Amentum Clean Energy Limited

Amentum Clean Energy Limited (Companies House no. 01120437) appears as the supplier on 14 public contracts in our data, worth £44.4m as published. 4 of them end between 7 Jan 2027 and 7 Apr 2028.

View on Companies House · Self-declared size on notices: LARGE

Buyers

Nuclear Waste Services Limited (2)Sellafield Limited (2)Sellafield Ltd (2)BlueLight Commercial Limited (1)Defence Infrastructure Organisation (1)Nuclear Restoration Services Limited (Dounreay) (1)Nuclear Decommissioning Authority (1)Nuclear Waste Services (1)UK Atomic Energy Authority (1)Nuclear Restoration Services Ltd (1)

Contracts ending in the radar window

Contract	Buyer	Incumbent supplier(s)	Value	Ends	Region
GK26-11 - In-active Drying Trials of AGR Slotted Cans (Investigating Impact of Caustic Dosing and Carbon Deposits) call-off Contracts Finder · CPV 73000000	Nuclear Decommissioning Authority	Amentum Clean Energy Limited	£360k	31 Jan 2028 re-tender likely from ~31 Jul 2027	North West
DNWP0071/LOT1A/CALDER Ring Fence call-off Contracts Finder · CPV 98391000	Sellafield Ltd	Amentum Clean Energy Limited	£479k	14 May 2027 re-tender likely from ~14 Nov 2026	North West
Alternative Solutions Bulk Order Further Comp (dummy) call-off Contracts Finder · CPV 90521000	Nuclear Waste Services	Amentum Clean Energy Limited	£1.3m	30 Apr 2027 re-tender likely from ~30 Oct 2026	North West
DNWP0039/LOT1A/Management Team FY26/27 call-off Contracts Finder · CPV 71541000	Sellafield Limited	Amentum Clean Energy Limited	£4.1m	31 Mar 2027 re-tender may already be under way	North West

All contracts

Contract	Buyer	Incumbent supplier(s)	Value	Ends	Region
BLC-0201 - Cyber Security Services Framework framework · 6 suppliers Find a Tender · CPV 48931000	BlueLight Commercial Limited	Amentum Clean Energy Limited, NCC GROUP SECURITY SERVICES LIMITED, Roc Technologies Limited +3 more	£8.0m	7 Jun 2034 re-tender likely from ~7 Dec 2033	UK-wide
TECHNICAL SUPPORT PROVIDER (TSP): MUNITIONS (DM) GOSPORT - WATERFRONT MUNITIONS HANDLING FACILITY (WMHF) - BEDENHAM PIER call-off Contracts Finder · CPV 71356300	Defence Infrastructure Organisation	Amentum Clean Energy Ltd	£4.5m	30 Apr 2029 re-tender likely from ~30 Oct 2028	South East
ThermoChimie Phase 4 Lot 3 framework · 5 suppliers Find a Tender · CPV 73000000	Nuclear Waste Services Limited	Amentum Clean Energy Limited, Amphos 21 Consulting S.L., BRGM +2 more	£625k	31 Mar 2029 re-tender likely from ~30 Sep 2028	North West
ThermoChimie Phase 4 Lot 4 framework · 4 suppliers Find a Tender · CPV 73000000	Nuclear Waste Services Limited	Amentum Clean Energy Limited, Amphos 21 Consulting S.L., BRGM +1 more	£625k	31 Mar 2029 re-tender likely from ~30 Sep 2028	North West
DNWP0072/LOT1A/ THB Demolition Phases 1-5 call-off Contracts Finder · CPV 98391000	Sellafield Limited	Amentum Clean Energy Limited	£14.8m	9 Sep 2028 re-tender likely from ~9 Mar 2028	North West
Waste Characterisation Support on the Dounreay site. call-off Contracts Finder · CPV 71356300	Nuclear Restoration Services Limited (Dounreay)	Amentum Clean Energy Limited, AtkinsRéalis UK Limited, Cavendish Nuclear +1 more	£3.0m	31 Aug 2028 re-tender likely from ~29 Feb 2028	Scotland
DNWP0040/LOT1A/ HEx-1 Laydown area excavation and pour call-off Contracts Finder · CPV 45221210	Sellafield Ltd	Amentum Clean Energy Limited	£3.4m	1 May 2028 re-tender likely from ~1 Nov 2027	North West
GK26-11 - In-active Drying Trials of AGR Slotted Cans (Investigating Impact of Caustic Dosing and Carbon Deposits) call-off Contracts Finder · CPV 73000000	Nuclear Decommissioning Authority	Amentum Clean Energy Limited	£360k	31 Jan 2028 re-tender likely from ~31 Jul 2027	North West
DNWP0071/LOT1A/CALDER Ring Fence call-off Contracts Finder · CPV 98391000	Sellafield Ltd	Amentum Clean Energy Limited	£479k	14 May 2027 re-tender likely from ~14 Nov 2026	North West
Alternative Solutions Bulk Order Further Comp (dummy) call-off Contracts Finder · CPV 90521000	Nuclear Waste Services	Amentum Clean Energy Limited	£1.3m	30 Apr 2027 re-tender likely from ~30 Oct 2026	North West
DNWP0039/LOT1A/Management Team FY26/27 call-off Contracts Finder · CPV 71541000	Sellafield Limited	Amentum Clean Energy Limited	£4.1m	31 Mar 2027 re-tender may already be under way	North West
Contracts for Innovation Competition Fusion Industry Challenges: Novel shielding materials and technologies for fusion Contracts Finder · CPV 73000000	UK Atomic Energy Authority	Aegis Fibretech Ltd, Amentum Clean Energy Ltd, First Light Fusion Ltd +8 more	£3.1m	31 Mar 2026 re-tender may already be under way	South East
Harwell B418 ecological surveys - Preliminary Ecological Appraisal (PEA) call-off Contracts Finder · CPV 79311300	Nuclear Restoration Services Ltd	Amentum Clean Energy Limited	£8,214	31 Oct 2025 re-tender may already be under way	South East
Incident Planning Operations May & June 2025 Find a Tender · CPV 90722200	Department of Environment, Food and Rural Affairs	Amentum Clean Energy Limited	£31k	end date not published	UK-wide

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Contains public sector information licensed under the Open Government Licence v3.0. Data from Find a Tender and Contracts Finder; updated every 2 hours. Where a notice doesn't publish a contract end date we show "end date not published" - we never guess.