Top 100 Contractors in NAICS 21: Mining, Quarrying, and Oil and Gas Extraction, FY2022

Name: Top 100 Contractors in NAICS 21: Mining, Quarrying, and Oil and Gas Extraction, FY2022
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2021 – Sep 30, 2022 Code page on GovTribe

The top 10 won 60% of FY2022 NAICS 21 contract dollars

Contract obligations: $205,981,905 Net of deobligations, by contracts coded NAICS 21 or a code under it
Contractors: 423 Parent companies with an obligation
Largest contractor: Usibelli Coal Mine, Inc. $35.1 million, 16.1% 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	Usibelli Coal Mine, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$35,060,840	16.1%	Rank history: #3 in FY2021, #1 in FY2023, #1 in FY2024 and #1 in FY2025; up 2 since FY2021.
2	Tetra Tech-Maytag Aircraft Corporation Joint Venture Top agencies DLA (Defense Logistics Agency)	$20,358,683	9.4%	Rank history: #2 in FY2021 and not on the FY2023–FY2025 lists; unchanged since FY2021.
3	Pond Constructors Inc. Top agencies DLA (Defense Logistics Agency)	$14,483,018	6.7%	Rank history: #5 in FY2021, not on the FY2023 list, #45 in FY2024 and not on the FY2025 list; up 2 since FY2021.
4	Olgoonik Oilfield Services LLC Top agencies DOI (Department of the Interior)	$13,075,260	6.0%	Rank history: not on the FY2021 list, #31 in FY2023, #2 in FY2024 and #35 in FY2025; new.
5	Tiger Natural Gas, Inc. Top agencies USAF (Department of the Air Force) VA (Department of Veterans Affairs) NASA (National Aeronautics and Space Administration)	$12,088,241	5.6%	Rank history: #7 in FY2021, #2 in FY2023 and not on the FY2024–FY2025 lists; up 2 since FY2021.
6	NRG Energy, Inc. Through NRG Business Marketing LLC Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) DHS (Department of Homeland Security)	$8,409,585	3.9%	Rank history: #26 in FY2021 and not on the FY2023–FY2025 lists; up 20 since FY2021.
7	Crowley Holdings LLC 2 awardees Top agencies DOI (Department of the Interior) Army (Department of the Army) USAF (Department of the Air Force)	$7,976,052	3.7%	Rank history: #8 in FY2021, #8 in FY2023, #7 in FY2024 and #7 in FY2025; up 1 since FY2021.
8	Arctic Slope Regional Corporation Through Asrc Consulting & Environmental Services, LLC Top agencies DOI (Department of the Interior) DOE (Department of Energy)	$7,246,165	3.3%	Rank history: #1 in FY2021, not on the FY2023–FY2024 lists and #3 in FY2025; down 7 since FY2021.
9	Tarpan Construction, LLC Top agencies Army (Department of the Army)	$6,156,611	2.8%	Rank history: #52 in FY2021, #5 in FY2023, #13 in FY2024 and #32 in FY2025; up 43 since FY2021.
10	Centerpoint Energy Services Inc. Through Nextera Energy Services Gas, LLC Top agencies Army (Department of the Army) VA (Department of Veterans Affairs) DOJ (Department of Justice)	$4,567,827	2.1%	Rank history: #12 in FY2021, #11 in FY2023, #18 in FY2024 and not on the FY2025 list; up 2 since FY2021.
11	International Trade Management Group, LLC Top agencies DOI (Department of the Interior)	$3,928,246	1.8%	Rank history: #46 in FY2021, not on the FY2023 list, #9 in FY2024 and not on the FY2025 list; up 35 since FY2021.
12	Weston Solutions Holdings, Inc. Through Weston Solutions Inc. Top agencies DLA (Defense Logistics Agency)	$3,469,970	1.6%	Rank history: #4 in FY2021 and not on the FY2023–FY2025 lists; down 8 since FY2021.
13	Pines Quality Inc. Top agencies DLA (Defense Logistics Agency)	$3,201,708	1.5%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 343 since FY2021.
14	Aviation Devices and Electronic Components, L.L.C. Top agencies DLA (Defense Logistics Agency)	$2,867,600	1.3%	Rank history: #15 in FY2021, #23 in FY2023 and not on the FY2024–FY2025 lists; up 1 since FY2021.
