AMENTUM CLEAN ENERGY LIMITED

Supplier — contracts won

£4.7bnTotal value£4,685,484,078 across every award on file

52Awardspublished since 4 July 2024

Who buys from them

Buyer	Awards	Value
Sellafield Ltd	12	£4.6bn
Nuclear Waste Services	11	£43.0m
UK Atomic Energy Authority	4	£13.5m
Defence Infrastructure Organisation	1	£4.5m
United Kingdom Atomic Energy Authority	3	£3.7m
Nuclear Restoration Services Limited (Dounreay)	5	£2.1m
Nuclear Decommissioning Authority	6	£778k
MINISTRY OF DEFENCE	1	£533k
NRS Dounreay	2	£180k
Nuclear Restoration Services Ltd	3	£105k

Every award on file

Awarded	What for	Buyer	Supplier	Value
24 Mar 2026	ATO19 D2001 LC15 Peer ReviewScotland	Nuclear Restoration Services Limited…	AMENTUM CLEAN ENERGY LIMITED	£171k
15 Jul 2025	Dounreay Cementation Plant Licence Condition Peer ReviewScotland	Nuclear Restoration Services Limited…	AMENTUM CLEAN ENERGY LIMITED	£160k
1 May 2026	DNWP0053/LOT1A/CALDER F199 DemolitionNorth West	Sellafield Ltd	AMENTUM CLEAN ENERGY LIMITED	£153k
18 Oct 2024	Fusion Futures: Uncertainty Quantification for Plasma Control Systems	United Kingdom Atomic Energy Authority	Amentum Clean Energy Ltd	£149k
17 Oct 2025	(04 - SF&NM) GK25-14	Nuclear Decommissioning Authority	AMENTUM CLEAN ENERGY LIMITED	£148k
8 Apr 2026	DNWP0011/LOT1A/ CALDER R1 Discharge Bay Service DisconnectionsNorth West	Sellafield Ltd	AMENTUM CLEAN ENERGY LIMITED	£126k
19 Jun 2025	Design of Steelwork Repairs and Ventilation ReplacementScotland	Nuclear Restoration Services Limited…	AMENTUM CLEAN ENERGY LIMITED	£112k
4 Dec 2025	(05 - SF&NM) GK25-13North West	Nuclear Decommissioning Authority	AMENTUM CLEAN ENERGY LIMITED	£104k
6 Jan 2026	DNWP Framework Digital Client LeadNorth West	Sellafield Ltd	AMENTUM CLEAN ENERGY LIMITED	£95k
27 Jan 2026	GK25-12North West	Nuclear Decommissioning Authority	AMENTUM CLEAN ENERGY LIMITED	£95k
19 May 2026	Prototype Fast Reactor Concrete Panels MethodologyScotland	NRS Dounreay	AMENTUM CLEAN ENERGY LIMITED	£94k
28 Nov 2024	GB-Harwell: UKRI-4367 Waste Characterisation ServiceSouth East	UK Research & Innovation	Amentum Clean Energy Ltd	£90k
17 Oct 2025	GK25-15 - Grand ChallengesNorth West	Nuclear Decommissioning Authority	AMENTUM CLEAN ENERGY LIMITED	£89k
17 Jan 2025	TO386 Assessment of Selective Trench RetrievalsNorth West	Nuclear Waste Services	AMENTUM CLEAN ENERGY LIMITED	£87k
17 Oct 2025	PFR Raffinate Cement TrialsScotland	NRS Dounreay	AMENTUM CLEAN ENERGY LIMITED	£86k
26 Mar 2026	DNWP0056/LOT1A/ Quaternary Borehole RestorationNorth West	Sellafield	AMENTUM CLEAN ENERGY LIMITED	£81k
14 Jan 2025	Autonomous Data Collection	United Kingdom Atomic Energy Authority	Amentum Clean Energy Limited	£76k
26 Apr 2025	Environmental Samples and Effluent Analysis	Nuclear restoration Services	Amentum Clean Energy Limited	£71k
28 Aug 2025	(04 - EDWM&R) IG25-11 - Groupwide Areas of Research Interest	Nuclear Decommissioning Authority	AMENTUM CLEAN ENERGY LIMITED	£58k
20 May 2026	CSSF-002 - GDF Criticality Safety Methodology and Assessments	Nuclear Waste Services	AMENTUM CLEAN ENERGY LIMITED +1	£40k
12 May 2025	CBRN Framework Call Off - Incident Planning Operations May & June 2025London	Defra	Amentum Clean Energy Limited	£31k
23 Oct 2024	Particle Detector Radiation TestingNorth West	NATIONAL NUCLEAR LABORATORY LIMITED	Amentum Clean Energy Ltd	£30k
17 Dec 2025	Harwell Meashill Tunnel Remediation WorksSouth East	Nuclear Restoration Services Ltd	AMENTUM CLEAN ENERGY LIMITED	£26k
1 Sep 2025	CBRN Framework Call Off - Incident Planning Operations Sept 2025London	Defra	Amentum Clean Energy Limited	£21k
3 Jun 2026	CSSF-001 - Support to international post closure criticality safety projects.	Nuclear Waste Services	AMENTUM CLEAN ENERGY LIMITED +1	£20k

Organisations are grouped by name, because the notices carry no identifier that appears on all of them. A body that publishes under two spellings will appear twice; two different companies with the same trading name will appear as one. Check the individual notices before drawing a conclusion.