---
title: "THE AON MASTERTRUSTEE LIMITED — Ownership Dossier"
canonical: https://whiteintel.dev/entity/fb13657b-0868-54b7-bc31-998877394bae
json: https://whiteintel.dev/api/public/dossier/fb13657b-0868-54b7-bc31-998877394bae
identifier: oo:GB-COH-09871789
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# THE AON MASTERTRUSTEE LIMITED

**Type:** Company  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `oo:GB-COH-09871789`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/fb13657b-0868-54b7-bc31-998877394bae  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/fb13657b-0868-54b7-bc31-998877394bae  

## Ownership & control

### Owners / controllers

- **AON SOLUTIONS UK LIMITED** (beneficial owner) — 100% — https://whiteintel.dev/entity/47bab57f-f773-5439-9b31-346949e9ce90
- **Aon Solutions Uk Limited** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/4454ebc3-3d61-4390-8cb7-8fd20beda198

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

A **24-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:** `09871789`
- **Status:** active
- **Type:** ltd
- **Incorporated:** 2015-11-13
- **Registered office:** The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom
- **SIC:** 66290

### Officers

- COSEC 2000 LIMITED — corporate secretary · appointed 2015-11-13
- HAWKINS, Jonathan Charles — director · British · appointed 2025-07-01
- MACRO, Paul — director · British · appointed 2025-04-01
- NASH, Kimberley Anne — director · British · appointed 2022-09-30
- [BESTRUSTEES LIMITED](https://whiteintel.dev/entity/8509d351-d1cb-5ec2-aa9c-1dbbcdc8d665) — corporate director · appointed 2021-11-18
- [LAW DEBENTURE PENSION TRUST CORPORATION PLC](https://whiteintel.dev/entity/587b44a2-db74-5328-9d1c-de747754705a) — corporate director · appointed 2022-09-15
- HANSON, Philip Leighton — director · British · appointed 2015-11-13 · resigned 2016-04-15
- HOGWOOD, Paul Arthur — director · British · appointed 2015-11-13 · resigned 2016-09-30
- MATTINGLY, Roger Alan Richard — director · British · appointed 2016-09-30 · resigned 2022-09-30
- WILLIAMS, Christine Marie — director · American · appointed 2015-11-13 · resigned 2016-09-30
- [CAPITAL CRANFIELD PENSION TRUSTEES LIMITED](https://whiteintel.dev/entity/8db28803-a525-54fa-825e-907b8633a272) — corporate director · appointed 2016-09-30 · resigned 2024-12-01
- [ZEDRA GOVERNANCE LIMITED](https://whiteintel.dev/entity/c360cec9-1832-56cf-b1ef-9be4070c8273) — corporate director · appointed 2016-09-30 · resigned 2022-09-30

### Beneficial owners (Persons with Significant Control)

- [Aon Solutions Uk Limited](https://whiteintel.dev/entity/4454ebc3-3d61-4390-8cb7-8fd20beda198) — 75–100% shares · corporate PSC · United Kingdom — since 2016-04-06

## Provenance

- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/09871789
- companies_house_bulk — https://find-and-update.company-information.service.gov.uk/company/09871789

## 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 **THE AON MASTERTRUSTEE LIMITED** — https://whiteintel.dev/entity/fb13657b-0868-54b7-bc31-998877394bae · pricing https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **THE AON MASTERTRUSTEE LIMITED**. Human view: https://whiteintel.dev/entity/fb13657b-0868-54b7-bc31-998877394bae · Structured JSON: https://whiteintel.dev/api/public/dossier/fb13657b-0868-54b7-bc31-998877394bae._

_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"._