15	Interagency Readiness Solutions, LLC Top agencies Army (Department of the Army)	$2,704,033	1.2%	Rank history: #9 in FY2021 and not on the FY2023–FY2025 lists; down 6 since FY2021.
16	Aventus NV, Inc. Top agencies Army (Department of the Army)	$2,419,310	1.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
17	EIFFAGE Through Eiffage Infraestructuras Sau Top agencies USAF (Department of the Air Force)	$2,014,354	0.9%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 143 since FY2021.
18	American Classic Construction Inc. Top agencies DOI (Department of the Interior) Army (Department of the Army) USAF (Department of the Air Force)	$1,867,001	0.9%	Rank history: #13 in FY2021, #17 in FY2023, #8 in FY2024 and #10 in FY2025; down 5 since FY2021.
19	Supplied Industrial Solutions, Inc. Top agencies Army (Department of the Army)	$1,795,500	0.8%	Rank history: not on the FY2021 list, #94 in FY2023 and not on the FY2024–FY2025 lists; new.
20	Exelon Corporation Through Constellation Newenergy - Gas Division, LLC Top agencies Army (Department of the Army)	$1,718,659	0.8%	Rank history: #6 in FY2021, #13 in FY2023 and not on the FY2024–FY2025 lists; down 14 since FY2021.
21	P G & E LLC Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$1,706,768	0.8%	Rank history: #74 in FY2021 and not on the FY2023–FY2025 lists; up 53 since FY2021.
22	Jordan Modern Oil & Fuel Services Ltd. Co. Top agencies DOS (Department of State)	$1,697,250	0.8%	Rank history: not on the FY2021 list, #16 in FY2023, #20 in FY2024 and #19 in FY2025; new.
23	A.m.s. Network, LLC Top agencies DLA (Defense Logistics Agency)	$1,551,066	0.7%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 293 since FY2021.
24	Constellation Newenergy - Gas Division LLC Top agencies Army (Department of the Army)	$1,475,294	0.7%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
25	CF Padilla LLC Top agencies DOI (Department of the Interior)	$1,322,579	0.6%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
26	Cobb Electric Membership Corporation Through Gas South, LLC Top agencies NASA (National Aeronautics and Space Administration) DOJ (Department of Justice)	$1,293,020	0.6%	Rank history: #86 in FY2021, #37 in FY2023, not on the FY2024 list and #50 in FY2025; up 60 since FY2021.
27	Advanced American Construction, Inc. Top agencies DOI (Department of the Interior)	$1,138,100	0.5%	Rank history: not on the FY2021 list, #20 in FY2023 and not on the FY2024–FY2025 lists; new.
28	Snow Consulting and Services, Inc. Top agencies DOI (Department of the Interior)	$1,133,322	0.5%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
29	Gulf Holdings, LLC Top agencies DOI (Department of the Interior) DLA (Defense Logistics Agency) USDA (Department of Agriculture)	$1,129,216	0.5%	Rank history: #19 in FY2021, not on the FY2023 list, #87 in FY2024 and #56 in FY2025; down 10 since FY2021.
30	Enspire Energy, LLC Top agencies DOJ (Department of Justice)	$1,081,904	0.5%	Rank history: #22 in FY2021, #28 in FY2023, #40 in FY2024 and #43 in FY2025; down 8 since FY2021.
31	Omang Technologies & Trading L.l.c Top agencies USAF (Department of the Air Force)	$1,048,600	0.5%	Rank history: not on the FY2021 list, #66 in FY2023 and not on the FY2024–FY2025 lists; new.
32	Pala Wood Services Company, Inc. Top agencies Army (Department of the Army)	$1,040,578	0.5%	Rank history: #35 in FY2021, #29 in FY2023 and not on the FY2024–FY2025 lists; up 3 since FY2021.
33	Ajce Corporation Top agencies DOI (Department of the Interior)	$946,713	0.4%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
34	Suburban Propane Partners, L.P Top agencies DOI (Department of the Interior) Navy (Department of the Navy)	$873,229	0.4%	Rank history: #60 in FY2021, #63 in FY2023, not on the FY2024 list and #59 in FY2025; up 26 since FY2021.
35	Unimex Corporation Through Paragon Defense Solutions Inc. Top agencies DLA (Defense Logistics Agency)	$829,900	0.4%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
36	Texas Ohio Energy Inc. Through High Desert Pipeline, Inc. Top agencies Army (Department of the Army)	$756,303	0.3%	Rank history: not on the FY2021 list, #14 in FY2023, #15 in FY2024 and not on the FY2025 list; up 76 since FY2021.
