Top 100 Contractors in PSC 54: Prefabricated Structures/Scaffolding, FY2021

Name: Top 100 Contractors in PSC 54: Prefabricated Structures/Scaffolding, FY2021
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2020 – Sep 30, 2021 Code page on GovTribe

The top 10 won 50% of FY2021 PSC 54 contract dollars

Contract obligations: $677,196,109 Net of deobligations, by contracts coded PSC 54 or a code under it
Contractors: 751 Parent companies with an obligation
Largest contractor: Acrow Corporation of America $69.4 million, 10.1% 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	Acrow Corporation of America Top agencies Army (Department of the Army) USDA (Department of Agriculture)	$69,356,248	10.1%	Rank history: #9 in FY2022, not on the FY2023 list, #20 in FY2024 and not on the FY2025 list; up 6 since FY2020.
2	Leonardo S.p.A. 2 awardees, including DRS Sustainment Systems, Inc. and Engineered Coil Company Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$43,980,758	6.4%	Rank history: #7 in FY2022, #1 in FY2023, #2 in FY2024 and #2 in FY2025; up 1 since FY2020.
3	General Dynamics Corporation 3 awardees, including General Dynamics European Land Systems-Bridge Systems GMBH, General Dynamics Mission Systems, Inc. and Electric Boat Corporation Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$42,475,795	6.2%	Rank history: #12 in FY2022, not on the FY2023 list, #9 in FY2024 and not on the FY2025 list; up 20 since FY2020.
4	Reliance Steel & Aluminum Co Through I-Solutions Direct, Inc. Top agencies DLA (Defense Logistics Agency)	$41,324,252	6.0%	Rank history: #4 in FY2022, #5 in FY2023, #48 in FY2024 and not on the FY2025 list; up 2 since FY2020.
5	O'Neal Industries Inc Through TW Metals, Inc. Top agencies DLA (Defense Logistics Agency)	$37,614,851	5.5%	Rank history: #8 in FY2022, #10 in FY2023, #18 in FY2024 and #17 in FY2025; up 5 since FY2020.
6	Theodor Wille Intertrade GMBH Through Atlantic Diving Supply, Inc. Top agencies USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$32,168,081	4.7%	Rank history: #6 in FY2022, #32 in FY2023 and not on the FY2024–FY2025 lists; up 3 since FY2020.
7	Elite Aluminum Corp Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$29,933,565	4.4%	Rank history: not on the FY2022 list, #49 in FY2023 and not on the FY2024–FY2025 lists; up 1 since FY2020.
8	Acrow Global Limited Top agencies Army (Department of the Army)	$21,221,966	3.1%	Rank history: #11 in FY2022 and not on the FY2023–FY2025 lists; down 6 since FY2020.
9	Production Products Manufacturing & Sales Co., Inc. Top agencies Army (Department of the Army)	$13,675,611	2.0%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
10	Kratos Defense & Security Solutions, Inc. Through Gichner Systems Group, Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$13,334,292	1.9%	Rank history: #16 in FY2022, #17 in FY2023, #15 in FY2024 and #16 in FY2025; up 45 since FY2020.
11	Miami Technology Solutions, LLC Top agencies Army (Department of the Army)	$13,177,652	1.9%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
12	Computer World Services, Corp. Top agencies DHS (Department of Homeland Security)	$12,659,667	1.9%	Rank history: #10 in FY2022 and not on the FY2023–FY2025 lists; up 7 since FY2020.
13	Compotech Inc. Top agencies Army (Department of the Army)	$12,325,113	1.8%	Rank history: #14 in FY2022, not on the FY2023 list, #6 in FY2024 and #15 in FY2025; new, not ranked in FY2020.
14	Western Metal Supply Company, Inc. Top agencies USAF (Department of the Air Force) USSOCOM (United States Special Operations Command) DOI (Department of the Interior)	$9,721,845	1.4%	Rank history: #94 in FY2022, #55 in FY2023, not on the FY2024 list and #77 in FY2025; up 32 since FY2020.
15	Modular Concepts, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army)	$8,925,881	1.3%	Rank history: not on the FY2022–FY2025 lists; up 468 since FY2020.
16	Macro Vantage Levant Dmcc Top agencies Army (Department of the Army)	$8,706,146	1.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
17	PCI Support Services LLC Top agencies HHS (Department of Health and Human Services) Army (Department of the Army)	$8,482,305	1.2%	Rank history: #34 in FY2022, #14 in FY2023, #7 in FY2024 and #20 in FY2025; new, not ranked in FY2020.
18	Isometrics Inc. Top agencies Army (Department of the Army)	$7,853,840	1.1%	Rank history: not on the FY2022–FY2023 lists, #21 in FY2024 and #10 in FY2025; new, not ranked in FY2020.
19	General Southern Industries Inc Through G & G Steel Inc. Top agencies Army (Department of the Army)	$7,727,784	1.1%	Rank history: not on the FY2022 list, #84 in FY2023 and not on the FY2024–FY2025 lists; up 407 since FY2020.
20	Aarcorp Through AAR Manufacturing, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration)	$7,630,892	1.1%	Rank history: #20 in FY2022, #41 in FY2023 and not on the FY2024–FY2025 lists; up 25 since FY2020.
