Top 100 Contractors in NAICS 335312: Motor and Generator Manufacturing, FY2021

Name: Top 100 Contractors in NAICS 335312: Motor and Generator Manufacturing, FY2021
Creator: GovTribe

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

The top 10 won 60% of FY2021 NAICS 335312 contract dollars

Contract obligations: $344,837,235 Net of deobligations, by contracts coded NAICS 335312
Contractors: 726 Parent companies with an obligation
Largest contractor: Cummins Inc. $102 million, 28.2% 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	Cummins Inc. 12 awardees, including Cummins Power Generation Inc. and Cummins Crosspoint LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) DOI (Department of the Interior)	$101,572,793	28.2%	Rank history: #1 in FY2022, #2 in FY2023, #8 in FY2024 and #23 in FY2025; unchanged since FY2020.
2	PD Power Systems, LLC Top agencies Army (Department of the Army)	$42,667,958	11.8%	Rank history: #6 in FY2022, #7 in FY2023, #2 in FY2024 and #1 in FY2025; new, not ranked in FY2020.
3	Kohler Co. 2 awardees Top agencies DOT (Department of Transportation) Commerce (Department of Commerce) DOI (Department of the Interior)	$16,358,306	4.5%	Rank history: #2 in FY2022, #6 in FY2023 and not on the FY2024–FY2025 lists; up 2 since FY2020.
4	Andritz AG 3 awardees, including Andritz Hydro Corp, Graebener Press Systems, Inc. and Andritz Schuler Incorporated Top agencies Army (Department of the Army) Treasury (Department of the Treasury)	$11,646,864	3.2%	Rank history: #36 in FY2022, not on the FY2023 list, #83 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
5	L3Harris Technologies, Inc. 10 awardees, including L3 Technologies, Inc., L3Harris Maritime Power & Energy Solutions, Inc. and Emcore Space & Navigation LLC Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$9,687,990	2.7%	Rank history: #25 in FY2022, #19 in FY2023, #4 in FY2024 and not on the FY2025 list; up 42 since FY2020.
6	C&C Power Solutions, LLC Top agencies Navy (Department of the Navy)	$9,487,165	2.6%	Rank history: not on the FY2022–FY2025 lists; down 2 since FY2020.
7	ECI Defense Group, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$8,441,111	2.3%	Rank history: #14 in FY2022, #11 in FY2023, #12 in FY2024 and #10 in FY2025; up 7 since FY2020.
8	Transdigm Group Incorporated 9 awardees, including Skurka Aerospace Inc., Aerocontrolex Group, Inc. and Champion Aerospace LLC Top agencies Army (Department of the Army) DLA (Defense Logistics Agency) Navy (Department of the Navy)	$6,244,609	1.7%	Rank history: #7 in FY2022, #18 in FY2023 and not on the FY2024–FY2025 lists; up 14 since FY2020.
9	General Electric Company 6 awardees, including GE Energy Power Conversion Naval Systems Inc., GE Energy Power Conversion USA Inc. and GE Aviation Systems LLC Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security) DLA (Defense Logistics Agency)	$6,100,404	1.7%	Rank history: #11 in FY2022, #10 in FY2023, #11 in FY2024 and #8 in FY2025; down 7 since FY2020.
10	Inglett & Stubbs International LLC Top agencies DHS (Department of Homeland Security)	$5,703,685	1.6%	Rank history: #93 in FY2022, #30 in FY2023 and not on the FY2024–FY2025 lists; down 7 since FY2020.
11	Toshiba Corporation Through Toshiba America Energy Systems Corporation Top agencies DOI (Department of the Interior)	$4,543,517	1.3%	Rank history: not on the FY2022–FY2025 lists; up 8 since FY2020.
12	Government of Canada Through Canadian Commercial Corporation Top agencies Army (Department of the Army) Navy (Department of the Navy)	$4,419,480	1.2%	Rank history: #21 in FY2022, #22 in FY2023, #34 in FY2024 and not on the FY2025 list; down 4 since FY2020.
13	Kampi Components Co Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$4,067,889	1.1%	Rank history: #17 in FY2022, #15 in FY2023, #19 in FY2024 and #19 in FY2025; up 20 since FY2020.
14	PD Systems, LLC Top agencies Army (Department of the Army)	$3,641,914	1.0%	Rank history: not on the FY2022–FY2025 lists; down 8 since FY2020.
15	Jenoptik AG Through Vincorion Power Systems GMBH Top agencies Army (Department of the Army)	$3,628,800	1.0%	Rank history: #31 in FY2022 and not on the FY2023–FY2025 lists; up 207 since FY2020.
