AMENTUM CLEAN ENERGY LIMITED
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Next accounts due
2026-06-30 (in 1mo)
Last filed for 2024-09-27
Confirmation statement due
2027-04-24 (in 11mo)
Last made up 2026-04-10
Watchouts
Cash
£50M
+99.3% vs 2023
Net assets
£81M
+225.1% vs 2023
Employees
2,519
+78.4% vs 2023
Profit before tax
-£148K
-101.3% vs 2023
Watchouts
Facts from the Companies House register and the latest accounts — not a rating
-
1 PSC ceased in last 24 months
Significant control changed hands — see the Ownership section.
Name history
Renamed 7 times since incorporation — the current trading name was adopted 2024-09-30
- AMENTUM CLEAN ENERGY LIMITED 2024-09-30 → present
- JACOBS CLEAN ENERGY LIMITED 2020-03-17 → 2024-09-30
- WOOD NUCLEAR LIMITED 2018-09-03 → 2020-03-17
- AMEC FOSTER WHEELER NUCLEAR UK LIMITED 2014-12-12 → 2018-09-03
- AMEC NUCLEAR UK LIMITED 2007-09-03 → 2014-12-12
- AMEC NNC LIMITED 2005-08-08 → 2007-09-03
- NNC LIMITED 1989-04-01 → 2005-08-08
- NATIONAL NUCLEAR CORPORATION LIMITED 1973-06-28 → 1989-04-01
Net assets
2-year trend · vs Industrials median
Accounts
2-year trend · latest reflected 2024-09-27
| Metric | Trend | 2023-09-29 | 2024-09-27 |
|---|---|---|---|
| Turnover | £303,675,000 | £554,399,000 | |
| Operating profit | £11,963,000 | £944,000 | |
| Profit before tax | £11,002,000 | -£148,000 | |
| Net profit | £8,772,000 | -£222,000 | |
| Cash | £25,194,000 | £50,207,000 | |
| Total assets less current liabilities | £30,326,000 | £108,591,000 | |
| Net assets | £24,787,000 | £80,577,000 | |
| Equity | £24,787,000 | £80,577,000 | |
| Average employees | 1,412 | 2,519 | |
| Wages | £105,199,000 | £162,106,000 |
Values shown as filed in the company's annual accounts. — indicates the figure wasn't present under that line item in that period. About these numbers
Ratios
Computed from the line items above — sparklines read oldest → newest
| Ratio | Trend | 2023-09-29 | 2024-09-27 |
|---|---|---|---|
| Operating margin | 3.9% | 0.2% | |
| Net margin | 2.9% | -0.0% | |
| Return on capital employed | 39.4% | 0.9% | |
| Current ratio | 1.24x | 1.63x | |
| Interest cover | 11.08x | 0.73x |
Margins divide P&L lines by turnover. Gearing is liabilities over total assets. Current ratio is current assets over creditors falling due within one year. Interest cover is operating profit over absolute finance costs. Sector-distribution context coming next.
Audit & accounting basis
- Accounting basis
- FRS 101
- Reporting scope
- Standalone (parent only)
- Auditor
- Ernst & Young LLP
- Audit opinion
- Unqualified (clean)
- Going concern
- Affirmed
“If the Company requires assistance to meet its financial obligations, Amentum Holdings LLC would be able to provide support to the Company. The Directors have received a letter of support from Amentum Holdings LLC, confirming it will be able to provide support to the Company, if needed, until 30 April 2027 in order to allow the Company to operate as a going concern.”
Group structure
- AMENTUM CLEAN ENERGY LIMITED · parent
- Melissia sp. z o.o. 100%
Auditor, going-concern and subsidiary information is drawn from the narrative of the latest annual accounts. About these numbers
People
4 active · 40 resigned
| Name | Role | Appointed | Born | Nationality |
|---|---|---|---|---|
| PRENTICE, Joshua David | Secretary | 2024-06-01 | — | — |
| JONES, Loren Michael | Director | 2025-10-01 | Mar 1984 | British |
| LAMB, James Michael | Director | 2026-04-27 | Mar 1981 | British |
| SHAW, Martin Warwick | Director | 2024-12-06 | Sep 1967 | British |
Show 40 resigned officers
| Name | Role | Appointed | Resigned |
|---|---|---|---|
| ASHMAN, Fraser Lionel | Secretary | — | 1991-12-31 |
| CHAUDHARY, Tejender Singh, Mr | Secretary | 2020-06-26 | 2023-02-10 |
| DON CAROLIS, Frazer Anthony | Secretary | 1992-01-01 | 2006-04-01 |
| FELLOWES, Colin | Secretary | 2006-04-01 | 2009-06-16 |
| FIDLER, Christopher Laskey | Secretary | 2009-06-16 | 2016-07-22 |
| HOLMAN, Rhona Mary | Secretary | 2023-02-10 | 2023-08-21 |
| JONES, Iain Angus | Secretary | 2019-04-26 | 2020-03-06 |
| ROBERTS, Geoffrey | Secretary | 2023-08-21 | 2024-06-01 |
| THOMAS, Anthony Mark | Secretary | 2018-02-16 | 2019-03-08 |
| WARBURTON, Jennifer Ann | Secretary | 2016-07-22 | 2018-02-16 |
| ALLAN, Stuart John, Dr | Director | 2002-06-25 | 2005-12-31 |
| ASHMAN, Fraser Lionel | Director | — | 1999-06-30 |
| BOATH, David Hunter | Director | 2002-06-25 | 2010-11-10 |
| CLARKSON, Iain Geoffrey | Director | 2008-02-01 | 2016-01-21 |
| DAVIDSON, Robert James, Sir | Director | — | 1991-06-30 |
| DAVIN, Julie | Director | 2012-07-02 | 2014-03-31 |
| DURSTON, John Graham | Director | 1993-12-10 | 1998-05-11 |
| GEORGE, Brian Victor | Director | 1995-12-01 | 1999-09-06 |
