---
title: "TRANSITIONZERO — Ownership Dossier"
canonical: https://whiteintel.dev/entity/4c00366c-57fd-5669-93a4-2ae6ca4bc4a6
json: https://whiteintel.dev/api/public/dossier/4c00366c-57fd-5669-93a4-2ae6ca4bc4a6
identifier: oo:GB-COH-12914740
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# TRANSITIONZERO

**Type:** Company  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `oo:GB-COH-12914740`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/4c00366c-57fd-5669-93a4-2ae6ca4bc4a6  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/4c00366c-57fd-5669-93a4-2ae6ca4bc4a6  

## Ownership & control

### Owners / controllers

- **Ms Paraskevi Bertseka** (beneficial owner) — 50% — https://whiteintel.dev/entity/a22668df-06c9-5c52-b322-f343c4c4f1c2
- **Mr Thomas David Gardner** (beneficial owner) — 50% — https://whiteintel.dev/entity/91a0d40c-65f6-52a2-aebc-2c309c65d6d2
- **Mr Geoffrey David Sinclair** (beneficial owner) — 50% — https://whiteintel.dev/entity/3e8b3547-4b59-5a66-80cd-b03b7c85fe70
- **Mr Geoffrey David Sinclair** (beneficial owner) — https://whiteintel.dev/entity/4465b0a2-8f44-46ad-9a4a-5722e4cf8180
- **Ms Paraskevi Bertseka** (beneficial owner) — https://whiteintel.dev/entity/830aaf3c-b9f6-4580-bdd8-4fe06e024a84
- **Mr Thomas David Gardner** (beneficial owner) — https://whiteintel.dev/entity/898c5a6f-31bd-4709-a5c3-918506c0a6e1

### Holdings / subsidiaries

- **TRANSITIONZERO SERVICES LTD** (beneficial owner) — 100% — https://whiteintel.dev/entity/eb57a265-e62d-57d1-a279-225dc3845309
- **TRANSITIONZERO SERVICES LTD** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/eb57a265-e62d-57d1-a279-225dc3845309

### UBO chain (walk to the ultimate owner)

A **6-step** ownership/control chain to the ultimate beneficial owner is resolved for this entity. The full cited chain unlocks with a paid API key or a one-off dossier — https://whiteintel.dev/pricing.

## Company profile (live · UK Companies House)

- **Company number:** `12914740`
- **Status:** active
- **Type:** private limited guarant nsc limited exemption
- **Incorporated:** 2020-09-30
- **Registered office:** 7 Bell Yard, London, WC2A 2JR, United Kingdom
- **SIC:** 85590

### Officers

- CHUNG, Ho Yan Yulanda — director · British · appointed 2021-10-27
- ELVESTAD, Endre Olsvik — director · Norwegian · appointed 2026-07-16
- GANDHI, Udit — director · American · appointed 2025-11-25
- GRAY, Matthew Christopher — director · New Zealander · appointed 2025-08-19
- HOWARTH, Fiona Louise — director · British · appointed 2025-11-25
- SINCLAIR, Geoffrey David — director · British · appointed 2020-09-30
- BRISTOW, Nicola Lorna — secretary · appointed 2021-10-13 · resigned 2021-12-22
- BERTSEKA, Paraskevi — director · British,Greek · appointed 2020-09-30 · resigned 2025-02-24
- FERNANDO, Arjuna Gihan — director · British · appointed 2025-02-24 · resigned 2025-12-01
- GARDNER, Thomas David — director · American · appointed 2020-09-30 · resigned 2023-10-19
- OMI, Mayumi — director · British · appointed 2021-05-25 · resigned 2025-10-30

### Beneficial owners (Persons with Significant Control)

- Ms Paraskevi Bertseka — 25–50% votes · individual PSC · England — ceased 2021-10-27
- Mr Thomas David Gardner — 25–50% votes · individual PSC · England — ceased 2021-10-27
- Mr Geoffrey David Sinclair — 25–50% votes · individual PSC · England — ceased 2021-10-27

## Provenance

- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/12914740
- companies_house_bulk — https://find-and-update.company-information.service.gov.uk/company/12914740

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **TRANSITIONZERO**. Human view: https://whiteintel.dev/entity/4c00366c-57fd-5669-93a4-2ae6ca4bc4a6 · Structured JSON: https://whiteintel.dev/api/public/dossier/4c00366c-57fd-5669-93a4-2ae6ca4bc4a6._

_Risk levels are heuristic investigative leads, not legal determinations of beneficial ownership. Every claim carries a source; an absent edge means "not yet observed in current sources", not "does not exist"._