---
title: "Mr Mark Simon Katz — Ownership Dossier"
canonical: https://whiteintel.dev/entity/3286fbbc-3e25-4ce7-a074-97a8d58ecd3c
json: https://whiteintel.dev/api/public/dossier/3286fbbc-3e25-4ce7-a074-97a8d58ecd3c
identifier: psc:2f1tEIgi5_akwNg-Jz4Q_APpOi8
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# Mr Mark Simon Katz

**Type:** Person  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `psc:2f1tEIgi5_akwNg-Jz4Q_APpOi8`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/3286fbbc-3e25-4ce7-a074-97a8d58ecd3c  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/3286fbbc-3e25-4ce7-a074-97a8d58ecd3c  

## Ownership & control

### Holdings / subsidiaries

- **BIG RED FISH LIMITED** (beneficial owner) — https://whiteintel.dev/entity/0673fb19-2657-5755-a682-2a70957cdc1c

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Mr Mark Simon Katz**. Human view: https://whiteintel.dev/entity/3286fbbc-3e25-4ce7-a074-97a8d58ecd3c · Structured JSON: https://whiteintel.dev/api/public/dossier/3286fbbc-3e25-4ce7-a074-97a8d58ecd3c._

_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"._