---
title: "THAMES UNDERWRITING LIMITED — Ownership Dossier"
canonical: https://whiteintel.dev/entity/87484d76-409a-5127-9758-9271e2f31fae
json: https://whiteintel.dev/api/public/dossier/87484d76-409a-5127-9758-9271e2f31fae
identifier: oo:GB-COH-07136128
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# THAMES UNDERWRITING LIMITED

**Type:** Company  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `oo:GB-COH-07136128`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/87484d76-409a-5127-9758-9271e2f31fae  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/87484d76-409a-5127-9758-9271e2f31fae  

## Ownership & control

### Owners / controllers

- **Mr Keith Derek Syrett** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/9506999e-d1ec-4dbf-a231-63adfdf0d988
- **Geo Specialty Group Holdings Limited** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/2f072962-e9bb-4bb7-ac37-c31fd64f0bc0
- **ARDONAGH ADVISORY MGA HOLDINGS LIMITED** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/19ba81af-56a1-5640-a426-3b19fbf72674

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

A **30-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:** `07136128`
- **Status:** active
- **Type:** ltd
- **Incorporated:** 2010-01-26
- **Registered office:** 2 Minster Court, Mincing Lane, London, EC3R 7PD, United Kingdom
- **SIC:** 65120

### Officers

- [ARDONAGH CORPORATE SECRETARY LIMITED](https://whiteintel.dev/entity/19880cb4-fe96-52d4-ac76-345a311c7a0f) — corporate secretary · appointed 2022-01-27
- FIRMIN, Katherine — director · British · appointed 2026-06-09
- LOWE, Scott — director · British · appointed 2026-06-09
- CLARKE, Dean — secretary · appointed 2020-11-17 · resigned 2022-01-27
- COLES, Derek John — director · British · appointed 2021-02-03 · resigned 2022-11-01
- HOUGH, Scott William — director · British · appointed 2021-01-22 · resigned 2022-01-27
- MINTERN, Andrew Haydn, Mr  — director · British · appointed 2022-11-01 · resigned 2026-06-09
- SUTTON, Jonathan Guy, Mr  — director · British · appointed 2022-01-27 · resigned 2022-11-01
- SWINDLE, Jaime — director · British · appointed 2022-11-01 · resigned 2026-06-09
- SYRETT, Keith Derek — director · British · appointed 2010-01-26 · resigned 2023-12-31
- THOMAS, Philip Donald — director · English · appointed 2010-01-26 · resigned 2020-08-12
- THOMAS, Phillip Donald — director · British · appointed 2010-01-26 · resigned 2010-01-26

### Beneficial owners (Persons with Significant Control)

- [Ardonagh Advisory Mga Holdings Limited](https://whiteintel.dev/entity/19ba81af-56a1-5640-a426-3b19fbf72674) — 75–100% shares · corporate PSC · United Kingdom — since 2022-11-01
- Geo Specialty Group Holdings Limited — 75–100% shares · corporate PSC · England — ceased 2022-11-01
- Mr Keith Derek Syrett — 25–50% shares · individual PSC — ceased 2020-08-12

## Exposure (derived from the ownership graph)

**1** owner upstream in this entity's ownership/control chain is flagged — a sanctions hit or a secrecy jurisdiction — an investigative lead by resolved identity, not a legal determination. The contributing parties and the hop-by-hop path unlock with a paid API key or a one-off dossier — https://whiteintel.dev/pricing.

## Provenance

- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/07136128
- companies_house_bulk — https://find-and-update.company-information.service.gov.uk/company/07136128

## 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 **THAMES UNDERWRITING LIMITED** — https://whiteintel.dev/entity/87484d76-409a-5127-9758-9271e2f31fae · pricing https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **THAMES UNDERWRITING LIMITED**. Human view: https://whiteintel.dev/entity/87484d76-409a-5127-9758-9271e2f31fae · Structured JSON: https://whiteintel.dev/api/public/dossier/87484d76-409a-5127-9758-9271e2f31fae._

_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"._