Top 100 Contractors in NAICS 3324: Boiler, Tank, and Shipping Container Manufacturing, FY2025

Name: Top 100 Contractors in NAICS 3324: Boiler, Tank, and Shipping Container Manufacturing, FY2025
Creator: GovTribe
License: https://creativecommons.org/licenses/by/4.0/

Parent companies by net contract obligations Oct 1, 2024 – Sep 30, 2025 Code page on GovTribe

The top 10 won 89% of FY2025 NAICS 3324 contract dollars

Contract obligations: $2,535,667,905 Net of deobligations, by contracts coded NAICS 3324 or a code under it
Contractors: 664 Parent companies with an obligation
Largest contractor: Bechtel Corp $2.14 billion, 79.6% of obligations
Data as of: Oct 23, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV · Free to reuse with credit to GovTribe (CC BY 4.0)

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Bechtel Corp Through Bechtel Plant Machinery, Inc. Top agencies Navy (Department of the Navy)	$2,141,497,055	79.6%	Rank history: #1 in FY2021, #1 in FY2022, #1 in FY2023 and #1 in FY2024; unchanged since FY2024.
2	Conco, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$131,424,754	4.9%	Rank history: #22 in FY2021, #4 in FY2022, #2 in FY2023 and #2 in FY2024; unchanged since FY2024.
3	BOH Environmental L.L.C. 2 awardees Top agencies DLA (Defense Logistics Agency) Army (Department of the Army)	$37,231,241	1.4%	Rank history: #3 in FY2021, #3 in FY2022, #3 in FY2023 and #3 in FY2024; unchanged since FY2024.
4	AAR Manufacturing, Inc. Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security) Army (Department of the Army)	$15,472,107	0.6%	Rank history: #88 in FY2021, not on the FY2022–FY2023 lists and #7 in FY2024; up 3 since FY2024.
5	Isometrics Inc. Top agencies Army (Department of the Army)	$13,645,091	0.5%	Rank history: #9 in FY2021, not on the FY2022–FY2023 lists and #10 in FY2024; up 5 since FY2024.
6	Contract Industrial Tooling Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$13,154,946	0.5%	Rank history: not on the FY2021–FY2022 lists, #27 in FY2023 and #70 in FY2024; up 64 since FY2024.
7	Brooks & Perkins, Inc. Top agencies Navy (Department of the Navy)	$10,953,726	0.4%	Rank history: #39 in FY2021, #9 in FY2022, #9 in FY2023 and #13 in FY2024; up 6 since FY2024.
8	Atlantic Diving Supply, Inc. Top agencies USAF (Department of the Air Force) DLA (Defense Logistics Agency) Navy (Department of the Navy)	$10,912,569	0.4%	Rank history: not on the FY2021–FY2023 lists and #6 in FY2024; down 2 since FY2024.
9	Huntington Ingalls Industries, Inc. Through Huntington Ingalls Inc. Top agencies Navy (Department of the Navy)	$9,797,588	0.4%	Rank history: #7 in FY2021, #7 in FY2022, #8 in FY2023 and #8 in FY2024; down 1 since FY2024.
10	Sharkcage Inc. Top agencies DLA (Defense Logistics Agency) Army (Department of the Army)	$9,421,137	0.4%	Rank history: #17 in FY2021, #10 in FY2022, #6 in FY2023 and #11 in FY2024; up 1 since FY2024.
11	W&K Container, Inc. Top agencies DLA (Defense Logistics Agency)	$9,166,225	0.3%	Rank history: #8 in FY2021, #14 in FY2022, #13 in FY2023 and #9 in FY2024; down 2 since FY2024.
12	Sea Box Inc. 2 awardees Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force) Army (Department of the Army)	$8,571,853	0.3%	Rank history: #5 in FY2021, #6 in FY2022, #4 in FY2023 and #4 in FY2024; down 8 since FY2024.
13	ECI Defense Group, Inc. 2 awardees Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force)	$8,270,254	0.3%	Rank history: not on the FY2021–FY2023 lists and #19 in FY2024; up 6 since FY2024.
14	Container Research Corp Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency) Army (Department of the Army)	$7,445,050	0.3%	Rank history: not on the FY2021–FY2022 lists, #10 in FY2023 and #36 in FY2024; up 22 since FY2024.
15	Intrepid Eagle Logistics, Inc. Top agencies DLA (Defense Logistics Agency)	$4,542,327	0.2%	Rank history: #25 in FY2021, #27 in FY2022, #44 in FY2023 and #5 in FY2024; down 10 since FY2024.
16	Jgils, LLC Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$3,789,264	0.1%	Rank history: #37 in FY2021, #64 in FY2022, #38 in FY2023 and #30 in FY2024; up 14 since FY2024.
17	Solutions Ftg, Inc. Top agencies DLA (Defense Logistics Agency)	$3,589,765	0.1%	Rank history: not on the FY2021 list, #22 in FY2022, #18 in FY2023 and #15 in FY2024; down 2 since FY2024.
18	The Albers Group LLC Through Advanced Packaging LLC Top agencies Navy (Department of the Navy)	$3,520,730	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
19	Pelican Products, Inc. 3 awardees, including Hardigg Industries, LLC and Peli Biothermal New Mexico, LLC Top agencies Navy (Department of the Navy) HHS (Department of Health and Human Services) DLA (Defense Logistics Agency)	$3,233,119	0.1%	Rank history: #42 in FY2021, #60 in FY2022, #35 in FY2023 and not on the FY2024 list; up 112 since FY2024.