16	Native Instinct LLC Top agencies DHS (Department of Homeland Security) VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$3,608,941	1.0%	Rank history: #26 in FY2022 and not on the FY2023–FY2025 lists; up 20 since FY2020.
17	Louis Allis LLC Top agencies DHS (Department of Homeland Security) Navy (Department of the Navy) DLA (Defense Logistics Agency)	$3,516,066	1.0%	Rank history: #64 in FY2022 and not on the FY2023–FY2025 lists; up 28 since FY2020.
18	Curtiss-Wright Corporation 3 awardees, including Curtiss-Wright Electro-Mechanical Corporation and Exlar Corporation Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$3,188,837	0.9%	Rank history: #5 in FY2022, #3 in FY2023, #29 in FY2024 and not on the FY2025 list; down 6 since FY2020.
19	General Dynamics Corporation 5 awardees, including General Dynamics-Ots, Inc., Electric Boat Corporation and General Dynamics Motion Control LLC Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$3,157,707	0.9%	Rank history: #18 in FY2022, #36 in FY2023, #33 in FY2024 and not on the FY2025 list; down 10 since FY2020.
20	Mohammed Abdulrahman Al-Bahar & Sons Top agencies Army (Department of the Army)	$2,693,262	0.7%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
21	Hansome Energy Systems Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$2,441,965	0.7%	Rank history: #44 in FY2022, #16 in FY2023, #9 in FY2024 and #9 in FY2025; up 7 since FY2020.
22	C E Niehoff & Co Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$2,374,451	0.7%	Rank history: not on the FY2022 list, #63 in FY2023, not on the FY2024 list and #24 in FY2025; up 227 since FY2020.
23	Essex Electro Engineers Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$2,325,725	0.6%	Rank history: #29 in FY2022, #5 in FY2023, #7 in FY2024 and #6 in FY2025; up 20 since FY2020.
24	Aviation Ground Equipment Corp Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration)	$2,253,046	0.6%	Rank history: #28 in FY2022, #4 in FY2023, #5 in FY2024 and not on the FY2025 list; unchanged since FY2020.
25	Hunter Defense Technolog Through HDT Expeditionary Systems Inc. Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$2,203,219	0.6%	Rank history: not on the FY2022 list, #24 in FY2023, #41 in FY2024 and not on the FY2025 list; up 52 since FY2020.
26	Fairbanks Morse LLC 3 awardees, including Ward Leonard CT LLC Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security)	$2,192,829	0.6%	Rank history: #81 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
27	RTX Corporation 8 awardees, including Raytheon Company, Goodrich Corporation and Hamilton Sundstrand Corporation Top agencies DLA (Defense Logistics Agency) Army (Department of the Army)	$2,115,751	0.6%	Rank history: #15 in FY2022, #26 in FY2023 and not on the FY2024–FY2025 lists; down 4 since FY2020.
28	AKS Industries Inc. Top agencies NGA (Department of Defense National Geospatial Intelligence Agency) OSD (Office of the Secretary of Defense) VA (Department of Veterans Affairs)	$1,824,816	0.5%	Rank history: not on the FY2022–FY2025 lists; up 168 since FY2020.
29	Triman Industries Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) USAF (Department of the Air Force)	$1,750,527	0.5%	Rank history: #13 in FY2022, #21 in FY2023, #16 in FY2024 and #12 in FY2025; up 12 since FY2020.
30	Moog Inc. 4 awardees Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force) Navy (Department of the Navy)	$1,707,268	0.5%	Rank history: #12 in FY2022, #17 in FY2023, #18 in FY2024 and #11 in FY2025; down 15 since FY2020.
31	Ares Energy LP Top agencies Army (Department of the Army)	$1,622,533	0.5%	Rank history: not on the FY2022–FY2025 lists; up 20 since FY2020.
32	S I T Corporation Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$1,233,110	0.3%	Rank history: not on the FY2022–FY2023 lists, #71 in FY2024 and not on the FY2025 list; up 71 since FY2020.
33	H R Wallingford Group Ltd Through HR Wallingford Limited Top agencies Army (Department of the Army)	$1,187,040	0.3%	Rank history: not on the FY2022–FY2025 lists; up 84 since FY2020.
34	Ampco-Pittsburgh Corporation Through Air & Liquid Systems Corporation Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$1,057,250	0.3%	Rank history: #77 in FY2022 and not on the FY2023–FY2025 lists; up 37 since FY2020.
