Top 100 Contractors in NAICS 333415: Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing, FY2021

Name: Top 100 Contractors in NAICS 333415: Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing, FY2021
Creator: GovTribe

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

The top 10 won 48% of FY2021 NAICS 333415 contract dollars

Contract obligations: $202,150,257 Net of deobligations, by contracts coded NAICS 333415
Contractors: 808 Parent companies with an obligation
Largest contractor: DCM Clean Air Products, Inc. $44.8 million, 21.6% 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	DCM Clean Air Products, Inc. Top agencies DLA (Defense Logistics Agency)	$44,809,745	21.6%	Rank history: #2 in FY2022, #1 in FY2023 and not on the FY2024–FY2025 lists; up 1 since FY2020.
2	Johnson Controls Security Solutions LLC 10 awardees, including Johnson Controls Navy Systems, LLC, Johnson Controls, Inc. and Johnson Controls Industries Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency) DOJ (Department of Justice)	$9,650,625	4.6%	Rank history: #5 in FY2022, #4 in FY2023, #6 in FY2024 and not on the FY2025 list; up 5 since FY2020.
3	Tyonek Native Corporatio 2 awardees, including Tfab Defense Systems LLC Top agencies Army (Department of the Army)	$8,722,725	4.2%	Rank history: #16 in FY2022, #9 in FY2023, #42 in FY2024 and not on the FY2025 list; up 25 since FY2020.
4	Virginia Energy and Lighting, LLC Top agencies DISA (Defense Information Systems Agency)	$7,621,688	3.7%	Rank history: #100 in FY2022 and not on the FY2023–FY2025 lists; up 65 since FY2020.
5	Hunter Defense Technolog 2 awardees, including HDT Expeditionary Systems Inc. and Berg Manufacturing, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$7,503,616	3.6%	Rank history: #1 in FY2022, #3 in FY2023 and not on the FY2024–FY2025 lists; down 4 since FY2020.
6	Leonardo S.p.A. 3 awardees, including Engineered Coil Company and Laurel Technologies Partnership Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) DHS (Department of Homeland Security)	$6,327,265	3.0%	Rank history: #7 in FY2022, #19 in FY2023, #5 in FY2024 and #5 in FY2025; down 2 since FY2020.
7	Honeywell International Inc. 3 awardees, including Honeywell Inc. and Honeywell Building Solutions GMBH Top agencies HUD (Department of Housing and Urban Development) USAF (Department of the Air Force) Army (Department of the Army)	$6,299,366	3.0%	Rank history: #6 in FY2022, #6 in FY2023, #2 in FY2024 and #33 in FY2025; down 2 since FY2020.
8	Munters Corporation Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) Army (Department of the Army)	$2,913,337	1.4%	Rank history: not on the FY2022–FY2025 lists; up 3 since FY2020.
9	Snowbird Environmental Systems Corporation Through Snowbird Technologies Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$2,896,986	1.4%	Rank history: #22 in FY2022, #14 in FY2023, #92 in FY2024 and not on the FY2025 list; up 8 since FY2020.
10	Pergravis Mission Critical Construction, LLC Top agencies DISA (Defense Information Systems Agency)	$2,784,247	1.3%	Rank history: not on the FY2022 list, #94 in FY2023, #35 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
11	Clayton Associates Inc. Top agencies DLA (Defense Logistics Agency)	$2,232,734	1.1%	Rank history: #34 in FY2022, #21 in FY2023, #12 in FY2024 and #13 in FY2025; up 18 since FY2020.
12	Janels Industries Inc. Top agencies DLA (Defense Logistics Agency)	$2,195,835	1.1%	Rank history: #11 in FY2022, #12 in FY2023, #24 in FY2024 and #19 in FY2025; down 4 since FY2020.
13	Fakt-Technik GMBH Top agencies Army (Department of the Army)	$2,174,352	1.0%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
14	James A Quick Inc. Top agencies Army (Department of the Army)	$2,165,171	1.0%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
15	BBA Aviation PLC Through Ontic Engineering & Manufacturing, Inc. Top agencies DLA (Defense Logistics Agency)	$2,060,173	1.0%	Rank history: #85 in FY2022 and not on the FY2023–FY2025 lists; down 5 since FY2020.
16	Thermo Electron Corporation 6 awardees, including Fisher Scientific Company L.L.C., Thermo Orion Inc. and Thermo Fisher Scientific (Asheville) LLC Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy) Commerce (Department of Commerce)	$1,655,182	0.8%	Rank history: #31 in FY2022 and not on the FY2023–FY2025 lists; up 304 since FY2020.
