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The above diagram shows the color scheme of the layout in the main result page. The parent entities and officers who have significant controls over the individuals in focus are always inapplicable. The offspring entities and appointments are those entities that the individuals in focus can influence on.

Clicking the links on parent entities or officers, and offspring entities or managed companies will put them in focus and show upstream or downstream connections. In general, ascendant entities can be found by moving toward upstream, and descendant entities are by toward downstream. In this way, progenitor entities such as grandparent companies (parents of parent), sibling companies (children of parent), partner companies (parents of child), and progeny entities such as grandchild companies (children of child) can be found easily.

Jump to: Offsprings
Parent entities and officers
Inapplicable
parent relation
Individuals in focus

O'brien, John Michael, Mr.

    Related profiles found in government register
  • O'brien, John Michael, Mr.
    British born in March 1964

    Resident in England

    Registered addresses and corresponding companies
  • O'brien, John Michael, Mr.
    British executive vice president born in March 1964

    Resident in England

    Registered addresses and corresponding companies
    • 2, Hitachi Consulting Uk Ltd, 2 More London Riverside, London, London, SE1 2AP, United Kingdom

      IIF 6
  • O'brien, John Michael, Mr.
    British management consultant born in March 1964

    Resident in England

    Registered addresses and corresponding companies
    • Harmsworth House, 13-15 Bouverie Street, London, EC4Y 8DP, England

      IIF 7 IIF 8 IIF 9
    • Hitachi Consulting Uk Limited, 2 More London Riverside, London, SE1 2AP, England

      IIF 11
    • Hitachi Consulting Uk Limited, Harmsworth House, 13-15 Bouverie Street, London, EC4Y 8DP, England

      IIF 12 IIF 13
  • O'brien, John Michael, Mr.
    British managing director born in March 1964

    Resident in England

    Registered addresses and corresponding companies
  • O'brien, John Michael, Mr.
    born in March 1964

    Resident in England

    Registered addresses and corresponding companies
    • Collins Farm, Forest Green, Dorking, , RH5 5RX,

      IIF 17
  • Mr. John Michael O'brien
    British born in March 1964

    Resident in England

    Registered addresses and corresponding companies
    • Collins, Forest Green, Dorking, Surrey, RH5 5RX, United Kingdom

