — Business and domestic software development · 63110 — Data processing, hosting and related activities
Accounts — next due
30 Sept 2027
Accounts — last made up to
31 Dec 2025
Confirmation statement — next due
27 Oct 2026
Confirmation statement — last
13 Oct 2025

People with significant control

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

Poseidon Holding Llc
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

Poseidon Holding Llc name only
owns 75–100% of shares Notified 06/04/2016

Change history

Reconstructed from the dated records Companies House publishes

DateChangeWasNow
06/04/2016 Person with significant control added Poseidon Holding Llc
06/03/2012 Registered name changed DONOVAN DATA SYSTEMS LIMITED MEDIAOCEAN SYSTEMS LIMITED

Documents for MEDIAOCEAN SYSTEMS LIMITED

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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

Registered with the Information Commissioner's Office as a data protection fee payer.

Mediaocean Systems Limited — SE1 0TA
Trading as ADSERVE COMPUTING, DONOVAN DATA SYSTEMS
Tier 2 · renews 16/06/2027
ICO entry

The ICO publishes no company number, so this is matched on the registered name and confirmed by the postcode. Check the ICO entry before relying on it.

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Frequently asked questions

What is the company number of MEDIAOCEAN SYSTEMS LIMITED?
According to the official registry, the company number of MEDIAOCEAN SYSTEMS LIMITED is 01622089.
Where is MEDIAOCEAN SYSTEMS LIMITED registered?
The registered office is THE BLUE FIN BUILDING, 110 SOUTHWARK STREET, LONDON, SE1 0TA.
What is the SIC code of MEDIAOCEAN SYSTEMS LIMITED?
The nature of business is recorded under SIC code 62012 — Business and domestic software development, 63110 — Data processing, hosting and related activities.
Who controls MEDIAOCEAN SYSTEMS LIMITED?
Poseidon Holding Llc is recorded as a person with significant control, and owns 75–100% of shares.
When are the next accounts of MEDIAOCEAN SYSTEMS LIMITED due?
The next annual accounts are due by 30 September 2027, and the last accounts were made up to 31 December 2025.

About MEDIAOCEAN SYSTEMS LIMITED (01622089)

MEDIAOCEAN SYSTEMS LIMITED is a private limited company incorporated on 15 March 1982 and registered in the United Kingdom under company number 01622089. Its registered office is at THE BLUE FIN BUILDING, 110 SOUTHWARK STREET, LONDON, SE1 0TA. The recorded nature of business is business and domestic software development (SIC 62012). The company is currently active , with statutory accounts last made up to 31 December 2025. , and the person with significant control is Poseidon Holding Llc. 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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