AMENTUM (UK) LTD.
ActiveKey figures
† AMENTUM (UK) LTD. filed these accounts on paper, so Companies House publishes them only as a scanned image. The figures for the years marked † were read automatically from the scan and kept only where the statements add up (for example net assets equal total equity), but a reading error is still possible — check the original accounts at Companies House.
Ratios
2023/24Sector comparison
SIC 39000Where the company stands among the 2,737 active companies whose first SIC code is 39000 (Remediation activities and other waste management services).
- ABLE UK LIMITED£1.3bn
- RECONOMY (UK) LIMITED£72m
- TOTAL WASTE MANAGEMENT ALLIANCE LIMITED£49m
- AMENTUM (UK) LTD.£31.2m
- M J CHURCH (PLANT) LIMITED£31.2m
- DYNAMIC GROUND SOLUTIONS LIMITED£25.4m
- INDAVER UK LIMITED£21.1m
- FCC WASTE MANAGEMENT LIMITED£19.3m
- A-GAS (UK) LIMITED£19.3m
- P. JOHNSON & SON (1976) LIMITED£19.1m
Positions are approximate. Figures come from each company's latest accounts; money and employee figures are compared only with companies that filed accounts in pounds for a period ending in the last two and a half years and are not dormant, so those groups are smaller than 2,737. The line on each bar marks the median.
Summary: AMENTUM (UK) LTD.
What kind of company is it?
AMENTUM (UK) LTD. is a private limited company registered with Companies House under company number 03909808. It was incorporated on 19 Jan 2000. Its status is active. The registered office is in Warrington (WA3). Its nature of business (SIC 2007) is remediation activities and other waste management services (39000).
How is the company doing financially?
The latest accounts in the database are for 2023/24 (period ending 27 Sep 2024); the company files full accounts. Turnover was £154,588,000. Net assets were £31,238,000, up 99.7% on the previous year. Cash at bank and in hand was £2,229,000. Total assets were £68,157,000 and total liabilities £162,000. The company had an average of 311 employees. Figures are available for 2 financial years (2022/23–2023/24).
How does it compare with similar companies?
Compared with 2,737 active companies whose first SIC code is 39000: By turnover it ranks higher than 97% of the 101 that publish turnover (median £9,214,936). By net assets it ranks higher than 99% of them (median £34,946). By total assets it ranks higher than 99% of them (median £130,847). By cash it ranks higher than 95% of them (median £47,495). By number of employees it ranks higher than 99% of them (median 2). It is older than 93% of them (median age 7.8 years).
Does it supply the public sector?
The company is named as a supplier in 5 public contract award notices from 5 public sector buyers since 2019. Contracts awarded to it alone have a combined published value of £290.4k. 2 of the awards are shared with other suppliers, typically framework agreements.
What do public registers and reports show?
It appears on the Home Office register of licensed sponsors (Global Business Mobility: Senior or Specialist Worker, Skilled Worker). HMRC lists it as an importer of goods, mainly iron and steel articles, optical, medical and measuring instruments, miscellaneous chemicals. HMRC lists it as an exporter of goods, mainly optical, medical and measuring instruments. In its latest payment practices report it took an average of 31 days to pay suppliers, and 31% of invoices were not paid within agreed terms. Its gender pay gap report for 2025/26 shows median hourly pay for women 42.7% lower than for men.
Who runs and controls the company?
One person with significant control is registered.
When are its next filings due?
The next accounts are due by 30 Sep 2026. The next confirmation statement is due by 9 Aug 2027.
Filed accounts2022/23–2023/24
| 2022/23 † | 2023/24 † | |
|---|---|---|
| Turnover | 103,591,000 | 154,588,000 |
| Cash at bank and in hand | 16,467,000 | 2,229,000 |
| Total assets | 36,256,000 | 68,157,000 |
| Total liabilities | 283,000 | 162,000 |
| Net assets / total equity | 15,639,000 | 31,238,000 |
| Average number of employees | 210 | 311 |
A dash (—) means no accounts were filed for that year or the item is not in the accounts; 0 is a zero stated in the accounts. Small companies usually file only a balance sheet, so the profit and loss account is often missing.
Public contracts
5 contractsAMENTUM (UK) LTD. is named as a supplier in 5 public contract award notices from 5 public sector buyers since 2019. The 3 contracts awarded to it alone with a published value add up to £290.4k. 2 awards are shared with other suppliers and not counted in that total.
