---
title: "FOX JOHN M — Ownership Dossier"
canonical: https://whiteintel.dev/entity/0874e1db-9593-57ca-a209-e6de46756d9c
json: https://whiteintel.dev/api/public/dossier/0874e1db-9593-57ca-a209-e6de46756d9c
identifier: sec:0001167209
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# FOX JOHN M

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001167209`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/0874e1db-9593-57ca-a209-e6de46756d9c  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/0874e1db-9593-57ca-a209-e6de46756d9c  

## Ownership & control

### Holdings / subsidiaries

- **MARKWEST HYDROCARBON INC** (director) — https://whiteintel.dev/entity/5eb6e16d-e294-5ca9-ab66-a1b7d95b7de6
- **MARKWEST HYDROCARBON INC** (tenpercentowner) — https://whiteintel.dev/entity/5eb6e16d-e294-5ca9-ab66-a1b7d95b7de6
- **MARKWEST ENERGY PARTNERS L P** (director) — https://whiteintel.dev/entity/f328b9af-54e6-50ba-ab36-44b00f6a94f2
- **MARKWEST ENERGY PARTNERS L P** (tenpercentowner) — https://whiteintel.dev/entity/f328b9af-54e6-50ba-ab36-44b00f6a94f2

## 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 **FOX JOHN M** — https://whiteintel.dev/entity/0874e1db-9593-57ca-a209-e6de46756d9c · pricing https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **FOX JOHN M**. Human view: https://whiteintel.dev/entity/0874e1db-9593-57ca-a209-e6de46756d9c · Structured JSON: https://whiteintel.dev/api/public/dossier/0874e1db-9593-57ca-a209-e6de46756d9c._

_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"._