17	TLD America Corporation Top agencies Navy (Department of the Navy)	$1,577,511	0.8%	Rank history: #35 in FY2022 and not on the FY2023–FY2025 lists; up 186 since FY2020.
18	Argo Turboserve Corporation Top agencies DLA (Defense Logistics Agency)	$1,549,432	0.7%	Rank history: #30 in FY2022, #17 in FY2023, #39 in FY2024 and #16 in FY2025; up 41 since FY2020.
19	Southern Aire Contracting, Inc. Top agencies DHS (Department of Homeland Security)	$1,525,114	0.7%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
20	Labrepco Inc. Top agencies HHS (Department of Health and Human Services) USDA (Department of Agriculture) USUHS (DOD Uniformed Services University of the Health Sciences)	$1,486,936	0.7%	Rank history: #15 in FY2022, #18 in FY2023 and not on the FY2024–FY2025 lists; up 33 since FY2020.
21	Fad Pennsylvania Inc. Top agencies DLA (Defense Logistics Agency)	$1,409,844	0.7%	Rank history: #76 in FY2022 and not on the FY2023–FY2025 lists; up 36 since FY2020.
22	Parker-Hannifin Corporation Top agencies DLA (Defense Logistics Agency)	$1,335,277	0.6%	Rank history: #13 in FY2022, #34 in FY2023 and not on the FY2024–FY2025 lists; up 36 since FY2020.
23	Quality Refrigeration Company, Inc. 2 awardees Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security) Commerce (Department of Commerce)	$1,317,579	0.6%	Rank history: #32 in FY2022, #44 in FY2023, #34 in FY2024 and #20 in FY2025; up 39 since FY2020.
24	Kampi Components Co Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$1,246,677	0.6%	Rank history: #36 in FY2022, #36 in FY2023, #15 in FY2024 and #23 in FY2025; unchanged since FY2020.
25	Windward Enterprises, LLC Top agencies DLA (Defense Logistics Agency)	$1,236,971	0.6%	Rank history: #64 in FY2022, #48 in FY2023, #52 in FY2024 and #28 in FY2025; up 11 since FY2020.
26	Accentz, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$1,106,788	0.5%	Rank history: #10 in FY2022, #20 in FY2023, #38 in FY2024 and #11 in FY2025; down 5 since FY2020.
27	Logis-Tech, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$1,083,265	0.5%	Rank history: #80 in FY2022, #16 in FY2023, not on the FY2024 list and #35 in FY2025; down 9 since FY2020.
28	Berkeley Building Company Top agencies Army (Department of the Army)	$1,041,180	0.5%	Rank history: #21 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
29	Percival Scientific Incorporated Top agencies USDA (Department of Agriculture) HHS (Department of Health and Human Services) EPA (Environmental Protection Agency)	$1,036,841	0.5%	Rank history: #19 in FY2022, #29 in FY2023, #28 in FY2024 and #52 in FY2025; down 9 since FY2020.
30	Binder Inc. Top agencies Navy (Department of the Navy)	$1,018,518	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
31	Brighton Cromwell LLC Top agencies DLA (Defense Logistics Agency)	$1,002,764	0.5%	Rank history: not on the FY2022–FY2025 lists; down 19 since FY2020.
32	Select Gases, LLC Top agencies HHS (Department of Health and Human Services)	$993,758	0.5%	Rank history: #24 in FY2022, not on the FY2023 list, #78 in FY2024 and not on the FY2025 list; up 56 since FY2020.
33	Howell Laboratories Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$987,802	0.5%	Rank history: #26 in FY2022, #76 in FY2023 and not on the FY2024–FY2025 lists; up 9 since FY2020.
34	Imeco Inc. 2 awardees Top agencies Navy (Department of the Navy)	$940,404	0.5%	Rank history: #38 in FY2022, #49 in FY2023 and not on the FY2024–FY2025 lists; down 21 since FY2020.
35	Megabite Electronics, Inc. Top agencies DLA (Defense Logistics Agency)	$932,770	0.4%	Rank history: #90 in FY2022 and not on the FY2023–FY2025 lists; up 12 since FY2020.
36	The RAE Corporation Top agencies DOT (Department of Transportation)	$871,241	0.4%	Rank history: #29 in FY2022, #75 in FY2023 and not on the FY2024–FY2025 lists; down 13 since FY2020.