20	Alfa Laval U.S. Holding Inc. 3 awardees, including Tranter Inc. and Alfa Laval Inc. Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security)	$2,931,182	0.1%	Rank history: not on the FY2021–FY2024 lists; up 338 since FY2024.
21	Aqua-Chem, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) DHS (Department of Homeland Security)	$2,855,063	0.1%	Rank history: #40 in FY2021, #21 in FY2022, #26 in FY2023 and #27 in FY2024; up 6 since FY2024.
22	Nexgen Composites LLC Top agencies DLA (Defense Logistics Agency) Army (Department of the Army)	$2,772,321	0.1%	Rank history: #16 in FY2021, #11 in FY2022, #29 in FY2023 and #17 in FY2024; down 5 since FY2024.
23	Armor Metal Group Mason, Inc. Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$2,205,457	0.1%	Rank history: not on the FY2021–FY2023 lists and #14 in FY2024; down 9 since FY2024.
24	Heico Corp 5 awardees, including Capewell Aerial Systems LLC, Pioneer Industries, LLC and Seal Dynamics LLC Top agencies DLA (Defense Logistics Agency)	$2,169,920	0.1%	Rank history: not on the FY2021–FY2024 lists; up 409 since FY2024.
25	Erie Engineered Products, Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$1,850,292	0.1%	Rank history: #12 in FY2021, not on the FY2022 list, #17 in FY2023 and not on the FY2024 list; up 149 since FY2024.
26	Airgo Industries, Inc. Top agencies DLA (Defense Logistics Agency)	$1,787,772	0.1%	Rank history: not on the FY2021 list, #94 in FY2022, #57 in FY2023 and #21 in FY2024; down 5 since FY2024.
27	Greene Machine & Manufacturing Inc. Top agencies USAF (Department of the Air Force)	$1,741,566	0.1%	Rank history: #31 in FY2021, #42 in FY2022, #22 in FY2023 and #22 in FY2024; down 5 since FY2024.
28	Jaxon Engineering and Maintenance LLC Top agencies Army (Department of the Army)	$1,683,599	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
29	Graham Corp Top agencies Navy (Department of the Navy)	$1,664,270	0.1%	Rank history: not on the FY2021 list, #69 in FY2022, #64 in FY2023 and #96 in FY2024; up 67 since FY2024.
30	Integrated Procurement Technologies Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$1,563,863	0.1%	Rank history: #65 in FY2021 and not on the FY2022–FY2024 lists; returned.
31	Secure Western Storage Inc. Top agencies Army (Department of the Army)	$1,504,725	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
32	Terry Service, Inc. Top agencies Army (Department of the Army)	$1,387,381	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
33	Garrett Container Systems, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$1,260,207	<0.1%	Rank history: #19 in FY2021, #24 in FY2022, #11 in FY2023 and #25 in FY2024; down 8 since FY2024.
34	Northrop Grumman Systems Corporation 4 awardees Top agencies Navy (Department of the Navy)	$1,225,824	<0.1%	Rank history: #51 in FY2021, not on the FY2022 list, #25 in FY2023 and not on the FY2024 list; up 187 since FY2024.
35	Mountain Horse LLC Top agencies Army (Department of the Army)	$1,057,232	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
36	Rgas LLC Top agencies DLA (Defense Logistics Agency)	$1,050,000	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
37	AC Inc. Top agencies Navy (Department of the Navy)	$1,025,700	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
38	Parts Life Inc. Through Deval Life Cycle Support LLC Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$994,146	<0.1%	Rank history: not on the FY2021 list, #32 in FY2022 and not on the FY2023–FY2024 lists; returned.
39	Evoqua Water Technologies LLC Through Fluid Handling LLC Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$978,018	<0.1%	Rank history: not on the FY2021–FY2023 lists and #63 in FY2024; up 24 since FY2024.
40	Supplycore LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DLA (Defense Logistics Agency)	$896,529	<0.1%	Rank history: not on the FY2021–FY2023 lists and #72 in FY2024; up 32 since FY2024.
41	Kampi Components Co Inc. Top agencies DLA (Defense Logistics Agency)	$837,887	<0.1%	Rank history: #24 in FY2021, not on the FY2022–FY2023 lists and #42 in FY2024; up 1 since FY2024.
42	Tactair Fluid Controls Inc 2 awardees, including Arkwin Industries, Inc. and Transdigm Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$793,987	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
43	T Bailey, LLC Top agencies Navy (Department of the Navy)	$784,000	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
44	WEL-FAB Defense LLC Top agencies DLA (Defense Logistics Agency)	$782,567	<0.1%	Rank history: not on the FY2021–FY2022 lists, #62 in FY2023 and #47 in FY2024; up 3 since FY2024.
45	Renk Systems Corp Top agencies Navy (Department of the Navy)	$749,986	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