      IIF 18
child relation
Offspring entities and appointments 17
  • 1
    CELERANT CONSULTING ACQUISITIONS LIMITED
    05804408
    C/o Hitachi Vantara Limited, Sefton Park, Stoke Poges, United Kingdom
    Dissolved Corporate (18 parents, 1 offspring)
    Officer
    2013-05-01 ~ 2018-05-04
    IIF 8 - Director → ME
  • 2
    CELERANT CONSULTING HOLDINGS LIMITED
    - now 03114683
    CAMBRIDGE MANAGEMENT CONSULTING HOLDINGS LIMITED - 2001-04-19
    PETER CHADWICK HOLDINGS LIMITED - 1998-06-10
    PCH INVESTMENTS LIMITED - 1995-10-19
    C/o Hitachi Vantara Limited, Sefton Park, Stoke Poges, Buckinghamshire, United Kingdom
    Dissolved Corporate (33 parents, 3 offsprings)
    Officer
    2013-05-01 ~ 2018-05-04
    IIF 10 - Director → ME
  • 3
    CELERANT CONSULTING INVESTMENTS LIMITED
    05804397
    C/o Hitachi Vantara Limited, Sefton Park, Stoke Poges, Buckinghamshire, United Kingdom
    Dissolved Corporate (28 parents, 1 offspring)
    Officer
    2014-11-21 ~ 2018-05-04
    IIF 16 - Director → ME
  • 4
    CELERANT CONSULTING RUSSIA LIMITED
    05015871
    Fifth Floor, Forum, St. Paul's, Gutter Lane, London, England
    Dissolved Corporate (17 parents)
    Officer
    2013-05-01 ~ 2018-05-04
    IIF 13 - Director → ME
  • 5
    CELERANT TRUSTEES LIMITED
    05823241
    Hitachi Consulting Uk Limited, 2 More London Riverside, London
    Dissolved Corporate (11 parents)
    Officer
    2013-05-01 ~ dissolved
    IIF 11 - Director → ME
  • 6
    CELERANT UNLIMITED
    07687789
    Fifth Floor, Forum, St. Paul's, Gutter Lane, London, England
    Dissolved Corporate (13 parents)
    Officer
    2013-05-01 ~ 2018-05-04
    IIF 12 - Director → ME
  • 7
    CELERANT US LIMITED
    07687832
    Fifth Floor, Forum, St. Paul's, Gutter Lane, London, England
    Dissolved Corporate (12 parents)
    Officer
    2013-05-01 ~ 2018-05-04
    IIF 7 - Director → ME
  • 8
    ERNST & YOUNG LLP
    OC300001 02067678... (more)
    1 More London Place, London
    Active Corporate (1955 parents, 17 offsprings)
    Officer
    2005-07-02 ~ 2007-04-30
    IIF 17 - LLP Member → ME
  • 9
    HITACHI CONSULTING (UAE) LIMITED
    - now 02155379 05660638
    CELERANT CONSULTING LIMITED
    - 2015-09-15 02155379
    CAMBRIDGE MANAGEMENT CONSULTING LIMITED - 2001-04-19
    PETER CHADWICK LIMITED - 1998-06-10
    WINSFORGE LIMITED - 1987-09-01
    C/o Hitachi Vantara Limited, Sefton Park, Stoke Poges, Buckinghamshire, United Kingdom
    Dissolved Corporate (35 parents)
    Officer
    2013-05-01 ~ 2018-05-04
    IIF 9 - Director → ME
  • 10
    HITACHI CONSULTING EUROPE LIMITED
    05660639
    C/o Hitachi Vantara Limited, Sefton Park, Stoke Poges, Buckinghamshire, United Kingdom
    Dissolved Corporate (30 parents, 3 offsprings)
    Officer
    2014-11-21 ~ 2018-05-04
    IIF 15 - Director → ME
  • 11
    HITACHI CONSULTING UK LIMITED
    05660638 02155379
    C/o Hitachi Vantara Limited 14th Floor, Broadgate Tower, 20 Primrose Street, London
    Dissolved Corporate (30 parents, 5 offsprings)
    Officer
    2014-11-21 ~ 2018-05-04
    IIF 14 - Director → ME
  • 12
    INFORMATION MANAGEMENT GROUP LTD
    03780580
    Fifth Floor, Forum, St. Paul's, Gutter Lane, London, England
    Dissolved Corporate (12 parents)
    Officer
    2014-06-04 ~ 2018-05-04
    IIF 6 - Director → ME
  • 13
    JMOB SERVICES LTD
    11649527
    Collins, Forest Green, Dorking, Surrey, United Kingdom
    Active Corporate (1 parent)
    Officer
    2018-10-30 ~ now
    IIF 1 - Director → ME
    Person with significant control
    2018-10-30 ~ now
    IIF 18 - Ownership of shares – 75% or more OE
    IIF 18 - Ownership of voting rights - 75% or more OE
    IIF 18 - Right to appoint or remove directors OE
  • 14
    NASHTECH GLOBAL I LIMITED
    - now 16095373 16095477... (more)
    NECTAR HOLDING I (UK) LIMITED
    - 2025-02-14 16095373 16095477... (more)
    Suite 1, 7th Floor 50 Broadway, London, United Kingdom
    Active Corporate (5 parents, 1 offspring)
    Officer
    2025-01-22 ~ now
    IIF 5 - Director → ME
  • 15
    NASHTECH GLOBAL II LIMITED
    - now 16095477 16095373... (more)
    NECTAR HOLDING II (UK) LIMITED
    - 2025-02-14 16095477 16095373... (more)
    Suite 1, 7th Floor 50 Broadway, London, United Kingdom
    Active Corporate (6 parents, 1 offspring)
    Officer
    2025-02-07 ~ now
    IIF 3 - Director → ME
  • 16
    NASHTECH GLOBAL LIMITED
    - now 16095557 16095373... (more)
    NECTAR HOLDING III (UK) LIMITED
    - 2025-02-14 16095557 16095477... (more)
    Suite 1, 7th Floor 50 Broadway, London, United Kingdom
    Active Corporate (6 parents, 1 offspring)
    Officer
    2025-02-07 ~ now
    IIF 2 - Director → ME
  • 17
    NASHTECH LIMITED
    09834873
    85 Gresham Street, London, England
    Active Corporate (12 parents)
    Officer
    2024-07-01 ~ now
    IIF 4 - Director → ME

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Contains public sector information retrieved at 5 April 2026 and licensed under the Open Government Licence v3.0.