---
title: "Mr Denis Stephen Costello — Ownership Dossier"
canonical: https://whiteintel.dev/entity/35ed33ce-2f16-50fb-9554-ce4045ea470b
json: https://whiteintel.dev/api/public/dossier/35ed33ce-2f16-50fb-9554-ce4045ea470b
identifier: oo-person:GB-COH-PER-SC303855-moEB7zCyLIZc1MTaV-YtY8CBwpo
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# Mr Denis Stephen Costello

**Type:** Person  
**Jurisdiction:** GB  
**Identifier:** `oo-person:GB-COH-PER-SC303855-moEB7zCyLIZc1MTaV-YtY8CBwpo`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/35ed33ce-2f16-50fb-9554-ce4045ea470b  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/35ed33ce-2f16-50fb-9554-ce4045ea470b  

## Ownership & control

### Holdings / subsidiaries

- **D S C DRILLING CONSULTANTS LTD.** (beneficial owner) — 50% — https://whiteintel.dev/entity/5f30a128-3bf4-5b18-8243-73017751c48d

## Provenance

- OpenOwnership — https://www.openownership.org

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Mr Denis Stephen Costello**. Human view: https://whiteintel.dev/entity/35ed33ce-2f16-50fb-9554-ce4045ea470b · Structured JSON: https://whiteintel.dev/api/public/dossier/35ed33ce-2f16-50fb-9554-ce4045ea470b._

_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"._