---
title: "Mr Sylwester Alojzy Gruszka — Ownership Dossier"
canonical: https://whiteintel.dev/entity/e3cb42b6-e561-4ef8-9728-1daced67ff3d
json: https://whiteintel.dev/api/public/dossier/e3cb42b6-e561-4ef8-9728-1daced67ff3d
identifier: psc:UPT3JeMnp4K8BjnbfAPGVeH4Y1w
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# Mr Sylwester Alojzy Gruszka

**Type:** Person  
**Jurisdiction:** GB  
**Identifier:** `psc:UPT3JeMnp4K8BjnbfAPGVeH4Y1w`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/e3cb42b6-e561-4ef8-9728-1daced67ff3d  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/e3cb42b6-e561-4ef8-9728-1daced67ff3d  

## Ownership & control

### Holdings / subsidiaries

- **GMK INSTALLERS LTD** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/6dcb893c-5776-5e92-bb00-e02bd6b033c9

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Mr Sylwester Alojzy Gruszka**. Human view: https://whiteintel.dev/entity/e3cb42b6-e561-4ef8-9728-1daced67ff3d · Structured JSON: https://whiteintel.dev/api/public/dossier/e3cb42b6-e561-4ef8-9728-1daced67ff3d._

_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"._