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The above diagram shows the color scheme of the layout in the main result page. The parent entities and officers are those entities, including individual and legal persons, have significant controls over the company in focus. The offspring entities and appointments are those entities that the company 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.

Parent entities and officers
Active 4
  • 1
    Mason, Stephen John
    Born in September 1964
    Individual (65 offsprings)
    Officer
    icon of calendar 2024-07-08 ~ now
    OF - Director → CIF 0
  • 2
    Garske, Paul Martin
    Born in October 1968
    Individual (47 offsprings)
    Officer
    icon of calendar 2020-05-30 ~ now
    OF - Director → CIF 0
  • 3
    Lewis, Adam Gordon James
    Born in May 1978
    Individual (5 offsprings)
    Officer
    icon of calendar 2020-05-30 ~ now
    OF - Director → CIF 0
  • 4
    RYDBERG DEVELOPMENT COMPANY LIMITED - 2021-11-19
    icon of address100, Victoria Street, 2nd Floor Cardinal Place, London, England
    Active Corporate (4 parents, 6 offsprings)
    Person with significant control
    icon of calendar 2021-12-22 ~ now
    PE - Ownership of shares – 75% or moreCIF 0
    PE - Ownership of voting rights - 75% or moreCIF 0
    PE - Right to appoint or remove directorsCIF 0
Ceased 3
  • 1
    O'neill, Jonathan Hugh
    Company Director born in March 1957
    Individual (11 offsprings)
    Officer
    icon of calendar 2020-05-30 ~ 2024-07-08
    OF - Director → CIF 0
  • 2
    ASPATRIA POWER LIMITED - 2019-10-10
    icon of address100, Victoria Street, 2nd Floor Cardinal Place, West Building, London, United Kingdom
    Active Corporate (3 parents)
    Equity (Company account)
    100 GBP2019-12-31
    Person with significant control
    2020-05-30 ~ 2021-12-22
    PE - Right to appoint or remove directorsCIF 0
    PE - Ownership of shares – 75% or moreCIF 0
    PE - Ownership of voting rights - 75% or moreCIF 0
  • 3
    JEERAN UK LTD
    icon of address71, Queen Victoria Street, Floor 8, London, England
    Active Corporate (2 parents, 148 offsprings)
    Equity (Company account)
    498,510 GBP2022-03-31
    Officer
    2020-05-30 ~ 2021-06-30
    PE - Secretary → CIF 0
parent relation
Company in focus

HARTREE SOLUTIONS ASSETS LIMITED

Previous name
HARTREE SOLUTIONS POWER (HOLDINGS) LIMITED - 2021-09-08
Standard Industrial Classification
74909 - Other Professional, Scientific And Technical Activities N.e.c.
Brief company account
Called-up share capital not yet paid and not classified as a current asset
1 GBP2021-12-31
1 GBP2020-12-31
Net Assets/Liabilities
1 GBP2021-12-31
1 GBP2020-12-31
Number of shares allotted
Class 1 ordinary share
1 shares2021-01-01 ~ 2021-12-31
Par Value of Share
Class 1 ordinary share
1 GBP2021-01-01 ~ 2021-12-31
Equity
1 GBP2021-12-31
1 GBP2020-12-31

Related profiles found in government register
  • HARTREE SOLUTIONS ASSETS LIMITED
    Info
    HARTREE SOLUTIONS POWER (HOLDINGS) LIMITED - 2021-09-08
    Registered number 12635934
    icon of address100 Victoria Street, 2nd Floor Cardinal Place, West Building, London SW1E 5JL
    PRIVATE LIMITED COMPANY incorporated on 2020-05-30 (5 years 7 months). The company status is Active.
    The last date of confirmation statement was made at 2025-05-29
    CIF 0
  • HARTREE SOLUTIONS POWER (HOLDINGS) LIMITED
    S
    Registered number 12635934
    icon of address100, Victoria Street, 2nd Floor Cardinal Place, West Building, London, United Kingdom, SW1E 5JL
    Private Company Limited By Shares in Uk Register Of Companies, United Kingdom
    CIF 1
child relation
Offspring entities and appointments
Active 0
  • Not found in our database.
Ceased 1
  • LKAB POWER LIMITED - 2021-09-10
    icon of address100 Victoria Street, 2nd Floor Cardinal Place, West Building, London, United Kingdom
    Active Corporate (4 parents)
    Equity (Company account)
    1 GBP2020-12-31
    Person with significant control
    icon of calendar 2020-06-03 ~ 2021-12-22
    CIF 1 - Right to appoint or remove directors OE
    CIF 1 - Ownership of shares – 75% or more OE
    CIF 1 - Ownership of voting rights - 75% or more OE

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Contains public sector information retrieved at 12 November 2025 and licensed under the Open Government Licence v3.0.