Top 100 Contractors in PSC 44: Furnace/Steam/Drying; Nuclear Reactor, FY2023

Name: Top 100 Contractors in PSC 44: Furnace/Steam/Drying; Nuclear Reactor, FY2023
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2022 – Sep 30, 2023 Code page on GovTribe

The top 10 won 97% of FY2023 PSC 44 contract dollars

Contract obligations: $3,153,858,658 Net of deobligations, by contracts coded PSC 44 or a code under it
Contractors: 449 Parent companies with an obligation
Largest contractor: Fluor Corporation $1.54 billion, 48.5% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Fluor Corporation Through Fluor Marine Propulsion, LLC Top agencies Navy (Department of the Navy)	$1,541,864,820	48.5%	Rank history: #2 in FY2021, #2 in FY2022, #1 in FY2024 and #1 in FY2025; up 1 since FY2022.
2	Bechtel Corp Through Bechtel Plant Machinery, Inc. Top agencies Navy (Department of the Navy)	$1,429,547,739	45.0%	Rank history: #1 in FY2021, #1 in FY2022, #2 in FY2024 and #6 in FY2025; down 1 since FY2022.
3	General Dynamics Corporation Through Electric Boat Corporation Top agencies Navy (Department of the Navy)	$34,361,214	1.1%	Rank history: #5 in FY2021, #3 in FY2022, #4 in FY2024 and #3 in FY2025; unchanged since FY2022.
4	Centrus Energy Corp. Through American Centrifuge Operating, LLC Top agencies DOE (Department of Energy)	$33,350,000	1.0%	Rank history: not on the FY2021–FY2022 lists, #5 in FY2024 and not on the FY2025 list; new.
5	Westinghouse Electric Company LLC Through Westinghouse Government Services LLC Top agencies DOE (Department of Energy)	$15,568,775	0.5%	Rank history: #4 in FY2021, #4 in FY2022, #9 in FY2024 and not on the FY2025 list; down 1 since FY2022.
6	Huntington Ingalls Industries, Inc. Through Huntington Ingalls Inc. Top agencies Navy (Department of the Navy)	$10,209,110	0.3%	Rank history: #6 in FY2021, #7 in FY2022, #8 in FY2024 and #7 in FY2025; up 1 since FY2022.
7	Cepeda Associates, Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$6,538,898	0.2%	Rank history: #12 in FY2021, #6 in FY2022, #7 in FY2024 and #9 in FY2025; down 1 since FY2022.
8	O.C. Lugo Co. Inc. the Top agencies DLA (Defense Logistics Agency)	$5,905,127	0.2%	Rank history: #10 in FY2021, #35 in FY2022, #10 in FY2024 and #5 in FY2025; up 27 since FY2022.
9	Aptim Federal Services LLC Top agencies Navy (Department of the Navy)	$4,592,829	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
10	Molecular Products Inc Top agencies DLA (Defense Logistics Agency)	$3,408,900	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
11	Westinghouse Air Brake Technologies Corp Through Wabtec Components LLC Top agencies Navy (Department of the Navy)	$3,349,600	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
12	Argo Turboserve Corporation Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$2,575,588	0.1%	Rank history: #18 in FY2021, #20 in FY2022, #17 in FY2024 and #15 in FY2025; up 8 since FY2022.
13	Aqua-Chem, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$2,387,818	0.1%	Rank history: #13 in FY2021, #9 in FY2022, #15 in FY2024 and #13 in FY2025; down 4 since FY2022.
14	Sistersville Tank Works Inc. Top agencies USAF (Department of the Air Force)	$2,332,611	0.1%	Rank history: not on the FY2021–FY2022 lists, #13 in FY2024 and not on the FY2025 list; new.
15	RTX Corporation 4 awardees, including Hamilton Sundstrand Corporation and Raytheon Company Top agencies Navy (Department of the Navy)	$2,303,977	0.1%	Rank history: #7 in FY2021, #8 in FY2022 and not on the FY2024–FY2025 lists; down 7 since FY2022.
16	Triman Industries Inc. 2 awardees, including Brighton Cromwell LLC Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$1,894,911	0.1%	Rank history: #39 in FY2021, #61 in FY2022, #26 in FY2024 and #29 in FY2025; up 45 since FY2022.
17	Esco Technologies Inc. Through Vacco Industries Top agencies Navy (Department of the Navy)	$1,880,605	0.1%	Rank history: #22 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
18	Bhayana Brothers LLC Top agencies Navy (Department of the Navy)	$1,827,930	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 87 since FY2022.
19	Technical Applications Inc. Top agencies Treasury (Department of the Treasury)	$1,666,628	0.1%	Rank history: not on the FY2021 list, #21 in FY2022 and not on the FY2024–FY2025 lists; up 2 since FY2022.
20	S I T Corporation Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$1,356,490	<0.1%	Rank history: #21 in FY2021, #66 in FY2022, #23 in FY2024 and #78 in FY2025; up 46 since FY2022.
21	Phoenix Trading Inc. Top agencies DLA (Defense Logistics Agency)	$1,210,963	<0.1%	Rank history: #31 in FY2021, #43 in FY2022, #21 in FY2024 and #22 in FY2025; up 22 since FY2022.