37	Fireside Natural Gas LLC Top agencies USAF (Department of the Air Force) DHS (Department of Homeland Security)	$731,905	0.3%	Rank history: #66 in FY2021, #41 in FY2023, #44 in FY2024 and not on the FY2025 list; up 29 since FY2021.
38	Green Dream International LLC Top agencies Army (Department of the Army) DOI (Department of the Interior) USDA (Department of Agriculture)	$704,277	0.3%	Rank history: #11 in FY2021, #51 in FY2023, not on the FY2024 list and #33 in FY2025; down 27 since FY2021.
39	Liquid Gold Well Service, Inc. Top agencies DOI (Department of the Interior)	$697,647	0.3%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 160 since FY2021.
40	Robotics Fabrication Inc. Top agencies USAF (Department of the Air Force)	$662,471	0.3%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
41	Architectural Consulting Group of Chicago Inc. Top agencies Army (Department of the Army)	$659,338	0.3%	Rank history: #39 in FY2021 and not on the FY2023–FY2025 lists; down 2 since FY2021.
42	Schuck Development Corp Top agencies USDA (Department of Agriculture)	$631,000	0.3%	Rank history: not on the FY2021 list, not on the FY2023–FY2024 lists and #67 in FY2025; new.
43	Sage Energy Trading LLC Top agencies USAF (Department of the Air Force)	$612,091	0.3%	Rank history: #10 in FY2021 and not on the FY2023–FY2025 lists; down 33 since FY2021.
44	Borlie Mechanical Contracting LLC Top agencies Army (Department of the Army)	$597,923	0.3%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
45	Beaver Lake Quarry Inc. Top agencies Army (Department of the Army)	$575,118	0.3%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
46	Cowden Inc. Top agencies Army (Department of the Army)	$559,769	0.3%	Rank history: #76 in FY2021, #88 in FY2023 and not on the FY2024–FY2025 lists; up 30 since FY2021.
47	NRG Business Marketing LLC Top agencies DOJ (Department of Justice) VA (Department of Veterans Affairs)	$556,204	0.3%	Rank history: not on the FY2021 list, #10 in FY2023, #17 in FY2024 and #15 in FY2025; new.
48	Centrica PLC Through NRG Business Marketing LLC Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) DOJ (Department of Justice)	$551,628	0.3%	Rank history: #17 in FY2021, #6 in FY2023, #22 in FY2024 and not on the FY2025 list; down 31 since FY2021.
49	Contracting Solutions, Inc. Top agencies Smithsonian (Smithsonian Institution)	$543,164	0.2%	Rank history: not on the FY2021 list, not on the FY2023 list, #48 in FY2024 and not on the FY2025 list; new.
50	Bayer Construction Company, Inc. Top agencies Army (Department of the Army)	$539,698	0.2%	Rank history: #64 in FY2021, #40 in FY2023, #37 in FY2024 and #34 in FY2025; up 14 since FY2021.
51	Grarok LLC Top agencies Army (Department of the Army)	$516,000	0.2%	Rank history: #48 in FY2021, #42 in FY2023, #32 in FY2024 and #40 in FY2025; down 3 since FY2021.
52	Crowley Maritime Corporation Through Crowley Government Services, Inc. Top agencies Army (Department of the Army)	$500,000	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
53	Premier LLC Top agencies DOI (Department of the Interior)	$496,800	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
54	DBR Investments Inc. Top agencies DOI (Department of the Interior)	$462,725	0.2%	Rank history: not on the FY2021 list, not on the FY2023–FY2024 lists and #11 in FY2025; new.
55	Moss Kevin Top agencies Army (Department of the Army)	$437,640	0.2%	Rank history: #56 in FY2021, #52 in FY2023, not on the FY2024 list and #47 in FY2025; up 1 since FY2021.
56	Griffin's Propane, Inc. Top agencies HHS (Department of Health and Human Services)	$410,000	0.2%	Rank history: not on the FY2021 list, #57 in FY2023, #54 in FY2024 and not on the FY2025 list; new.
57	Al Zoba General Trading & Contracting Co. WLL Top agencies Army (Department of the Army)	$396,141	0.2%	Rank history: not on the FY2021 list, #93 in FY2023, #49 in FY2024 and not on the FY2025 list; new.