35	OM Group Inc. Through Eaglepicher Technologies LLC Top agencies Navy (Department of the Navy)	$1,056,516	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
36	D.p. Brown of Pennsylvania, Corp Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$1,014,359	0.3%	Rank history: #48 in FY2022, #40 in FY2023, #91 in FY2024 and #77 in FY2025; up 22 since FY2020.
37	Brighton Cromwell LLC Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) USAF (Department of the Air Force)	$981,270	0.3%	Rank history: not on the FY2022–FY2025 lists; up 98 since FY2020.
38	Caterpillar Inc. Top agencies DOT (Department of Transportation) DHS (Department of Homeland Security)	$962,307	0.3%	Rank history: #9 in FY2022 and not on the FY2023–FY2025 lists; up 15 since FY2020.
39	Lektron Inc. Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$924,598	0.3%	Rank history: #47 in FY2022, #39 in FY2023, not on the FY2024 list and #17 in FY2025; up 44 since FY2020.
40	American Engineering Corporation Top agencies Navy (Department of the Navy)	$919,921	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
41	Potomac Electric Corp Top agencies Army (Department of the Army) DOT (Department of Transportation)	$813,830	0.2%	Rank history: #40 in FY2022, #34 in FY2023, not on the FY2024 list and #49 in FY2025; up 127 since FY2020.
42	Ultra Electronics Forensic Technology Inc Through Ems Development Corporation Top agencies Navy (Department of the Navy)	$788,867	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
43	Colfax Corporation Through Howden American Fan Company Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$785,673	0.2%	Rank history: not on the FY2022–FY2025 lists; up 1 since FY2020.
44	Windward Enterprises, LLC Top agencies DLA (Defense Logistics Agency)	$770,518	0.2%	Rank history: #87 in FY2022, #35 in FY2023, #90 in FY2024 and #69 in FY2025; down 6 since FY2020.
45	Toyota Gibraltar Stockholdings Ltd Top agencies DOS (Department of State) HHS (Department of Health and Human Services)	$769,995	0.2%	Rank history: not on the FY2022–FY2025 lists; up 338 since FY2020.
46	Electric Motor and Contracting Company Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security)	$732,746	0.2%	Rank history: #63 in FY2022, #52 in FY2023 and not on the FY2024–FY2025 lists; up 28 since FY2020.
47	Harnish Group Inc. Through N C Power Systems Co. Top agencies Navy (Department of the Navy)	$722,783	0.2%	Rank history: #41 in FY2022 and not on the FY2023–FY2025 lists; up 17 since FY2020.
48	Lasting Success Company Top agencies Army (Department of the Army)	$719,900	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
49	Jamaica Bearings Co., Inc. Top agencies DLA (Defense Logistics Agency)	$718,747	0.2%	Rank history: #32 in FY2022, #58 in FY2023, #27 in FY2024 and #21 in FY2025; up 35 since FY2020.
50	Meggitt PLC 3 awardees, including Meggitt North Hollywood Inc. and Meggitt (Orange County), Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$700,135	0.2%	Rank history: #82 in FY2022 and not on the FY2023–FY2025 lists; up 48 since FY2020.
51	JA Moody LLC 2 awardees, including ESI Acquisition Corp Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$696,997	0.2%	Rank history: not on the FY2022–FY2024 lists and #62 in FY2025; up 116 since FY2020.
52	Calnetix, Inc. Through Calnetix Technologies LLC Top agencies NASA (National Aeronautics and Space Administration)	$662,929	0.2%	Rank history: #74 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
53	Dimo Corp Top agencies DLA (Defense Logistics Agency)	$637,913	0.2%	Rank history: not on the FY2022–FY2025 lists; up 89 since FY2020.
54	Pioneer Industries, LLC Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$607,760	0.2%	Rank history: #70 in FY2022, #51 in FY2023, #39 in FY2024 and #67 in FY2025; down 12 since FY2020.
55	Norcom Integrated Systems Inc. Top agencies DOI (Department of the Interior)	$592,760	0.2%	Rank history: not on the FY2022–FY2025 lists; up 296 since FY2020.
56	BBA Aviation PLC Through Ontic Engineering & Manufacturing, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$590,230	0.2%	Rank history: #39 in FY2022, #55 in FY2023, #32 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
57	Jo-Kell Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$574,749	0.2%	Rank history: #16 in FY2022, #97 in FY2023, #51 in FY2024 and #37 in FY2025; down 37 since FY2020.
58	H.o. Penn Machinery Company, Inc. Top agencies VA (Department of Veterans Affairs)	$551,302	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
59	Howe Machine & Tool Corp. Top agencies DLA (Defense Logistics Agency)	$550,505	0.2%	Rank history: #43 in FY2022 and not on the FY2023–FY2025 lists; up 8 since FY2020.
