Top 50 Contractors in PSC 4470: Nuclear Reactors, FY2025

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Fluor Corporation Through Fluor Marine Propulsion, LLC Top agencies Navy (Department of the Navy)	$1,826,756,855	82.1%	Rank history: #2 in FY2021, #2 in FY2022, #1 in FY2023 and #1 in FY2024; unchanged since FY2024.
2	American Centrifuge Operating, LLC Top agencies DOE (Department of Energy)	$197,816,150	8.9%	Rank history: not on the FY2021–FY2023 lists and #3 in FY2024; up 1 since FY2024.
3	General Dynamics Corporation Through Electric Boat Corporation Top agencies Navy (Department of the Navy)	$37,823,510	1.7%	Rank history: #4 in FY2021, #3 in FY2022, #3 in FY2023 and #4 in FY2024; up 1 since FY2024.
4	Westinghouse Government Services LLC Top agencies DOE (Department of Energy)	$24,965,577	1.1%	Rank history: not on the FY2021–FY2023 lists and #9 in FY2024; up 5 since FY2024.
5	Bechtel Corp Through Bechtel Plant Machinery, Inc. Top agencies Navy (Department of the Navy)	$10,703,268	0.5%	Rank history: #1 in FY2021, #1 in FY2022, #2 in FY2023 and #2 in FY2024; down 3 since FY2024.
6	Huntington Ingalls Industries, Inc. Through Huntington Ingalls Inc. Top agencies Navy (Department of the Navy)	$9,797,588	0.4%	Rank history: #5 in FY2021, #5 in FY2022, #6 in FY2023 and #7 in FY2024; up 1 since FY2024.
7	Frham Safety Products LLC Top agencies Navy (Department of the Navy)	$2,147,614	0.1%	Rank history: not on the FY2021 list, #31 in FY2022, #10 in FY2023 and #12 in FY2024; up 5 since FY2024.
8	Hamill Manufacturing Company Top agencies Navy (Department of the Navy)	$1,225,360	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
9	Zeno Power Systems Inc. Top agencies OSD (Office of the Secretary of Defense)	$831,000	<0.1%	Rank history: not on the FY2021–FY2023 lists and #6 in FY2024; down 3 since FY2024.
10	Skovira Machine Co Top agencies Navy (Department of the Navy)	$656,230	<0.1%	Rank history: #28 in FY2021, #20 in FY2022, #21 in FY2023 and #23 in FY2024; up 13 since FY2024.
11	Peerless Instrument Co., Inc. Top agencies Navy (Department of the Navy)	$531,962	<0.1%	Rank history: #41 in FY2021, not on the FY2022–FY2023 lists and #10 in FY2024; down 1 since FY2024.
12	Hyspan Precision Products, Inc. Top agencies Navy (Department of the Navy)	$394,812	<0.1%	Rank history: not on the FY2021 list, #15 in FY2022 and not on the FY2023–FY2024 lists; returned.
13	Corestar International Corporation Top agencies Navy (Department of the Navy)	$276,696	<0.1%	Rank history: #23 in FY2021, #29 in FY2022, not on the FY2023 list and #21 in FY2024; up 8 since FY2024.
14	Diazyme Laboratories Inc. Through General Atomics Top agencies USUHS (DOD Uniformed Services University of the Health Sciences)	$209,401	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
15	Waltron Bull & Roberts, LLC Top agencies Navy (Department of the Navy)	$196,050	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
16	Rich Industries Inc. Top agencies Navy (Department of the Navy)	$156,878	<0.1%	Rank history: #25 in FY2021, #25 in FY2022, #19 in FY2023 and #13 in FY2024; down 3 since FY2024.
17	General Nuclear Corp Top agencies Navy (Department of the Navy)	$148,512	<0.1%	Rank history: not on the FY2021–FY2023 lists and #14 in FY2024; down 3 since FY2024.
18	Dibert Valve and Fitting Company, Incorporated Top agencies Navy (Department of the Navy)	$146,986	<0.1%	Rank history: #10 in FY2021, #10 in FY2022, #11 in FY2023 and #28 in FY2024; up 10 since FY2024.