58	Sebang Oil Corporation Top agencies Army (Department of the Army)	$369,257	0.2%	Rank history: not on the FY2021 list, #67 in FY2023, #68 in FY2024 and #71 in FY2025; new.
59	Kampi Components Co Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$367,485	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 243 since FY2021.
60	Sean W Smith Inc. Top agencies Army (Department of the Army)	$367,113	0.2%	Rank history: #32 in FY2021, #58 in FY2023, #55 in FY2024 and not on the FY2025 list; down 28 since FY2021.
61	Pitlik & Wick, Inc. Top agencies USDA (Department of Agriculture)	$352,399	0.2%	Rank history: #82 in FY2021, #83 in FY2023, #88 in FY2024 and not on the FY2025 list; up 21 since FY2021.
62	Saudi Naval Support Co. Top agencies USAF (Department of the Air Force)	$337,410	0.2%	Rank history: #16 in FY2021 and not on the FY2023–FY2025 lists; down 46 since FY2021.
63	Ames 1, LLC Top agencies USAF (Department of the Air Force)	$335,470	0.2%	Rank history: #65 in FY2021, #48 in FY2023, #52 in FY2024 and not on the FY2025 list; up 2 since FY2021.
64	Pyramid Construction and Aggregates, Inc. Top agencies DOI (Department of the Interior)	$328,000	0.2%	Rank history: #61 in FY2021 and not on the FY2023–FY2025 lists; down 3 since FY2021.
65	Farr Trucking, Inc. Top agencies DOI (Department of the Interior)	$327,480	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
66	Iron Mountain Quarry LLC Top agencies Army (Department of the Army)	$311,069	0.1%	Rank history: not on the FY2021 list, #45 in FY2023, #60 in FY2024 and not on the FY2025 list; new.
67	TGS-Nopec Geophysical Company Through A2D Technologies, Inc. Top agencies DOI (Department of the Interior)	$305,859	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
68	Pine Bluffs Gravel & Excavating, Inc. Top agencies USDA (Department of Agriculture)	$305,837	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
69	Hurst-Rosche, Inc. Top agencies Army (Department of the Army)	$303,573	0.1%	Rank history: not on the FY2021 list, #35 in FY2023, #71 in FY2024 and #94 in FY2025; new.
70	Ingenieria Y Servicios FG SAS Top agencies DOS (Department of State)	$294,057	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 60 since FY2021.
71	The Allen Co Inc. Top agencies Army (Department of the Army)	$286,046	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
72	Clark Construction Co Inc Allen Top agencies DOI (Department of the Interior)	$260,000	0.1%	Rank history: #94 in FY2021, #72 in FY2023 and not on the FY2024–FY2025 lists; up 22 since FY2021.
73	E2 Contracting, Inc. Top agencies DOI (Department of the Interior)	$251,503	0.1%	Rank history: #62 in FY2021, not on the FY2023 list, #35 in FY2024 and #37 in FY2025; down 11 since FY2021.
74	Willard Quarries, Inc. Top agencies Army (Department of the Army)	$245,333	0.1%	Rank history: #87 in FY2021, #46 in FY2023, #27 in FY2024 and #29 in FY2025; up 13 since FY2021.
75	Dolese Bros. Co. Top agencies Army (Department of the Army)	$241,825	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 188 since FY2021.
76	Roberts Timber Co., Inc. Top agencies DOI (Department of the Interior)	$239,026	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 150 since FY2021.
77	G & K Sarai Company Top agencies Army (Department of the Army)	$235,950	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
78	Acty Co., Ltd. Top agencies Navy (Department of the Navy)	$232,437	0.1%	Rank history: #79 in FY2021, #81 in FY2023, #90 in FY2024 and #87 in FY2025; up 1 since FY2021.
79	Berkshire Hathaway Inc. 2 awardees, including Mid American Energy Company and Klune Industries, Inc. Top agencies DOI (Department of the Interior) DLA (Defense Logistics Agency)	$221,793	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 65 since FY2021.
80	Yale Creek Inc. Top agencies Army (Department of the Army)	$220,868	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 68 since FY2021.
81	FD Inc. Top agencies USAF (Department of the Air Force)	$217,982	0.1%	Rank history: #93 in FY2021, #92 in FY2023 and not on the FY2024–FY2025 lists; up 12 since FY2021.
