---
title: "Sian Marie Colborn — Ownership Dossier"
canonical: https://whiteintel.dev/entity/8d511db1-13dd-4c84-9d47-54243b65814a
json: https://whiteintel.dev/api/public/dossier/8d511db1-13dd-4c84-9d47-54243b65814a
identifier: psc:aR4p6kCwl993ZmXzlojeaEDcEwk
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# Sian Marie Colborn

**Type:** Person  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `psc:aR4p6kCwl993ZmXzlojeaEDcEwk`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/8d511db1-13dd-4c84-9d47-54243b65814a  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/8d511db1-13dd-4c84-9d47-54243b65814a  

## Ownership & control

### Holdings / subsidiaries

- **GRANDFLOTILLA LTD** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/b206c592-9040-5f1c-acaf-ebcdddb80f77

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Sian Marie Colborn**. Human view: https://whiteintel.dev/entity/8d511db1-13dd-4c84-9d47-54243b65814a · Structured JSON: https://whiteintel.dev/api/public/dossier/8d511db1-13dd-4c84-9d47-54243b65814a._

_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"._