---
title: "SINCLAIR DONALD R. — Ownership Dossier"
canonical: https://whiteintel.dev/entity/7e1df764-08e2-593d-adc9-0da06cbb295f
json: https://whiteintel.dev/api/public/dossier/7e1df764-08e2-593d-adc9-0da06cbb295f
identifier: sec:0001473676
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# SINCLAIR DONALD R.

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001473676`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/7e1df764-08e2-593d-adc9-0da06cbb295f  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/7e1df764-08e2-593d-adc9-0da06cbb295f  

## Ownership & control

### Holdings / subsidiaries

- **ALTA MESA RESOURCES, INC. /DE** (director) — https://whiteintel.dev/entity/fe7a87ec-49cb-5ebe-a887-5008c6596cf6
- **Western Midstream Partners, LP** (director) — https://whiteintel.dev/entity/a69c60ef-9687-5219-853e-42de8e1e0854
- **Western Midstream Partners, LP** (officer) — https://whiteintel.dev/entity/a69c60ef-9687-5219-853e-42de8e1e0854
- **WESTERN GAS PARTNERS LP** (director) — https://whiteintel.dev/entity/0c3b1042-9794-50a3-9e7e-897b667a2f05
- **WESTERN GAS PARTNERS LP** (officer) — https://whiteintel.dev/entity/0c3b1042-9794-50a3-9e7e-897b667a2f05

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **SINCLAIR DONALD R.**. Human view: https://whiteintel.dev/entity/7e1df764-08e2-593d-adc9-0da06cbb295f · Structured JSON: https://whiteintel.dev/api/public/dossier/7e1df764-08e2-593d-adc9-0da06cbb295f._

_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"._