22	Western Michigan Fleet Parts Inc. Top agencies DLA (Defense Logistics Agency)	$1,192,234	<0.1%	Rank history: #56 in FY2021, not on the FY2022 list, #29 in FY2024 and not on the FY2025 list; up 145 since FY2022.
23	Red Point Construction LLC Top agencies Commerce (Department of Commerce)	$976,800	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
24	Caliber Sales Engineering Inc. Top agencies USAF (Department of the Air Force)	$930,060	<0.1%	Rank history: not on the FY2021 list, #12 in FY2022 and not on the FY2024–FY2025 lists; down 12 since FY2022.
25	Hunter Defense Technolog Through HDT Expeditionary Systems Inc. Top agencies Army (Department of the Army)	$922,752	<0.1%	Rank history: #26 in FY2021, #18 in FY2022 and not on the FY2024–FY2025 lists; down 7 since FY2022.
26	Genuine Parts Company Through Motion Industries, Inc. Top agencies Navy (Department of the Navy)	$911,536	<0.1%	Rank history: #36 in FY2021, #26 in FY2022 and not on the FY2024–FY2025 lists; unchanged since FY2022.
27	Howell Laboratories Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$896,447	<0.1%	Rank history: #24 in FY2021, #32 in FY2022, #57 in FY2024 and #20 in FY2025; up 5 since FY2022.
28	Jgils, LLC Top agencies DLA (Defense Logistics Agency)	$894,181	<0.1%	Rank history: #28 in FY2021, #42 in FY2022, #22 in FY2024 and #12 in FY2025; up 14 since FY2022.
29	Allied Defense Industries Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$845,777	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 95 since FY2022.
30	Danaher Corporation Through Pall Aeropower Corporation Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$841,286	<0.1%	Rank history: #61 in FY2021, #47 in FY2022, #75 in FY2024 and not on the FY2025 list; up 17 since FY2022.
31	Fad Pennsylvania Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$792,156	<0.1%	Rank history: #20 in FY2021, #17 in FY2022 and not on the FY2024–FY2025 lists; down 14 since FY2022.
32	Frham Safety Products, LLC Top agencies Navy (Department of the Navy)	$701,452	<0.1%	Rank history: not on the FY2021–FY2022 lists, #50 in FY2024 and #16 in FY2025; up 173 since FY2022.
33	Pauley Rodine Inc. Top agencies Navy (Department of the Navy)	$698,527	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
34	Export 220Volt Inc. Top agencies DOS (Department of State)	$658,182	<0.1%	Rank history: #50 in FY2021, #15 in FY2022, #20 in FY2024 and #32 in FY2025; down 19 since FY2022.
35	International Support Group LLC Top agencies DHS (Department of Homeland Security)	$648,863	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 204 since FY2022.
36	Bollinger Shipyards Inc Through Chand, L.L.C. Top agencies DLA (Defense Logistics Agency)	$632,613	<0.1%	Rank history: #15 in FY2021, #50 in FY2022 and not on the FY2024–FY2025 lists; up 14 since FY2022.
37	KAM Thermal Equipment, Ltd. Top agencies DHS (Department of Homeland Security)	$621,250	<0.1%	Rank history: #86 in FY2021, not on the FY2022 list, #80 in FY2024 and #91 in FY2025; returned.
38	NBT Construction and Supply, LLC Top agencies DOJ (Department of Justice)	$607,260	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
39	Sanford Federal, Inc. Top agencies USAF (Department of the Air Force)	$593,711	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
40	All State Construction Inc. Top agencies DOJ (Department of Justice)	$582,357	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 178 since FY2022.
41	Burhani Enterprises Inc. Top agencies DLA (Defense Logistics Agency) VA (Department of Veterans Affairs) DOI (Department of the Interior)	$504,429	<0.1%	Rank history: not on the FY2021 list, #78 in FY2022, not on the FY2024 list and #44 in FY2025; up 37 since FY2022.
42	Drytech Inc. Top agencies DLA (Defense Logistics Agency)	$488,907	<0.1%	Rank history: #35 in FY2021, #23 in FY2022, #36 in FY2024 and #40 in FY2025; down 19 since FY2022.
43	Graham Corp Top agencies Navy (Department of the Navy)	$482,593	<0.1%	Rank history: not on the FY2021 list, #53 in FY2022, #74 in FY2024 and #19 in FY2025; up 10 since FY2022.
44	Xylem Inc. Through Fluid Handling LLC Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security) Navy (Department of the Navy)	$481,049	<0.1%	Rank history: #8 in FY2021, #13 in FY2022 and not on the FY2024–FY2025 lists; down 31 since FY2022.
45	Dutch Valley Supply Co. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$467,386	<0.1%	Rank history: #70 in FY2021, #76 in FY2022, not on the FY2024 list and #93 in FY2025; up 31 since FY2022.
46	Technology International Inc. Top agencies USDA (Department of Agriculture) HHS (Department of Health and Human Services)	$465,852	<0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #75 in FY2025; new.
