---
title: "CASSIOPEIA STAR HOLDINGS LIMITED — Ownership Dossier"
canonical: https://whiteintel.dev/entity/85843f97-6535-52b9-a92a-021c1230ccc0
json: https://whiteintel.dev/api/public/dossier/85843f97-6535-52b9-a92a-021c1230ccc0
identifier: oo:GB-COH-10599507
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# CASSIOPEIA STAR HOLDINGS LIMITED

**Type:** Company  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `oo:GB-COH-10599507`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/85843f97-6535-52b9-a92a-021c1230ccc0  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/85843f97-6535-52b9-a92a-021c1230ccc0  

## Ownership & control

### Owners / controllers

- **Mr Mark Ashley Thorpe Barnwell** (beneficial owner) — 100% — https://whiteintel.dev/entity/7057dbbc-e19c-5a37-94f9-fc534b573bdf
- **Mr Mark Ashley Thorpe Barnwell** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/5745c34d-74e7-43a6-b42b-5e3ccfc2dd60

### Holdings / subsidiaries

- **MISTLESTAR WINCHESTER LIMITED** (beneficial owner) — 50% — https://whiteintel.dev/entity/f14e5041-c7fd-5955-a9fd-8119e8cec5f5
- **CASSIOPEIA STAR INVESTMENTS LIMITED** (beneficial owner) — 100% — https://whiteintel.dev/entity/f069cc7b-385c-55a8-955f-c0dc55cec785
- **MISTLESTAR WINCHESTER LIMITED** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/f14e5041-c7fd-5955-a9fd-8119e8cec5f5
- **CASSIOPEIA STAR INVESTMENTS LIMITED** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/f069cc7b-385c-55a8-955f-c0dc55cec785

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

A **2-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:** `10599507`
- **Status:** active
- **Type:** ltd
- **Incorporated:** 2017-02-03
- **Registered office:** Oceana House, 39-49 Commercial Road, Southampton, Hampshire, SO15 1GA, England
- **SIC:** 64209

### Officers

- BARNWELL, Joseph David Thorpe — director · British · appointed 2018-04-30
- BARNWELL, Mark Ashley Thorpe — director · British · appointed 2017-02-03
- BARNWELL, Joseph David Thorpe — secretary · appointed 2017-11-09 · resigned 2018-04-30

### Beneficial owners (Persons with Significant Control)

- Mr Mark Ashley Thorpe Barnwell — 75–100% shares · individual PSC · United Kingdom — since 2017-02-03

## Provenance

- companies_house_bulk — https://find-and-update.company-information.service.gov.uk/company/10599507
- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/10599507

## 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 **CASSIOPEIA STAR HOLDINGS LIMITED** — https://whiteintel.dev/entity/85843f97-6535-52b9-a92a-021c1230ccc0 · pricing https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **CASSIOPEIA STAR HOLDINGS LIMITED**. Human view: https://whiteintel.dev/entity/85843f97-6535-52b9-a92a-021c1230ccc0 · Structured JSON: https://whiteintel.dev/api/public/dossier/85843f97-6535-52b9-a92a-021c1230ccc0._

_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"._