---
title: "SEIFERT WILLIAM M — Ownership Dossier"
canonical: https://whiteintel.dev/entity/b318f3f2-9fd5-588e-a8fd-fe95b747c8d6
json: https://whiteintel.dev/api/public/dossier/b318f3f2-9fd5-588e-a8fd-fe95b747c8d6
identifier: sec:0001343931
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# SEIFERT WILLIAM M

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001343931`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/b318f3f2-9fd5-588e-a8fd-fe95b747c8d6  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/b318f3f2-9fd5-588e-a8fd-fe95b747c8d6  

## Ownership & control

### Holdings / subsidiaries

- **INSULET CORP** (tenpercentowner) — https://whiteintel.dev/entity/3d1f71c0-5f31-5390-8a99-e7760bfd5e96

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **SEIFERT WILLIAM M**. Human view: https://whiteintel.dev/entity/b318f3f2-9fd5-588e-a8fd-fe95b747c8d6 · Structured JSON: https://whiteintel.dev/api/public/dossier/b318f3f2-9fd5-588e-a8fd-fe95b747c8d6._

_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"._