---
title: "J3 ADVISORY LIMITED — Ownership Dossier"
canonical: https://whiteintel.dev/entity/fbdb2d43-4948-559e-bed7-fd9cb40dac1d
json: https://whiteintel.dev/api/public/dossier/fbdb2d43-4948-559e-bed7-fd9cb40dac1d
identifier: oo:GB-COH-13578715
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# J3 ADVISORY LIMITED

**Type:** Company  
**Jurisdiction:** GB  
**Identifier:** `oo:GB-COH-13578715`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/fbdb2d43-4948-559e-bed7-fd9cb40dac1d  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/fbdb2d43-4948-559e-bed7-fd9cb40dac1d  

## Ownership & control

### Owners / controllers

- **Mr Jack Michael Bristow** (beneficial owner) — 50% — https://whiteintel.dev/entity/b54d97e2-d2f5-56dc-9c1c-0e33f4a741db
- **Mr John Joseph Leadsom** (beneficial owner) — https://whiteintel.dev/entity/decee37e-4360-5f2d-b267-b244c896508c
- **Mr James Mole** (beneficial owner) — https://whiteintel.dev/entity/c2193944-45d0-5a45-89a1-a77324e90046
- **Mr Jack Michael Bristow** (beneficial owner) — 62.5% — https://whiteintel.dev/entity/2f14dda6-3e99-47f6-b509-6c59ade81427
- **Mr James Mole** (beneficial owner) — https://whiteintel.dev/entity/aed5b272-1ed2-4459-a5ea-eb2efb6210d3
- **Mr John Joseph Leadsom** (beneficial owner) — https://whiteintel.dev/entity/f6604907-acd7-4c83-9010-bb0c10706409
- **Rosita Mendonca** (beneficial owner) — https://whiteintel.dev/entity/7b898b52-03be-4e1d-93e6-2c58bb2d1a3a

### Holdings / subsidiaries

- **J3 CONSULTANCY LTD** (beneficial owner) — 100% — https://whiteintel.dev/entity/d20e5fc6-4ee3-557e-9b7d-af993d82d615
- **J3 FINANCE LIMITED** (beneficial owner) — 100% — https://whiteintel.dev/entity/c0722237-7c2a-55f7-a33f-4a37d99ab692
- **J3 INS LIMITED** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/952e72b1-0216-5151-af72-d577818056f0
- **J3 FINANCE LIMITED** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/c0722237-7c2a-55f7-a33f-4a37d99ab692
- **J3 CONSULTANCY LTD** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/d20e5fc6-4ee3-557e-9b7d-af993d82d615

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

1. **Mr Jack Michael Bristow** — beneficial owner 50% → *J3 ADVISORY LIMITED*
1. **Mr John Joseph Leadsom** — beneficial owner → *J3 ADVISORY LIMITED*
1. **Mr James Mole** — beneficial owner → *J3 ADVISORY LIMITED*
1. **Mr Jack Michael Bristow** — beneficial owner 62.5% → *J3 ADVISORY LIMITED*
1. **Mr James Mole** — beneficial owner → *J3 ADVISORY LIMITED*
1. **Mr John Joseph Leadsom** — beneficial owner → *J3 ADVISORY LIMITED*
1. **Rosita Mendonca** — beneficial owner → *J3 ADVISORY LIMITED*

## Company profile (live · UK Companies House)

- **Company number:** `13578715`
- **Status:** active
- **Type:** ltd
- **Incorporated:** 2021-08-23
- **Registered office:** 38 South Molton Street, London, W1K 5RL, United Kingdom
- **SIC:** 64209

### Officers

- BRISTOW, Jack Michael — director · British · appointed 2021-08-23
- LEADSOM, John Joseph — director · British · appointed 2021-08-23
- MENDONCA, Rosita — director · Portuguese · appointed 2026-06-03
- MOLE, James — director · British · appointed 2021-08-23 · resigned 2026-04-02

### Beneficial owners (Persons with Significant Control)

- Rosita Mendonca — significant influence or control · individual PSC · United Kingdom — since 2026-06-03
- Mr Jack Michael Bristow — 50–75% shares · individual PSC · United Kingdom — since 2021-08-23
- Mr John Joseph Leadsom — significant influence or control · individual PSC · United Kingdom — since 2021-08-23
- Mr James Mole — significant influence or control · individual PSC · United Kingdom — ceased 2026-04-02

## Provenance

- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/13578715
- companies_house_bulk — https://find-and-update.company-information.service.gov.uk/company/13578715

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **J3 ADVISORY LIMITED**. Human view: https://whiteintel.dev/entity/fbdb2d43-4948-559e-bed7-fd9cb40dac1d · Structured JSON: https://whiteintel.dev/api/public/dossier/fbdb2d43-4948-559e-bed7-fd9cb40dac1d._

_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"._