---
title: "Mazabraud Yann — Ownership Dossier"
canonical: https://whiteintel.dev/entity/77e5e32d-e693-5549-ae78-281fe421e43b
json: https://whiteintel.dev/api/public/dossier/77e5e32d-e693-5549-ae78-281fe421e43b
identifier: sec:0001774702
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# Mazabraud Yann

**Type:** Person  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001774702`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/77e5e32d-e693-5549-ae78-281fe421e43b  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/77e5e32d-e693-5549-ae78-281fe421e43b  

## Ownership & control

### Holdings / subsidiaries

- **RHYTHM PHARMACEUTICALS, INC.** (officer) — https://whiteintel.dev/entity/fa951071-e445-5c3f-9817-53aaddc9e6a0
- **RHYTHM PHARMACEUTICALS, INC.** (officer) — https://whiteintel.dev/entity/fa951071-e445-5c3f-9817-53aaddc9e6a0
- **RHYTHM PHARMACEUTICALS, INC.** (officer) — https://whiteintel.dev/entity/fa951071-e445-5c3f-9817-53aaddc9e6a0
- **Trevi Therapeutics, Inc.** (officer) — https://whiteintel.dev/entity/2aa1d803-20fb-5be5-ab60-771eefc879d2

## 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 **Mazabraud Yann** — https://whiteintel.dev/entity/77e5e32d-e693-5549-ae78-281fe421e43b · pricing https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Mazabraud Yann**. Human view: https://whiteintel.dev/entity/77e5e32d-e693-5549-ae78-281fe421e43b · Structured JSON: https://whiteintel.dev/api/public/dossier/77e5e32d-e693-5549-ae78-281fe421e43b._

_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"._