---
title: "QUADRA MARINE SERVICES LIMITED — Ownership Dossier"
canonical: https://whiteintel.dev/entity/ec998d6f-586e-511d-9203-174950e76c71
json: https://whiteintel.dev/api/public/dossier/ec998d6f-586e-511d-9203-174950e76c71
identifier: oo:GB-COH-07385045
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# QUADRA MARINE SERVICES LIMITED

**Type:** Company  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `oo:GB-COH-07385045`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/ec998d6f-586e-511d-9203-174950e76c71  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/ec998d6f-586e-511d-9203-174950e76c71  

## Ownership & control

### Owners / controllers

- **Mrs Gwyneth Elaine Jones** (beneficial owner) — 50% — https://whiteintel.dev/entity/de9131e6-3fe6-52a8-b5bf-5578f7c58fdd
- **Mr Alun Jones** (beneficial owner) — 50% — https://whiteintel.dev/entity/772eb4b2-a35d-554d-91a1-c0cb2289396e
- **Mrs Gwyneth Elaine Jones** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/ff911537-b6e4-414e-b5da-97cb33103aba
- **Mr Alun Jones** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/bde5a4e7-2e6f-4aa5-a15c-5d7d675b2fcf

### 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:** `07385045`
- **Status:** active
- **Type:** ltd
- **Incorporated:** 2010-09-23
- **Registered office:** Milford Marina, The Docks, Milford Haven, SA73 3AX, Wales
- **SIC:** 33150

### Officers

- HOWE, Catrin Angharad — director · British · appointed 2011-01-28
- HOWE, Louis Francis — director · British · appointed 2026-05-07
- JONES, Gwyneth Elaine — director · British · appointed 2020-07-28
- JONES, Alun Pugh — director · British · appointed 2010-09-23 · resigned 2011-01-28
- JONES, Gwyneth Elaine — director · British · appointed 2010-09-23 · resigned 2011-01-28

### Beneficial owners (Persons with Significant Control)

- Mrs Gwyneth Elaine Jones — 25–50% shares · individual PSC · Wales — since 2016-04-06
- Mr Alun Jones — 25–50% shares · individual PSC · Wales — ceased 2026-01-01

## Provenance

- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/07385045
- companies_house_bulk — https://find-and-update.company-information.service.gov.uk/company/07385045

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **QUADRA MARINE SERVICES LIMITED**. Human view: https://whiteintel.dev/entity/ec998d6f-586e-511d-9203-174950e76c71 · Structured JSON: https://whiteintel.dev/api/public/dossier/ec998d6f-586e-511d-9203-174950e76c71._

_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"._