---
title: "WILLIAM BLAIR MEZZANINE CAPITAL PARTNERS III LLC — Ownership Dossier"
canonical: https://whiteintel.dev/entity/b7ea0bb2-9ecd-5812-9b43-bccd5eeb8fe0
json: https://whiteintel.dev/api/public/dossier/b7ea0bb2-9ecd-5812-9b43-bccd5eeb8fe0
identifier: sec:0001261404
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# WILLIAM BLAIR MEZZANINE CAPITAL PARTNERS III LLC

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001261404`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/b7ea0bb2-9ecd-5812-9b43-bccd5eeb8fe0  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/b7ea0bb2-9ecd-5812-9b43-bccd5eeb8fe0  

## Ownership & control

### Holdings / subsidiaries

- **CLARION HOUSE INC** (tenpercentowner) — https://whiteintel.dev/entity/f917555e-74a7-5b03-b204-ce2da589baeb

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **WILLIAM BLAIR MEZZANINE CAPITAL PARTNERS III LLC**. Human view: https://whiteintel.dev/entity/b7ea0bb2-9ecd-5812-9b43-bccd5eeb8fe0 · Structured JSON: https://whiteintel.dev/api/public/dossier/b7ea0bb2-9ecd-5812-9b43-bccd5eeb8fe0._

_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"._