---
title: "Mr Marek Stefaniuk — Ownership Dossier"
canonical: https://whiteintel.dev/entity/2ef2d3ee-08ce-4288-b045-6a5248a543ea
json: https://whiteintel.dev/api/public/dossier/2ef2d3ee-08ce-4288-b045-6a5248a543ea
identifier: psc:quDNlu6yy7kuLdd6NBrQhI6_REQ
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# Mr Marek Stefaniuk

**Type:** Person  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `psc:quDNlu6yy7kuLdd6NBrQhI6_REQ`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/2ef2d3ee-08ce-4288-b045-6a5248a543ea  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/2ef2d3ee-08ce-4288-b045-6a5248a543ea  

## Ownership & control

### Holdings / subsidiaries

- **BUILDMECH LTD** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/e7f9e7bb-85d5-564e-90d3-8ea20a8f5dce

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Mr Marek Stefaniuk**. Human view: https://whiteintel.dev/entity/2ef2d3ee-08ce-4288-b045-6a5248a543ea · Structured JSON: https://whiteintel.dev/api/public/dossier/2ef2d3ee-08ce-4288-b045-6a5248a543ea._

_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"._