- CTM Portal for the NDA Shared Services Alliance
- 1 contract · £183.5k
- NRS Ltd
- 1 contract · £57.5k
- NUCLEAR RESTORATION SERVICES LIMITED
- 1 contract · £49.3k
- Department for Environment Food & Rural Affairs
- 1 contract
- Dounreay Site Restoration Limited
- 1 contract
- CBRN Remediation Services Framework - 2026Department for Environment Food & Rural Affairs · shared by 3 suppliers · runs until Mar 2034
- Winfrith Sludge analysis‡NRS Ltd · £57,516
- Review of Hazard Evaluation and Consequence Assessment (HECA) Report‡NUCLEAR RESTORATION SERVICES LIMITED · £49,290
- Support in delivering the High-Heat-Generating Waste (HHGW) Package Specifications‡CTM Portal for the NDA Shared Services Alliance · £183,547
- Framework Agreement for Decommissioning Services‡Dounreay Site Restoration Limited · shared by 6 suppliers, up to £400,000,000 in total
From contract award notices on Contracts Finder (since 2016) and Find a Tender (since 2021), published by the Cabinet Office under the Open Government Licence v3.0. Values are as published by the buyer and usually cover the whole contract term; the total leaves out awards shared between several suppliers, where the published figure is a ceiling for all of them, placeholder values and single figures of £1 billion or more. Notices marked ‡ do not state a company number and were linked by an exact match on the registered name. Contracts below the publication thresholds and those of devolved buyers that publish elsewhere are not included.
Statutory reporting
- Average time taken to pay invoices
- 31 days
- Invoices not paid within agreed terms
- 31%
- Standard payment terms
- 30–45 days
- Within 30 days 85%
- 31 to 60 days 10%
- After 60 days 5%
Earlier periods (1)
- Period ending
- Days to pay
- Within 30 days
- Late
- 31 Mar 2024
- 23
- 78%
- 30%
- Median hourly pay
- women 42.7% lower
- Mean hourly pay
- women 28.3% lower
- Median bonus pay
- women 19% lower
- Employer size
- 250 to 499 employees
Earlier years (1)
- Year
- Median hourly pay
- Mean hourly pay
- 2024/25
- women 44.7% lower
- women 30.3% lower
A positive gap means women's average hourly pay is lower than men's across the whole employer; it is not a comparison of pay for the same work. View on the Gender pay gap service
Figures the company reported itself to the government's Check payment practices service, Gender pay gap service and Modern slavery statement registry (Open Government Licence v3.0). Only large companies and employers with 250 or more staff have to report, so most companies have nothing here.
Registers and licences
- Licence type and rating
- Worker (A rating)
- Routes
- Global Business Mobility: Senior or Specialist Worker, Skilled Worker
On the Home Office register of licensed sponsors, which lists organisations licensed to sponsor workers from overseas.
Listed by HMRC as an importer of goods in 9 of the last 12 months on record, most recently July 2026. Main goods: iron and steel articles, optical, medical and measuring instruments, miscellaneous chemicals, plastics and machinery.
Listed by HMRC as an exporter of goods in 1 of the last 12 months on record, most recently February 2026. Main goods: optical, medical and measuring instruments.
From HMRC's monthly lists of importers and exporters. Traders can ask to be left off the lists, so absence does not mean a company does not trade.
Sources: Charity Commission for England and Wales, Care Quality Commission, Home Office and HM Revenue & Customs, under the Open Government Licence v3.0. Entries marked ‡ come from lists that do not state a company number and were linked by an exact match on the registered name.
History
11 events- Financial year 2023/24 endedAccounts: turnover £154.6m, net assets £31.2m, 311 employees
- Financial year 2022/23 endedAccounts: turnover £103.6m, net assets £15.6m, 210 employees
- Amentum N&E Uk Limited ceased to be a person with significant control
- Name changed to AMENTUM (UK) LTD.Previously AECOM E&C UK LIMITED
- Amentum International Holdings Uk Ltd registered as a person with significant control
- Amentum N&E Uk Limited registered as a person with significant control
- Aecom International Holdings Uk Limited ceased to be a person with significant control
- Name changed to AECOM E&C UK LIMITEDPreviously URS E&C UK LIMITED
Earlier events (3)
- Aecom International Holdings Uk Limited registered as a person with significant control
- Name changed to URS E&C UK LIMITEDPreviously WASHINGTON E & C LIMITED
- Company incorporatedPrivate limited company
Dates as recorded at Companies House: incorporation, name changes, officer appointments and resignations, current and former persons with significant control, and the end of each financial year with figures in the database.