37	Aktio Corporation Top agencies Navy (Department of the Navy)	$851,040	0.4%	Rank history: #46 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
38	Unimex Corporation Through Paragon Defense Solutions Inc. Top agencies DLA (Defense Logistics Agency)	$830,800	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
39	Cummins Inc. Top agencies DLA (Defense Logistics Agency)	$826,079	0.4%	Rank history: not on the FY2022–FY2025 lists; down 36 since FY2020.
40	Saudi Naval Support Co. Top agencies USAF (Department of the Air Force)	$825,240	0.4%	Rank history: #9 in FY2022, #28 in FY2023, #29 in FY2024 and #70 in FY2025; down 13 since FY2020.
41	Foxtrot Construction Inc. Top agencies VA (Department of Veterans Affairs)	$824,439	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
42	New Future Contracting Top agencies USAF (Department of the Air Force)	$791,863	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
43	Phoenix Systems Engineering Inc. Top agencies DLA (Defense Logistics Agency) Army (Department of the Army) DOS (Department of State)	$785,460	0.4%	Rank history: #27 in FY2022, #31 in FY2023, #86 in FY2024 and not on the FY2025 list; down 27 since FY2020.
44	Sky Creative for Trading and Contracting Company Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$774,964	0.4%	Rank history: not on the FY2022–FY2023 lists, #31 in FY2024 and #41 in FY2025; new, not ranked in FY2020.
45	Aero Specialties Inc. Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration)	$762,030	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
46	Rev-Cap Company, Inc. Top agencies DLA (Defense Logistics Agency)	$746,466	0.4%	Rank history: not on the FY2022–FY2025 lists; up 54 since FY2020.
47	Multistack LLC Top agencies DOS (Department of State) NASA (National Aeronautics and Space Administration)	$709,971	0.3%	Rank history: #60 in FY2022, #95 in FY2023 and not on the FY2024–FY2025 lists; up 31 since FY2020.
48	Adrick Marine Group, Inc. Top agencies DHS (Department of Homeland Security) Navy (Department of the Navy)	$696,071	0.3%	Rank history: #54 in FY2022, not on the FY2023 list, #57 in FY2024 and not on the FY2025 list; down 5 since FY2020.
49	Russells Technical Products Inc. Top agencies Army (Department of the Army) Commerce (Department of Commerce)	$693,621	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
50	General Dynamics Corporation 3 awardees, including Electric Boat Corporation, General Dynamics Land Systems - Canada Corporation and General Dynamics Land Systems Inc. Top agencies DLA (Defense Logistics Agency)	$676,833	0.3%	Rank history: #4 in FY2022, #2 in FY2023 and not on the FY2024–FY2025 lists; up 17 since FY2020.
51	Par Defense Industries, LLC Top agencies DLA (Defense Logistics Agency)	$668,317	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
52	Chesapeake Marine Refrigeration Corp Top agencies Navy (Department of the Navy)	$653,739	0.3%	Rank history: #74 in FY2022, not on the FY2023 list, #21 in FY2024 and #24 in FY2025; up 11 since FY2020.
53	So-Low Environmental Equipment, Co Top agencies VA (Department of Veterans Affairs) DOS (Department of State) USDA (Department of Agriculture)	$648,310	0.3%	Rank history: not on the FY2022 list, #59 in FY2023, #94 in FY2024 and not on the FY2025 list; down 38 since FY2020.
54	Johnson Controls Inc. Through Johnson Controls Building Automation Systems, LLC Top agencies Navy (Department of the Navy)	$621,146	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
55	J.t. Systems, Inc. Top agencies Navy (Department of the Navy)	$618,600	0.3%	Rank history: not on the FY2022–FY2025 lists; up 15 since FY2020.
56	Wesco International, Inc. Through Wesco Distribution Inc. Top agencies USAF (Department of the Air Force)	$617,320	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
57	S I T Corporation Top agencies DLA (Defense Logistics Agency)	$614,079	0.3%	Rank history: #66 in FY2022, #73 in FY2023, #53 in FY2024 and #27 in FY2025; down 9 since FY2020.
58	Portable Air Group LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) USAF (Department of the Air Force)	$605,983	0.3%	Rank history: #41 in FY2022, #25 in FY2023, #20 in FY2024 and #51 in FY2025; up 16 since FY2020.
