---
title: "MARKWEST ENERGY GP, L.L.C. — Ownership Dossier"
canonical: https://whiteintel.dev/entity/b79a0cd3-2538-5292-bb65-e7dbb2c212fa
json: https://whiteintel.dev/api/public/dossier/b79a0cd3-2538-5292-bb65-e7dbb2c212fa
identifier: sec:0001412304
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# MARKWEST ENERGY GP, L.L.C.

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001412304`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/b79a0cd3-2538-5292-bb65-e7dbb2c212fa  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/b79a0cd3-2538-5292-bb65-e7dbb2c212fa  

## Ownership & control

### Holdings / subsidiaries

- **MARKWEST HYDROCARBON INC** (tenpercentowner) — https://whiteintel.dev/entity/5eb6e16d-e294-5ca9-ab66-a1b7d95b7de6

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **MARKWEST ENERGY GP, L.L.C.**. Human view: https://whiteintel.dev/entity/b79a0cd3-2538-5292-bb65-e7dbb2c212fa · Structured JSON: https://whiteintel.dev/api/public/dossier/b79a0cd3-2538-5292-bb65-e7dbb2c212fa._

_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"._