Top 100 Contractors in NAICS 3331: Agriculture, Construction, and Mining Machinery Manufacturing, FY2021

Name: Top 100 Contractors in NAICS 3331: Agriculture, Construction, and Mining Machinery Manufacturing, FY2021
Creator: GovTribe

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

The top 10 won 61% of FY2021 NAICS 3331 contract dollars

Contract obligations: $466,401,806 Net of deobligations, by contracts coded NAICS 3331 or a code under it
Contractors: 595 Parent companies with an obligation
Largest contractor: Caterpillar Inc. $110 million, 22.8% 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	Caterpillar Inc. 3 awardees Top agencies DLA (Defense Logistics Agency) Army (Department of the Army) DOI (Department of the Interior)	$109,827,527	22.8%	Rank history: #1 in FY2022, #2 in FY2023, #1 in FY2024 and #1 in FY2025; unchanged since FY2020.
2	JCB Inc. 2 awardees Top agencies Army (Department of the Army) DLA (Defense Logistics Agency) DOI (Department of the Interior)	$33,782,686	7.0%	Rank history: #4 in FY2022, #5 in FY2023, #6 in FY2024 and #2 in FY2025; unchanged since FY2020.
3	American Material Handling, Inc. Top agencies DLA (Defense Logistics Agency) Army (Department of the Army) DOI (Department of the Interior)	$28,939,585	6.0%	Rank history: #3 in FY2022, #3 in FY2023, #2 in FY2024 and #3 in FY2025; up 1 since FY2020.
4	Polaris Industries Inc. 2 awardees, including Polaris Sales Inc. and Taylor-Dunn Manufacturing, LLC Top agencies DLA (Defense Logistics Agency)	$21,378,880	4.4%	Rank history: #20 in FY2022, #12 in FY2023 and not on the FY2024–FY2025 lists; up 13 since FY2020.
5	Certified Stainless Service Inc. Top agencies DLA (Defense Logistics Agency)	$19,189,360	4.0%	Rank history: #9 in FY2022, #6 in FY2023, #14 in FY2024 and #19 in FY2025; unchanged since FY2020.
6	The Manitowoc Company. Inc. Through Grove U.s. LLC Top agencies Army (Department of the Army) DLA (Defense Logistics Agency) GSA (General Services Administration)	$19,175,220	4.0%	Rank history: #7 in FY2022, #7 in FY2023, #24 in FY2024 and not on the FY2025 list; down 3 since FY2020.
7	Globe Trailer Manufacturing, Inc. Top agencies DLA (Defense Logistics Agency)	$18,859,190	3.9%	Rank history: #12 in FY2022, not on the FY2023 list, #82 in FY2024 and not on the FY2025 list; up 4 since FY2020.
8	Deere & Company 3 awardees, including John Deere Shared Services, LLC and Wirtgen Deutschland Vertriebs- UND Service GMBH Top agencies DLA (Defense Logistics Agency) DOI (Department of the Interior) USDA (Department of Agriculture)	$16,195,210	3.4%	Rank history: #5 in FY2022, #8 in FY2023, #15 in FY2024 and #18 in FY2025; down 2 since FY2020.
9	Oshkosh Corp 3 awardees, including JLG Industries, Inc., Oshkosh Airport Products LLC and Oshkosh Defense LLC Top agencies DLA (Defense Logistics Agency) DOI (Department of the Interior) Smithsonian (Smithsonian Institution)	$13,691,768	2.8%	Rank history: #13 in FY2022, #13 in FY2023, #4 in FY2024 and #4 in FY2025; unchanged since FY2020.
10	AB Volvo 2 awardees, including Mack Defense LLC and Volvo Construction Equipment North America, LLC Top agencies DLA (Defense Logistics Agency)	$12,070,886	2.5%	Rank history: #6 in FY2022, #1 in FY2023, #7 in FY2024 and not on the FY2025 list; up 12 since FY2020.
