---
title: "SOUTHWELL DAVID P — Ownership Dossier"
canonical: https://whiteintel.dev/entity/97fa4715-2b39-5b8d-bb29-d042c0cc1389
json: https://whiteintel.dev/api/public/dossier/97fa4715-2b39-5b8d-bb29-d042c0cc1389
identifier: sec:0001251553
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# SOUTHWELL DAVID P

**Type:** Person  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001251553`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/97fa4715-2b39-5b8d-bb29-d042c0cc1389  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/97fa4715-2b39-5b8d-bb29-d042c0cc1389  

## Ownership & control

### Holdings / subsidiaries

- **PTC THERAPEUTICS, INC.** (director) — https://whiteintel.dev/entity/bff295b0-99a5-5461-a4c1-3869041697ff
- **SEPRACOR INC /DE/** (officer) — https://whiteintel.dev/entity/ee1fe6d9-5ffb-590e-b7e7-4e4a162edbf9
- **PTC THERAPEUTICS, INC.** (director) — https://whiteintel.dev/entity/bff295b0-99a5-5461-a4c1-3869041697ff
- **ROCKET PHARMACEUTICALS, INC.** (director) — https://whiteintel.dev/entity/261f5aba-a43c-5248-bcb7-40f220e2dadd
- **TScan Therapeutics, Inc.** (director) — https://whiteintel.dev/entity/ed49fe48-9dbc-5f78-bb8a-f8df134624bb
- **TScan Therapeutics, Inc.** (officer) — https://whiteintel.dev/entity/ed49fe48-9dbc-5f78-bb8a-f8df134624bb
- **Spero Therapeutics, Inc.** (director) — https://whiteintel.dev/entity/3e182f58-b9a6-5ea2-96df-347de93659e3
- **ROCKET PHARMACEUTICALS, INC.** (officer) — https://whiteintel.dev/entity/261f5aba-a43c-5248-bcb7-40f220e2dadd
- **HUMAN GENOME SCIENCES INC** (officer) — https://whiteintel.dev/entity/0792ad78-c154-5241-9223-54aebab51335
- **FIRST EAGLE ALTERNATIVE CAPITAL BDC, INC.** (director) — https://whiteintel.dev/entity/2b5ab6c1-ddb1-5428-981e-7ef793e10c03
- **BIOSEPRA INC** (director) — https://whiteintel.dev/entity/ed79bb55-f213-52f7-994a-fbc0958ac0d0
- **HUMAN GENOME SCIENCES INC** (director) — https://whiteintel.dev/entity/0792ad78-c154-5241-9223-54aebab51335

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **SOUTHWELL DAVID P**. Human view: https://whiteintel.dev/entity/97fa4715-2b39-5b8d-bb29-d042c0cc1389 · Structured JSON: https://whiteintel.dev/api/public/dossier/97fa4715-2b39-5b8d-bb29-d042c0cc1389._

_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"._