47	Georgia Thermal Products LLC Top agencies NASA (National Aeronautics and Space Administration)	$462,400	<0.1%	Rank history: not on the FY2021–FY2022 lists, #53 in FY2024 and not on the FY2025 list; new.
48	K5 Defense LLC Top agencies DLA (Defense Logistics Agency) USDA (Department of Agriculture) Navy (Department of the Navy)	$448,003	<0.1%	Rank history: not on the FY2021–FY2022 lists, #44 in FY2024 and not on the FY2025 list; up 201 since FY2022.
49	K2 Contracting Group, LLC Top agencies DOT (Department of Transportation)	$438,272	<0.1%	Rank history: not on the FY2021 list, #16 in FY2022 and not on the FY2024–FY2025 lists; down 33 since FY2022.
50	Industrial Heat Transfer, Inc. Top agencies Army (Department of the Army)	$425,232	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
51	Star Brass Foundry and Refining Company Top agencies Army (Department of the Army)	$424,724	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
52	AQW Inc. Top agencies DLA (Defense Logistics Agency)	$421,177	<0.1%	Rank history: #43 in FY2021, #45 in FY2022, #58 in FY2024 and #46 in FY2025; down 7 since FY2022.
53	Derrah Morrison Enterprises LLC Top agencies VA (Department of Veterans Affairs)	$369,982	<0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #64 in FY2025; new.
54	Gadsden Industrial Distributors, Inc. Top agencies Army (Department of the Army)	$357,192	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 300 since FY2022.
55	Mooweep LLC Top agencies DOI (Department of the Interior)	$345,200	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
56	Wren Industries LLC Top agencies Army (Department of the Army)	$344,740	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
57	Lektron Inc. Top agencies Army (Department of the Army)	$339,485	<0.1%	Rank history: not on the FY2021–FY2022 lists, #24 in FY2024 and not on the FY2025 list; new.
58	Dela Technology Corporation Top agencies DLA (Defense Logistics Agency)	$333,300	<0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #67 in FY2025; new.
59	ECI Defense Group, Inc. 2 awardees Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$325,282	<0.1%	Rank history: not on the FY2021–FY2022 lists, #16 in FY2024 and #8 in FY2025; up 257 since FY2022.
60	Pioneer Industries, LLC Top agencies DLA (Defense Logistics Agency)	$322,897	<0.1%	Rank history: #40 in FY2021, #31 in FY2022, #40 in FY2024 and #28 in FY2025; down 29 since FY2022.
61	Government of the United States 3 awardees, including Federal Prison Industries, Inc. Top agencies VA (Department of Veterans Affairs) USDA (Department of Agriculture) DHA (Defense Health Agency)	$318,048	<0.1%	Rank history: #73 in FY2021, #52 in FY2022, #42 in FY2024 and #36 in FY2025; down 9 since FY2022.
62	Dinamec Systems, LLC Top agencies Navy (Department of the Navy)	$317,840	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
63	Glosfume Limited Top agencies Navy (Department of the Navy)	$317,835	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
64	Dibert Valve and Fitting Company, Incorporated 2 awardees Top agencies Navy (Department of the Navy)	$317,152	<0.1%	Rank history: #29 in FY2021, #33 in FY2022 and not on the FY2024–FY2025 lists; down 31 since FY2022.
65	Horizon Solution Company Top agencies DLA (Defense Logistics Agency)	$315,600	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
66	Megabite Electronics, Inc. Top agencies DLA (Defense Logistics Agency)	$314,175	<0.1%	Rank history: #37 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 37 since FY2022.
67	Painter Tool Incorporated Top agencies Navy (Department of the Navy)	$312,596	<0.1%	Rank history: #34 in FY2021, #37 in FY2022 and not on the FY2024–FY2025 lists; down 30 since FY2022.
68	Phoenix Systems Engineering Inc. Top agencies DLA (Defense Logistics Agency)	$305,718	<0.1%	Rank history: #32 in FY2021, #87 in FY2022, #37 in FY2024 and #37 in FY2025; up 19 since FY2022.
69	Gill Group Inc. Top agencies DOJ (Department of Justice)	$301,560	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
70	Seco/Warwick Corporation Top agencies Treasury (Department of the Treasury)	$296,100	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
71	Vapor Power International, LLC Top agencies Navy (Department of the Navy)	$295,118	<0.1%	Rank history: not on the FY2021 list, #41 in FY2022 and not on the FY2024–FY2025 lists; down 30 since FY2022.
72	Pines Quality Inc. Top agencies DLA (Defense Logistics Agency)	$289,128	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
73	Munters Corporation Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force) VA (Department of Veterans Affairs)	$284,871	<0.1%	Rank history: #9 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
