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.
Jump to: Company in focus,
Offsprings
Parent entities and officers
6
- 1
Garske, Paul Martin
Born in October 1968Individual (57 offsprings)Officer2016-02-18 ~ nowOF - Director → CIF 0 - 2
O'neill, Jonathan Hugh
Company Director born in March 1957Individual (44 offsprings)Officer2016-02-18 ~ 2024-07-08OF - Director → CIF 0 - 3
Semlitz, Stephen Michael
Born in February 1953Individual (48 offsprings)Officer2016-02-18 ~ nowOF - Director → CIF 0 - 4
Mason, Stephen John
Born in September 1964Individual (71 offsprings)Officer2024-07-08 ~ nowOF - Director → CIF 0 - 5HESS ENERGY POWER & GAS COMPANY (UK) LIMITED - 2015-02-132nd Floor, Cardinal Place, 100, Victoria Street, London, EnglandActive Corporate (12 parents, 19 offsprings)Person with significant control2016-04-06 ~ 2020-03-16PE - Ownership of voting rights - 75% or more → CIF 0PE - Right to appoint or remove directors → CIF 0PE - Ownership of shares – 75% or more → CIF 0
- 6BREAMS REGISTRARS AND NOMINEES LIMITED - 2016-08-17 01057895BREAMS NOMINEES LIMITED - 1981-12-31W.B. TRUSTEES LIMITED - 1976-12-31Floor 8, 71, Queen Victoria Street, London, EnglandActive Corporate (44 parents, 465 offsprings)Officer2016-02-18 ~ 2021-06-30OF - Secretary → CIF 0
Company in focus
HARTREE PARTNERS POWER HOLDINGS (UK) LIMITED
Period: 2016-02-18 ~ now
Company number: 10013510
Registered name
HARTREE PARTNERS POWER HOLDINGS (UK) LIMITED - now 16127362
Standard Industrial Classification
74909 - Other Professional, Scientific And Technical Activities N.e.c.
Related profiles found in government register
- Registered number 10013510
HARTREE PARTNERS POWER HOLDINGS (UK) LIMITED
Info2nd Floor, Cardinal Place, 100 Victoria Street, London SW1E 5JLPRIVATE LIMITED COMPANY incorporated on 2016-02-18 (10 years 1 month). The company status is Active.The last date of confirmation statement was made at 2025-05-01CIF 0 HARTREE PARTNERS POWER HOLDINGS (UK) LIMITED
SRegistered number 100135102nd Floor, Cardinal Place, 100, Victoria Street, London, England, SW1E 5JLPrivate Limited Company in Companies House, England And WalesCIF 1HARTREE PARTNERS POWER HOLDINGS (UK) LIMITED
SRegistered number 10013510Level 8, 123 Buckingham Palace Road, London, England, SW1W 9SHCompanies Act 2006 in Companies House - England And Wales Companies Registry, EnglandCIF 2Private Company Limited By Shares in Companies House, EnglandCIF 3
Offspring entities and appointments
7
- 1GILWILLY POWER LIMITED - 2019-10-112nd Floor, Cardinal Place, 100 Victoria Street, LondonActive Corporate (7 parents)Person with significant control2022-12-29 ~ nowCIF 4 - Ownership of shares – 75% or more → OECIF 4 - Right to appoint or remove directors → OECIF 4 - Ownership of voting rights - 75% or more → OE
- 22nd Floor Cardinal Place, 100 Victoria Street, London, United KingdomActive Corporate (4 parents, 3 offsprings)Person with significant control2025-12-22 ~ nowCIF 5 - Ownership of shares – 75% or more → OECIF 5 - Right to appoint or remove directors → OECIF 5 - Ownership of voting rights - 75% or more → OE
- 3
LAMBS FIELD LIMITED
- 2019-10-09 103056642nd Floor, Cardinal Place, 100 Victoria Street, London, EnglandActive Corporate (6 parents, 3 offsprings)Person with significant control2016-08-01 ~ nowCIF 2 - Ownership of voting rights - 75% or more → OECIF 2 - Right to appoint or remove directors → OECIF 2 - Ownership of shares – 75% or more → OE - 4
ST HELEN'S POWER LIMITED
- 2020-05-26 103351962nd Floor, Cardinal Place, 100 Victoria Street, London, EnglandActive Corporate (7 parents, 3 offsprings)Person with significant control2018-05-01 ~ nowCIF 6 - Ownership of voting rights - 75% or more → OECIF 6 - Ownership of shares – 75% or more → OECIF 6 - Right to appoint or remove directors → OE - 5
RYDBERG DEVELOPMENT COMPANY LIMITED
- 2021-11-19 100130252nd Floor, Cardinal Place, 100 Victoria Street, London, EnglandActive Corporate (6 parents, 8 offsprings)Person with significant control2016-05-06 ~ nowCIF 3 - Ownership of shares – 75% or more → OECIF 3 - Right to appoint or remove directors → OECIF 3 - Ownership of voting rights - 75% or more → OE - 6
KINGSMOOR POWER LIMITED
100129892nd Floor, Cardinal Place, 100 Victoria Street, London, EnglandActive Corporate (7 parents)Person with significant control2016-04-06 ~ 2020-01-22CIF 1 - Right to appoint or remove directors → OECIF 1 - Ownership of shares – 75% or more → OECIF 1 - Ownership of voting rights - 75% or more → OE - 7
POWERTREE (HOLDINGS) LIMITED
10066723Strelley Hall Main Street, Strelley, Nottingham, EnglandActive Corporate (6 parents, 4 offsprings)Person with significant control2017-03-15 ~ nowCIF 7 - Ownership of shares – More than 50% but less than 75% → OE
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Contains public sector information retrieved at 9 February 2026 and
licensed under the Open Government Licence v3.0.