---
title: "DIPLOMA ONE LIMITED — Ownership Dossier"
canonical: https://whiteintel.dev/entity/92bbdec9-bdd5-54ca-96fd-048b185efdbb
json: https://whiteintel.dev/api/public/dossier/92bbdec9-bdd5-54ca-96fd-048b185efdbb
identifier: oo:GB-COH-06011905
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# DIPLOMA ONE LIMITED

**Type:** Company  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `oo:GB-COH-06011905`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/92bbdec9-bdd5-54ca-96fd-048b185efdbb  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/92bbdec9-bdd5-54ca-96fd-048b185efdbb  

## Cross-source identity

The same real-world entity, resolved across sources:

- **Diploma One Limited** — source · `gb-coh:6011905` — https://whiteintel.dev/entity/558da743-9c9c-4264-8885-057f93db0e4c

## Ownership & control

### Owners / controllers

- **DIPLOMA HOLDINGS PLC** (beneficial owner) — 100% — https://whiteintel.dev/entity/1c56a4a5-7bc4-578c-9bed-9b004e3627b6
- **Diploma Holdings Plc** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/96678a39-91e2-4bb1-9424-76f472bb64d5

### Holdings / subsidiaries

- **DIPLOMA TWO LIMITED** (beneficial owner) — 100% — https://whiteintel.dev/entity/1087c1d2-88e1-5dc6-9a36-98cb74e348ea

### 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:** `06011905`
- **Status:** active
- **Type:** ltd
- **Incorporated:** 2006-11-28
- **Registered office:** 10-11 Charterhouse Square, London, EC1M 6EE, England
- **SIC:** 99999

### Officers

- ORR, Lauren — director · British · appointed 2022-10-01
- DUGGAN, Stephen Paul — secretary · appointed 2013-04-19 · resigned 2016-03-31
- GALLAGHER, Anthony James — secretary · appointed 2016-03-31 · resigned 2020-05-05
- KULIN, Nichola Anne Karaszy — secretary · British · appointed 2006-11-28 · resigned 2008-02-05
- MEAD, Steven Paul — secretary · British · appointed 2008-07-29 · resigned 2013-04-19
- MORRISON, John — secretary · appointed 2020-05-05 · resigned 2025-05-30
- WEST, Stephen John — secretary · British · appointed 2008-02-05 · resigned 2008-07-31
- DUGGAN, Stephen Paul — director · British · appointed 2013-04-19 · resigned 2021-11-16
- GIBBES, Barbara — director · British · appointed 2020-06-22 · resigned 2022-09-30
- KULIN, Martin Karaszy — director · British · appointed 2006-11-28 · resigned 2008-02-05
- KULIN, Nichola Anne Karaszy — director · British · appointed 2006-11-28 · resigned 2008-02-05
- LINGWOOD, Nigel Peter — director · British · appointed 2013-06-25 · resigned 2020-06-22
- MEAD, Steven Paul — director · British · appointed 2008-07-29 · resigned 2013-04-19
- MORRISON, John — director · British · appointed 2022-10-01 · resigned 2025-05-30
- TAYLOR, Mark John — director · British · appointed 2016-03-31 · resigned 2020-02-03
- TUDOR, Peter Hugh — director · British · appointed 2008-02-05 · resigned 2008-07-29

### Beneficial owners (Persons with Significant Control)

- [Diploma Holdings Plc](https://whiteintel.dev/entity/96678a39-91e2-4bb1-9424-76f472bb64d5) — 75–100% shares · corporate PSC · England — since 2016-04-06

## Provenance

- companies_house_bulk — https://find-and-update.company-information.service.gov.uk/company/06011905
- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/06011905

## 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 **DIPLOMA ONE LIMITED** — https://whiteintel.dev/entity/92bbdec9-bdd5-54ca-96fd-048b185efdbb · pricing https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **DIPLOMA ONE LIMITED**. Human view: https://whiteintel.dev/entity/92bbdec9-bdd5-54ca-96fd-048b185efdbb · Structured JSON: https://whiteintel.dev/api/public/dossier/92bbdec9-bdd5-54ca-96fd-048b185efdbb._

_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"._