---
title: "PORTSDOWN MANAGEMENT LIMITED — Ownership Dossier"
canonical: https://whiteintel.dev/entity/3da2a587-cb55-5532-8fe2-0efb5ee7968a
json: https://whiteintel.dev/api/public/dossier/3da2a587-cb55-5532-8fe2-0efb5ee7968a
identifier: oo:GB-COH-10110604
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# PORTSDOWN MANAGEMENT LIMITED

**Type:** Company  
**Jurisdiction:** GB  
**Identifier:** `oo:GB-COH-10110604`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/3da2a587-cb55-5532-8fe2-0efb5ee7968a  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/3da2a587-cb55-5532-8fe2-0efb5ee7968a  

## Ownership & control

### Owners / controllers

- **Mrs Gillian Martin** (beneficial owner) — https://whiteintel.dev/entity/bb2eaad4-fe46-4a9c-91b7-363a35570863
- **CLOWNTECH LIMITED** (beneficial owner) — 50% — https://whiteintel.dev/entity/7c18df93-fad4-51d3-a6b2-016206e004cd
- **Mr Alexander Beare** (beneficial owner) — https://whiteintel.dev/entity/c7e95ed4-e86e-58ca-b85c-12d7d50215f5
- **Mrs Adrianne Beare** (beneficial owner) — https://whiteintel.dev/entity/29e614fd-b511-50fa-ad77-1bb0839a69b5
- **Mr Steven Martin** (beneficial owner) — https://whiteintel.dev/entity/bd81248e-1990-5620-ad62-b40da5e707ec
- **Mrs Gillian Martin** (beneficial owner) — https://whiteintel.dev/entity/cf189783-2145-5d46-8fd0-50280ab602cd
- **DDM MANAGEMENT LIMITED** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/779a088a-1072-4cfe-ad41-69ac161e8c65
- **CLOWNTECH LIMITED** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/7c18df93-fad4-51d3-a6b2-016206e004cd
- **NORLAND LIMITED** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/084be2ae-a7d0-522c-b066-99a4d96097a5
- **Mr Alexander Beare** (beneficial owner) — https://whiteintel.dev/entity/e8ae55cc-cd8e-43ea-a8fc-07e9bdd96083
- **Mrs Adrianne Beare** (beneficial owner) — https://whiteintel.dev/entity/18758438-d3c0-48b3-a82e-abc514f852d5
- **Mr Steven Martin** (beneficial owner) — https://whiteintel.dev/entity/383ee3a4-7619-437e-88ce-7c79f5e54a07

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

A **20-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:** `10110604`
- **Status:** active
- **Type:** ltd
- **Incorporated:** 2016-04-07
- **Registered office:** 12-16 Portsdown Mews, London, NW11 7HD, England
- **SIC:** 41100, 68100, 68209, 68320

### Officers

- MARTIN, Steven — secretary · appointed 2016-04-07
- MARTIN, Gillian — director · British · appointed 2024-10-28
- MARTIN, Steven — director · British · appointed 2016-04-07
- BEARE, Alexander — director · British · appointed 2016-04-07 · resigned 2024-10-28

### Beneficial owners (Persons with Significant Control)

- [Ddm Management Limited](https://whiteintel.dev/entity/779a088a-1072-4cfe-ad41-69ac161e8c65) — 25–50% shares · corporate PSC · England — since 2021-08-26
- [Norland Limited](https://whiteintel.dev/entity/084be2ae-a7d0-522c-b066-99a4d96097a5) — 25–50% shares · corporate PSC · England — since 2016-04-07
- [Clowntech Limited](https://whiteintel.dev/entity/7c18df93-fad4-51d3-a6b2-016206e004cd) — 25–50% shares · corporate PSC · England — ceased 2021-08-26
- Mrs Gillian Martin — significant influence or control · individual PSC · England — ceased 2016-04-07
- Mr Alexander Beare — significant influence or control · individual PSC · England — ceased 2016-04-07
- Mrs Adrianne Beare — significant influence or control · individual PSC · England — ceased 2016-04-07
- Mr Steven Martin — significant influence or control · individual PSC · England — ceased 2016-04-07

## Provenance

- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/10110604
- companies_house_bulk — https://find-and-update.company-information.service.gov.uk/company/10110604

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **PORTSDOWN MANAGEMENT LIMITED**. Human view: https://whiteintel.dev/entity/3da2a587-cb55-5532-8fe2-0efb5ee7968a · Structured JSON: https://whiteintel.dev/api/public/dossier/3da2a587-cb55-5532-8fe2-0efb5ee7968a._

_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"._