---
title: "Mr Leszek Sebastian Ostroznikow — Ownership Dossier"
canonical: https://whiteintel.dev/entity/db20c183-bc95-5ff1-a355-2db9cbf43901
json: https://whiteintel.dev/api/public/dossier/db20c183-bc95-5ff1-a355-2db9cbf43901
identifier: oo-person:GB-COH-PER-11667424-Qiycd_eovzwI1WrD7KeG_T1pob0
jurisdiction: PL
risk: Low
source: WhiteIntel corporate-ownership graph
---

# Mr Leszek Sebastian Ostroznikow

**Type:** Person  
**Jurisdiction:** PL  
**Identifier:** `oo-person:GB-COH-PER-11667424-Qiycd_eovzwI1WrD7KeG_T1pob0`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/db20c183-bc95-5ff1-a355-2db9cbf43901  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/db20c183-bc95-5ff1-a355-2db9cbf43901  

## Ownership & control

### Holdings / subsidiaries

- **MASTERGIPS LTD** (beneficial owner) — 100% — https://whiteintel.dev/entity/0614ada2-5cbb-5013-a49d-935a9773f036

## Provenance

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

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Mr Leszek Sebastian Ostroznikow**. Human view: https://whiteintel.dev/entity/db20c183-bc95-5ff1-a355-2db9cbf43901 · Structured JSON: https://whiteintel.dev/api/public/dossier/db20c183-bc95-5ff1-a355-2db9cbf43901._

_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"._