11	Federal Contracts LLC Top agencies Army (Department of the Army) DOI (Department of the Interior) DOE (Department of Energy)	$11,934,274	2.5%	Rank history: #15 in FY2022, #16 in FY2023, #22 in FY2024 and #22 in FY2025; down 4 since FY2020.
12	Sumitomo Heavy Industries, Ltd. 2 awardees, including Link-Belt Cranes, L.p., LLLP and Sumiju Yokosuka Kogyo Co., Ltd. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$10,218,487	2.1%	Rank history: #11 in FY2022, #10 in FY2023 and not on the FY2024–FY2025 lists; down 2 since FY2020.
13	Bravo, Inc. Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) DOI (Department of the Interior)	$9,647,405	2.0%	Rank history: #10 in FY2022, not on the FY2023 list, #25 in FY2024 and #20 in FY2025; up 26 since FY2020.
14	Atlantic Machinery Inc. Top agencies DLA (Defense Logistics Agency)	$8,314,862	1.7%	Rank history: #14 in FY2022 and not on the FY2023–FY2025 lists; down 6 since FY2020.
15	Government of Canada Through Canadian Commercial Corporation Top agencies DLA (Defense Logistics Agency)	$7,645,317	1.6%	Rank history: #18 in FY2022, #26 in FY2023, #31 in FY2024 and not on the FY2025 list; up 15 since FY2020.
16	Konecranes Inc Through Konecranes Nuclear Equipment & Services, LLC Top agencies Army (Department of the Army)	$7,070,862	1.5%	Rank history: #8 in FY2022, #48 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
17	Aebi Schmidt Deutschland GMBH Through M-B Companies, Inc. Top agencies DLA (Defense Logistics Agency)	$6,114,079	1.3%	Rank history: #39 in FY2022, #18 in FY2023, #83 in FY2024 and not on the FY2025 list; up 17 since FY2020.
18	Wabash National Corp Through Garsite / Progress LLC Top agencies DLA (Defense Logistics Agency)	$5,963,886	1.2%	Rank history: #33 in FY2022 and not on the FY2023–FY2025 lists; down 5 since FY2020.
19	Aviate Enterprises, Inc. Top agencies VA (Department of Veterans Affairs) DHS (Department of Homeland Security) Army (Department of the Army)	$4,075,808	0.8%	Rank history: #23 in FY2022, #22 in FY2023, #29 in FY2024 and #29 in FY2025; up 133 since FY2020.
20	Proall International Mfg. Inc. Top agencies GSA (General Services Administration)	$3,812,047	0.8%	Rank history: #22 in FY2022, #38 in FY2023, #40 in FY2024 and #35 in FY2025; unchanged since FY2020.
21	Link-Belt Cranes, L.p., LLLP Top agencies DLA (Defense Logistics Agency)	$3,803,085	0.8%	Rank history: not on the FY2022–FY2023 lists, #17 in FY2024 and #15 in FY2025; down 6 since FY2020.
22	Earle Kinlaw & Associates, Inc. Top agencies Army (Department of the Army) DOI (Department of the Interior) DOE (Department of Energy)	$3,445,401	0.7%	Rank history: #29 in FY2022, #46 in FY2023, #78 in FY2024 and #78 in FY2025; down 8 since FY2020.
23	Lanigan Holdings LLC Through Walter Payton Power Equipment LLC Top agencies Army (Department of the Army)	$3,366,393	0.7%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
24	Vantage Vehicle International, Inc. Top agencies DLA (Defense Logistics Agency)	$3,070,743	0.6%	Rank history: #36 in FY2022, #24 in FY2023, not on the FY2024 list and #37 in FY2025; up 86 since FY2020.
25	The Akana Group Inc. Top agencies DOI (Department of the Interior) Army (Department of the Army) VA (Department of Veterans Affairs)	$3,060,040	0.6%	Rank history: #24 in FY2022, #19 in FY2023, #30 in FY2024 and #96 in FY2025; up 1 since FY2020.