82	MJL Enterprises, LLC Top agencies Army (Department of the Army) VA (Department of Veterans Affairs)	$216,189	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 24 since FY2021.
83	Big Sky Spreading, LLP Top agencies DOI (Department of the Interior)	$205,316	0.1%	Rank history: #57 in FY2021, not on the FY2023 list, #66 in FY2024 and not on the FY2025 list; down 26 since FY2021.
84	Ecology Mir Group LLC Top agencies Army (Department of the Army) DOI (Department of the Interior)	$200,003	0.1%	Rank history: #30 in FY2021, #43 in FY2023, not on the FY2024 list and #51 in FY2025; down 54 since FY2021.
85	Seaton Earthmover Inc. Top agencies Army (Department of the Army)	$199,120	0.1%	Rank history: #63 in FY2021, #84 in FY2023, #86 in FY2024 and not on the FY2025 list; down 22 since FY2021.
86	Kernen Construction Top agencies DOI (Department of the Interior)	$197,100	0.1%	Rank history: not on the FY2021 list, not on the FY2023–FY2024 lists and #53 in FY2025; new.
87	Robison Logging & Excavation Top agencies DOI (Department of the Interior)	$194,300	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
88	Strutner, Jessica Top agencies Army (Department of the Army)	$191,850	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
89	Appalachian Aggregates LLC 4 awardees Top agencies USDA (Department of Agriculture)	$188,243	0.1%	Rank history: #54 in FY2021 and not on the FY2023–FY2025 lists; down 35 since FY2021.
90	Woodrow Sapp Well Drilling, Inc. Top agencies USAF (Department of the Air Force)	$184,604	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 59 since FY2021.
91	Schrass GMBH Top agencies Army (Department of the Army)	$178,902	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 36 since FY2021.
92	A Plus Well Service Inc. Top agencies DOI (Department of the Interior)	$176,970	0.1%	Rank history: #28 in FY2021 and not on the FY2023–FY2025 lists; down 64 since FY2021.
93	General Dynamics Corporation 3 awardees, including General Dynamics Land Systems - Canada Corporation, Electric Boat Corporation and General Dynamics-Ots, Inc. Top agencies DLA (Defense Logistics Agency)	$176,362	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 72 since FY2021.
94	Ayers Trucking, Inc. Top agencies DOI (Department of the Interior)	$171,000	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 44 since FY2021.
95	Goodfellow Bros. LLC Top agencies Army (Department of the Army)	$169,779	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
96	Ore Trading Establishment Top agencies USAF (Department of the Air Force)	$168,293	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 12 since FY2021.
97	Gebhardt Post Plant & Sawmill Top agencies USAF (Department of the Air Force)	$166,119	0.1%	Rank history: not on the FY2021 list, #73 in FY2023, #85 in FY2024 and #90 in FY2025; up 14 since FY2021.
98	Mid South Suppliers, LLC Top agencies DOI (Department of the Interior)	$163,800	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 18 since FY2021.
99	Scharnagl Hoch- UND Tiefbau-GMBH Top agencies Army (Department of the Army)	$150,896	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 51 since FY2021.
100	Impertec - Engenharia, Manutencao E Comercio LTDA Top agencies DOS (Department of State)	$146,393	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.

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100 of 423 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 21

Code	Net obligations	Largest contractor
212 Mining (except Oil and Gas)	$91,083,031	Usibelli Coal Mine, Inc.
213 Support Activities for Mining	$76,838,601	Tetra Tech-Maytag Aircraft Corporation Joint Venture
211 Oil and Gas Extraction	$38,060,274	Tiger Natural Gas, 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 $217 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 2022 ran Oct 1, 2021 – Sep 30, 2022. 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 FY2021. "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 FY2021 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 21 contractors in FY2022?

1. Usibelli Coal Mine, Inc. ($35.1M), 2. Tetra Tech-Maytag Aircraft Corporation Joint Venture ($20.4M), 3. Pond Constructors Inc. ($14.5M), 4. Olgoonik Oilfield Services LLC ($13.1M), 5. Tiger Natural Gas, Inc. ($12.1M), 6. NRG Energy, Inc. ($8.41M), 7. Crowley Holdings LLC ($7.98M), 8. Arctic Slope Regional Corporation ($7.25M), 9. Tarpan Construction, LLC ($6.16M), 10. Centerpoint Energy Services Inc. ($4.57M).

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