---
title: "WELZENBACH MARK JOSEPH — Ownership Dossier"
canonical: https://whiteintel.dev/entity/d100f89f-588c-5d96-9420-ace1fd73fa80
json: https://whiteintel.dev/api/public/dossier/d100f89f-588c-5d96-9420-ace1fd73fa80
identifier: sec:0001576903
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# WELZENBACH MARK JOSEPH

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001576903`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/d100f89f-588c-5d96-9420-ace1fd73fa80  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/d100f89f-588c-5d96-9420-ace1fd73fa80  

## Ownership & control

### Holdings / subsidiaries

- **HANOVER INSURANCE GROUP, INC.** (officer) — https://whiteintel.dev/entity/56fa8a98-b998-5f6c-a757-025c8d1156bc

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **WELZENBACH MARK JOSEPH**. Human view: https://whiteintel.dev/entity/d100f89f-588c-5d96-9420-ace1fd73fa80 · Structured JSON: https://whiteintel.dev/api/public/dossier/d100f89f-588c-5d96-9420-ace1fd73fa80._

_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"._