---
title: "NXSTAGE MEDICAL, INC. — Ownership Dossier"
canonical: https://whiteintel.dev/entity/6af4045d-235f-51fe-ab3b-8f44dd71f57c
json: https://whiteintel.dev/api/public/dossier/6af4045d-235f-51fe-ab3b-8f44dd71f57c
identifier: sec:0001333170
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# NXSTAGE MEDICAL, INC.

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001333170`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/6af4045d-235f-51fe-ab3b-8f44dd71f57c  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/6af4045d-235f-51fe-ab3b-8f44dd71f57c  

## Ownership & control

### Owners / controllers

- **UTTERBERG DAVID S** (tenpercentowner) — https://whiteintel.dev/entity/d86a61da-d7dc-51f6-9974-125ab33d5e76
- **DEERFIELD INTERNATIONAL MASTER FUND, L.P.** (tenpercentownerother) — https://whiteintel.dev/entity/7c900670-9f79-5080-b7a8-e287d8ed6b94
- **DEERFIELD CAPITAL LP** (tenpercentownerother) — https://whiteintel.dev/entity/5f3c11a7-c53a-58c1-ba4f-1ad86e04c791
- **DEERFIELD PARTNERS, L.P.** (tenpercentownerother) — https://whiteintel.dev/entity/65f05e41-ef95-517f-9b59-b6fc681aa121
- **DEERFIELD SPECIAL SITUATIONS INTERNATIONAL MASTER FUND, L.P.** (tenpercentownerother) — https://whiteintel.dev/entity/3c331f86-b5b2-56dc-bfaa-e22c9ccfb64a
- **DEERFIELD SPECIAL SITUATIONS FUND, L.P.** (tenpercentownerother) — https://whiteintel.dev/entity/0cd0b0a2-5e73-54c5-be78-49a74fbed3f4
- **DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C)** (tenpercentownerother) — https://whiteintel.dev/entity/31a5caa4-05d6-5739-b04b-16a6222da289
- **Flynn James E** (tenpercentownerother) — https://whiteintel.dev/entity/e41579a6-248b-5454-a089-66f9a7c69ae7
- **CREDIT SUISSE AG/** (tenpercentowner) — https://whiteintel.dev/entity/e6b56755-829f-5ca3-a526-d88b502d2985
- **ORBIMED ADVISORS LLC** (tenpercentowner) — https://whiteintel.dev/entity/4fe8d3ec-3487-5b04-877d-c8ddaf0718be
- **ISALY SAMUEL D** (tenpercentowner) — https://whiteintel.dev/entity/6eb4d15a-ef6c-5a2e-bed4-48871342f0c0
- **SILVERSTEIN JONATHAN** (tenpercentowner) — https://whiteintel.dev/entity/5972b7ed-b4fa-5a87-b8f8-18d2eae6c7eb
- **DEERFIELD SPECIAL SITUATIONS FUND, L.P.** (tenpercentowner) — https://whiteintel.dev/entity/0cd0b0a2-5e73-54c5-be78-49a74fbed3f4
- **DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C)** (tenpercentowner) — https://whiteintel.dev/entity/31a5caa4-05d6-5739-b04b-16a6222da289
- **DEERFIELD PRIVATE DESIGN INTERNATIONAL, L.P.** (tenpercentowner) — https://whiteintel.dev/entity/7338e97d-a3af-58ee-87a1-e9a35d1d5ad1
- **DEERFIELD SPECIAL SITUATIONS FUND INTERNATIONAL LTD** (tenpercentowner) — https://whiteintel.dev/entity/ed426a3e-eb53-56c4-9d9c-d9d1287c8871
- **DEERFIELD PRIVATE DESIGAN FUND L P** (tenpercentowner) — https://whiteintel.dev/entity/f62a0611-b32e-5710-b42e-497026f7c4a5
- **Flynn James E** (tenpercentowner) — https://whiteintel.dev/entity/e41579a6-248b-5454-a089-66f9a7c69ae7
- **DEERFIELD PARTNERS, L.P.** (tenpercentowner) — https://whiteintel.dev/entity/65f05e41-ef95-517f-9b59-b6fc681aa121
- **DEERFIELD INTERNATIONAL LTD** (tenpercentowner) — https://whiteintel.dev/entity/1ca1b752-35fb-56fa-a782-c75b428a7870
- **DEERFIELD CAPITAL LP** (tenpercentowner) — https://whiteintel.dev/entity/5f3c11a7-c53a-58c1-ba4f-1ad86e04c791
- **DEERFIELD PRIVATE DESIGAN FUND L P** (tenpercentownerother) — https://whiteintel.dev/entity/f62a0611-b32e-5710-b42e-497026f7c4a5
- **DEERFIELD PRIVATE DESIGN INTERNATIONAL, L.P.** (tenpercentownerother) — https://whiteintel.dev/entity/7338e97d-a3af-58ee-87a1-e9a35d1d5ad1
- **DEERFIELD INTERNATIONAL LTD** (tenpercentownerother) — https://whiteintel.dev/entity/1ca1b752-35fb-56fa-a782-c75b428a7870
- **DEERFIELD SPECIAL SITUATIONS FUND INTERNATIONAL LTD** (tenpercentownerother) — https://whiteintel.dev/entity/ed426a3e-eb53-56c4-9d9c-d9d1287c8871
- **CHAMBON PHILIPPE** (tenpercentowner) — https://whiteintel.dev/entity/862fbe22-4dc3-5061-95b6-c775817b15b1
- **ATLAS VENTURE FUND III L P** (tenpercentowner) — https://whiteintel.dev/entity/88f5a936-31eb-5869-afac-09313e3199a8
- **FORMELA JEAN FRANCOIS** (tenpercentowner) — https://whiteintel.dev/entity/3f3ba91c-b70b-5f4b-af1a-08d97e551998
- **ATLAS VENTURE ENTREPRENEURS FUND III L P** (tenpercentowner) — https://whiteintel.dev/entity/b64cd9de-758b-5e20-bd6a-8c449e392e69
- **ATLAS VENTURE ASSOCIATES III L P** (tenpercentowner) — https://whiteintel.dev/entity/eb59b2c5-fea0-5767-8ada-926da1a79476

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

A **62-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.

## Get the full, resolved dossier (agent-callable)

The above is the free teaser. The resolved **multi-hop UBO chain**, ownership **%**, full **financial history**, itemised **assets** and the hop-by-hop **exposure path** are the paid depth — callable as tools from your agent:

```bash
npx -y @whiteintel/mcp-server   # then: get_dossier · trace_ownership_path · check_offshore_exposure
```

Or unlock a one-off cited dossier for **NXSTAGE MEDICAL, INC.** — https://whiteintel.dev/entity/6af4045d-235f-51fe-ab3b-8f44dd71f57c · pricing https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **NXSTAGE MEDICAL, INC.**. Human view: https://whiteintel.dev/entity/6af4045d-235f-51fe-ab3b-8f44dd71f57c · Structured JSON: https://whiteintel.dev/api/public/dossier/6af4045d-235f-51fe-ab3b-8f44dd71f57c._

_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"._