---
title: "HilleVax, Inc. — Ownership Dossier"
canonical: https://whiteintel.dev/entity/440f48e0-0591-5c4e-ad01-b130a9de9705
json: https://whiteintel.dev/api/public/dossier/440f48e0-0591-5c4e-ad01-b130a9de9705
identifier: sec:0001888012
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# HilleVax, Inc.

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001888012`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/440f48e0-0591-5c4e-ad01-b130a9de9705  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/440f48e0-0591-5c4e-ad01-b130a9de9705  

## Ownership & control

### Owners / controllers

- **Heron Patrick J** (tenpercentowner) — https://whiteintel.dev/entity/dd84b832-00e7-5b82-a731-49c671fe4068
- **FHMLS X, L.P.** (tenpercentowner) — https://whiteintel.dev/entity/3b18f617-4abb-5fb3-8eba-19e135472210
- **FRAZIER LIFE SCIENCES X, L.P.** (tenpercentowner) — https://whiteintel.dev/entity/7fb1e302-276e-5736-bbf2-f0c3fd564dfd
- **TAKEDA VACCINES, INC.** (tenpercentowner) — https://whiteintel.dev/entity/255c360b-135b-50c3-9fc8-d5ac1e6250f4
- **TAKEDA PHARMACEUTICAL CO LTD** (tenpercentowner) — https://whiteintel.dev/entity/4bf315f3-ff14-5761-9d53-c9dd75c5da78
- **Topper James N** (tenpercentowner) — https://whiteintel.dev/entity/849d011c-8ad7-5b5a-a99e-cfbdbf1b1e09
- **FHMLS X, L.L.C.** (tenpercentowner) — https://whiteintel.dev/entity/9f06a282-a10a-5192-bd90-04b2edb3bce5

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

A **56-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 **HilleVax, Inc.** — https://whiteintel.dev/entity/440f48e0-0591-5c4e-ad01-b130a9de9705 · pricing https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **HilleVax, Inc.**. Human view: https://whiteintel.dev/entity/440f48e0-0591-5c4e-ad01-b130a9de9705 · Structured JSON: https://whiteintel.dev/api/public/dossier/440f48e0-0591-5c4e-ad01-b130a9de9705._

_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"._