---
title: "Mr Mark Mason — Ownership Dossier"
canonical: https://whiteintel.dev/entity/1d340174-e229-4d82-9e8a-d8cdd5035b29
json: https://whiteintel.dev/api/public/dossier/1d340174-e229-4d82-9e8a-d8cdd5035b29
identifier: psc:9-HSXgSAzGOWxApNM6Zo1Mo_VXc
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# Mr Mark Mason

**Type:** Person  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `psc:9-HSXgSAzGOWxApNM6Zo1Mo_VXc`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/1d340174-e229-4d82-9e8a-d8cdd5035b29  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/1d340174-e229-4d82-9e8a-d8cdd5035b29  

## Ownership & control

### Holdings / subsidiaries

- **GLM CLEANING LTD** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/9d310f25-484e-502a-a69a-33ba9315d6bf

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Mr Mark Mason**. Human view: https://whiteintel.dev/entity/1d340174-e229-4d82-9e8a-d8cdd5035b29 · Structured JSON: https://whiteintel.dev/api/public/dossier/1d340174-e229-4d82-9e8a-d8cdd5035b29._

_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"._