---
title: "MASON ADVISORY GROUP HOLDINGS LIMITED — Ownership Dossier"
canonical: https://whiteintel.dev/entity/2ab01b7d-7984-5f06-a3d9-b5f54257d34d
json: https://whiteintel.dev/api/public/dossier/2ab01b7d-7984-5f06-a3d9-b5f54257d34d
identifier: oo:GB-COH-15221387
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# MASON ADVISORY GROUP HOLDINGS LIMITED

**Type:** Company  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `oo:GB-COH-15221387`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/2ab01b7d-7984-5f06-a3d9-b5f54257d34d  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/2ab01b7d-7984-5f06-a3d9-b5f54257d34d  

## Cross-source identity

The same real-world entity, resolved across sources:

- **Mason Advisory Group Holdings Limited** — source · `psc:0_dCAOnR9sZmOCWGzWvpaodtjcw` — https://whiteintel.dev/entity/433b5fc7-50d5-42d3-b47b-9b385ed41330

## Ownership & control

### Owners / controllers

- **SQUIRE PATTON BOGGS DIRECTORS LIMITED** (beneficial owner) — 100% — https://whiteintel.dev/entity/021d5b0d-e5e6-598c-a599-56433753fe9b
- **MASON ADVISORY GROUP LTD** (beneficial owner) — 100% — https://whiteintel.dev/entity/9f6e57ac-b702-5588-8585-4b73b468e21d
- **MASON ADVISORY GROUP LTD** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/9f6e57ac-b702-5588-8585-4b73b468e21d
- **Squire Patton Boggs Directors Limited** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/79670d13-6366-4e8a-af23-fea928061409

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

A **11-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:** `15221387`
- **Status:** active
- **Type:** ltd
- **Incorporated:** 2023-10-19
- **Registered office:** 1-3 Pemberton Row 3rd Floor, London, EC4A 3BG, England
- **SIC:** 64209

### Officers

- DE LIMA, Marco — director · Portuguese · appointed 2024-04-09
- MONTANANA, Jens Peter — director · British · appointed 2024-04-09
- MORRIS, Simon Paul — director · British · appointed 2024-04-09
- PUGH, Paul John — director · British · appointed 2024-04-09
- WATMOUGH, Stephen John — director · British · appointed 2024-04-09
- JONES, Jonathan James — director · British · appointed 2023-10-19 · resigned 2024-04-09
- [SQUIRE PATTON BOGGS DIRECTORS LIMITED](https://whiteintel.dev/entity/79670d13-6366-4e8a-af23-fea928061409) — corporate director · appointed 2023-10-19 · resigned 2024-04-09

### Beneficial owners (Persons with Significant Control)

- [Mason Advisory Group Ltd](https://whiteintel.dev/entity/9f6e57ac-b702-5588-8585-4b73b468e21d) — 75–100% shares · corporate PSC · England — since 2024-04-09
- [Squire Patton Boggs Directors Limited](https://whiteintel.dev/entity/79670d13-6366-4e8a-af23-fea928061409) — 75–100% shares · corporate PSC · United Kingdom — ceased 2024-04-09

## Provenance

- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/15221387
- companies_house_bulk — https://find-and-update.company-information.service.gov.uk/company/15221387

## 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 **MASON ADVISORY GROUP HOLDINGS LIMITED** — https://whiteintel.dev/entity/2ab01b7d-7984-5f06-a3d9-b5f54257d34d · pricing https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **MASON ADVISORY GROUP HOLDINGS LIMITED**. Human view: https://whiteintel.dev/entity/2ab01b7d-7984-5f06-a3d9-b5f54257d34d · Structured JSON: https://whiteintel.dev/api/public/dossier/2ab01b7d-7984-5f06-a3d9-b5f54257d34d._

_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"._