---
title: "Mr William Sydney Thomas — Ownership Dossier"
canonical: https://whiteintel.dev/entity/f5a8dc2a-5ba3-58d0-8d82-5de993a879cb
json: https://whiteintel.dev/api/public/dossier/f5a8dc2a-5ba3-58d0-8d82-5de993a879cb
identifier: oo-person:GB-COH-PER-11124406-a7rFmtyzmX1p32Wc_mSjftt4T2Q
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# Mr William Sydney Thomas

**Type:** Person  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `oo-person:GB-COH-PER-11124406-a7rFmtyzmX1p32Wc_mSjftt4T2Q`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/f5a8dc2a-5ba3-58d0-8d82-5de993a879cb  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/f5a8dc2a-5ba3-58d0-8d82-5de993a879cb  

## Ownership & control

### Holdings / subsidiaries

- **CASTLEWAY CORPORATION LIMITED** (beneficial owner) — 100% — https://whiteintel.dev/entity/f5259de0-b80d-5376-a8e9-c05e4d548d78

## Provenance

- OpenOwnership — https://www.openownership.org

## 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 William Sydney Thomas** — https://whiteintel.dev/entity/f5a8dc2a-5ba3-58d0-8d82-5de993a879cb · pricing https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Mr William Sydney Thomas**. Human view: https://whiteintel.dev/entity/f5a8dc2a-5ba3-58d0-8d82-5de993a879cb · Structured JSON: https://whiteintel.dev/api/public/dossier/f5a8dc2a-5ba3-58d0-8d82-5de993a879cb._

_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"._