74	Wisecom Technologies Inc. Top agencies Army (Department of the Army) DHS (Department of Homeland Security)	$278,661	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 181 since FY2022.
75	Boone & Boone Sales Co., Inc. Top agencies Army (Department of the Army)	$274,845	<0.1%	Rank history: #82 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
76	Thrustmaster of Texas, Inc. Top agencies DLA (Defense Logistics Agency)	$267,832	<0.1%	Rank history: not on the FY2021–FY2022 lists, #93 in FY2024 and not on the FY2025 list; new.
77	Martin Military Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$250,224	<0.1%	Rank history: #93 in FY2021, not on the FY2022 list, #49 in FY2024 and not on the FY2025 list; up 184 since FY2022.
78	RIX Industries Top agencies DLA (Defense Logistics Agency)	$247,884	<0.1%	Rank history: not on the FY2021 list, #71 in FY2022 and not on the FY2024–FY2025 lists; down 7 since FY2022.
79	Thermco Systems Limited Top agencies Navy (Department of the Navy)	$247,000	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
80	Xchanger Manufacturing Corporation Top agencies DLA (Defense Logistics Agency)	$242,225	<0.1%	Rank history: #33 in FY2021, #49 in FY2022 and not on the FY2024–FY2025 lists; down 31 since FY2022.
81	Houston Boiler Works, LLC Top agencies DOJ (Department of Justice)	$240,000	<0.1%	Rank history: not on the FY2021–FY2022 lists, #76 in FY2024 and not on the FY2025 list; new.
82	Machine Tool Marketing Inc Top agencies DHS (Department of Homeland Security)	$238,907	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
83	Power Mechanical Inc. Top agencies DLA (Defense Logistics Agency)	$237,500	<0.1%	Rank history: not on the FY2021–FY2022 lists, #38 in FY2024 and #100 in FY2025; up 344 since FY2022.
84	AGM Container Controls Inc. Top agencies DLA (Defense Logistics Agency)	$229,818	<0.1%	Rank history: not on the FY2021–FY2022 lists, #60 in FY2024 and #62 in FY2025; up 34 since FY2022.
85	R & M Government Services Inc. Top agencies DLA (Defense Logistics Agency)	$227,057	<0.1%	Rank history: not on the FY2021–FY2022 lists, #47 in FY2024 and #94 in FY2025; new.
86	All-Safe Inc. Top agencies DLA (Defense Logistics Agency)	$224,718	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 252 since FY2022.
87	CMI Management, LLC Top agencies GSA (General Services Administration)	$222,506	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
88	Walter Mechanical Services Inc. Top agencies DOT (Department of Transportation)	$214,325	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
89	Sycamore Capital, LLC Top agencies DHS (Department of Homeland Security) Army (Department of the Army)	$213,070	<0.1%	Rank history: not on the FY2021–FY2022 lists, #46 in FY2024 and not on the FY2025 list; new.
90	TNL Sales LLC Top agencies DLA (Defense Logistics Agency)	$210,092	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 196 since FY2022.
91	Cummins-Wagner Company, Inc. Top agencies DHS (Department of Homeland Security)	$208,292	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 140 since FY2022.
92	General Nuclear Corp Top agencies Navy (Department of the Navy)	$203,822	<0.1%	Rank history: #76 in FY2021, #89 in FY2022 and not on the FY2024–FY2025 lists; down 3 since FY2022.
93	Brown Point Facility Management Solutions, LLC Top agencies DOJ (Department of Justice)	$197,633	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 50 since FY2022.
94	K2 Manufacturing, Inc. Top agencies Navy (Department of the Navy)	$195,114	<0.1%	Rank history: not on the FY2021 list, #38 in FY2022 and not on the FY2024–FY2025 lists; down 56 since FY2022.
95	Writax Distribution Private Limited Top agencies DOS (Department of State)	$182,500	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
96	Wrigglesworth Enterprises Inc. Top agencies DHA (Defense Health Agency) USDA (Department of Agriculture)	$180,944	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 244 since FY2022.
97	Onesource Europe GMBH Top agencies Army (Department of the Army)	$173,969	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
98	General Aire Systems, Inc. Top agencies Navy (Department of the Navy)	$173,164	<0.1%	Rank history: not on the FY2021 list, #77 in FY2022 and not on the FY2024–FY2025 lists; down 21 since FY2022.
99	Ruta Supplies Inc. Top agencies DLA (Defense Logistics Agency)	$166,123	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
100	TECH Service Solutions LLC Top agencies DOI (Department of the Interior) USAF (Department of the Air Force) Army (Department of the Army)	$163,856	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 46 since FY2022.

