---
title: "MPLX LP — Ownership Dossier"
canonical: https://whiteintel.dev/entity/6ff8df4a-00c2-5d6a-9a8e-d66008f8a21a
json: https://whiteintel.dev/api/public/dossier/6ff8df4a-00c2-5d6a-9a8e-d66008f8a21a
identifier: sec:0001552000
jurisdiction: US
risk: High
source: WhiteIntel corporate-ownership graph
---

# MPLX LP

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001552000`  
**Risk level:** High  
**Canonical dossier:** https://whiteintel.dev/entity/6ff8df4a-00c2-5d6a-9a8e-d66008f8a21a  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/6ff8df4a-00c2-5d6a-9a8e-d66008f8a21a  

## Ownership & control

### Owners / controllers

- **GIANT INDUSTRIES INC** (tenpercentowner) — https://whiteintel.dev/entity/7222b738-2761-578a-8b13-56c602598e69
- **Marathon Petroleum Corp** (tenpercentowner) — https://whiteintel.dev/entity/71da930a-91cb-5844-9d8a-a3e9a911be8b
- **WESTERN REFINING, INC.** (tenpercentowner) — https://whiteintel.dev/entity/c5a09bee-ae74-5d72-ad4e-e4f081ffc6ad
- **MPLX GP LLC** (tenpercentowner) — https://whiteintel.dev/entity/661263fb-6954-5cbd-9ddd-20e58a10d25a
- **TTC HOLDINGS LLC** (tenpercentowner) — https://whiteintel.dev/entity/a78ee384-1aae-5bfb-8553-a8551935d0ee
- **MPC INVESTMENT LLC** (tenpercentowner) — https://whiteintel.dev/entity/6fb0e365-7a41-510b-b7a3-b9fc0009c243
- **ANDEAVOR** (tenpercentowner) — https://whiteintel.dev/entity/9057f3cb-b34c-5df0-9830-3aa54b496acb
- **WESTERN REFINING SOUTHWEST, INC.** (tenpercentowner) — https://whiteintel.dev/entity/9346bcbd-7061-58a4-98bb-e6047ab037c0
- **MPLX LOGISTICS HOLDINGS LLC** (tenpercentowner) — https://whiteintel.dev/entity/136c865d-53dc-5852-9787-4ae63ef2d8ef
- **MARKWEST HYDROCARBON INC** (tenpercentowner) — https://whiteintel.dev/entity/5eb6e16d-e294-5ca9-ab66-a1b7d95b7de6
- **MPLX HOLDINGS INC.** (tenpercentowner) — https://whiteintel.dev/entity/c8637de3-9d86-53c6-824a-f7588c4c25e6

### Holdings / subsidiaries

- **ANDEAVOR LOGISTICS LP** (tenpercentowner) — https://whiteintel.dev/entity/5dccc146-c5ca-5612-a817-7de9e92cf7c0
- **ANDEAVOR LOGISTICS LP** (director) — https://whiteintel.dev/entity/5dccc146-c5ca-5612-a817-7de9e92cf7c0

### UBO chain (walk to the ultimate owner)

A **390-step** ownership/control chain to the ultimate beneficial owner is resolved for this entity. The full cited chain unlocks with a paid API key or a one-off dossier — https://whiteintel.dev/pricing.

## 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 **MPLX LP** — https://whiteintel.dev/entity/6ff8df4a-00c2-5d6a-9a8e-d66008f8a21a · pricing https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **MPLX LP**. Human view: https://whiteintel.dev/entity/6ff8df4a-00c2-5d6a-9a8e-d66008f8a21a · Structured JSON: https://whiteintel.dev/api/public/dossier/6ff8df4a-00c2-5d6a-9a8e-d66008f8a21a._

_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"._