| HIGTON, Peter Desmond | Director | 1999-09-06 | 2007-03-09 |
| HUGHES, Michael John | Director | 2014-03-31 | 2026-04-20 |
| HUTCHINSON, Anthony Peter | Director | — | 1994-05-27 |
| INGHAM, Eric Leslie | Director | 1999-09-06 | 2003-12-31 |
| KERSHAW, Paul Richard | Director | 1998-05-11 | 2005-01-27 |
| LANIGAN, Philip Nicholas | Director | 1999-11-01 | 2005-09-30 |
| LINSEISEN, Anita | Director | 2021-12-01 | 2024-10-21 |
| LLAMBIAS, John Manuel, Dr | Director | 2004-01-01 | 2004-06-14 |
| LONGBOTTOM, Christopher John | Director | 2002-06-25 | 2004-06-10 |
| MARLOR, John Stanley | Director | 1994-07-15 | 1999-09-06 |
| MILES, Sally Linda Joyce | Director | 2020-06-26 | 2021-12-01 |
| NEWLANDS, David Baxter | Director | — | 1995-12-01 |
| OKEEFFE, Nicola Jayne | Director | 2016-01-21 | 2020-06-26 |
| ROUTLEDGE, Kevin Timothy | Director | 1999-09-06 | 2006-02-06 |
| SADLER, Steve | Director | 2005-01-01 | 2008-01-31 |
| SMITH, Derek Randall | Director | — | 1991-01-31 |
| SMITH, Kevin | Director | 2007-05-21 | 2012-07-02 |
| TAYLOR, Derek | Director | — | 1994-04-30 |
| TRAWBER, John Joseph | Director | 1999-09-06 | 2004-07-31 |
| WHITE, Andrew John | Director | 2024-12-06 | 2025-09-30 |
| WHITE, Clive Thomas | Director | 2002-06-25 | 2021-08-16 |
| WIEMELT, Karen | Director | 2021-08-16 | 2024-01-12 |
Ownership
Persons with significant control
| Name | Kind | Nature of control | Notified | Status |
|---|---|---|---|---|
| Energy, Security And Technology Uk Limited | Corporate entity | Shares 75–100%, Voting 75–100%, Appoints directors | 2024-06-12 | Active |
| Jacobs U.K. Limited | Corporate entity | Shares 75–100%, Voting 75–100%, Appoints directors | 2020-03-06 | Ceased 2024-06-12 |
| Wood Nuclear Holdings Limited | Corporate entity | Shares 75–100%, Voting 75–100%, Appoints directors | 2016-04-06 | Ceased 2020-03-06 |
Filing timeline
Last 20 of 248 total filings
Material constitutional events — rename, articles re-file, resolution
- 2024-09-30 CERTNM Certificate change of name company PDF
| Date | Type | Category | Description | |
|---|---|---|---|---|
| 2026-04-29 | AP01 | officers | Appoint person director company with name date | |
| 2026-04-21 | TM01 | officers | Termination director company with name termination date | |
| 2026-04-18 | AA | accounts | Accounts with accounts type full | |
| 2026-04-12 | CS01 | confirmation-statement | Confirmation statement with no updates | |
| 2025-12-03 | DISS40 | gazette | Gazette filings brought up to date | |
| 2025-12-02 | GAZ1 | gazette | Gazette notice compulsory | |
| 2025-10-07 | AP01 | officers | Appoint person director company with name date | |
| 2025-09-30 | TM01 | officers | Termination director company with name termination date | |
| 2025-04-10 | CS01 | confirmation-statement | Confirmation statement with updates | |
| 2025-03-25 | CH01 | officers | Change person director company with change date | |
| 2024-12-09 | AP01 | officers | Appoint person director company with name date | |
| 2024-12-06 | AP01 | officers | Appoint person director company with name date | |
| 2024-11-11 | AD01 | address | Change registered office address company with date old address new address | |
| 2024-10-21 | TM01 | officers | Termination director company with name termination date | |
| 2024-09-30 | PSC05 | persons-with-significant-control | Change to a person with significant control | |
| 2024-09-30 | CERTNM | change-of-name | Certificate change of name company | |
| 2024-09-23 | AD01 | address | Change registered office address company with date old address new address | |
| 2024-09-04 | SH19 | capital | Capital statement capital company with date currency figure | |
| 2024-09-04 | SH20 | capital | Legacy | |
| 2024-09-04 | CAP-SS | insolvency | Legacy |
Public-record activity
Raw counts from Companies House — last 12–24 months
- Filings
- 8
- Capital events
- 2
- Officers appointed
- 2
- Officers resigned
- 2
last 12 months
last 24 months
last 12 months
last 12 months
Direct counts from the register. No score, no rating — see the Filing timeline for the underlying events.
Year-on-year
FY2023 → FY2024 · period ending 2024-09-27 vs 2023-09-29
-
Turnover
+82.6%
£303,675,000 £554,399,000
-
Cash
+99.3%
£25,194,000 £50,207,000
-
Net assets
+225.1%
£24,787,000 £80,577,000
-
Employees
+78.4%
1,412 2,519
-
Operating profit
-92.1%
£11,963,000 £944,000
-
Profit before tax
-101.3%
£11,002,000 -£148,000
-
Wages
+54.1%
£105,199,000 £162,106,000
Each % is (latest − prior) ÷ |prior| for the line item as filed. The comparison is only shown when the latest and prior accounts cover broadly equal-length periods — short or long stubs (typical around incorporation or a year-end change) are suppressed rather than misrepresented. Lines a company doesn't report are omitted. About these numbers