46	Thermo Fisher Scientific Inc. Through Thermo Fisher Scientific (Asheville) LLC Top agencies Navy (Department of the Navy)	$747,855	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
47	Baker & Associates Inc. Top agencies DLA (Defense Logistics Agency)	$719,802	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 90 since FY2024.
48	Newvac, LLC Top agencies DLA (Defense Logistics Agency)	$710,205	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
49	Eddy Pump Corporation Top agencies Navy (Department of the Navy)	$692,000	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
50	RTI Technologies, LLC Top agencies Navy (Department of the Navy)	$680,016	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
51	RPS Holdings, Inc. Through Rantec Power Systems Inc. Top agencies Navy (Department of the Navy)	$661,500	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
52	Proponent, Inc. Through H C Merchandisers, Inc. Top agencies DLA (Defense Logistics Agency)	$614,334	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
53	Argo Turboserve Corporation Top agencies DLA (Defense Logistics Agency)	$603,881	<0.1%	Rank history: not on the FY2021 list, #67 in FY2022, #36 in FY2023 and #37 in FY2024; down 16 since FY2024.
54	Tomahawk Sourcing LLC Top agencies DLA (Defense Logistics Agency)	$595,125	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 175 since FY2024.
55	Leonardo S.p.A. 4 awardees, including Pivotal Power Inc., Laurel Technologies Partnership and DRS Naval Power Systems Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$560,359	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
56	Containers Unlimited LLC Top agencies Army (Department of the Army) VA (Department of Veterans Affairs) OSD (Office of the Secretary of Defense)	$553,214	<0.1%	Rank history: not on the FY2021–FY2022 lists, #41 in FY2023 and not on the FY2024 list; up 256 since FY2024.
57	Advanced Packaging LLC Top agencies Navy (Department of the Navy)	$547,550	<0.1%	Rank history: #69 in FY2021, #23 in FY2022, #34 in FY2023 and not on the FY2024 list; up 88 since FY2024.
58	Aef-Performance LLC Top agencies DLA (Defense Logistics Agency)	$546,380	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
59	Preece Incorporated Through Aerol Co., Inc. Top agencies DLA (Defense Logistics Agency)	$537,435	<0.1%	Rank history: not on the FY2021 list, #72 in FY2022, #98 in FY2023 and not on the FY2024 list; up 56 since FY2024.
60	CP Industries Holdings Inc Top agencies Navy (Department of the Navy)	$535,830	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
61	Lake Shore Systems Inc. Top agencies Navy (Department of the Navy)	$524,890	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
62	Snap-On Incorporated 2 awardees, including Snap-On Tools International, LLC and Idsc Holdings LLC Top agencies USAF (Department of the Air Force)	$518,958	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
63	Boss Innovation & Marketing Inc. Top agencies DOJ (Department of Justice)	$494,081	<0.1%	Rank history: #77 in FY2021, #53 in FY2022, #63 in FY2023 and #62 in FY2024; down 1 since FY2024.
64	Jag Components, LLC Top agencies DLA (Defense Logistics Agency)	$487,723	<0.1%	Rank history: not on the FY2021 list, #49 in FY2022, #15 in FY2023 and #58 in FY2024; down 6 since FY2024.
65	Burhani Enterprises Inc. Top agencies DLA (Defense Logistics Agency)	$475,284	<0.1%	Rank history: not on the FY2021–FY2023 lists and #92 in FY2024; up 27 since FY2024.
66	Federal Resources Supply Company, LLC Top agencies DLA (Defense Logistics Agency)	$472,056	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 167 since FY2024.
67	The Champion Company Top agencies Navy (Department of the Navy)	$470,995	<0.1%	Rank history: #33 in FY2021, #8 in FY2022, #24 in FY2023 and not on the FY2024 list; up 290 since FY2024.
68	Electro Parts Inc. Top agencies DLA (Defense Logistics Agency)	$467,266	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
69	Pikes Peak Cargo Secure, Inc. Top agencies DLA (Defense Logistics Agency)	$455,748	<0.1%	Rank history: not on the FY2021 list, #90 in FY2022, #46 in FY2023 and not on the FY2024 list; up 58 since FY2024.
70	Alexandria Investments LLC Top agencies Army (Department of the Army)	$435,865	<0.1%	Rank history: not on the FY2021–FY2023 lists and #56 in FY2024; down 14 since FY2024.
71	Inflation Systems, Inc. Top agencies DLA (Defense Logistics Agency)	$433,200	<0.1%	Rank history: not on the FY2021 list, #89 in FY2022, not on the FY2023 list and #52 in FY2024; down 19 since FY2024.
72	Hornet Acquisitionco LLC 2 awardees, including Maxim Evaporators of America, LLC and Fairbanks Morse, LLC Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$422,718	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
73	Coordinated Defense Supply Systems, Inc. Top agencies USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$411,398	<0.1%	Rank history: not on the FY2021 list, #100 in FY2022 and not on the FY2023–FY2024 lists; up 66 since FY2024.