21	Uh Structures Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) DHS (Department of Homeland Security)	$7,030,184	1.0%	Rank history: not on the FY2022 list, #34 in FY2023, #88 in FY2024 and #78 in FY2025; up 14 since FY2020.
22	Agate Steel Inc. Top agencies USAF (Department of the Air Force)	$6,925,541	1.0%	Rank history: #30 in FY2022 and not on the FY2023–FY2025 lists; up 3 since FY2020.
23	Pro-Mark Services Inc. Top agencies DOI (Department of the Interior)	$6,530,605	1.0%	Rank history: #33 in FY2022 and not on the FY2023–FY2025 lists; down 8 since FY2020.
24	Modular Management Group Inc. Top agencies USAF (Department of the Air Force) VA (Department of Veterans Affairs)	$6,451,549	0.9%	Rank history: #13 in FY2022, #4 in FY2023, #10 in FY2024 and #13 in FY2025; up 8 since FY2020.
25	Intelligent Waves LLC Top agencies USAF (Department of the Air Force)	$6,438,461	0.9%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
26	XFS Global, LLC Top agencies Army (Department of the Army) USSOCOM (United States Special Operations Command) USAF (Department of the Air Force)	$6,010,315	0.9%	Rank history: not on the FY2022–FY2025 lists; down 5 since FY2020.
27	Steward Machine Co Inc. Top agencies Army (Department of the Army)	$5,710,212	0.8%	Rank history: not on the FY2022–FY2025 lists; up 4 since FY2020.
28	The Entwistle Trust Through The Entwistle Company LLC Top agencies Army (Department of the Army)	$5,502,560	0.8%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
29	Government of Canada Through Canadian Commercial Corporation Top agencies Army (Department of the Army)	$4,923,042	0.7%	Rank history: #18 in FY2022 and not on the FY2023–FY2025 lists; up 8 since FY2020.
30	Dari Concepts LLC Top agencies Army (Department of the Army)	$4,735,521	0.7%	Rank history: #64 in FY2022, not on the FY2023–FY2024 lists and #91 in FY2025; new, not ranked in FY2020.
31	Enshaat Al Sayer Gen Tradg & Cont Co WLL Top agencies Army (Department of the Army)	$4,622,076	0.7%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
32	Mcgrath Rentcorp 2 awardees, including Design Space Modular Buildings Pnw, LP Top agencies DOI (Department of the Interior) NASA (National Aeronautics and Space Administration) Army (Department of the Army)	$4,482,523	0.7%	Rank history: not on the FY2022 list, #100 in FY2023 and not on the FY2024–FY2025 lists; up 76 since FY2020.
33	Nally & Haydon, LLC Through Armag Corp Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$4,318,717	0.6%	Rank history: #24 in FY2022, #19 in FY2023 and not on the FY2024–FY2025 lists; up 1 since FY2020.
34	New Light Technologies Inc. Top agencies DHS (Department of Homeland Security)	$4,218,460	0.6%	Rank history: not on the FY2022–FY2025 lists; up 32 since FY2020.
35	Hunter Saak Investments, LLC Top agencies USAF (Department of the Air Force)	$3,833,259	0.6%	Rank history: #39 in FY2022, #67 in FY2023 and not on the FY2024–FY2025 lists; up 23 since FY2020.
36	L. B. Foster Company Through CXT Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior) Army (Department of the Army)	$3,731,985	0.5%	Rank history: #31 in FY2022, #27 in FY2023, #46 in FY2024 and not on the FY2025 list; up 24 since FY2020.
37	Integrated Modular Solutions, LLC Top agencies VA (Department of Veterans Affairs)	$3,092,818	0.5%	Rank history: #97 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
38	Prime One Group General Trading and Contracting Company WLL Top agencies USAF (Department of the Air Force) USSOCOM (United States Special Operations Command)	$3,002,946	0.4%	Rank history: not on the FY2022 list, #47 in FY2023 and not on the FY2024–FY2025 lists; up 18 since FY2020.
39	Big Top Manufacturing LLC Top agencies USAF (Department of the Air Force) DOT (Department of Transportation) DHS (Department of Homeland Security)	$2,932,727	0.4%	Rank history: #50 in FY2022, #81 in FY2023, #38 in FY2024 and #62 in FY2025; down 1 since FY2020.
40	Hunter Defense Technolog 2 awardees, including Berg Manufacturing, Inc. Top agencies Army (Department of the Army) DLA (Defense Logistics Agency) USAF (Department of the Air Force)	$2,549,461	0.4%	Rank history: #44 in FY2022 and not on the FY2023–FY2025 lists; down 1 since FY2020.
41	Spees LLC Through Spees-Hernandez JV LLC Top agencies VA (Department of Veterans Affairs)	$2,532,314	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
42	Strategic Solutions Unlimited, Inc. Top agencies Army (Department of the Army)	$2,476,378	0.4%	Rank history: not on the FY2022–FY2025 lists; down 14 since FY2020.
43	Tarpan Construction, LLC Top agencies Army (Department of the Army)	$2,424,558	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
44	Sea Box, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$2,409,011	0.4%	Rank history: #60 in FY2022, #39 in FY2023 and not on the FY2024–FY2025 lists; up 66 since FY2020.
45	American Homestar Corporation Top agencies DHS (Department of Homeland Security)	$2,355,072	0.3%	Rank history: not on the FY2022 list, #6 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
