---
title: "Mr Sebastian Jacek Duma — Ownership Dossier"
canonical: https://whiteintel.dev/entity/c7de8ffa-e0f1-42ce-b959-fa285b02c5d2
json: https://whiteintel.dev/api/public/dossier/c7de8ffa-e0f1-42ce-b959-fa285b02c5d2
identifier: psc:_OS6XUWYfcxI7HiLqpTr1Rfn6_w
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# Mr Sebastian Jacek Duma

**Type:** Person  
**Jurisdiction:** GB  
**Identifier:** `psc:_OS6XUWYfcxI7HiLqpTr1Rfn6_w`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/c7de8ffa-e0f1-42ce-b959-fa285b02c5d2  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/c7de8ffa-e0f1-42ce-b959-fa285b02c5d2  

## Ownership & control

### Holdings / subsidiaries

- **MAKAS LONDON LTD** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/9fc8e3f5-190e-47e9-9fa3-69c31f25c639

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Mr Sebastian Jacek Duma**. Human view: https://whiteintel.dev/entity/c7de8ffa-e0f1-42ce-b959-fa285b02c5d2 · Structured JSON: https://whiteintel.dev/api/public/dossier/c7de8ffa-e0f1-42ce-b959-fa285b02c5d2._

_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"._