---
title: "Berkshire Hathaway Inc — Ownership Dossier"
canonical: https://whiteintel.dev/entity/26a118bb-844d-5d9a-8233-d983fc42f6fb
json: https://whiteintel.dev/api/public/dossier/26a118bb-844d-5d9a-8233-d983fc42f6fb
identifier: oo:GB-COH-01144080
risk: Low
source: WhiteIntel corporate-ownership graph
---

# Berkshire Hathaway Inc

**Type:** Company  
**Identifier:** `oo:GB-COH-01144080`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/26a118bb-844d-5d9a-8233-d983fc42f6fb  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/26a118bb-844d-5d9a-8233-d983fc42f6fb  

## Ownership & control

### Owners / controllers

- **Mr David Penn** (beneficial owner) — https://whiteintel.dev/entity/3a6eb69d-9b7f-5206-bcee-b949e0fcf44d
- **Mr Brian Diaz** (beneficial owner) — https://whiteintel.dev/entity/4ffe17ed-dffc-5f3e-8e3f-76369d2891fe
- **Mr David Penn** (beneficial owner) — https://whiteintel.dev/entity/8dc15695-32b2-45af-9bb6-49aec0a60a84
- **Mr Mark James Adam Kalinowski** (beneficial owner) — https://whiteintel.dev/entity/1c9b79b1-ed03-4bfa-bdbf-02b7d89bee77
- **Berkshire Hathaway Inc** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/f90806c1-206c-41ad-8bcc-5ee37060c941
- **Mr Brian Diaz** (beneficial owner) — https://whiteintel.dev/entity/49bdb01a-c8d0-484a-9aa7-2d39fce029d3

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

A **6-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.

## Provenance

- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/01144080

## 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 **Berkshire Hathaway Inc** — https://whiteintel.dev/entity/26a118bb-844d-5d9a-8233-d983fc42f6fb · pricing https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Berkshire Hathaway Inc**. Human view: https://whiteintel.dev/entity/26a118bb-844d-5d9a-8233-d983fc42f6fb · Structured JSON: https://whiteintel.dev/api/public/dossier/26a118bb-844d-5d9a-8233-d983fc42f6fb._

_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"._