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Company · London

Diamond Transmission Partners RB (Holdings) Limited

Transmission of electricity

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Official record Companies House · updated 27th September 2026 · Sources

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The large node is Diamond Transmission Partners RB (Holdings) Limited. Red nodes are organisations, white nodes are people. Sign in free to explore further.

Who leads it

Previous officers 7

  1. Matthew John Pitts 2019-2025 Director View profile
  2. David Alexander John Foot 2019-2022 Director View profile
  3. Yasushi Umemura 2018-2019 Director View profile
  4. Kwansoo Lee 2018-2019 Director View profile
  5. Hiromasa Ihara 2016-2018 Director View profile
  6. Gary Thornton 2016-2026 Director View profile
  7. Satoshi Shimizu 2016-2017 Director View profile

Directors and secretaries as filed at Companies House.

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About

What it does
Transmission of electricity
Incorporated
31/10/2016
Registered office
London

Ownership

Owned by (3) iOwned byIndividuals and companies registered as having significant control over this company, from the Companies House PSC (persons with significant control) register. People whose ownership could not be confirmed to one individual are not listed as confirmed owners.

Group

  1. Diamond Transmission Partners RB (Holdings) Limited is controlled by Infrastructure Investments Ofto 1 Limited
    Evidence
    active 25-50% shares, 25-50% voting · notified 2019-08-21 · source: Companies House PSC register
  2. Infrastructure Investments Ofto 1 Limited is controlled by Infrastructure Investments PPP Ofto LLP
    Evidence
    active 75-100% shares, 75-100% voting, appoints directors · notified 2022-05-09 · source: Companies House PSC register
  3. Infrastructure Investments PPP Ofto LLP is controlled by Infrastructure Investments PPP Ofto Midco LLP
    Evidence
    active 50-75% voting (LLP), 75-100% surplus assets (LLP) · notified 2022-03-03 · source: Companies House PSC register
  4. Infrastructure Investments PPP Ofto Midco LLP is controlled by Infrastructure Investments PPP Ofto Holdings LLP
    Evidence
    active 50-75% voting (LLP), 75-100% surplus assets (LLP) · notified 2022-02-03 · source: Companies House PSC register
  5. Infrastructure Investments PPP Ofto Holdings LLP is controlled by Infrastructure Investments (Australia) LLP
    Evidence
    active 50-75% voting (LLP), 75-100% surplus assets (LLP) · notified 2022-02-02 · source: Companies House PSC register
  6. Infrastructure Investments (Australia) LLP is controlled by Infrastructure Investments General Partner Limited
    Evidence
    active 25-50% voting (LLP), 75-100% surplus assets (LLP) · notified 2016-04-06 · source: Companies House PSC register
  7. Infrastructure Investments General Partner Limited is controlled by Infrared (Infrastructure) Capital Partners Limited
    Evidence
    active 75-100% shares, 75-100% voting, appoints directors · notified 2016-04-06 · source: Companies House PSC register
  8. Infrared (Infrastructure) Capital Partners Limited is controlled by Infrared Capital Partners (Holdco) Limited
    Evidence
    active 75-100% shares, 75-100% voting, appoints directors · notified 2016-04-06 · source: Companies House PSC register
  9. Infrared Capital Partners (Holdco) Limited is controlled by Infrared Partners LLP
    Evidence
    active 75-100% shares, 75-100% voting, appoints directors · notified 2016-04-06 · source: Companies House PSC register
  10. Infrared Partners LLP is controlled by Werner Marc Friedrich Von Guionneau
    Evidence
    ceased significant influence (LLP) · notified 2016-04-06, ceased 2023-07-01 · source: Companies House PSC register

Ultimately controlled by Werner Marc Friedrich Von Guionneau.

444 other companies in this group

Ownership paths are calculated from Companies House persons-with-significant-control filings. Each step shows the filed nature of control and dates; a step marked "ceased" is historical, not current.

Financials

Employees
0
Turnover
Not reported (small or micro-entity accounts)
Profit/loss
£57,000

Figures from accounts filed at Companies House (iXBRL), period ending 2025-03-31. Where turnover is absent, small and micro-entity accounts are not required to report it, so it is not shown as zero.

Board analysis

Board DNA

How this board is put together, from the Companies House officer record and Charity Commission trustee records - deterministic, no AI.iBoard compositionCounted from the dated Companies House officer record: the current directors only, past directors excluded.

4 directors on the board

3.1y median 2.6y
average tenure
6.9y
longest tenure

Directors past 6 years

First-time vs portfolio directors

Portfolio (4)

0
also govern a charity

Left in the last 12 months

Where else this board sits iWhere else this board sitsThe charitable fields these directors govern in elsewhere, by Charity Commission classification. Excludes this company and any charity it is the legal face of.

Utilities 49Professional services 7Business services 6Health and social care 6Finance 5Construction 3Dormant 3Property 2

The sectors these directors govern in elsewhere. This company, and any charity it is the legal face of, are excluded - counting them would just tell you what you are already looking at.

Sources

Official record from Companies House. Governance Register calculates the connections.

Record details
Company number
10454309
Status
Active
Type
Private Limited Company
Accounts next due
31/12/2026
Edition
Register edition compiled 27th September 2026
Labels
Official record from Companies House · Calculated derived by Governance Register.

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