19	Fluidyne Corporation Top agencies Navy (Department of the Navy)	$145,351	<0.1%	Rank history: #17 in FY2021, #17 in FY2022, #28 in FY2023 and #15 in FY2024; down 4 since FY2024.
20	Leonardo S.p.A. Through DRS Naval Power Systems Inc. Top agencies Navy (Department of the Navy)	$140,884	<0.1%	Rank history: #40 in FY2021, #35 in FY2022, not on the FY2023 list and #36 in FY2024; up 16 since FY2024.
21	U.s.a. Spares Inc. Top agencies Navy (Department of the Navy)	$129,400	<0.1%	Rank history: #19 in FY2021, #22 in FY2022, #18 in FY2023 and #26 in FY2024; up 5 since FY2024.
22	Creative Logistics Ltd Top agencies Navy (Department of the Navy)	$110,025	<0.1%	Rank history: not on the FY2021 list, #28 in FY2022, #43 in FY2023 and not on the FY2024 list; returned.
23	In Speck Corp Top agencies Navy (Department of the Navy)	$79,859	<0.1%	Rank history: #20 in FY2021, #32 in FY2022, #23 in FY2023 and #33 in FY2024; up 10 since FY2024.
24	Painter Tool Incorporated Top agencies Navy (Department of the Navy)	$77,798	<0.1%	Rank history: #11 in FY2021, #11 in FY2022, #12 in FY2023 and #20 in FY2024; down 4 since FY2024.
25	Adirondack Electronics Inc. Top agencies Navy (Department of the Navy)	$77,545	<0.1%	Rank history: #14 in FY2021, #19 in FY2022, #25 in FY2023 and #17 in FY2024; down 8 since FY2024.
26	Kampi Components Co Inc. Top agencies Navy (Department of the Navy)	$55,566	<0.1%	Rank history: #22 in FY2021, not on the FY2022 list, #27 in FY2023 and #18 in FY2024; down 8 since FY2024.
27	Draftco LLC Top agencies Navy (Department of the Navy)	$54,000	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
28	Mirion Technologies (CAPINTEC) Inc. Through Mirion Technologies (Ist) Corporation Top agencies Navy (Department of the Navy)	$52,084	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
29	Marine Electric Systems Inc. Top agencies Navy (Department of the Navy)	$46,311	<0.1%	Rank history: #18 in FY2021, #9 in FY2022, #22 in FY2023 and #27 in FY2024; down 2 since FY2024.
30	Norcatec LLC Top agencies Navy (Department of the Navy)	$35,818	<0.1%	Rank history: not on the FY2021–FY2022 lists, #17 in FY2023 and #24 in FY2024; down 6 since FY2024.
31	A.M.S. Network LLC Top agencies Navy (Department of the Navy)	$35,624	<0.1%	Rank history: not on the FY2021–FY2023 lists and #37 in FY2024; up 6 since FY2024.
32	Greater Maryland Tool & Mfg. Corp. Top agencies Navy (Department of the Navy)	$34,015	<0.1%	Rank history: #34 in FY2021, #26 in FY2022, #16 in FY2023 and #44 in FY2024; up 12 since FY2024.
33	BEC Systems LLC Top agencies Navy (Department of the Navy)	$27,753	<0.1%	Rank history: #37 in FY2021, #23 in FY2022 and not on the FY2023–FY2024 lists; returned.
34	ECI Defense Group, Inc. Top agencies Navy (Department of the Navy)	$25,574	<0.1%	Rank history: not on the FY2021 list, #42 in FY2022, not on the FY2023 list and #34 in FY2024; unchanged since FY2024.
35	Armil / Cfs, Inc. Top agencies Navy (Department of the Navy)	$25,200	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
36	Indal Technologies Inc Through EST Group Inc. Top agencies Navy (Department of the Navy)	$24,255	<0.1%	Rank history: not on the FY2021–FY2023 lists and #38 in FY2024; up 2 since FY2024.
