---
title: "Mr John James Byrne — Ownership Dossier"
canonical: https://whiteintel.dev/entity/3ce87e27-44f3-4e21-afe6-e8965ea5c8c9
json: https://whiteintel.dev/api/public/dossier/3ce87e27-44f3-4e21-afe6-e8965ea5c8c9
identifier: psc:sbcUWemgHfu-WJAYwUFzcqBWipc
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# Mr John James Byrne

**Type:** Person  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `psc:sbcUWemgHfu-WJAYwUFzcqBWipc`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/3ce87e27-44f3-4e21-afe6-e8965ea5c8c9  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/3ce87e27-44f3-4e21-afe6-e8965ea5c8c9  

## Ownership & control

### Holdings / subsidiaries

- **MAPAIL LIMITED** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/c25fb2bd-6341-524f-84cf-d9f3cdeb2d64

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Mr John James Byrne**. Human view: https://whiteintel.dev/entity/3ce87e27-44f3-4e21-afe6-e8965ea5c8c9 · Structured JSON: https://whiteintel.dev/api/public/dossier/3ce87e27-44f3-4e21-afe6-e8965ea5c8c9._

_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"._