60	Integrated Applied Science, LLC Top agencies Army (Department of the Army)	$536,151	0.1%	Rank history: #68 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
61	Integrated Procurement Technologies Top agencies DLA (Defense Logistics Agency)	$523,659	0.1%	Rank history: not on the FY2022–FY2025 lists; up 89 since FY2020.
62	Motion Control Systems Inc. Top agencies Navy (Department of the Navy)	$518,026	0.1%	Rank history: #58 in FY2022, not on the FY2023–FY2024 lists and #99 in FY2025; up 237 since FY2020.
63	Ray Land, Inc. Top agencies DHS (Department of Homeland Security)	$498,402	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
64	Generac Power Systems Inc. 2 awardees, including Generac Mobile Products, LLC Top agencies USDA (Department of Agriculture) USAF (Department of the Air Force) DOS (Department of State)	$493,315	0.1%	Rank history: #56 in FY2022 and not on the FY2023–FY2025 lists; up 25 since FY2020.
65	Jag Components, LLC Top agencies DLA (Defense Logistics Agency)	$478,388	0.1%	Rank history: not on the FY2022–FY2025 lists; up 57 since FY2020.
66	Controlled Systems Sales Company Top agencies USAF (Department of the Air Force)	$468,488	0.1%	Rank history: not on the FY2022–FY2025 lists; up 193 since FY2020.
67	Federal Contracts LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) VA (Department of Veterans Affairs)	$459,972	0.1%	Rank history: #55 in FY2022, #53 in FY2023 and not on the FY2024–FY2025 lists; up 60 since FY2020.
68	Howden American Fan Company Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$458,318	0.1%	Rank history: #34 in FY2022, #28 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
69	Farmville Wholesale Electric Supply Co Inc. Top agencies DLA (Defense Logistics Agency)	$452,231	0.1%	Rank history: #54 in FY2022, #54 in FY2023, #45 in FY2024 and #70 in FY2025; up 92 since FY2020.
70	Adirondack Electronics Inc. Top agencies Navy (Department of the Navy)	$451,244	0.1%	Rank history: not on the FY2022 list, #82 in FY2023 and not on the FY2024–FY2025 lists; down 20 since FY2020.
71	Wood Environment & Infrastructure Solutions Inc. Through Ethosenergy Accessories and Components, LLC Top agencies Navy (Department of the Navy)	$428,400	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
72	Turbine Technics Inc. Top agencies Navy (Department of the Navy)	$413,608	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
73	Americas Generators, Inc. Top agencies USAF (Department of the Air Force) DOI (Department of the Interior)	$411,016	0.1%	Rank history: not on the FY2022 list, #85 in FY2023 and not on the FY2024–FY2025 lists; up 194 since FY2020.
74	Painter Tool Incorporated Top agencies Navy (Department of the Navy)	$407,740	0.1%	Rank history: not on the FY2022–FY2025 lists; up 70 since FY2020.
75	Woodward Governor Company 4 awardees, including MPC Products Corporation and Woodward, Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency) Army (Department of the Army)	$403,249	0.1%	Rank history: #85 in FY2022, #25 in FY2023 and not on the FY2024–FY2025 lists; down 46 since FY2020.
76	R & M Government Services Inc. Top agencies DLA (Defense Logistics Agency)	$390,400	0.1%	Rank history: not on the FY2022–FY2025 lists; down 10 since FY2020.
77	S.e.t.i Jordan Ltd. Top agencies USAF (Department of the Air Force)	$389,600	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
78	General Transportation & Equi Pment Co Top agencies USAF (Department of the Air Force)	$382,385	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
79	Dela Technology Corporation Top agencies DLA (Defense Logistics Agency)	$354,802	0.1%	Rank history: not on the FY2022 list, #93 in FY2023 and not on the FY2024–FY2025 lists; up 95 since FY2020.
80	Peerless Electronics Inc. Top agencies DLA (Defense Logistics Agency)	$352,275	0.1%	Rank history: not on the FY2022 list, #46 in FY2023, #53 in FY2024 and #42 in FY2025; up 68 since FY2020.
81	Elmo Motion Control Limited Top agencies DLA (Defense Logistics Agency)	$341,370	0.1%	Rank history: not on the FY2022–FY2025 lists; up 91 since FY2020.
82	The Aeronautical Instrument and Radio Company Top agencies DLA (Defense Logistics Agency)	$339,106	0.1%	Rank history: not on the FY2022–FY2025 lists; up 215 since FY2020.
