---
title: "REGENERON PHARMACEUTICALS, INC. — Ownership Dossier"
canonical: https://whiteintel.dev/entity/4c94c46c-66cf-5651-b60a-46242ce9fe83
json: https://whiteintel.dev/api/public/dossier/4c94c46c-66cf-5651-b60a-46242ce9fe83
identifier: sec:0000872589
jurisdiction: US
risk: Medium
source: WhiteIntel corporate-ownership graph
---

# REGENERON PHARMACEUTICALS, INC.

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0000872589`  
**Risk level:** Medium  
**Canonical dossier:** https://whiteintel.dev/entity/4c94c46c-66cf-5651-b60a-46242ce9fe83  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/4c94c46c-66cf-5651-b60a-46242ce9fe83  

## Ownership & control

### Owners / controllers

- **SCHLEIFER LEONARD S** (tenpercentowner) — https://whiteintel.dev/entity/37f74614-0a1c-5631-97c7-5e1186fb523a
- **SANOFI** (tenpercentowner) — https://whiteintel.dev/entity/5a1dda06-659f-5840-9a60-6cd4841e0c36
- **SANOFI-AVENTIS AMERIQUE DU NORD S.N.C.** (tenpercentowner) — https://whiteintel.dev/entity/08592d45-dbec-56ef-a39c-6ac987140d74

### Holdings / subsidiaries

- **DECIBEL THERAPEUTICS, INC.** (tenpercentowner) — https://whiteintel.dev/entity/62f3ae6d-d1ff-57f3-bc17-1dec97ac0fcd
- **Adverum Biotechnologies, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/2e479e2e-9ea8-5cf7-a7a3-5d423cc5e323

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

A **53-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 **REGENERON PHARMACEUTICALS, INC.** — https://whiteintel.dev/entity/4c94c46c-66cf-5651-b60a-46242ce9fe83 · pricing https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **REGENERON PHARMACEUTICALS, INC.**. Human view: https://whiteintel.dev/entity/4c94c46c-66cf-5651-b60a-46242ce9fe83 · Structured JSON: https://whiteintel.dev/api/public/dossier/4c94c46c-66cf-5651-b60a-46242ce9fe83._

_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"._