59	Protec Facility Solutions GMBH Top agencies DECA (Defense Commissary Agency)	$602,439	0.3%	Rank history: #39 in FY2022, #7 in FY2023, #9 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
60	Empire Trading, LLC Top agencies USAF (Department of the Air Force)	$597,128	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
61	P.a.r. Products Co Top agencies DLA (Defense Logistics Agency)	$577,000	0.3%	Rank history: not on the FY2022–FY2024 lists and #58 in FY2025; down 7 since FY2020.
62	Export 220Volt Inc. Top agencies DOS (Department of State) Army (Department of the Army)	$542,572	0.3%	Rank history: #82 in FY2022 and not on the FY2023–FY2025 lists; down 36 since FY2020.
63	American Engineering Corporation Top agencies Navy (Department of the Navy)	$506,000	0.2%	Rank history: #79 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
64	Superior Equipment and Supply, Co. Top agencies DECA (Defense Commissary Agency)	$471,524	0.2%	Rank history: not on the FY2022–FY2025 lists; up 29 since FY2020.
65	Astrea Group for Trading and Contracting Top agencies USAF (Department of the Air Force)	$465,692	0.2%	Rank history: not on the FY2022 list, #30 in FY2023, #48 in FY2024 and #32 in FY2025; new, not ranked in FY2020.
66	Pioneer Industries, LLC Top agencies DLA (Defense Logistics Agency)	$440,715	0.2%	Rank history: #37 in FY2022, #63 in FY2023, #77 in FY2024 and #4 in FY2025; down 60 since FY2020.
67	Drytech Inc. Top agencies DLA (Defense Logistics Agency)	$439,782	0.2%	Rank history: #62 in FY2022, not on the FY2023 list, #74 in FY2024 and not on the FY2025 list; up 41 since FY2020.
68	Veterans Healthcare Supply Solutions, Inc. Top agencies VA (Department of Veterans Affairs)	$422,820	0.2%	Rank history: #73 in FY2022 and not on the FY2023–FY2025 lists; down 37 since FY2020.
69	Stratmont LLC Top agencies USAF (Department of the Air Force)	$414,970	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
70	Xchanger Manufacturing Corporation Top agencies DLA (Defense Logistics Agency)	$409,300	0.2%	Rank history: not on the FY2022–FY2025 lists; down 26 since FY2020.
71	Hill Marine Refrigeration Inc. Top agencies Commerce (Department of Commerce)	$397,680	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
72	Venergy Group LLC Top agencies VA (Department of Veterans Affairs)	$397,505	0.2%	Rank history: #59 in FY2022, #39 in FY2023, #56 in FY2024 and not on the FY2025 list; up 229 since FY2020.
73	Space Al Arabi General Trading Co. WLL Top agencies USAF (Department of the Air Force)	$376,363	0.2%	Rank history: #45 in FY2022, #92 in FY2023 and not on the FY2024–FY2025 lists; up 191 since FY2020.
74	American Chiller Service, Inc. Top agencies DOJ (Department of Justice) VA (Department of Veterans Affairs)	$367,850	0.2%	Rank history: not on the FY2022–FY2025 lists; up 131 since FY2020.
75	Reagent World, Inc. Top agencies DOI (Department of the Interior) USAF (Department of the Air Force) Army (Department of the Army)	$367,251	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
76	Western Michigan Fleet Parts Inc. Top agencies DLA (Defense Logistics Agency)	$339,285	0.2%	Rank history: not on the FY2022 list, #33 in FY2023, #37 in FY2024 and not on the FY2025 list; up 10 since FY2020.
77	Stealth Supply, Inc. Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security) Navy (Department of the Navy)	$337,360	0.2%	Rank history: not on the FY2022–FY2025 lists; down 13 since FY2020.
78	Camfil AB Through Camfil USA Inc. Top agencies DOS (Department of State) Navy (Department of the Navy)	$336,001	0.2%	Rank history: not on the FY2022–FY2025 lists; up 126 since FY2020.
79	Gill Group, Inc. Top agencies VA (Department of Veterans Affairs) DLA (Defense Logistics Agency)	$335,189	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
80	Trane U.S. Inc. Top agencies DOJ (Department of Justice) DOS (Department of State) DOT (Department of Transportation)	$328,770	0.2%	Rank history: #17 in FY2022, #32 in FY2023, not on the FY2024 list and #47 in FY2025; up 43 since FY2020.
