---
title: "MERCK & CO INC — Ownership Dossier"
canonical: https://whiteintel.dev/entity/bec22020-a70a-5831-83f8-8a2ffb475f8c
json: https://whiteintel.dev/api/public/dossier/bec22020-a70a-5831-83f8-8a2ffb475f8c
identifier: sec:0000064978
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# MERCK & CO INC

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0000064978`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/bec22020-a70a-5831-83f8-8a2ffb475f8c  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/bec22020-a70a-5831-83f8-8a2ffb475f8c  

## Ownership & control

### Holdings / subsidiaries

- **Personalis, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/4715ca0e-8ffc-5063-a525-58678f6a9167
- **HARPOON THERAPEUTICS, INC.** (tenpercentowner) — https://whiteintel.dev/entity/f5cf95e6-e3de-5cf1-b76f-e6289d5d9b2e
- **PANDION THERAPEUTICS HOLDCO LLC** (tenpercentowner) — https://whiteintel.dev/entity/060b1392-136a-5cbf-a2ea-51a04af26d41
- **FOX HOLLOW TECHNOLOGIES INC** (tenpercentowner) — https://whiteintel.dev/entity/dcb3043e-57d1-5cc5-849a-6b21474b0142

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

A **44-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 **MERCK & CO INC** — https://whiteintel.dev/entity/bec22020-a70a-5831-83f8-8a2ffb475f8c · pricing https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **MERCK & CO INC**. Human view: https://whiteintel.dev/entity/bec22020-a70a-5831-83f8-8a2ffb475f8c · Structured JSON: https://whiteintel.dev/api/public/dossier/bec22020-a70a-5831-83f8-8a2ffb475f8c._

_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"._