---
title: "Mr William Porter — Ownership Dossier"
canonical: https://whiteintel.dev/entity/446deef8-9a61-446c-a67b-73781955f3a4
json: https://whiteintel.dev/api/public/dossier/446deef8-9a61-446c-a67b-73781955f3a4
identifier: psc:KIz6rQkUo9lR1Fxzw9KKG85dSuQ
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# Mr William Porter

**Type:** Person  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `psc:KIz6rQkUo9lR1Fxzw9KKG85dSuQ`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/446deef8-9a61-446c-a67b-73781955f3a4  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/446deef8-9a61-446c-a67b-73781955f3a4  

## Ownership & control

### Holdings / subsidiaries

- **SUPREMO MEDIA LTD** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/75b60456-d6b0-5f04-aff3-e57fb80ed7f3

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Mr William Porter**. Human view: https://whiteintel.dev/entity/446deef8-9a61-446c-a67b-73781955f3a4 · Structured JSON: https://whiteintel.dev/api/public/dossier/446deef8-9a61-446c-a67b-73781955f3a4._

_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"._