---
title: "Castellum Holdings Ltd. — Ownership Dossier"
canonical: https://whiteintel.dev/entity/f116cd20-e36b-53b3-a233-06e002af4689
json: https://whiteintel.dev/api/public/dossier/f116cd20-e36b-53b3-a233-06e002af4689
identifier: icij:icijol-82006942
jurisdiction: BM
risk: High
source: WhiteIntel corporate-ownership graph
---

# Castellum Holdings Ltd.

**Type:** Company  
**Jurisdiction:** BM  
**Identifier:** `icij:icijol-82006942`  
**Risk level:** High  
**Canonical dossier:** https://whiteintel.dev/entity/f116cd20-e36b-53b3-a233-06e002af4689  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/f116cd20-e36b-53b3-a233-06e002af4689  

## Ownership & control

### Owners / controllers

- **Hannover Re (Bermuda) Ltd.** (shareholder of) — https://whiteintel.dev/entity/165eea0f-57e2-5b7f-8dc5-5e224be0739d

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

A **64-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.

## Exposure (derived from the ownership graph)

**18** owners upstream in this entity's ownership/control chain are flagged — a sanctions hit or a secrecy jurisdiction — an investigative lead by resolved identity, not a legal determination. The contributing parties and the hop-by-hop path unlock with a paid API key or a one-off dossier — https://whiteintel.dev/pricing.

## Provenance

- ICIJ Offshore Leaks — https://offshoreleaks.icij.org/nodes/82006942

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Castellum Holdings Ltd.**. Human view: https://whiteintel.dev/entity/f116cd20-e36b-53b3-a233-06e002af4689 · Structured JSON: https://whiteintel.dev/api/public/dossier/f116cd20-e36b-53b3-a233-06e002af4689._

_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"._