26	Advanced Material Handling LLC Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$2,806,640	0.6%	Rank history: #19 in FY2022, #17 in FY2023, #28 in FY2024 and #17 in FY2025; down 8 since FY2020.
27	Navistar International Corporation Through ND Defense LLC Top agencies DLA (Defense Logistics Agency)	$2,746,749	0.6%	Rank history: #16 in FY2022, #11 in FY2023, #10 in FY2024 and not on the FY2025 list; up 49 since FY2020.
28	Skymark Refuelers LLC Top agencies DLA (Defense Logistics Agency)	$2,368,985	0.5%	Rank history: #30 in FY2022, #27 in FY2023, #11 in FY2024 and #61 in FY2025; new, not ranked in FY2020.
29	Appleton Marine Inc. Top agencies Army (Department of the Army)	$2,135,966	0.4%	Rank history: not on the FY2022–FY2025 lists; up 383 since FY2020.
30	Huntsville Tractor & Equipment Inc. Top agencies USAF (Department of the Air Force) VA (Department of Veterans Affairs) DOJ (Department of Justice)	$1,971,318	0.4%	Rank history: #25 in FY2022, #21 in FY2023, #34 in FY2024 and #27 in FY2025; up 6 since FY2020.
31	Maryland Industrial Trucks, Incorporated Top agencies DLA (Defense Logistics Agency)	$1,833,766	0.4%	Rank history: #40 in FY2022, #82 in FY2023, #36 in FY2024 and #46 in FY2025; new, not ranked in FY2020.
32	Easy Street Jd&S, LLC Top agencies DLA (Defense Logistics Agency)	$1,800,724	0.4%	Rank history: not on the FY2022 list, #25 in FY2023 and not on the FY2024–FY2025 lists; up 34 since FY2020.
33	Terex Corporation Top agencies Army (Department of the Army)	$1,372,885	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
34	Atmax Equipment Co. Top agencies DOI (Department of the Interior)	$1,325,740	0.3%	Rank history: not on the FY2022 list, #79 in FY2023, #99 in FY2024 and #94 in FY2025; up 99 since FY2020.
35	Doosan Infracore Co., Ltd. 2 awardees, including Doosan Bobcat North America, Inc. Top agencies DOI (Department of the Interior) DLA (Defense Logistics Agency) HHS (Department of Health and Human Services)	$1,259,954	0.3%	Rank history: #55 in FY2022, #61 in FY2023 and not on the FY2024–FY2025 lists; up 5 since FY2020.
36	Indian Eyes, LLC Top agencies DOI (Department of the Interior) USDA (Department of Agriculture)	$1,166,426	0.2%	Rank history: not on the FY2022–FY2025 lists; up 9 since FY2020.
37	Ameramex International, Inc. Top agencies Army (Department of the Army)	$1,132,050	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
38	Chelshua Corp Top agencies USAF (Department of the Air Force) DOI (Department of the Interior)	$1,051,473	0.2%	Rank history: not on the FY2022–FY2025 lists; up 34 since FY2020.
39	Enrgies Inc. Top agencies USAF (Department of the Air Force)	$950,000	0.2%	Rank history: #27 in FY2022, #28 in FY2023, #27 in FY2024 and #25 in FY2025; new, not ranked in FY2020.
40	Cargotec OYJ Through Independent Rough Terrain Center LLC Top agencies DLA (Defense Logistics Agency) GSA (General Services Administration)	$918,596	0.2%	Rank history: #26 in FY2022, #29 in FY2023, #74 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
41	Kifco, Inc. Top agencies USDA (Department of Agriculture)	$917,302	0.2%	Rank history: not on the FY2022 list, #45 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
42	Eijkelkamp North America, Inc. Top agencies DOI (Department of the Interior)	$891,950	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
43	Volkswagen AG Through ND Defense LLC Top agencies DLA (Defense Logistics Agency)	$886,302	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
44	Toyota Industries Corporation Through Hoist Material Handling, Inc. Top agencies DLA (Defense Logistics Agency)	$833,440	0.2%	Rank history: #46 in FY2022, #35 in FY2023 and not on the FY2024–FY2025 lists; down 9 since FY2020.
