---
title: "Mr Mark William Bielby — Ownership Dossier"
canonical: https://whiteintel.dev/entity/781d398f-d361-4fd5-b82f-ffb87ef2784a
json: https://whiteintel.dev/api/public/dossier/781d398f-d361-4fd5-b82f-ffb87ef2784a
identifier: psc:oclaf3yz3laskiJx9dxIPP1p0oY
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# Mr Mark William Bielby

**Type:** Person  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `psc:oclaf3yz3laskiJx9dxIPP1p0oY`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/781d398f-d361-4fd5-b82f-ffb87ef2784a  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/781d398f-d361-4fd5-b82f-ffb87ef2784a  

## Ownership & control

### Holdings / subsidiaries

- **MARCH GROUP HOLDINGS LTD** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/e4abe3a4-872b-56d8-ac84-650e52e9997a

## 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 Mark William Bielby** — https://whiteintel.dev/entity/781d398f-d361-4fd5-b82f-ffb87ef2784a · pricing https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Mr Mark William Bielby**. Human view: https://whiteintel.dev/entity/781d398f-d361-4fd5-b82f-ffb87ef2784a · Structured JSON: https://whiteintel.dev/api/public/dossier/781d398f-d361-4fd5-b82f-ffb87ef2784a._

_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"._