---
title: "AMENTUM E&C LIMITED — Ownership Dossier"
canonical: https://whiteintel.dev/entity/342e4d6d-e0db-5c82-8857-4ddcd5030d79
json: https://whiteintel.dev/api/public/dossier/342e4d6d-e0db-5c82-8857-4ddcd5030d79
identifier: oo:GB-COH-04967961
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# AMENTUM E&C LIMITED

**Type:** Company  
**Jurisdiction:** GB  
**Identifier:** `oo:GB-COH-04967961`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/342e4d6d-e0db-5c82-8857-4ddcd5030d79  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/342e4d6d-e0db-5c82-8857-4ddcd5030d79  

## Ownership & control

### Owners / controllers

- **JACOBS U.K. LIMITED** (beneficial owner) — 100% — https://whiteintel.dev/entity/3ecd06f3-6c7a-5b2f-9a48-ba182e9319b9
- **WORLEY FIELD SERVICES LIMITED** (beneficial owner) — 100% — https://whiteintel.dev/entity/bbce3f70-3eb3-5fa1-b101-2f9dbe2d4530
- **JACOBS U.K. LIMITED** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/3ecd06f3-6c7a-5b2f-9a48-ba182e9319b9
- **Jacobs Process Limited** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/22a105bb-488a-49b3-8e59-b396e77e8341
- **ENERGY, SECURITY AND TECHNOLOGY UK LIMITED** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/f13f53bb-bac9-52a1-a2c1-9f0c832850b8

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

A **26-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:** `04967961`
- **Status:** active
- **Type:** ltd
- **Incorporated:** 2003-11-18
- **Registered office:** 305 Bridgewater Place, Birchwood Park, Warrington, WA3 6XF, United Kingdom
- **SIC:** 41100, 71121, 74100

### Officers

- PRENTICE, Joshua David — secretary · appointed 2024-06-01
- JONES, Loren Michael — director · British · appointed 2025-10-01
- SHAW, Martin Warwick — director · British · appointed 2025-05-12
- CHAUDHARY, Tejender — secretary · appointed 2018-06-01 · resigned 2023-02-10
- CONNELL, David Richard — secretary · British · appointed 2003-12-08 · resigned 2004-08-31
- FERNIE, John William David — secretary · British · appointed 2004-12-01 · resigned 2011-12-20
- GAMBLE, Nigel William — secretary · British · appointed 2004-09-13 · resigned 2004-12-01
- HOLMAN, Rhona Mary — secretary · appointed 2023-02-10 · resigned 2023-08-21
- NORRIS, Michael Timothy — secretary · appointed 2011-12-20 · resigned 2018-06-01
- ROBERTS, Geoffrey — secretary · appointed 2023-08-21 · resigned 2024-06-01
- SWIFT INCORPORATIONS LIMITED — corporate nominee secretary · appointed 2003-11-18 · resigned 2003-11-18
- TH GROUP SERVICES LIMITED — corporate secretary · appointed 2003-11-18 · resigned 2003-12-08
- CNOSSEN, Johan Piet — director · Dutch · appointed 2010-02-11 · resigned 2011-09-22
- DOYLE, John Conor — director · Irish · appointed 2013-10-18 · resigned 2016-10-07
- ELLIS, David — director · British · appointed 2019-06-03 · resigned 2020-12-09
- FLEETWOOD, Michael William — director · British · appointed 2011-09-22 · resigned 2014-09-25
- GORDON, Douglas Alexander — director · British · appointed 2008-09-12 · resigned 2011-09-22
- IRVIN, Robert Anthony Michael, Dr — director · British · appointed 2011-09-22 · resigned 2013-10-18
- LAYCOCK, Rufus — director · British · appointed 2003-11-18 · resigned 2003-12-08
- LEGGETT, Mark Richard — director · British · appointed 2004-09-13 · resigned 2006-02-17

### Beneficial owners (Persons with Significant Control)

- [Energy, Security And Technology Uk Limited](https://whiteintel.dev/entity/f13f53bb-bac9-52a1-a2c1-9f0c832850b8) — 75–100% shares · corporate PSC · England — since 2024-06-12
- [Jacobs U.K. Limited](https://whiteintel.dev/entity/3ecd06f3-6c7a-5b2f-9a48-ba182e9319b9) — 75–100% shares · corporate PSC · United Kingdom — ceased 2024-06-12
- [Jacobs Process Limited](https://whiteintel.dev/entity/22a105bb-488a-49b3-8e59-b396e77e8341) — 75–100% shares · corporate PSC · England — ceased 2019-02-28

## Provenance

- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/04967961
- companies_house_bulk — https://find-and-update.company-information.service.gov.uk/company/04967961

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **AMENTUM E&C LIMITED**. Human view: https://whiteintel.dev/entity/342e4d6d-e0db-5c82-8857-4ddcd5030d79 · Structured JSON: https://whiteintel.dev/api/public/dossier/342e4d6d-e0db-5c82-8857-4ddcd5030d79._

_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"._