45	Allied Defense Industries Inc. Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$829,630	0.2%	Rank history: #54 in FY2022 and not on the FY2023–FY2025 lists; up 164 since FY2020.
46	Tymco, Inc. Top agencies DLA (Defense Logistics Agency) VA (Department of Veterans Affairs)	$801,425	0.2%	Rank history: #31 in FY2022, not on the FY2023 list, #65 in FY2024 and #74 in FY2025; up 36 since FY2020.
47	Mooweep LLC Top agencies DOI (Department of the Interior)	$797,839	0.2%	Rank history: #64 in FY2022, #40 in FY2023, #42 in FY2024 and not on the FY2025 list; up 2 since FY2020.
48	Gary W Clem Inc. Top agencies USDA (Department of Agriculture)	$781,637	0.2%	Rank history: #43 in FY2022, #39 in FY2023, #73 in FY2024 and #69 in FY2025; up 40 since FY2020.
49	Wintersteiger Inc. Top agencies USDA (Department of Agriculture)	$753,814	0.2%	Rank history: #59 in FY2022, #49 in FY2023 and not on the FY2024–FY2025 lists; up 4 since FY2020.
50	GH Cranes & Components USA Inc. Top agencies DHS (Department of Homeland Security)	$741,980	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
51	Theodor Wille Intertrade GMBH Through Atlantic Diving Supply, Inc. Top agencies DLA (Defense Logistics Agency) USDA (Department of Agriculture)	$702,201	0.1%	Rank history: #91 in FY2022 and not on the FY2023–FY2025 lists; up 17 since FY2020.
52	Gaithersburg Farmers Supply, Inc. Top agencies DLA (Defense Logistics Agency) VA (Department of Veterans Affairs) Navy (Department of the Navy)	$653,345	0.1%	Rank history: #48 in FY2022, #36 in FY2023, #47 in FY2024 and #23 in FY2025; down 11 since FY2020.
53	Garsite / Progress LLC Top agencies DLA (Defense Logistics Agency)	$609,868	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
54	AMG Company, Inc. Top agencies DOI (Department of the Interior)	$572,364	0.1%	Rank history: not on the FY2022–FY2025 lists; up 88 since FY2020.
55	Iveco SUD-West Nutzfahrzeuge GMBH 2 awardees, including CNH Industrial America LLC and Iveco Sued - West Nutzfahrzeuge GMBH Top agencies DOI (Department of the Interior) Army (Department of the Army) DLA (Defense Logistics Agency)	$564,473	0.1%	Rank history: not on the FY2022–FY2025 lists; up 10 since FY2020.
56	Blastrac N.a. Inc. Through Bard Holdings NA, Inc. Top agencies DLA (Defense Logistics Agency)	$555,430	0.1%	Rank history: not on the FY2022 list, #70 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
57	Steen Enterprises Inc. Top agencies DHS (Department of Homeland Security) Army (Department of the Army) USDA (Department of Agriculture)	$552,953	0.1%	Rank history: not on the FY2022 list, #74 in FY2023, #96 in FY2024 and not on the FY2025 list; down 25 since FY2020.
58	Advantix Engineering Corp Top agencies USDA (Department of Agriculture)	$543,957	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
59	Parts Life Inc. Through Deval Life Cycle Support LLC Top agencies DLA (Defense Logistics Agency)	$542,736	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
60	Zurn USA Inc. Top agencies USDA (Department of Agriculture)	$515,452	0.1%	Rank history: not on the FY2022 list, #97 in FY2023 and not on the FY2024–FY2025 lists; up 35 since FY2020.
