---
title: "PLESSEY SEMICONDUCTORS LIMITED — Ownership Dossier"
canonical: https://whiteintel.dev/entity/250a655b-0f4a-5322-ba3c-5e670c4c8eb2
json: https://whiteintel.dev/api/public/dossier/250a655b-0f4a-5322-ba3c-5e670c4c8eb2
identifier: oo:GB-COH-04129612
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# PLESSEY SEMICONDUCTORS LIMITED

**Type:** Company  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `oo:GB-COH-04129612`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/250a655b-0f4a-5322-ba3c-5e670c4c8eb2  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/250a655b-0f4a-5322-ba3c-5e670c4c8eb2  

## Ownership & control

### Owners / controllers

- **HAYLO LABS LIMITED** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/77e44010-32f9-4ed3-bb09-7eac86ae2e7f
- **SDTIP LIMITED** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/90ecaac1-b8ea-5e0e-a440-17c50028ed5a

### Holdings / subsidiaries

- **PLESSEY LIGHTING LIMITED** (beneficial owner) — 100% — https://whiteintel.dev/entity/61c1ebcd-ff60-50fe-9991-a3b9171abb78
- **PLESSEY LIGHTING LIMITED** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/61c1ebcd-ff60-50fe-9991-a3b9171abb78
- **JSFM TAMERTON LIMITED** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/68f2240a-c40c-58e1-9b09-dfffeb67abb7

### 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:** `04129612`
- **Status:** active
- **Type:** ltd
- **Incorporated:** 2000-12-18
- **Registered office:** Tamerton Road, Roborough, Plymouth, Devon, PL6 7BQ
- **SIC:** 26110

### Officers

- LUDKIN, Maria — secretary · appointed 2025-08-15
- HAYES, David — director · British · appointed 2025-08-15
- SMITH, Richard Alexander Buchan — director · British · appointed 2025-08-15
- STANTON, Hilary Lesley — secretary · British · appointed 2002-03-13 · resigned 2009-12-31
- STANTON, Hilary Lesley — secretary · British · appointed 2001-02-08 · resigned 2001-03-23
- ABOGADO NOMINEES LIMITED — corporate nominee secretary · appointed 2000-12-18 · resigned 2001-02-08
- CHALFEN SECRETARIES LIMITED — corporate secretary · appointed 2001-03-23 · resigned 2002-02-27
- ALLCHURCH, Andrew Robert — director · British · appointed 2002-03-13 · resigned 2005-11-02
- BAILEY, Christopher Simon — director · British · appointed 2002-03-13 · resigned 2024-06-26
- BAILEY, Christopher Simon — director · British · appointed 2001-02-08 · resigned 2001-03-23
- BOLD, Brenda Shaun — director · British · appointed 2005-11-02 · resigned 2007-04-20
- CAWSE, David Alan — director · British · appointed 2007-04-20 · resigned 2008-07-09
- LE GOFF, Michael — director · British · appointed 2009-12-31 · resigned 2018-07-05
- MEYOHAS, Marc Joseph — director · French · appointed 2011-04-20 · resigned 2011-10-17
- MROS, Harald — director · German · appointed 2001-08-01 · resigned 2002-12-03
- RIEMER, Manfred, Dr — director · German · appointed 2005-11-02 · resigned 2007-04-20
- SAND, Falk — director · German · appointed 2001-03-23 · resigned 2001-08-01
- SILVESTER, Iain Charles — director · British · appointed 2018-07-05 · resigned 2025-08-15
- STRICKLAND, Keith, Dr — director · British · appointed 2022-04-06 · resigned 2025-08-15
- WINKLER, Volker — director · German · appointed 2002-12-03 · resigned 2004-08-16

### Beneficial owners (Persons with Significant Control)

- [Haylo Labs Limited](https://whiteintel.dev/entity/77e44010-32f9-4ed3-bb09-7eac86ae2e7f) — 75–100% shares · corporate PSC · England — since 2025-08-15
- [Plessey Group Holdings Limited](https://whiteintel.dev/entity/90ecaac1-b8ea-5e0e-a440-17c50028ed5a) — 75–100% shares · corporate PSC · United Kingdom — ceased 2025-08-15

## Provenance

- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/04129612
- companies_house_bulk — https://find-and-update.company-information.service.gov.uk/company/04129612

## Get the full, resolved dossier (agent-callable)

The above is the free teaser. The resolved **multi-hop UBO chain**, ownership **%**, full **financial history**, itemised **assets** and the hop-by-hop **exposure path** are the paid depth — callable as tools from your agent:

```bash
npx -y @whiteintel/mcp-server   # then: get_dossier · trace_ownership_path · check_offshore_exposure
```

Or unlock a one-off cited dossier for **PLESSEY SEMICONDUCTORS LIMITED** — https://whiteintel.dev/entity/250a655b-0f4a-5322-ba3c-5e670c4c8eb2 · pricing https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **PLESSEY SEMICONDUCTORS LIMITED**. Human view: https://whiteintel.dev/entity/250a655b-0f4a-5322-ba3c-5e670c4c8eb2 · Structured JSON: https://whiteintel.dev/api/public/dossier/250a655b-0f4a-5322-ba3c-5e670c4c8eb2._

_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"._