81	Makdad Industrial Supply Co., Inc. Top agencies DLA (Defense Logistics Agency)	$322,968	0.2%	Rank history: not on the FY2022–FY2025 lists; up 10 since FY2020.
82	Independent Hardware Inc. Top agencies DLA (Defense Logistics Agency)	$321,494	0.2%	Rank history: not on the FY2022–FY2025 lists; up 24 since FY2020.
83	RNK International, Inc. Top agencies DOJ (Department of Justice) USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$319,672	0.2%	Rank history: #87 in FY2022, #72 in FY2023, #98 in FY2024 and not on the FY2025 list; up 12 since FY2020.
84	AQW Inc. Top agencies DLA (Defense Logistics Agency)	$315,985	0.2%	Rank history: not on the FY2022–FY2024 lists and #91 in FY2025; up 23 since FY2020.
85	White RON & Associates LLC Top agencies DLA (Defense Logistics Agency)	$302,680	0.1%	Rank history: not on the FY2022–FY2025 lists; down 5 since FY2020.
86	B & H International LLC Top agencies Navy (Department of the Navy) Army (Department of the Army) DOJ (Department of Justice)	$301,548	0.1%	Rank history: not on the FY2022–FY2025 lists; up 289 since FY2020.
87	Pro-Line Procurement Services LLC Top agencies USAF (Department of the Air Force)	$299,495	0.1%	Rank history: not on the FY2022–FY2025 lists; up 77 since FY2020.
88	Global Solutions SRL Top agencies Army (Department of the Army)	$297,323	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
89	Global Logistics Strategies Inc. Top agencies DLA (Defense Logistics Agency)	$296,382	0.1%	Rank history: not on the FY2022–FY2025 lists; up 40 since FY2020.
90	Apex Integrated Distribution Inc. Top agencies VA (Department of Veterans Affairs)	$292,396	0.1%	Rank history: not on the FY2022–FY2024 lists and #49 in FY2025; new, not ranked in FY2020.
91	Global Service Titan LLC Top agencies DOS (Department of State)	$291,459	0.1%	Rank history: #58 in FY2022, not on the FY2023 list, #70 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
92	Griffin Chapman Environmental Inc. Top agencies VA (Department of Veterans Affairs)	$284,988	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
93	Mydax, Inc. Top agencies USAF (Department of the Air Force)	$282,425	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
94	Noresco LLC 3 awardees, including Carrier Corporation and Carrier Guam Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$274,083	0.1%	Rank history: #53 in FY2022 and not on the FY2023–FY2025 lists; up 230 since FY2020.
95	Aldevra LLC Top agencies VA (Department of Veterans Affairs) GSA (General Services Administration)	$266,795	0.1%	Rank history: #44 in FY2022 and not on the FY2023–FY2025 lists; up 99 since FY2020.
96	Cospolich Inc. Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security) Navy (Department of the Navy)	$265,306	0.1%	Rank history: not on the FY2022 list, #62 in FY2023, not on the FY2024 list and #46 in FY2025; down 46 since FY2020.
97	Accuair, LLC Top agencies Commerce (Department of Commerce) DHS (Department of Homeland Security)	$263,398	0.1%	Rank history: not on the FY2022–FY2025 lists; down 29 since FY2020.
98	Industrial Engineering and Equipment Company Incorporated 2 awardees, including Indeeco LLC and Aspeq Heating Group LLC Top agencies DLA (Defense Logistics Agency) Smithsonian (Smithsonian Institution)	$262,544	0.1%	Rank history: not on the FY2022–FY2025 lists; up 48 since FY2020.
99	Composite Cooling Solutions, L.P. Top agencies VA (Department of Veterans Affairs)	$260,063	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
100	R F Products, Inc. Top agencies Navy (Department of the Navy)	$254,902	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.

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100 of 808 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 $208 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 333415 contractors in FY2021?

1. DCM Clean Air Products, Inc. ($44.8M), 2. Johnson Controls Security Solutions LLC ($9.65M), 3. Tyonek Native Corporatio ($8.72M), 4. Virginia Energy and Lighting, LLC ($7.62M), 5. Hunter Defense Technolog ($7.5M), 6. Leonardo S.p.A. ($6.33M), 7. Honeywell International Inc. ($6.3M), 8. Munters Corporation ($2.91M), 9. Snowbird Environmental Systems Corporation ($2.9M), 10. Pergravis Mission Critical Construction, LLC ($2.78M).

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