---
title: "QUANTUM-H LIMITED — Ownership Dossier"
canonical: https://whiteintel.dev/entity/4fc5e51f-48a4-5805-b635-6dfe68f9f8a8
json: https://whiteintel.dev/api/public/dossier/4fc5e51f-48a4-5805-b635-6dfe68f9f8a8
identifier: oo:GB-COH-11104424
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# QUANTUM-H LIMITED

**Type:** Company  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `oo:GB-COH-11104424`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/4fc5e51f-48a4-5805-b635-6dfe68f9f8a8  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/4fc5e51f-48a4-5805-b635-6dfe68f9f8a8  

## Ownership & control

### Owners / controllers

- **Mr Leon Samuel** (beneficial owner) — 75% — https://whiteintel.dev/entity/99702c63-2364-5963-84cd-d6afd4f462e5
- **SPEAFI LIMITED** (beneficial owner) — 100% — https://whiteintel.dev/entity/441944b1-5394-578f-ac53-3c5f8be1c743
- **Mr Leon Samuel** (beneficial owner) — 62.5% — https://whiteintel.dev/entity/9e10f555-3446-4cd6-b350-615ce70b60fa
- **SPEAFI LIMITED** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/441944b1-5394-578f-ac53-3c5f8be1c743

### Holdings / subsidiaries

- **REGEO LIMITED** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/a9d4a85a-e6fb-5992-ae07-cd8e71325cf3

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

A **16-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:** `11104424`
- **Status:** active
- **Type:** ltd
- **Incorporated:** 2017-12-08
- **Registered office:** 1 London Street, Reading, RG1 4PN, United Kingdom
- **SIC:** 62012

### Officers

- [SPEAFI SECRETARIAL LIMITED](https://whiteintel.dev/entity/e021e650-5b3f-5144-9961-8f058bb5a6f9) — corporate secretary · appointed 2019-02-12
- CUTLER, David Richard — director · British · appointed 2018-03-01
- HARLOW, Casimir Charles Samuel — director · British · appointed 2022-10-14
- RODRIGUEZ MUIÑO, Carlos — director · Spanish · appointed 2022-10-14
- SAMUEL, Amy Marie — director · British · appointed 2022-10-14
- SAMUEL, Leon — director · British,American · appointed 2018-01-09
- HANSON, Lara — director · American · appointed 2022-10-14 · resigned 2024-11-01
- PARKER, Gary — director · Australian · appointed 2018-03-01 · resigned 2019-11-28
- ROLES, Philippa, Dr — director · British · appointed 2017-12-08 · resigned 2018-03-01
- TAJ, Mohammad Nadeem — director · British · appointed 2018-03-01 · resigned 2026-01-28

### Beneficial owners (Persons with Significant Control)

- Mr Leon Samuel — 50–75% shares · individual PSC · United Kingdom — since 2018-01-30
- [Speafi Limited](https://whiteintel.dev/entity/441944b1-5394-578f-ac53-3c5f8be1c743) — 75–100% shares · corporate PSC · United Kingdom — ceased 2018-01-30

## Provenance

- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/11104424
- companies_house_bulk — https://find-and-update.company-information.service.gov.uk/company/11104424

## 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 **QUANTUM-H LIMITED** — https://whiteintel.dev/entity/4fc5e51f-48a4-5805-b635-6dfe68f9f8a8 · pricing https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **QUANTUM-H LIMITED**. Human view: https://whiteintel.dev/entity/4fc5e51f-48a4-5805-b635-6dfe68f9f8a8 · Structured JSON: https://whiteintel.dev/api/public/dossier/4fc5e51f-48a4-5805-b635-6dfe68f9f8a8._

_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"._