Amentum Clean Energy Limited

Amentum Clean Energy Limited (Companies House no. 01120437) appears as the supplier on 32 public contracts in our data, worth £1.8bn as published. 8 of them end between 8 Jan 2027 and 8 Apr 2028.

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

Buyers

UK Atomic Energy Authority (6)Nuclear Waste Services Limited (5)UK Industrial Fusion Solutions Ltd (4)Sellafield Limited (3)Sellafield Ltd (2)Nuclear Decommissioning Authority (2)BlueLight Commercial Limited (1)Defence Infrastructure Organisation (1)Nuclear Restoration Services Limited (Dounreay) (1)Nuclear Waste Services (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
VIVS Miscellaneous Tests framework · 2 suppliers Find a Tender · CPV 38970000	UK Industrial Fusion Solutions Ltd	Amentum Clean Energy Limited, Kinectrics UK Limited	£700k	30 Nov 2027 re-tender likely from ~30 May 2027	UK-wide
VIVS Mechanical Tests framework · 2 suppliers Find a Tender · CPV 38970000	UK Industrial Fusion Solutions Ltd	ALTRAD BABCOCK LIMITED, Amentum Clean Energy Limited	£700k	30 Nov 2027 re-tender likely from ~30 May 2027	UK-wide
Lot 1 Magnets Materials Mechanical and Thermal tests framework · 3 suppliers Find a Tender · CPV 38970000	UK Industrial Fusion Solutions Ltd	Amentum Clean Energy Limited, NPL Management Limited, University of Strathclyde	£700k	30 Nov 2027 re-tender likely from ~30 May 2027	UK-wide
VIVS Thermophysical Tests framework · 2 suppliers Find a Tender · CPV 38970000	UK Industrial Fusion Solutions Ltd	Amentum Clean Energy Limited, NPL Management Limited	£700k	30 Nov 2027 re-tender likely from ~30 May 2027	UK-wide
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
Embedded Engineering Resource Framework (EERF) framework · 7 suppliers Contracts Finder · CPV 71320000	UK Atomic Energy Authority	Amentum Clean Energy Limited, AtkinsRealis UK Ltd, Baker Hicks Limited +4 more	£9.9m	31 May 2029 re-tender likely from ~30 Nov 2028	South East
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
VIVS Miscellaneous Tests framework · 2 suppliers Find a Tender · CPV 38970000	UK Industrial Fusion Solutions Ltd	Amentum Clean Energy Limited, Kinectrics UK Limited	£700k	30 Nov 2027 re-tender likely from ~30 May 2027	UK-wide
VIVS Mechanical Tests framework · 2 suppliers Find a Tender · CPV 38970000	UK Industrial Fusion Solutions Ltd	ALTRAD BABCOCK LIMITED, Amentum Clean Energy Limited	£700k	30 Nov 2027 re-tender likely from ~30 May 2027	UK-wide
Lot 1 Magnets Materials Mechanical and Thermal tests framework · 3 suppliers Find a Tender · CPV 38970000	UK Industrial Fusion Solutions Ltd	Amentum Clean Energy Limited, NPL Management Limited, University of Strathclyde	£700k	30 Nov 2027 re-tender likely from ~30 May 2027	UK-wide
VIVS Thermophysical Tests framework · 2 suppliers Find a Tender · CPV 38970000	UK Industrial Fusion Solutions Ltd	Amentum Clean Energy Limited, NPL Management Limited	£700k	30 Nov 2027 re-tender likely from ~30 May 2027	UK-wide
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
(05 - SF&NM) GK25-13 call-off Contracts Finder · CPV 73000000	Nuclear Decommissioning Authority	Amentum Clean Energy Limited	£104k	2 Nov 2026 re-tender may already be under way	North West
D&B Framework Lot 1 framework · 4 suppliers Find a Tender · CPV 35113210	UK Atomic Energy Authority	ALTRAD BABCOCK LIMITED, Amentum Clean Energy Limited, Atkins +1 more	£7.9m	4 Sep 2026 re-tender may already be under way	UK-wide
D&B Framework Lot 3: Prototype & Rig Design and Build framework · 12 suppliers Find a Tender · CPV 35113210	UK Atomic Energy Authority	3-SCI LTD, ALTRAD BABCOCK LIMITED, Amentum Clean Energy Limited +9 more	£7.9m	4 Sep 2026 re-tender may already be under way	UK-wide
D&B Framework Lot 2 Component Design, Build & System Integration framework · 12 suppliers Find a Tender · CPV 35113210	UK Atomic Energy Authority	3-SCI LTD, ALTRAD BABCOCK LIMITED, ARTNEER LIMITED +9 more	£7.9m	4 Sep 2026 re-tender may already be under way	UK-wide
D&B Framework Lot 4: Design and Build Digital & Control Systems framework · 7 suppliers Find a Tender · CPV 35113210	UK Atomic Energy Authority	ARTNEER LIMITED, Amentum Clean Energy Limited, AtkinsRéalis UK Limited +4 more	£7.9m	4 Sep 2026 re-tender may already be under way	UK-wide
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
Environmental Samples and Effluent Analysis Contracts Finder · CPV 98391000	nuclear restoration services	Amentum Clean Energy Limited	£71k	31 Mar 2026 re-tender may already be under way	Scotland
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
Peer Review Development of Disposal Container Transport Container Sub-Systems Find a Tender · CPV 79417000	International Nuclear Services Limited	Amentum Clean Energy Limited, Frazer-Nash Consultancy Ltd., NUVIA LIMITED +1 more	value not published	end date not published	UK-wide
Professional Services, Compliance & Consultancy framework · 35 suppliers Find a Tender · CPV 79993000	KBS Maritime Limited	AMENTUM CLEAN ENERGY LIMITED (prev Jacobs), ATTIS ENGINEERING LIMITED, AYESA LTD +32 more	£60.0m	end date not published	South West
Integrated Waste Management Specialist Nuclear Services Framework framework · 8 suppliers Find a Tender · CPV 71313000	Nuclear Waste Services Limited	Amentum Clean Energy Limited, Cyclife UK, Individual / sole trader (name not shown) +5 more	value not published	end date not published	UK-wide
BATS Corrosion on Carbon Steel Find a Tender · CPV 73111000	Nuclear Waste Services Limited	Amentum Clean Energy Limited	value not published	end date not published	UK-wide
Embedded Engineering Resource Framework (EERF) framework · 2 suppliers Find a Tender · CPV 71320000	United Kingdom Atomic Energy Authority	Amentum Clean Energy Limited, AtkinsRealis UK Ltd	£9.9m	end date not published	UK-wide
Post-Closure Safety Case Framework framework · 5 suppliers Find a Tender · CPV 98113100	Nuclear Waste Services Limited	Amentum Clean Energy Limited, Individual / sole trader (name not shown), Galson Sciences Limited. +2 more	value not published	end date not published	UK-wide
Lot 1 - Remediation framework · 2 suppliers Find a Tender · CPV 45000000	Sellafield Limited	A2R (Altrad Support Services Limited and AtkinsRéalis UK Limited), Amentum Clean Energy Limited	£1.6bn	end date not published	North West

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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.