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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

William Callanan

    Related profiles found in government register
  • William Callanan
    American born in May 1971

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • 86, Brook Street, London, W1K 5AY, England

      IIF 1
  • Mr William Francis Callanan
    American born in May 1971

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • 1st Floor, Sackville House, 143-149 Fenchurch Street, London, EC3M 6BL, England

      IIF 2 IIF 3
  • Callanan, William Francis
    American born in May 1971

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • 1st Floor, Sackville House, 143-149 Fenchurch Street, London, EC3M 6BL, England

      IIF 4 IIF 5 IIF 6
  • Mr William Francis Callanan
    American born in May 1971

    Resident in England

    Registered addresses and corresponding companies
    • 3rd Floor, 20-22 Berkeley Square, London, W1J 6EQ, United Kingdom

      IIF 7
  • Callanan, William Francis
    born in May 1971

    Resident in England

    Registered addresses and corresponding companies
    • 1, New Burlington Place, 1st Floor, London, W1S 2HR, England

      IIF 8
    • 25-26, Bury Street, London, SW1 6AL

      IIF 9
    • 5, Savile Row, London, W1S 3PD

      IIF 10
    • 56, Conduit Street, Regent Gate, London, W1S 2YZ

      IIF 11
    • 56, Conduit Street, Regent Gate, London, W1S 2YZ, United Kingdom

      IIF 12
    • Flat 3, 41 Queen's Gate Terrace, London, SW7 5PN

      IIF 13
child relation
Offspring entities and appointments 8
  • 1
    DRAWBRIDGE (UK) LLP
    OC322152
    7 Clarges Street, Fourth Floor, London, England
    Dissolved Corporate (14 parents)
    Officer
    2007-07-01 ~ 2012-05-31
    IIF 10 - LLP Member → ME
  • 2
    ENVOICED LIMITED
    10636315
    86 Brook Street, London, England
    Dissolved Corporate (3 parents)
    Person with significant control
    2017-08-04 ~ dissolved
    IIF 1 - Ownership of shares – More than 25% but not more than 50% OE
    IIF 1 - Ownership of voting rights - More than 25% but not more than 50% OE
  • 3
    KEY SQUARE CAPITAL MANAGEMENT (UK) LLP
    OC403216
    25-26 Bury Street, London
    Dissolved Corporate (7 parents)
    Officer
    2015-12-01 ~ 2019-04-03
    IIF 9 - LLP Designated Member → ME
  • 4
    RUBICON MOUNT STREET LLP
    OC305724
    Thames House, Portsmouth Road, Esher, Surrey
    Dissolved Corporate (19 parents, 1 offspring)
    Officer
    2003-10-07 ~ 2007-05-31
    IIF 13 - LLP Designated Member → ME
  • 5
    SFM UK MANAGEMENT LLP
    OC338341
    1 New Burlington Place, 1st Floor, London, England
    Active Corporate (19 parents)
    Officer
    2012-10-22 ~ 2015-12-31
    IIF 12 - LLP Member → ME
    2015-12-31 ~ 2017-06-30
    IIF 11 - LLP Member → ME
    2017-06-30 ~ 2018-04-07
    IIF 8 - LLP Member → ME
  • 6
    SYZYGY INVESTMENT ADVISORY LIMITED
    11901054
    1st Floor Sackville House, 143-149 Fenchurch Street, London, England
    Active Corporate (2 parents)
    Officer
    2019-03-23 ~ now
    IIF 6 - Director → ME
    Person with significant control
    2019-03-23 ~ 2021-06-24
    IIF 7 - Ownership of voting rights - 75% or more OE
    IIF 7 - Ownership of shares – 75% or more OE
    IIF 7 - Right to appoint or remove directors OE
  • 7
    SYZYGY INVESTMENT HOLDINGS LTD
    13367562
    1st Floor Sackville House, 143-149 Fenchurch Street, London, England
    Active Corporate (1 parent, 1 offspring)
    Officer
    2021-04-29 ~ now
    IIF 4 - Director → ME
    Person with significant control
    2021-04-29 ~ now
    IIF 3 - Ownership of voting rights - 75% or more OE
    IIF 3 - Right to appoint or remove directors OE
    IIF 3 - Ownership of shares – 75% or more OE
  • 8
    SYZYGY-TECTONIC LIMITED
    13027484
    1st Floor Sackville House, 143-149 Fenchurch Street, London, England
    Dissolved Corporate (1 parent)
    Officer
    2020-11-18 ~ dissolved
    IIF 5 - Director → ME
    Person with significant control
    2020-11-18 ~ dissolved
    IIF 2 - Ownership of shares – 75% or more OE
    IIF 2 - Ownership of voting rights - 75% or more OE
    IIF 2 - Right to appoint or remove directors OE

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Contains public sector information retrieved at 22 March 2026 and licensed under the Open Government Licence v3.0.