74	Arizona Waste Oil Service, Inc. Top agencies USAF (Department of the Air Force)	$408,456	<0.1%	Rank history: not on the FY2021–FY2023 lists and #53 in FY2024; down 21 since FY2024.
75	Lynchburg Air Preheater Corporation Top agencies Army (Department of the Army) DOI (Department of the Interior) Commerce (Department of Commerce)	$404,309	<0.1%	Rank history: not on the FY2021 list, #84 in FY2022, not on the FY2023 list and #34 in FY2024; down 41 since FY2024.
76	Houston Global Distribution LLC Top agencies USAF (Department of the Air Force)	$400,000	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
77	Diversified Heat Transfer, Inc. Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy)	$399,693	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
78	GMS Industrial Supply, Inc. Through Sanitz Enterprises, Inc. Top agencies DLA (Defense Logistics Agency)	$393,645	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
79	ABW Technologies, Inc. Top agencies Navy (Department of the Navy)	$392,624	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
80	Myers Container, LLC Top agencies Navy (Department of the Navy)	$390,511	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 247 since FY2024.
81	Aero Precision Industries LLC Through Allclear Aerospace & Defense, Inc. Top agencies DLA (Defense Logistics Agency)	$385,771	<0.1%	Rank history: #36 in FY2021, #45 in FY2022 and not on the FY2023–FY2024 lists; returned.
82	Peterson Machinery Co Top agencies DOJ (Department of Justice)	$381,762	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
83	Par Defense Industries, LLC Top agencies DLA (Defense Logistics Agency)	$378,368	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
84	Teal, LLC Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$372,004	<0.1%	Rank history: #50 in FY2021 and not on the FY2022–FY2024 lists; up 59 since FY2024.
85	TNL Sales LLC Top agencies DLA (Defense Logistics Agency)	$361,458	<0.1%	Rank history: not on the FY2021–FY2022 lists, #58 in FY2023 and #50 in FY2024; down 35 since FY2024.
86	FSR Consulting LLC Top agencies Navy (Department of the Navy)	$349,998	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 295 since FY2024.
87	MTM Business Systems Top agencies USAF (Department of the Air Force)	$349,995	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
88	Separator Spares & Equipment LLC Top agencies DLA (Defense Logistics Agency)	$349,340	<0.1%	Rank history: not on the FY2021–FY2023 lists and #95 in FY2024; up 7 since FY2024.
89	Sentinel Services, LLC Top agencies VA (Department of Veterans Affairs)	$335,975	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
90	The Boeing Company 5 awardees, including Boeing Distribution, Inc., Boeing Distribution Services X, Inc. and Boeing Distribution Services, Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$331,023	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 23 since FY2024.
91	Lanzen, Incorporated Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$327,843	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 18 since FY2024.
92	S I T Corporation Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$312,274	<0.1%	Rank history: #35 in FY2021, not on the FY2022 list, #43 in FY2023 and #41 in FY2024; down 51 since FY2024.
93	Bizon Group, Inc. Top agencies DOJ (Department of Justice) USAF (Department of the Air Force) DHS (Department of Homeland Security)	$305,385	<0.1%	Rank history: #83 in FY2021, not on the FY2022 list, #88 in FY2023 and not on the FY2024 list; up 187 since FY2024.
94	Valcorp Enterprises LLC Top agencies DLA (Defense Logistics Agency)	$304,807	<0.1%	Rank history: not on the FY2021–FY2023 lists and #74 in FY2024; down 20 since FY2024.
95	MCO Solutions, Inc. Top agencies DLA (Defense Logistics Agency)	$304,182	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 15 since FY2024.
96	Playpower LT Farmington Inc. Through API Heat Transfer Inc. Top agencies NASA (National Aeronautics and Space Administration) DHS (Department of Homeland Security)	$303,539	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
97	SRM Manufacturing, Inc. Top agencies DOI (Department of the Interior)	$302,845	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
98	Lotususa, Inc. Top agencies DLA (Defense Logistics Agency) DOI (Department of the Interior)	$301,226	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 176 since FY2024.
99	Stag Enterprise, Inc. Top agencies Navy (Department of the Navy)	$295,089	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
100	Prime Mover Holdings LLC Through Motor Services Hugo Stamp Inc. Top agencies Navy (Department of the Navy)	$294,550	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.