83	Quinn Group Inc. 2 awardees, including Quinn Company Top agencies Navy (Department of the Navy)	$328,354	0.1%	Rank history: not on the FY2022–FY2025 lists; down 23 since FY2020.
84	Rewind Specialties, Inc. Top agencies DLA (Defense Logistics Agency)	$321,840	0.1%	Rank history: not on the FY2022–FY2025 lists; up 114 since FY2020.
85	Government Scientific Source Inc. Top agencies Army (Department of the Army) HHS (Department of Health and Human Services)	$319,193	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
86	Coffman Electrical Equipment Co. Top agencies DOE (Department of Energy) VA (Department of Veterans Affairs) DLA (Defense Logistics Agency)	$316,289	0.1%	Rank history: not on the FY2022–FY2025 lists; up 144 since FY2020.
87	Dynamic Air Engineering, Inc. Top agencies DLA (Defense Logistics Agency)	$315,438	0.1%	Rank history: not on the FY2022–FY2025 lists; up 44 since FY2020.
88	B&R Construction Services, LLC Top agencies Treasury (Department of the Treasury)	$305,283	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
89	BAE Systems PLC 2 awardees, including BAE Systems Controls Inc. Top agencies Navy (Department of the Navy)	$302,164	0.1%	Rank history: not on the FY2022 list, #32 in FY2023 and not on the FY2024–FY2025 lists; down 52 since FY2020.
90	Northrop Grumman Corporation 4 awardees, including Northrop Grumman Systems Corporation Top agencies Navy (Department of the Navy)	$299,155	0.1%	Rank history: #83 in FY2022, not on the FY2023 list, #30 in FY2024 and #29 in FY2025; up 76 since FY2020.
91	Argo Turboserve Corporation Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$293,411	0.1%	Rank history: not on the FY2022 list, #84 in FY2023, #78 in FY2024 and not on the FY2025 list; up 67 since FY2020.
92	Crane Co 3 awardees, including Hydro-Aire Aerospace Corp and Eldec Aerospace Corp Top agencies DLA (Defense Logistics Agency)	$282,847	0.1%	Rank history: #35 in FY2022 and not on the FY2023–FY2025 lists; up 5 since FY2020.
93	Schaeffler Group USA Inc Through Schaeffler Aerospace USA Corp Top agencies Navy (Department of the Navy)	$280,188	0.1%	Rank history: not on the FY2022–FY2025 lists; up 163 since FY2020.
94	Polytech Defense Spares LLC Top agencies DLA (Defense Logistics Agency)	$278,332	0.1%	Rank history: #80 in FY2022, #96 in FY2023, #40 in FY2024 and #27 in FY2025; down 22 since FY2020.
95	Har-Per Sales Solutions Inc. Top agencies USAF (Department of the Air Force)	$277,557	0.1%	Rank history: not on the FY2022–FY2025 lists; up 342 since FY2020.
96	Dreamfind, Inc. Top agencies DLA (Defense Logistics Agency)	$271,946	0.1%	Rank history: not on the FY2022–FY2025 lists; up 86 since FY2020.
97	New Galaxy Air Conditioning and Refrigeration W.L.L. Top agencies USAF (Department of the Air Force)	$269,370	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
98	Pht Aerospace LLC Top agencies DLA (Defense Logistics Agency)	$266,075	0.1%	Rank history: #45 in FY2022, #65 in FY2023, #65 in FY2024 and not on the FY2025 list; up 97 since FY2020.
99	Arc Systems Inc. Top agencies DLA (Defense Logistics Agency) Army (Department of the Army)	$265,550	0.1%	Rank history: not on the FY2022 list, #79 in FY2023, not on the FY2024 list and #91 in FY2025; up 82 since FY2020.
100	Cobham Advanced Electron 3 awardees, including Cobham Exeter, Inc., Mission Systems Davenport Inc. and Frontgrade Technologies Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency) NASA (National Aeronautics and Space Administration)	$263,958	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.

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100 of 726 contractors listed here. See the rest on GovTribe.

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 $360 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 335312 contractors in FY2021?

1. Cummins Inc. ($102M), 2. PD Power Systems, LLC ($42.7M), 3. Kohler Co. ($16.4M), 4. Andritz AG ($11.6M), 5. L3Harris Technologies, Inc. ($9.69M), 6. C&C Power Solutions, LLC ($9.49M), 7. ECI Defense Group, Inc. ($8.44M), 8. Transdigm Group Incorporated ($6.24M), 9. General Electric Company ($6.1M), 10. Inglett & Stubbs International LLC ($5.7M).

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