---
title: "Mr Geoffrey John Siden — Ownership Dossier"
canonical: https://whiteintel.dev/entity/b3e36ebb-33bb-40b7-8314-9808c45e22ab
json: https://whiteintel.dev/api/public/dossier/b3e36ebb-33bb-40b7-8314-9808c45e22ab
identifier: psc:S1PWWvszL_luPPS_D_n-koFTB60
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# Mr Geoffrey John Siden

**Type:** Person  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `psc:S1PWWvszL_luPPS_D_n-koFTB60`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/b3e36ebb-33bb-40b7-8314-9808c45e22ab  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/b3e36ebb-33bb-40b7-8314-9808c45e22ab  

## Ownership & control

### Holdings / subsidiaries

- **FORTITUDO (DOLPHIN) LIMITED** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/477d848e-5dc6-5f21-b4f3-74961411b667

## Get the full, resolved dossier (agent-callable)

The above is the free teaser. The resolved **multi-hop UBO chain**, ownership **%**, full **financial history**, itemised **assets** and the hop-by-hop **exposure path** are the paid depth — callable as tools from your agent:

```bash
npx -y @whiteintel/mcp-server   # then: get_dossier · trace_ownership_path · check_offshore_exposure
```

Or unlock a one-off cited dossier for **Mr Geoffrey John Siden** — https://whiteintel.dev/entity/b3e36ebb-33bb-40b7-8314-9808c45e22ab · pricing https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Mr Geoffrey John Siden**. Human view: https://whiteintel.dev/entity/b3e36ebb-33bb-40b7-8314-9808c45e22ab · Structured JSON: https://whiteintel.dev/api/public/dossier/b3e36ebb-33bb-40b7-8314-9808c45e22ab._

_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"._