---
title: "MERRIMACK PHARMACEUTICALS INC — Ownership Dossier"
canonical: https://whiteintel.dev/entity/4d45c6ce-b63c-5b85-b216-6bbbb5f8a83b
json: https://whiteintel.dev/api/public/dossier/4d45c6ce-b63c-5b85-b216-6bbbb5f8a83b
identifier: sec:0001274792
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# MERRIMACK PHARMACEUTICALS INC

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001274792`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/4d45c6ce-b63c-5b85-b216-6bbbb5f8a83b  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/4d45c6ce-b63c-5b85-b216-6bbbb5f8a83b  

## Ownership & control

### Owners / controllers

- **JFL CAPITAL HOLDINGS LLC** (tenpercentownerother) — https://whiteintel.dev/entity/31181d76-f61c-5354-98e3-f9910eccc033
- **JFL CAPITAL MANAGEMENT, LLC** (tenpercentownerother) — https://whiteintel.dev/entity/1809b49a-701b-5c6f-9c64-c454338ece72
- **22NW GP, Inc.** (tenpercentownerother) — https://whiteintel.dev/entity/a1c918b1-92c2-57d1-8e3a-74465de53142
- **JFL PARTNERS FUND LP** (tenpercentownerother) — https://whiteintel.dev/entity/126cb2ea-ea66-5cf6-b136-46f041c2ab23
- **ARYEH JASON** (tenpercentownerother) — https://whiteintel.dev/entity/98e86212-9be1-5a3c-9f1d-3a9efe79e905
- **LAWLER JOSEPH F.** (tenpercentownerother) — https://whiteintel.dev/entity/b67763b6-439b-596d-a945-d3d31e4a2e9b
- **JFL CAPITAL MANAGEMENT LP** (tenpercentownerother) — https://whiteintel.dev/entity/4c3dc68f-c3bf-5f63-9439-88af7d9e7543
- **22NW Fund, LP** (tenpercentownerother) — https://whiteintel.dev/entity/49aec788-3911-5496-8c5c-1dd1c8e61b94
- **22NW, LP** (tenpercentownerother) — https://whiteintel.dev/entity/46408a4a-d0b6-59ec-a316-14ccc4e09198
- **English Aron R.** (tenpercentownerother) — https://whiteintel.dev/entity/abe3b81d-a37f-5821-a042-da35789edfd4
- **22NW Fund GP, LLC** (tenpercentownerother) — https://whiteintel.dev/entity/87cb6e00-9dc2-5729-aed2-938168e7656f
- **LIN KENNETH** (tenpercentownerother) — https://whiteintel.dev/entity/37dcc7bf-63f9-561b-8a8c-a1e29e39f855

### 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 **MERRIMACK PHARMACEUTICALS INC** — https://whiteintel.dev/entity/4d45c6ce-b63c-5b85-b216-6bbbb5f8a83b · pricing https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **MERRIMACK PHARMACEUTICALS INC**. Human view: https://whiteintel.dev/entity/4d45c6ce-b63c-5b85-b216-6bbbb5f8a83b · Structured JSON: https://whiteintel.dev/api/public/dossier/4d45c6ce-b63c-5b85-b216-6bbbb5f8a83b._

_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"._