---
title: "Cox John — Ownership Dossier"
canonical: https://whiteintel.dev/entity/572c4c8c-70ca-5047-b9d3-bfb23e05e8d4
json: https://whiteintel.dev/api/public/dossier/572c4c8c-70ca-5047-b9d3-bfb23e05e8d4
identifier: sec:0001498428
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# Cox John

**Type:** Person  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001498428`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/572c4c8c-70ca-5047-b9d3-bfb23e05e8d4  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/572c4c8c-70ca-5047-b9d3-bfb23e05e8d4  

## Ownership & control

### Holdings / subsidiaries

- **Dyne Therapeutics, Inc.** (officer) — https://whiteintel.dev/entity/6f3d0b50-7aa7-52a8-a2f9-11ef56e96f8c
- **Dyne Therapeutics, Inc.** (director) — https://whiteintel.dev/entity/6f3d0b50-7aa7-52a8-a2f9-11ef56e96f8c
- **Dyne Therapeutics, Inc.** (officer) — https://whiteintel.dev/entity/6f3d0b50-7aa7-52a8-a2f9-11ef56e96f8c
- **SIGILON THERAPEUTICS, INC.** (director) — https://whiteintel.dev/entity/0ba33aec-611a-5ca7-9913-738f19326a00
- **REPLIGEN CORP** (director) — https://whiteintel.dev/entity/4ce5eb5b-578a-5c94-946c-97af4791a7cf
- **BIOVERATIV INC.** (director) — https://whiteintel.dev/entity/1b03e9ae-d0bd-5da8-8d74-fa9c1b3100e0
- **BIOVERATIV INC.** (officer) — https://whiteintel.dev/entity/1b03e9ae-d0bd-5da8-8d74-fa9c1b3100e0
- **BIOGEN INC.** (officer) — https://whiteintel.dev/entity/152d5198-a9ef-588d-b005-20e031a47893

## 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 **Cox John** — https://whiteintel.dev/entity/572c4c8c-70ca-5047-b9d3-bfb23e05e8d4 · pricing https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Cox John**. Human view: https://whiteintel.dev/entity/572c4c8c-70ca-5047-b9d3-bfb23e05e8d4 · Structured JSON: https://whiteintel.dev/api/public/dossier/572c4c8c-70ca-5047-b9d3-bfb23e05e8d4._

_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"._