46	Noble Sales Co. Inc. 2 awardees, including Noble Supply & Logistics, LLC and Tactical & Survival Specialties, LLC Top agencies USAF (Department of the Air Force) DOJ (Department of Justice) GSA (General Services Administration)	$2,341,707	0.3%	Rank history: #58 in FY2022 and not on the FY2023–FY2025 lists; up 8 since FY2020.
47	Cremer Global Services, Incorporated Top agencies Army (Department of the Army)	$2,341,387	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
48	Battelle Memorial Institute Through Battelle National Biodefense Institute, LLC Top agencies DHS (Department of Homeland Security)	$2,329,734	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
49	GSH of Alabama LLC Top agencies DHS (Department of Homeland Security)	$2,324,097	0.3%	Rank history: #3 in FY2022, #8 in FY2023, #8 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
50	Al-Jafar Contracting Company Top agencies Army (Department of the Army)	$2,219,373	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
51	Lexington Homes, Inc. Top agencies DHS (Department of Homeland Security)	$2,130,696	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
52	Champion Home Builders Inc. Top agencies DHS (Department of Homeland Security)	$2,119,348	0.3%	Rank history: #1 in FY2022, #12 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
53	Gibbco LLC Top agencies DHS (Department of Homeland Security)	$2,040,941	0.3%	Rank history: #2 in FY2022, #3 in FY2023, not on the FY2024 list and #11 in FY2025; new, not ranked in FY2020.
54	Northbank Civil and Marine, LLC Top agencies Army (Department of the Army)	$1,795,000	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
55	Panel Built PTY Ltd Top agencies Army (Department of the Army)	$1,769,808	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
56	Advanced Computer Concepts, Inc. Top agencies USAF (Department of the Air Force)	$1,707,034	0.2%	Rank history: not on the FY2022 list, #37 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
57	Ranger Land Systems, Inc. Top agencies DHS (Department of Homeland Security)	$1,576,313	0.2%	Rank history: not on the FY2022 list, #38 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
58	Vista Outdoor Inc. Through Camelbak Products, LLC Top agencies GSA (General Services Administration)	$1,540,473	0.2%	Rank history: #48 in FY2022, #44 in FY2023 and not on the FY2024–FY2025 lists; down 1 since FY2020.
59	Saudi Co for Prefabricated Buildings Top agencies USAF (Department of the Air Force)	$1,502,150	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
60	Clegg Industries Inc. Top agencies Navy (Department of the Navy)	$1,446,351	0.2%	Rank history: not on the FY2022–FY2024 lists and #53 in FY2025; new, not ranked in FY2020.
61	GTA Containers, Inc. Top agencies DLA (Defense Logistics Agency) Army (Department of the Army)	$1,419,011	0.2%	Rank history: #26 in FY2022 and not on the FY2023–FY2025 lists; down 45 since FY2020.
62	Native Instinct LLC Top agencies DHS (Department of Homeland Security) USAF (Department of the Air Force) Army (Department of the Army)	$1,406,365	0.2%	Rank history: not on the FY2022–FY2025 lists; up 2 since FY2020.
63	Reece Ventures Ltd Through Pearson Engineering Limited Top agencies Army (Department of the Army)	$1,385,190	0.2%	Rank history: not on the FY2022–FY2025 lists; down 33 since FY2020.
64	Sustainable Modular Management, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) NASA (National Aeronautics and Space Administration)	$1,379,513	0.2%	Rank history: #22 in FY2022, #89 in FY2023, not on the FY2024 list and #80 in FY2025; down 52 since FY2020.
65	Berkshire Hathaway Inc. Through CMH Manufacturing, Inc. Top agencies DHS (Department of Homeland Security)	$1,370,802	0.2%	Rank history: #5 in FY2022, #22 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
66	Lumineye Inc. Top agencies DHS (Department of Homeland Security)	$1,301,172	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
67	Durable Good-Men JV, LLC Top agencies Navy (Department of the Navy)	$1,285,935	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
68	Allied Modular Building Systems, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) VA (Department of Veterans Affairs)	$1,276,553	0.2%	Rank history: not on the FY2022–FY2025 lists; up 56 since FY2020.
69	Kwikspace Guam Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$1,211,346	0.2%	Rank history: #43 in FY2022, #33 in FY2023, #67 in FY2024 and not on the FY2025 list; up 29 since FY2020.
70	Avon Engineered Fabrications LLC Through Aef-Performance LLC Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$1,208,065	0.2%	Rank history: #17 in FY2022, #11 in FY2023, #92 in FY2024 and not on the FY2025 list; down 44 since FY2020.
71	Denco, Inc. Top agencies USAF (Department of the Air Force)	$1,183,028	0.2%	Rank history: not on the FY2022 list, #48 in FY2023, not on the FY2024 list and #90 in FY2025; down 20 since FY2020.
72	Supplied Industrial Solutions, Inc. Top agencies Army (Department of the Army)	$1,139,133	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