37	Fluid Conditioning Products, Inc. Top agencies Navy (Department of the Navy)	$23,800	<0.1%	Rank history: not on the FY2021 list, #48 in FY2022 and not on the FY2023–FY2024 lists; returned.
38	Lockheed Martin Corporation Top agencies Navy (Department of the Navy)	$17,035	<0.1%	Rank history: not on the FY2021 list, #30 in FY2022, not on the FY2023 list and #25 in FY2024; down 13 since FY2024.
39	Hansome Energy Systems Inc. Top agencies Navy (Department of the Navy)	$9,924	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
40	Par Defense Industries, LLC Top agencies Navy (Department of the Navy)	$9,108	<0.1%	Rank history: not on the FY2021–FY2023 lists and #22 in FY2024; down 18 since FY2024.
41	Stag Enterprise, Inc. Top agencies Navy (Department of the Navy)	$8,979	<0.1%	Rank history: not on the FY2021 list, #56 in FY2022 and not on the FY2023–FY2024 lists; returned.
42	Gaffel Equipment Top agencies Navy (Department of the Navy)	$8,707	<0.1%	Rank history: #42 in FY2021, #38 in FY2022, #38 in FY2023 and #35 in FY2024; down 7 since FY2024.
43	Weckworth Manufacturing, Inc. Top agencies Navy (Department of the Navy)	$7,824	<0.1%	Rank history: #32 in FY2021, #47 in FY2022, not on the FY2023 list and #32 in FY2024; down 11 since FY2024.
44	Griswold Industries Top agencies Navy (Department of the Navy)	$5,603	<0.1%	Rank history: #44 in FY2021, #57 in FY2022, #40 in FY2023 and not on the FY2024 list; returned.
45	Sealing Specialists & Service Co Top agencies Navy (Department of the Navy)	$4,591	<0.1%	Rank history: #47 in FY2021, #51 in FY2022, #45 in FY2023 and #41 in FY2024; down 4 since FY2024.
46	Flowserve Corporation Top agencies Navy (Department of the Navy)	$3,500	<0.1%	Rank history: not on the FY2021–FY2022 lists, #35 in FY2023 and not on the FY2024 list; returned.
47	Daniels Manufacturing Corporation Top agencies Navy (Department of the Navy)	$1,897	<0.1%	Rank history: #45 in FY2021, #50 in FY2022, #31 in FY2023 and #40 in FY2024; down 7 since FY2024.
48	Basic Rubber and Plastics Co. Top agencies Navy (Department of the Navy)	$1,684	<0.1%	Rank history: #43 in FY2021, not on the FY2022–FY2023 lists and #43 in FY2024; down 5 since FY2024.
49	Container Research Corp Top agencies Navy (Department of the Navy)	$1,528	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
50	Era Industrial Sales Corp Top agencies DLA (Defense Logistics Agency)	$118	<0.1%	Rank history: #48 in FY2021 and not on the FY2022–FY2024 lists; returned.

How this ranking works

• Source: every contract action FPDS records (as published on SAM.gov) in the period, as GovTribe received it.
• Amounts are net obligations: what was obligated, less what was deobligated. Shares are of $2.23 billion obligated before deobligations, so they never pass 100%.
• Parent companies: each action counts under the ultimate parent its award record names, or under the awardee when it names none, so no dollar counts twice. Parents of the same name (Inc., LLC and the like aside) count as one company, since FPDS records a company's parent under more than one UEI over time. GovTribe corrects a few parents and names by hand; see the corrections.
• Fiscal year 2025 ran Oct 1, 2024 – Sep 30, 2025. The Department of Defense reports its contract actions to FPDS about 90 days late, so a fiscal year is ranked once they're in, in February, and the list doesn't change after.
• Rank changes compare with FY2024. "New" marks a company outside that period's top 500, and "Returned" one of those that was on an earlier fiscal year's list.
• Rank lines show each company's rank on every fiscal year's list since FY2021, #1 at the top, on a scale that gives the top of the list more room. A dashed stretch spans years it wasn't on the list. The step from FY2024 takes the color of the rank change beside it.
• Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

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