---
title: "Marta Mariani — Ownership Dossier"
canonical: https://whiteintel.dev/entity/5de8dfbb-5d81-5b14-9d8a-be79bbb94801
json: https://whiteintel.dev/api/public/dossier/5de8dfbb-5d81-5b14-9d8a-be79bbb94801
identifier: oo-person:GB-COH-PER-07718151-CnS56_oTBTac-uLIbY62Q52Jl40
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# Marta Mariani

**Type:** Person  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `oo-person:GB-COH-PER-07718151-CnS56_oTBTac-uLIbY62Q52Jl40`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/5de8dfbb-5d81-5b14-9d8a-be79bbb94801  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/5de8dfbb-5d81-5b14-9d8a-be79bbb94801  

## Ownership & control

### Holdings / subsidiaries

- **PORTMAN HOUSE LIMITED** (beneficial owner) — 100% — https://whiteintel.dev/entity/aff73464-e386-59ab-9f61-353f2fd6a630

## Provenance

- OpenOwnership — https://www.openownership.org

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Marta Mariani**. Human view: https://whiteintel.dev/entity/5de8dfbb-5d81-5b14-9d8a-be79bbb94801 · Structured JSON: https://whiteintel.dev/api/public/dossier/5de8dfbb-5d81-5b14-9d8a-be79bbb94801._

_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"._