73	Boom Concrete Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$1,127,936	0.2%	Rank history: #81 in FY2022, #80 in FY2023 and not on the FY2024–FY2025 lists; up 5 since FY2020.
74	B & H International LLC Top agencies DOE (Department of Energy) Navy (Department of the Navy) USAF (Department of the Air Force)	$1,121,222	0.2%	Rank history: not on the FY2022–FY2025 lists; up 87 since FY2020.
75	Federal Resources Supply Company Top agencies DLA (Defense Logistics Agency)	$1,061,651	0.2%	Rank history: not on the FY2022–FY2025 lists; up 14 since FY2020.
76	Dell Federal Systems L.P. Top agencies Army (Department of the Army)	$1,050,743	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
77	Pharmix USA LLC Top agencies Army (Department of the Army)	$1,011,426	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
78	Aaecon General Contracting LLC Top agencies USAF (Department of the Air Force)	$995,799	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
79	Cavco Industries, Inc. Through Lexington Homes, Inc. Top agencies DHS (Department of Homeland Security)	$977,859	0.1%	Rank history: #65 in FY2022, #13 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
80	3T Federal Solutions LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$972,713	0.1%	Rank history: not on the FY2022–FY2025 lists; up 65 since FY2020.
81	BHI Energy I Power Services LLC Top agencies Navy (Department of the Navy)	$932,428	0.1%	Rank history: not on the FY2022–FY2025 lists; up 353 since FY2020.
82	Winston-Salem Industries for the Blind Inc. Top agencies USAF (Department of the Air Force)	$887,691	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
83	Bike Track, Inc. Top agencies GSA (General Services Administration)	$802,052	0.1%	Rank history: #92 in FY2022, #75 in FY2023 and not on the FY2024–FY2025 lists; down 1 since FY2020.
84	Bespoke Project Solutions LLC Top agencies Commerce (Department of Commerce)	$801,344	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
85	Action Target Inc. Top agencies Army (Department of the Army)	$796,275	0.1%	Rank history: #61 in FY2022 and not on the FY2023–FY2025 lists; down 52 since FY2020.
86	Architectural House Est. for Contracting Top agencies USAF (Department of the Air Force)	$781,661	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
87	GTA Drum, Inc. Top agencies DLA (Defense Logistics Agency)	$781,017	0.1%	Rank history: not on the FY2022–FY2023 lists, #89 in FY2024 and #35 in FY2025; unchanged since FY2020.
88	EDL Construction Inc. Top agencies Army (Department of the Army)	$779,668	0.1%	Rank history: #89 in FY2022, not on the FY2023 list, #12 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
89	Tashjian Towers Corporation Top agencies USAF (Department of the Air Force)	$778,483	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
90	Scif Solutions, Inc. Top agencies USAF (Department of the Air Force) DHS (Department of Homeland Security)	$777,751	0.1%	Rank history: #66 in FY2022 and not on the FY2023–FY2025 lists; up 1 since FY2020.
91	A & A Sheet Metal Products Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) DOI (Department of the Interior)	$773,354	0.1%	Rank history: not on the FY2022–FY2024 lists and #30 in FY2025; up 201 since FY2020.
92	California Industrial Facilities Resources, Inc. Top agencies DHS (Department of Homeland Security) VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$760,622	0.1%	Rank history: not on the FY2022–FY2025 lists; down 29 since FY2020.
93	Anduril Industries, Inc. Top agencies DHS (Department of Homeland Security)	$739,525	0.1%	Rank history: not on the FY2022–FY2025 lists; down 92 since FY2020.
94	Ecsc LLC Top agencies USAF (Department of the Air Force)	$733,980	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
95	AKS Industries Inc. Top agencies Army (Department of the Army) DHS (Department of Homeland Security) USDA (Department of Agriculture)	$714,139	0.1%	Rank history: not on the FY2022–FY2025 lists; down 28 since FY2020.
96	Redguard LLC Top agencies USAF (Department of the Air Force) DHS (Department of Homeland Security) DOI (Department of the Interior)	$707,588	0.1%	Rank history: not on the FY2022–FY2023 lists, #83 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
97	I-Solutions Direct, Inc. Top agencies DLA (Defense Logistics Agency)	$660,784	0.1%	Rank history: not on the FY2022–FY2023 lists, #17 in FY2024 and #4 in FY2025; down 75 since FY2020.
98	Palomar Modular Buildings LLC Top agencies HHS (Department of Health and Human Services) Army (Department of the Army)	$655,032	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
99	Hesco Bastion Inc. Top agencies DLA (Defense Logistics Agency)	$654,986	0.1%	Rank history: not on the FY2022–FY2025 lists; down 82 since FY2020.
100	Terra Site Constructors LLC Top agencies GSA (General Services Administration)	$649,327	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.