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100 of 664 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 3324

Code	Net obligations	Largest contractor
33241 Power Boiler and Heat Exchanger Manufacturing	$2,192,673,403	Bechtel Corp
33243 Metal Can, Box, and Other Metal Container (Light Gauge) Manufacturing	$315,882,404	Conco, Inc.
33242 Metal Tank (Heavy Gauge) Manufacturing	$27,112,098	Isometrics 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 $2.69 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. An awardee whose own actions mostly name no parent, and that no other company's actions name as their parent, rolls up its SAM.gov registration's chain of parent companies: it counts under the first company there that other companies' actions name as their parent, or under the parent most of a company's own actions name, whichever comes first; with neither, under the highest company in the chain with federal contracts of its own. Joint ventures stay companies of their own. 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.

Quick answers

Who were the top 10 NAICS 3324 contractors in FY2025?

1. Bechtel Corp ($2.14B), 2. Conco, Inc. ($131M), 3. BOH Environmental L.L.C. ($37.2M), 4. AAR Manufacturing, Inc. ($15.5M), 5. Isometrics Inc. ($13.6M), 6. Contract Industrial Tooling Inc. ($13.2M), 7. Brooks & Perkins, Inc. ($11M), 8. Atlantic Diving Supply, Inc. ($10.9M), 9. Huntington Ingalls Industries, Inc. ($9.8M), 10. Sharkcage Inc. ($9.42M).

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