---
title: "GREEN JOHN B — Ownership Dossier"
canonical: https://whiteintel.dev/entity/28bf331d-8e15-58b5-983d-c2cf159fbc06
json: https://whiteintel.dev/api/public/dossier/28bf331d-8e15-58b5-983d-c2cf159fbc06
identifier: sec:0001243847
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# GREEN JOHN B

**Type:** Company  
**Jurisdiction:** US  
**Identifier:** `sec:0001243847`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/28bf331d-8e15-58b5-983d-c2cf159fbc06  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/28bf331d-8e15-58b5-983d-c2cf159fbc06  

## Ownership & control

### Holdings / subsidiaries

- **GENZYME TRANSGENICS CORP** (officer) — https://whiteintel.dev/entity/e78a1b1b-e889-56b8-ac66-649dfa64098d
- **DICERNA PHARMACEUTICALS INC** (officer) — https://whiteintel.dev/entity/e266421a-23a3-55f8-9ed4-831e91084e35
- **Verastem, Inc.** (officer) — https://whiteintel.dev/entity/48e38b21-bb92-51a5-bacf-892c060d8dd6

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **GREEN JOHN B**. Human view: https://whiteintel.dev/entity/28bf331d-8e15-58b5-983d-c2cf159fbc06 · Structured JSON: https://whiteintel.dev/api/public/dossier/28bf331d-8e15-58b5-983d-c2cf159fbc06._

_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"._