---
title: "ALEXANDER MARK A — Ownership Dossier"
canonical: https://whiteintel.dev/entity/3bbd7f7a-65e6-548f-b2ae-456bd03481f4
json: https://whiteintel.dev/api/public/dossier/3bbd7f7a-65e6-548f-b2ae-456bd03481f4
identifier: sec:0001212607
jurisdiction: US
risk: Medium
source: WhiteIntel corporate-ownership graph
---

# ALEXANDER MARK A

**Type:** Person  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001212607`  
**Risk level:** Medium  
**Canonical dossier:** https://whiteintel.dev/entity/3bbd7f7a-65e6-548f-b2ae-456bd03481f4  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/3bbd7f7a-65e6-548f-b2ae-456bd03481f4  

## Ownership & control

### Holdings / subsidiaries

- **Builders FirstSource, Inc.** (director) — https://whiteintel.dev/entity/ecea27ac-3de6-5d01-b9c4-776098290c39
- **Builders FirstSource, Inc.** (director) — https://whiteintel.dev/entity/ecea27ac-3de6-5d01-b9c4-776098290c39
- **W. P. Carey Inc.** (director) — https://whiteintel.dev/entity/497034a7-1ab4-55c7-95ec-bea13e220b0e
- **Builders FirstSource, Inc.** (director) — https://whiteintel.dev/entity/ecea27ac-3de6-5d01-b9c4-776098290c39
- **W. P. Carey Inc.** (director) — https://whiteintel.dev/entity/497034a7-1ab4-55c7-95ec-bea13e220b0e
- **BMC STOCK HOLDINGS, INC.** (director) — https://whiteintel.dev/entity/3e1b679a-7cf1-5cde-a2af-a513010214fb
- **KAYDON CORP** (director) — https://whiteintel.dev/entity/87d3cfed-855c-5a82-a7b4-ed625508a21e
- **SUBURBAN PROPANE PARTNERS LP** (director) — https://whiteintel.dev/entity/fa3f9431-8baa-53c3-8192-7dbceb1ef4b3
- **SUBURBAN PROPANE PARTNERS LP** (officer) — https://whiteintel.dev/entity/fa3f9431-8baa-53c3-8192-7dbceb1ef4b3

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **ALEXANDER MARK A**. Human view: https://whiteintel.dev/entity/3bbd7f7a-65e6-548f-b2ae-456bd03481f4 · Structured JSON: https://whiteintel.dev/api/public/dossier/3bbd7f7a-65e6-548f-b2ae-456bd03481f4._

_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"._