Mediaocean Systems Limited

Active01622089 Private limited company
Incorporated
15 March 1982 (44 years)
Previously known as
Donovan Data Systems Limited (until 6 March 2012)
Leachford Limited (until 30 July 1982)
Industry
Business and domestic software development (62012)
Data processing, hosting and related activities (63110)
Directors
Nicholas Galassi
William Wise
Owned by
Poseidon Holding LLC
Accounts type
Group
Region
Greater London
Address
The Blue Fin Building
110 Southwark Street
London
SE1 0TA

Website & contact details

Group website
The site of this company’s group or brand.

Filing status

Accounts due
30 September 2027
Last accounts
31 December 2025
Conf. stmt due
27 October 2027
Last conf. stmt
13 October 2026

Charges

Total
4
Outstanding
0
Part satisfied
0
Satisfied
4

Officers 3 active

Officer details are public data from the Companies House register.

Galassi, Nicholas
Director · Appointed 22 September 2015
American
Born April 1973 (53)
Wise, William
Director · Appointed 22 September 2015
American
Born January 1972 (54)
Rankin, Alexander Todd
Secretary · Appointed 23 June 2010
Officer history (30 former)
23 September 2015
Resigned Begley, Michael Thomas as Director
23 September 2015
Resigned Donovan, Michael Desmond Shaun as Director
22 September 2015
Appointed Wise, William as Director
22 September 2015
Appointed Galassi, Nicholas as Director
1 October 2012
Resigned Koizim, Michael as Director
23 June 2010
Appointed Rankin, Alexander Todd as Secretary
23 June 2010
Resigned Panczak, Eric John as Secretary
14 April 2010
Appointed Begley, Michael Thomas as Director
16 June 2009
Resigned Crighton, Robert Peter as Director
16 June 2009
Appointed Koizim, Michael as Director
16 June 2009
Resigned Humphries, Christopher as Director
16 June 2009
Appointed Panczak, Eric John as Secretary
16 June 2009
Resigned Panczak, Eric John as Director
16 June 2009
Resigned Nabet, Julien as Director
1 April 2009
Resigned Lawson, Henry Clifford Ryder as Director
31 January 2009
Resigned Tomlinson, John Richard as Director
31 January 2009
Resigned Tomlinson, John Richard as Secretary
31 July 2005
Resigned Sanson, Mathilde Jeanne Madeleine as Director
15 December 2003
Resigned Macdiarmid, Alexander Hugh as Director
17 July 2002
Appointed Humphries, Christopher as Director
30 September 2001
Resigned Hoodless, Roger William as Director
16 May 2001
Appointed Sanson, Mathilde Jeanne Madeleine as Director
31 December 2000
Resigned Kornettka, Norbert as Director
18 October 2000
Resigned Friedman, Lori Aline as Director
20 September 1999
Appointed Kornettka, Norbert as Director
31 March 1999
Resigned Sidbury, David Julian as Director
6 October 1998
Resigned Solomon, David Philip as Director
29 June 1998
Appointed Tomlinson, John Richard as Director
26 May 1998
Appointed Panczak, Eric John as Director
12 January 1998
Resigned Suddards, Helen Jane as Director
1 October 1997
Appointed Tomlinson, John Richard as Secretary
30 September 1997
Resigned Hunter, Susan Elizabeth as Secretary
30 September 1997
Resigned Hunter, Susan Elizabeth as Director
31 January 1997
Resigned Rosentreter, Jurgen as Director
18 December 1996
Appointed Crighton, Robert Peter as Director
18 December 1996
Appointed Macdiarmid, Alexander Hugh as Director
31 July 1996
Appointed Rosentreter, Jurgen as Director
31 July 1996
Appointed Nabet, Julien as Director
9 November 1995
Appointed Friedman, Lori Aline as Director
20 March 1995
Appointed Hunter, Susan Elizabeth as Secretary
9 March 1995
Resigned O'Bree, Barry as Secretary
21 April 1994
Appointed Lawson, Henry Clifford Ryder as Director
21 February 1994
Appointed Hunter, Susan Elizabeth as Director
31 January 1994
Resigned Zirker, David Michael as Director
10 September 1993
Resigned Hamilton, Nicholas David as Director
6 September 1993
Appointed Zirker, David Michael as Director
30 July 1993
Resigned Newnham, John Albert as Director
30 July 1993
Resigned Macdiarmid, Alexander Hugh as Director
30 July 1993
Resigned Gutch, Timothy Clement as Director
30 July 1993
Resigned Crighton, Robert Peter as Director
4 December 1992
Resigned Roberts, Andrew Clive as Director

Ownership 1 active

People and entities with significant control, from the Companies House PSC register

Poseidon Holding LLC
Corporate entity · Notified 6 April 2016
Owns 75–100% of shares
Limited Liability Company

Filings

Recent filings only. See the full history on Companies House

DateDescriptionMade Up ToPagesPDF
11 May 2026Group of companies' accounts31 December 2025
13 October 2025Confirmation statement with no updates13 October 2025
16 July 2025Group of companies' accounts31 December 2024
14 October 2024Director's details changed
14 October 2024Confirmation statement with no updates13 October 2024
Show all recent filings

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