---
title: "SUPERIOR SDI LIMITED — Ownership Dossier"
canonical: https://whiteintel.dev/entity/6a4e4b52-ade0-55be-af06-640fdd4d7d25
json: https://whiteintel.dev/api/public/dossier/6a4e4b52-ade0-55be-af06-640fdd4d7d25
identifier: oo:GB-COH-04287955
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# SUPERIOR SDI LIMITED

**Type:** Company  
**Jurisdiction:** GB  
**Identifier:** `oo:GB-COH-04287955`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/6a4e4b52-ade0-55be-af06-640fdd4d7d25  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/6a4e4b52-ade0-55be-af06-640fdd4d7d25  

## Ownership & control

### Owners / controllers

- **Carmen Castillo** (beneficial owner) — 75% — https://whiteintel.dev/entity/757fffc1-3e8c-5764-b32a-25b4b83ab33d
- **Carmen Castillo** (beneficial owner) — 62.5% — https://whiteintel.dev/entity/9ca58df4-12e7-4ead-a3c8-ba6254cb81dc

### 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:** `04287955`
- **Status:** active
- **Type:** ltd
- **Incorporated:** 2001-09-14
- **Registered office:** Suite 1, 7th Floor 50 Broadway, London, SW1H 0BL, United Kingdom
- **SIC:** 70229, 82110

### Officers

- VISTRA COSEC LIMITED — corporate secretary · appointed 2008-08-04
- CASTILLO, Carmen — director · Spanish · appointed 2001-09-14
- COLLINS, Linda Elizabeth — secretary · British · appointed 2006-01-31 · resigned 2008-08-04
- KNOWLES, Colleen — secretary · British · appointed 2001-09-14 · resigned 2006-01-31
- SWIFT INCORPORATIONS LIMITED — corporate nominee secretary · appointed 2001-09-14 · resigned 2001-09-14
- INSTANT COMPANIES LIMITED — corporate nominee director · appointed 2001-09-14 · resigned 2001-09-14

### Beneficial owners (Persons with Significant Control)

- Carmen Castillo — 50–75% shares · individual PSC · United States — since 2016-04-06

## Provenance

- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/04287955
- companies_house_bulk — https://find-and-update.company-information.service.gov.uk/company/04287955

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **SUPERIOR SDI LIMITED**. Human view: https://whiteintel.dev/entity/6a4e4b52-ade0-55be-af06-640fdd4d7d25 · Structured JSON: https://whiteintel.dev/api/public/dossier/6a4e4b52-ade0-55be-af06-640fdd4d7d25._

_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"._