61	Tracey Road Equipment, Inc. Top agencies Army (Department of the Army)	$482,514	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
62	Kampi Components Co Inc. Top agencies DLA (Defense Logistics Agency)	$481,170	0.1%	Rank history: not on the FY2022–FY2024 lists and #87 in FY2025; up 113 since FY2020.
63	Melton Sales & Service Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$475,531	0.1%	Rank history: not on the FY2022–FY2025 lists; down 26 since FY2020.
64	M-B Companies, Inc. Top agencies DLA (Defense Logistics Agency)	$469,826	0.1%	Rank history: not on the FY2022–FY2023 lists, #44 in FY2024 and #9 in FY2025; new, not ranked in FY2020.
65	RDO Holdings Co. 3 awardees, including RDO Equipment Co and RDO Agriculture Equipment Co Top agencies DOI (Department of the Interior) Navy (Department of the Navy) VA (Department of Veterans Affairs)	$460,264	0.1%	Rank history: not on the FY2022–FY2025 lists; up 275 since FY2020.
66	Construction Sales and Service, Inc. Top agencies USAF (Department of the Air Force) DOI (Department of the Interior) DOE (Department of Energy)	$452,344	0.1%	Rank history: not on the FY2022–FY2025 lists; up 18 since FY2020.
67	BIK & Vtechsaar GMBH Top agencies USAF (Department of the Air Force)	$430,352	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
68	Trius, Inc. Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force)	$405,762	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
69	Menzi Muck USA Inc. Top agencies DHS (Department of Homeland Security)	$400,006	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
70	Logistics365 Inc. Top agencies Army (Department of the Army) DLA (Defense Logistics Agency) USDA (Department of Agriculture)	$395,404	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
71	Amplifiedag Technologies LLC Top agencies USDA (Department of Agriculture)	$393,500	0.1%	Rank history: #34 in FY2022, #99 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
72	Atta Al-Firdows Company Top agencies Army (Department of the Army)	$382,641	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
73	DCI Inc. Top agencies USAF (Department of the Air Force)	$363,562	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
74	Government Contracts, LLC Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$362,113	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
75	Ronald Bryan JR Top agencies Army (Department of the Army)	$357,344	0.1%	Rank history: not on the FY2022–FY2025 lists; up 357 since FY2020.
76	Landoll Company, LLC Top agencies DLA (Defense Logistics Agency)	$350,528	0.1%	Rank history: not on the FY2022–FY2023 lists, #48 in FY2024 and #31 in FY2025; up 91 since FY2020.
77	RCI Engineering LLC Top agencies USDA (Department of Agriculture)	$347,813	0.1%	Rank history: #95 in FY2022 and not on the FY2023–FY2025 lists; up 120 since FY2020.
78	Grove U.s. LLC Top agencies DLA (Defense Logistics Agency) Army (Department of the Army) GSA (General Services Administration)	$340,481	0.1%	Rank history: not on the FY2022–FY2025 lists; down 51 since FY2020.
79	CSE Corporation Top agencies DOL (Department of Labor)	$336,344	0.1%	Rank history: not on the FY2022–FY2025 lists; up 124 since FY2020.
80	Kato Works Co. Ltd. Top agencies Navy (Department of the Navy)	$333,570	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
81	Xcorp Top agencies Army (Department of the Army)	$333,559	0.1%	Rank history: not on the FY2022–FY2025 lists; down 37 since FY2020.
82	Renu Robotics Corp Top agencies USAF (Department of the Air Force)	$332,170	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
83	Air Burners, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$319,997	0.1%	Rank history: not on the FY2022 list, #51 in FY2023, #59 in FY2024 and not on the FY2025 list; up 29 since FY2020.
84	Ecology Mir Group LLC Top agencies Army (Department of the Army)	$317,520	0.1%	Rank history: not on the FY2022–FY2025 lists; up 51 since FY2020.