Show 75 more

100 of 751 contractors listed here. See the rest on GovTribe.

Rankings for the codes under PSC 54

Code	Net obligations	Largest contractor
5410 Prefabricated and Portable Buildings	$213,441,222	Theodor Wille Intertrade GMBH
5420 Bridges, Fixed and Floating	$183,219,464	Acrow Corporation of America
5450 Miscellaneous Prefabricated Structures	$155,687,600	Reliance Steel & Aluminum Co
5411 Rigid Wall Shelters	$52,779,395	Elite Aluminum Corp
5430 Storage Tanks	$29,836,853	Isometrics Inc.
5440 Scaffolding Equipment and Concrete Forms	$10,053,860	Denco, Inc.
5445 Prefabricated Tower Structures	$4,394,673	Tashjian Towers Corporation

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 $684 million 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 2021 ran Oct 1, 2020 – Sep 30, 2021. 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 FY2020. "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 FY2020 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 54 contractors in FY2021?

1. Acrow Corporation of America ($69.4M), 2. Leonardo S.p.A. ($44M), 3. General Dynamics Corporation ($42.5M), 4. Reliance Steel & Aluminum Co ($41.3M), 5. O'Neal Industries Inc ($37.6M), 6. Theodor Wille Intertrade GMBH ($32.2M), 7. Elite Aluminum Corp ($29.9M), 8. Acrow Global Limited ($21.2M), 9. Production Products Manufacturing & Sales Co., Inc. ($13.7M), 10. Kratos Defense & Security Solutions, Inc. ($13.3M).

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