---
title: "Mr Jonathan Elfan Rees — Ownership Dossier"
canonical: https://whiteintel.dev/entity/33c373bd-e61a-48fc-99c1-dc210805ccc5
json: https://whiteintel.dev/api/public/dossier/33c373bd-e61a-48fc-99c1-dc210805ccc5
identifier: psc:TMOEE9na-njXGkCp9D71wnEmPlU
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# Mr Jonathan Elfan Rees

**Type:** Person  
**Jurisdiction:** GB  
**Identifier:** `psc:TMOEE9na-njXGkCp9D71wnEmPlU`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/33c373bd-e61a-48fc-99c1-dc210805ccc5  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/33c373bd-e61a-48fc-99c1-dc210805ccc5  

## Ownership & control

### Holdings / subsidiaries

- **PROFICIENT SYSTEMS LTD** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/d2ebcf4e-77fc-5257-9c16-097b342b014b

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Mr Jonathan Elfan Rees**. Human view: https://whiteintel.dev/entity/33c373bd-e61a-48fc-99c1-dc210805ccc5 · Structured JSON: https://whiteintel.dev/api/public/dossier/33c373bd-e61a-48fc-99c1-dc210805ccc5._

_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"._