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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

Mantz, John Martin

    Related profiles found in government register
  • Mantz, John Martin
    British accountant born in October 1948

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • 1 Great Tower Street, London, EC3R 5AA

      IIF 1
  • Mantz, John Martin
    British businessman born in October 1948

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • 30, Fenchurch Avenue, London, EC3M 5AD, England

      IIF 2
  • Mantz, John Martin
    British chartered accountant born in October 1948

    Resident in United Kingdom

    Registered addresses and corresponding companies
  • Mantz, John Martin
    British non-executive director born in October 1948

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • 1, Great Tower Street, London, EC3R 5AA

      IIF 8
  • Mantz, John Martin
    British accountant born in October 1948

    Registered addresses and corresponding companies
  • Mantz, John Martin
    British insurance official born in October 1948

    Registered addresses and corresponding companies
    • 5 Selbourne Road, Guildford, Surrey, GU4 7JP

      IIF 11
  • Mantz, John Martin
    British

    Registered addresses and corresponding companies
    • 21 Four Wents, Cobham, Surrey, KT11 2NE

      IIF 12
  • Mantz, John Martin
    British chartered accountant

    Registered addresses and corresponding companies
child relation
Offspring entities and appointments 9
  • 1
    AMTRUST AT LLOYD'S LIMITED
    - now 03043923
    SAGICOR AT LLOYD'S LIMITED
    - 2013-12-30 03043923
    GERLING AT LLOYD'S LIMITED
    - 2007-09-03 03043923
    OWEN AND WILBY UNDERWRITING AGENCY LIMITED - 1999-09-20
    FLIGHTHARE LIMITED - 1995-07-06
    Exchequer Court, 33 St Mary Axe, London, United Kingdom
    Dissolved Corporate (51 parents)
    Officer
    2003-11-07 ~ 2006-11-24
    IIF 10 - Director → ME
    2006-11-24 ~ 2014-04-07
    IIF 1 - Director → ME
    2003-09-15 ~ 2005-07-19
    IIF 13 - Secretary → ME
  • 2
    AMTRUST CORPORATE MEMBER TWO LIMITED
    - now 05264527 03621278
    SAGICOR CORPORATE CAPITAL TWO LIMITED
    - 2013-12-30 05264527 03621278
    CANOPIUS CAPITAL FIVE LIMITED - 2008-04-02
    Exchequer Court, 33 St Mary Axe, London, England
    Active Corporate (25 parents)
    Officer
    2009-11-12 ~ 2014-04-07
    IIF 6 - Director → ME
  • 3
    AMTRUST SYNDICATE HOLDINGS LIMITED
    - now 03043381
    SAGICOR SYNDICATE HOLDINGS LIMITED
    - 2013-12-30 03043381
    GERLING SYNDICATE HOLDINGS LIMITED
    - 2007-09-03 03043381
    OWL HOLDINGS LIMITED - 1999-09-01
    PINELEAD LIMITED - 1995-07-07
    Exchequer Court, 33 St Mary Axe, London, England
    Dissolved Corporate (36 parents, 3 offsprings)
    Officer
    2009-11-12 ~ 2014-04-07
    IIF 3 - Director → ME
    2004-03-25 ~ 2005-09-19
    IIF 12 - Secretary → ME
  • 4
    AMTRUST SYNDICATE SERVICES LIMITED
    - now 03621999 04434499
    SAGICOR SYNDICATE SERVICES LIMITED
    - 2013-12-30 03621999
    GERLING SYNDICATE SERVICES LIMITED
    - 2007-09-03 03621999
    OWL INSURANCE SERVICES LIMITED - 1999-09-07
    FENSCALE LIMITED - 1998-11-27
    Exchequer Court, 33 St Mary Axe, London, England
    Dissolved Corporate (37 parents)
    Officer
    2009-11-12 ~ 2014-04-07
    IIF 4 - Director → ME
    2003-09-15 ~ 2005-07-19
    IIF 14 - Secretary → ME
  • 5
    AMTRUST UNDERWRITING LIMITED
    - now 03908537
    SAGICOR UNDERWRITING LIMITED
    - 2014-01-07 03908537
    BYRNE & STACEY UNDERWRITING LIMITED - 2008-07-01
    Exchequer Court, 33 St Mary Axe, London, England
    Dissolved Corporate (32 parents)
    Officer
    2009-11-12 ~ 2014-04-07
    IIF 8 - Director → ME
  • 6
    FLECTAT 2 LTD - now
    AMTRUST CORPORATE MEMBER LIMITED
    - 2019-10-25 03621278 05264527
    SAGICOR CORPORATE CAPITAL LIMITED
    - 2013-12-30 03621278 05264527
    GERLING CORPORATE CAPITAL LIMITED
    - 2007-09-03 03621278
    OWL CORPORATE LIMITED - 1999-09-07
    PALEGROVE COMPUTERS LIMITED - 1998-10-09
    Floor 29 22 Bishopsgate, London, United Kingdom
    Active Corporate (52 parents)
    Officer
    2009-11-12 ~ 2014-04-07
    IIF 5 - Director → ME
    2003-11-07 ~ 2006-11-24
    IIF 9 - Director → ME
    2003-09-15 ~ 2005-04-28
    IIF 15 - Secretary → ME
  • 7
    R&Q REINSURANCE COMPANY (UK) LIMITED - now
    BRANDYWINE REINSURANCE COMPANY (UK) LIMITED - 2006-07-11
    CIGNA REINSURANCE COMPANY (UK) LIMITED
    - 1999-09-03 01315641
    INA REINSURANCE COMPANY (U.K.) LIMITED
    - 1988-03-31 01315641
    3 Lloyd's Avenue, London, England
    Active Corporate (32 parents)
    Officer
    ~ 1993-09-21
    IIF 11 - Director → ME
  • 8
    SIRIUS INTERNATIONAL MANAGING AGENCY LIMITED
    08536887
    3rd Floor Siriuspoint, 33 Gracechurch Street, London, United Kingdom
    Active Corporate (25 parents)
    Officer
    2014-05-28 ~ 2019-10-31
    IIF 7 - Director → ME
  • 9
    STARR MANAGING AGENTS LIMITED
    06265337
    30 Fenchurch Avenue, London
    Active Corporate (34 parents)
    Officer
    2014-05-19 ~ 2018-03-31
    IIF 2 - Director → ME

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Contains public sector information retrieved at 9 February 2026 and licensed under the Open Government Licence v3.0.