Show 75 more

100 of 449 contractors listed here. See the rest on GovTribe.

Rankings for the codes under PSC 44

Code	Net obligations	Largest contractor
4470 Nuclear Reactors	$3,075,423,319	Fluor Corporation
4460 Air Purification Equipment	$27,036,457	Cepeda Associates, Inc.
4420 Heat Exchangers and Steam Condensers	$20,463,438	Westinghouse Air Brake Technologies Corp
4440 Driers, Dehydrators, and Anhydrators	$13,444,574	Argo Turboserve Corporation
4410 Industrial Boilers	$11,355,760	Bhayana Brothers LLC
4430 Industrial Furnaces, Kilns, Lehrs, and Ovens	$6,135,110	Technical Applications Inc.

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 $3.18 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 2023 ran Oct 1, 2022 – Sep 30, 2023. 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 FY2022. "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 FY2022 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.

Quick answers

Who were the top 10 PSC 44 contractors in FY2023?

1. Fluor Corporation ($1.54B), 2. Bechtel Corp ($1.43B), 3. General Dynamics Corporation ($34.4M), 4. Centrus Energy Corp. ($33.4M), 5. Westinghouse Electric Company LLC ($15.6M), 6. Huntington Ingalls Industries, Inc. ($10.2M), 7. Cepeda Associates, Inc. ($6.54M), 8. O.C. Lugo Co. Inc. the ($5.91M), 9. Aptim Federal Services LLC ($4.59M), 10. Molecular Products Inc ($3.41M).

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