---
title: "THIRTY KING STREET LIMITED — Ownership Dossier"
canonical: https://whiteintel.dev/entity/ccf09d9a-558d-5bda-bed2-2776efa9f082
json: https://whiteintel.dev/api/public/dossier/ccf09d9a-558d-5bda-bed2-2776efa9f082
identifier: oo:GB-COH-00858309
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# THIRTY KING STREET LIMITED

**Type:** Company  
**Jurisdiction:** GB  
**Identifier:** `oo:GB-COH-00858309`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/ccf09d9a-558d-5bda-bed2-2776efa9f082  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/ccf09d9a-558d-5bda-bed2-2776efa9f082  

## Ownership & control

### Owners / controllers

- **Mr Martin John Costello** (beneficial owner) — 50% — https://whiteintel.dev/entity/83ba5aab-4925-5024-a36c-b0126ac5701c
- **Mrs Joanne Lynn Costello** (beneficial owner) — 50% — https://whiteintel.dev/entity/06a6c20a-e7a5-544f-ae85-81f7fd5c2652
- **Mr Martin John Costello** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/fb1dc10d-7850-4654-931f-7a3e0ecf8328
- **Mrs Joanne Lynn Costello** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/ef026295-1835-4790-879e-d0ce2fe93e3a

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

1. **Mr Martin John Costello** — beneficial owner 50% → *THIRTY KING STREET LIMITED*
1. **Mrs Joanne Lynn Costello** — beneficial owner 50% → *THIRTY KING STREET LIMITED*
1. **Mr Martin John Costello** — beneficial owner 37.5% → *THIRTY KING STREET LIMITED*
1. **Mrs Joanne Lynn Costello** — beneficial owner 37.5% → *THIRTY KING STREET LIMITED*

## Company profile (live · UK Companies House)

- **Company number:** `00858309`
- **Status:** Active
- **Type:** Private Limited Company
- **Incorporated:** 1965-09-06
- **Registered office:** HAMILTON HOUSE, 30 KING STREET, SALFORD, MANCHESTER, M6 7GY
- **SIC:** 68209 - Other letting and operating of own or leased real estate

## Provenance

- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/00858309
- companies_house_bulk — https://find-and-update.company-information.service.gov.uk/company/00858309

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **THIRTY KING STREET LIMITED**. Human view: https://whiteintel.dev/entity/ccf09d9a-558d-5bda-bed2-2776efa9f082 · Structured JSON: https://whiteintel.dev/api/public/dossier/ccf09d9a-558d-5bda-bed2-2776efa9f082._

_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"._