---
title: "QUANTITATIVE RISK MANAGEMENT LIMITED — Ownership Dossier"
canonical: https://whiteintel.dev/entity/e12c970e-e288-58e6-8071-50cf57a87d03
json: https://whiteintel.dev/api/public/dossier/e12c970e-e288-58e6-8071-50cf57a87d03
identifier: oo:GB-COH-04624883
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# QUANTITATIVE RISK MANAGEMENT LIMITED

**Type:** Company  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `oo:GB-COH-04624883`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/e12c970e-e288-58e6-8071-50cf57a87d03  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/e12c970e-e288-58e6-8071-50cf57a87d03  

## Ownership & control

### Owners / controllers

- **Serdar Sirri Ayaydin** (beneficial owner) — https://whiteintel.dev/entity/fa48a90a-eefc-53f8-bc13-1ddd51b2e924
- **Mr Stephen Reese Rigsbee** (beneficial owner) — https://whiteintel.dev/entity/a8b42543-2450-5dad-b79b-d0e319a47c55
- **Mr Henry Colerick Norwood** (beneficial owner) — https://whiteintel.dev/entity/255330d7-3572-5cf4-a9a2-91dd382c41c3
- **Mr Stephen Reese Rigsbee** (beneficial owner) — https://whiteintel.dev/entity/86955cfc-219b-4f79-b62c-ff0ae11bfc56
- **Mr Henry Colerick Norwood** (beneficial owner) — https://whiteintel.dev/entity/6c0f9cac-2e14-4ecf-a7a0-2f30f48eda34
- **Quattro Business Solutions B.V.** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/8411fa7e-ee1b-4b37-bce9-280b76028bce
- **Serdar Sirri Ayaydin** (beneficial owner) — https://whiteintel.dev/entity/9129e0c3-06bf-43fe-bb1e-3701c3768730

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

A **7-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:** `04624883`
- **Status:** active
- **Type:** ltd
- **Incorporated:** 2002-12-24
- **Registered office:** 21 Holborn Viaduct, London, EC1A 2DY
- **SIC:** 82990

### Officers

- NORWOOD, Henry Colerick — secretary · appointed 2023-09-01
- SISEC LIMITED — corporate secretary · appointed 2004-10-06
- AYAYDIN, Serdar Sirri — director · American · appointed 2003-02-07
- NORWOOD, Henry Colerick — director · American · appointed 2012-01-27
- AYAYDIN, Serdar Sirri — secretary · American · appointed 2003-02-07 · resigned 2023-09-01
- ABOGADO NOMINEES LIMITED — corporate secretary · appointed 2003-02-05 · resigned 2004-08-27
- THE COMPANY REGISTRATION AGENTS LIMITED — corporate nominee secretary · appointed 2002-12-24 · resigned 2003-02-05
- RIGSBEE, Stephen Reese — director · American · appointed 2003-02-07 · resigned 2025-12-20
- ABOGADO CUSTODIANS LIMITED — corporate nominee director · appointed 2003-02-05 · resigned 2003-02-07
- ABOGADO NOMINEES LIMITED — corporate director · appointed 2003-02-05 · resigned 2003-02-07
- LUCIENE JAMES LIMITED — corporate nominee director · appointed 2002-12-24 · resigned 2003-02-05

### Beneficial owners (Persons with Significant Control)

- Serdar Sirri Ayaydin — significant influence or control · individual PSC · United States — ceased 2026-01-01
- Mr Henry Colerick Norwood — significant influence or control · individual PSC · United States — ceased 2026-01-01
- [Quantitative Risk Management, Inc.](https://whiteintel.dev/entity/8411fa7e-ee1b-4b37-bce9-280b76028bce) — 75–100% shares · corporate PSC · United States — ceased 2026-01-01
- Mr Stephen Reese Rigsbee — significant influence or control · individual PSC · United States — ceased 2025-12-20

## Provenance

- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/04624883
- companies_house_bulk — https://find-and-update.company-information.service.gov.uk/company/04624883

## 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 **QUANTITATIVE RISK MANAGEMENT LIMITED** — https://whiteintel.dev/entity/e12c970e-e288-58e6-8071-50cf57a87d03 · pricing https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **QUANTITATIVE RISK MANAGEMENT LIMITED**. Human view: https://whiteintel.dev/entity/e12c970e-e288-58e6-8071-50cf57a87d03 · Structured JSON: https://whiteintel.dev/api/public/dossier/e12c970e-e288-58e6-8071-50cf57a87d03._

_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"._