---
title: "Mr John Colm Costello — Ownership Dossier"
canonical: https://whiteintel.dev/entity/d6e59c19-ce70-5b81-8b49-375981278df7
json: https://whiteintel.dev/api/public/dossier/d6e59c19-ce70-5b81-8b49-375981278df7
identifier: oo-person:GB-COH-PER-NI717277-1PR7QIUrJWmRAfD4tQ3cTF2uUvg
jurisdiction: IE
risk: Low
source: WhiteIntel corporate-ownership graph
---

# Mr John Colm Costello

**Type:** Person  
**Jurisdiction:** IE  
**Identifier:** `oo-person:GB-COH-PER-NI717277-1PR7QIUrJWmRAfD4tQ3cTF2uUvg`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/d6e59c19-ce70-5b81-8b49-375981278df7  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/d6e59c19-ce70-5b81-8b49-375981278df7  

## Ownership & control

### Holdings / subsidiaries

- **ENGINEERING MAINTENANCE AND FITTING LTD** (beneficial owner) — 100% — https://whiteintel.dev/entity/d09aa7b2-0729-5aa8-8c4b-c0e0f8e95f8e

## Provenance

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

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Mr John Colm Costello**. Human view: https://whiteintel.dev/entity/d6e59c19-ce70-5b81-8b49-375981278df7 · Structured JSON: https://whiteintel.dev/api/public/dossier/d6e59c19-ce70-5b81-8b49-375981278df7._

_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"._