85	Futurebud International Co., Ltd. Top agencies Navy (Department of the Navy)	$313,980	0.1%	Rank history: #76 in FY2022 and not on the FY2023–FY2025 lists; down 26 since FY2020.
86	Kipper Tool Company Top agencies DLA (Defense Logistics Agency) USDA (Department of Agriculture) DOJ (Department of Justice)	$307,125	0.1%	Rank history: not on the FY2022–FY2025 lists; down 74 since FY2020.
87	Big Top Manufacturing LLC Top agencies Navy (Department of the Navy)	$298,700	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
88	Sunsouth LLC 3 awardees Top agencies USAF (Department of the Air Force) Army (Department of the Army) USDA (Department of Agriculture)	$297,851	0.1%	Rank history: not on the FY2022–FY2025 lists; down 10 since FY2020.
89	Lummus Corporation Top agencies USDA (Department of Agriculture)	$292,200	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
90	Fecon, LLC Top agencies Army (Department of the Army) DOE (Department of Energy)	$291,231	0.1%	Rank history: #90 in FY2022 and not on the FY2023–FY2025 lists; down 47 since FY2020.
91	Clark Equipment Company Through Doosan Bobcat North America, Inc. Top agencies DOI (Department of the Interior) USDA (Department of Agriculture) DOJ (Department of Justice)	$290,625	0.1%	Rank history: #67 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
92	Jarraff Industries, Inc. Top agencies DOE (Department of Energy)	$289,977	0.1%	Rank history: not on the FY2022–FY2025 lists; up 23 since FY2020.
93	Casa Comercial Mathews SA De CV Top agencies Army (Department of the Army)	$288,650	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
94	Aantilia LLC Top agencies DOI (Department of the Interior) USDA (Department of Agriculture) USAF (Department of the Air Force)	$284,531	0.1%	Rank history: #41 in FY2022, #42 in FY2023, #52 in FY2024 and #39 in FY2025; down 25 since FY2020.
95	Akrs Equipment Solutions, Inc. Top agencies USDA (Department of Agriculture)	$282,459	0.1%	Rank history: not on the FY2022–FY2025 lists; up 76 since FY2020.
96	Saba Group International General Trading & Contracting Company W.L.L. Top agencies Army (Department of the Army)	$277,846	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
97	Capital Tractor Inc. Top agencies USAF (Department of the Air Force) USDA (Department of Agriculture)	$274,291	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
98	Juliet Construction, LLC Top agencies VA (Department of Veterans Affairs)	$271,425	0.1%	Rank history: not on the FY2022–FY2025 lists; up 29 since FY2020.
99	B & H International LLC Top agencies VA (Department of Veterans Affairs)	$269,223	0.1%	Rank history: not on the FY2022–FY2025 lists; up 109 since FY2020.
100	Technology International Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) DOI (Department of the Interior)	$265,097	0.1%	Rank history: not on the FY2022–FY2025 lists; up 56 since FY2020.

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100 of 595 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 3331

Code	Net obligations	Largest contractor
33312 Construction Machinery Manufacturing	$424,085,996	Caterpillar Inc.
33311 Agricultural Implement Manufacturing	$38,480,492	Bravo, Inc.
33313 Mining and Oil and Gas Field Machinery Manufacturing	$3,835,317	Eijkelkamp North America, 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 $481 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 NAICS 3331 contractors in FY2021?

1. Caterpillar Inc. ($110M), 2. JCB Inc. ($33.8M), 3. American Material Handling, Inc. ($28.9M), 4. Polaris Industries Inc. ($21.4M), 5. Certified Stainless Service Inc. ($19.2M), 6. The Manitowoc Company. Inc. ($19.2M), 7. Globe Trailer Manufacturing, Inc. ($18.9M), 8. Deere & Company ($16.2M), 9. Oshkosh Corp ($13.7M), 10. AB Volvo ($12.1M).

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