---
title: "SIMPSON GRAHAM LIMITED — Ownership Dossier"
canonical: https://whiteintel.dev/entity/8db6c2eb-ec45-5b3e-a22c-3217dada3d95
json: https://whiteintel.dev/api/public/dossier/8db6c2eb-ec45-5b3e-a22c-3217dada3d95
identifier: oo:GB-COH-15003538
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# SIMPSON GRAHAM LIMITED

**Type:** Company  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `oo:GB-COH-15003538`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/8db6c2eb-ec45-5b3e-a22c-3217dada3d95  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/8db6c2eb-ec45-5b3e-a22c-3217dada3d95  

## Ownership & control

### Owners / controllers

- **Mr Mark Andrew Graham** (beneficial owner) — 50% — https://whiteintel.dev/entity/a28f4853-dd06-5b66-9ed7-8df08bd22b0a
- **Ms Harriet Emma Simpson** (beneficial owner) — 50% — https://whiteintel.dev/entity/4f9a7264-f8ae-58ad-af14-90bac69c2f2e
- **Mr Mark Andrew Graham** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/7584f4aa-4df5-4095-82a3-33fe6fabc4c1
- **Ms Harriet Emma Simpson** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/ba66046f-70a9-4baf-b802-39903a512b8d

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

A **4-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.

## Company profile (live · UK Companies House)

- **Company number:** `15003538`
- **Status:** active
- **Type:** ltd
- **Incorporated:** 2023-07-14
- **Registered office:** Haxton, Central House, 124 High Street, Hampton Hill, Middlesex, TW12 1NS, United Kingdom
- **SIC:** 75000

### Officers

- GRAHAM, Mark Andrew — director · British · appointed 2023-07-14
- SIMPSON, Harriet Emma — director · British · appointed 2023-07-14

### Beneficial owners (Persons with Significant Control)

- Mr Mark Andrew Graham — 25–50% shares · individual PSC · United Kingdom — since 2023-07-14
- Ms Harriet Emma Simpson — 25–50% shares · individual PSC · United Kingdom — since 2023-07-14

## Provenance

- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/15003538
- companies_house_bulk — https://find-and-update.company-information.service.gov.uk/company/15003538

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **SIMPSON GRAHAM LIMITED**. Human view: https://whiteintel.dev/entity/8db6c2eb-ec45-5b3e-a22c-3217dada3d95 · Structured JSON: https://whiteintel.dev/api/public/dossier/8db6c2eb-ec45-5b3e-a22c-3217dada3d95._

_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"._