---
title: "INSULET CORP — Ownership Dossier"
canonical: https://whiteintel.dev/entity/3d1f71c0-5f31-5390-8a99-e7760bfd5e96
json: https://whiteintel.dev/api/public/dossier/3d1f71c0-5f31-5390-8a99-e7760bfd5e96
identifier: sec:0001145197
jurisdiction: US
risk: High
source: WhiteIntel corporate-ownership graph
---

# INSULET CORP

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001145197`  
**Risk level:** High  
**Canonical dossier:** https://whiteintel.dev/entity/3d1f71c0-5f31-5390-8a99-e7760bfd5e96  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/3d1f71c0-5f31-5390-8a99-e7760bfd5e96  

## Ownership & control

### Owners / controllers

- **SEIFERT WILLIAM M** (tenpercentowner) — https://whiteintel.dev/entity/b318f3f2-9fd5-588e-a8fd-fe95b747c8d6
- **BROOKS JOHN L** (tenpercentowner) — https://whiteintel.dev/entity/842757f4-bb0e-529b-8643-3b517766c0c2
- **PRISM VENTURE PARTNERS III A LP** (tenpercentowner) — https://whiteintel.dev/entity/5ccde3df-e725-5ce4-8f29-d9af8909331f
- **PRISM VENTURE PARTNERS III LP** (tenpercentowner) — https://whiteintel.dev/entity/4da1a8c2-4aed-5012-a4ee-e7dbd7d19189
- **PRISM INVESTMENT PARTNERS III LP** (tenpercentowner) — https://whiteintel.dev/entity/f90e9bdd-2557-5100-a143-ba1c558285e6
- **PRISM VENTURE PARTNERS III LLC** (tenpercentowner) — https://whiteintel.dev/entity/5c999d24-443d-5118-932f-86aa38c8c1a4
- **MILDER DONALD B** (tenpercentowner) — https://whiteintel.dev/entity/4e65f14f-f33c-545f-86be-918d68ae9a54
- **ATWOOD BRIAN G** (tenpercentowner) — https://whiteintel.dev/entity/0e37ddca-e87b-5eaf-b87a-aa4dc0a376eb
- **ROBERTSON REBECCA B** (tenpercentowner) — https://whiteintel.dev/entity/8088429f-de1b-5d69-b2ee-38b450283e34
- **VERSANT SIDE FUND I LP** (tenpercentowner) — https://whiteintel.dev/entity/f259bbff-b959-5b5c-b705-0c3ba6f497c6
- **VERSANT AFFILIATES FUND I-B LP** (tenpercentowner) — https://whiteintel.dev/entity/c1b91649-274c-5f3c-bbb4-ce87faa6d655
- **COLELLA SAMUEL D** (tenpercentowner) — https://whiteintel.dev/entity/3e3474ae-acca-51dd-b63e-c976e4d42ad0
- **JAFFE ROSS A MD** (tenpercentowner) — https://whiteintel.dev/entity/b41f2749-88f4-55a9-934a-1ef278dc91ee
- **LUBASH BARBARA N** (tenpercentowner) — https://whiteintel.dev/entity/97531285-56ae-594a-b2d5-45085ffee2dd
- **VERSANT VENTURES I LLC** (tenpercentowner) — https://whiteintel.dev/entity/37469629-9d05-552f-ac8a-bfe432afc590
- **LINK WILLIAM J PHD** (tenpercentowner) — https://whiteintel.dev/entity/040f1154-ad41-56a2-82b6-eb0af47f0715
- **VERSANT AFFILIATES FUND I-A LP** (tenpercentowner) — https://whiteintel.dev/entity/19967f3f-5d95-563b-be32-3cddb45380fd
- **VERSANT VENTURE CAPITAL I LP** (tenpercentowner) — https://whiteintel.dev/entity/98dc679e-3cef-5ce5-9e4b-a13467b295e4
- **NYE GORDON E** (tenpercentowner) — https://whiteintel.dev/entity/73a39d70-7d65-5441-8e6c-35b01faee0d8

### UBO chain (walk to the ultimate owner)

A **147-step** ownership/control chain to the ultimate beneficial owner is resolved for this entity. The full cited chain unlocks with a paid API key or a one-off dossier — https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **INSULET CORP**. Human view: https://whiteintel.dev/entity/3d1f71c0-5f31-5390-8a99-e7760bfd5e96 · Structured JSON: https://whiteintel.dev/api/public/dossier/3d1f71c0-5f31-5390-8a99-e7760bfd5e96._

_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"._