Top 100 Contractors in NAICS 3334: Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing, FY2023

Name: Top 100 Contractors in NAICS 3334: Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing, FY2023
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2022 – Sep 30, 2023 Code page on GovTribe

The top 10 won 54% of FY2023 NAICS 3334 contract dollars

Contract obligations: $476,213,499 Net of deobligations, by contracts coded NAICS 3334 or a code under it
Contractors: 1,128 Parent companies with an obligation
Largest contractor: Hunter Defense Technolog $89.7 million, 18.4% 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	Hunter Defense Technolog 3 awardees, including HDT Expeditionary Systems Inc. and Berg Manufacturing, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$89,716,087	18.4%	Rank history: #5 in FY2021, #1 in FY2022, #22 in FY2024 and not on the FY2025 list; unchanged since FY2022.
2	DCM Clean Air Products, Inc. Top agencies DLA (Defense Logistics Agency)	$67,970,318	13.9%	Rank history: #1 in FY2021, #2 in FY2022 and not on the FY2024–FY2025 lists; unchanged since FY2022.
3	General Dynamics Corporation 4 awardees, including General Dynamics Land Systems Inc., General Dynamics Land Systems - Canada Corporation and General Dynamics Mission Systems, Inc. Top agencies Army (Department of the Army)	$25,139,285	5.2%	Rank history: #83 in FY2021, #6 in FY2022 and not on the FY2024–FY2025 lists; up 3 since FY2022.
4	Hansome Energy Systems Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$24,517,342	5.0%	Rank history: #34 in FY2021, #11 in FY2022, #3 in FY2024 and #13 in FY2025; up 7 since FY2022.
5	Johnson Controls Security Solutions LLC 5 awardees, including Johnson Controls Navy Systems, LLC, Johnson Controls Inc. and Johnson Controls Building Automation Systems, LLC Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency) DOS (Department of State)	$16,508,416	3.4%	Rank history: #2 in FY2021, #7 in FY2022, #9 in FY2024 and not on the FY2025 list; up 2 since FY2022.
6	W S Darley & Co Top agencies USAF (Department of the Air Force)	$10,008,770	2.1%	Rank history: not on the FY2021 list, #4 in FY2022 and not on the FY2024–FY2025 lists; down 2 since FY2022.
7	Honeywell International Inc. 3 awardees, including Honeywell Inc. Top agencies HUD (Department of Housing and Urban Development) USAF (Department of the Air Force) Army (Department of the Army)	$8,446,189	1.7%	Rank history: #3 in FY2021, #8 in FY2022, #2 in FY2024 and #62 in FY2025; up 1 since FY2022.
8	Design West Technologies Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$6,947,448	1.4%	Rank history: #19 in FY2021, #43 in FY2022 and not on the FY2024–FY2025 lists; up 35 since FY2022.
9	Cepeda Associates, Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$6,472,169	1.3%	Rank history: #22 in FY2021, #5 in FY2022, #8 in FY2024 and #11 in FY2025; down 4 since FY2022.
10	O.C. Lugo Co. Inc. the Top agencies DLA (Defense Logistics Agency)	$5,905,127	1.2%	Rank history: #16 in FY2021, #86 in FY2022, #10 in FY2024 and #5 in FY2025; up 76 since FY2022.
11	Protec Facility Solutions GMBH Top agencies DECA (Defense Commissary Agency)	$5,347,467	1.1%	Rank history: #93 in FY2021, #65 in FY2022, #15 in FY2024 and not on the FY2025 list; up 54 since FY2022.
12	Biofridge Inc. Top agencies HHS (Department of Health and Human Services)	$5,078,400	1.0%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
13	Tyonek Native Corporatio Through Tfab Defense Systems LLC Top agencies Army (Department of the Army)	$5,063,194	1.0%	Rank history: #4 in FY2021, #30 in FY2022, #71 in FY2024 and not on the FY2025 list; up 17 since FY2022.
14	Angel Design Build Construction LLC Top agencies VA (Department of Veterans Affairs)	$4,998,350	1.0%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
15	DRS Global Enterprise Solutions Inc Through Engineered Coil Company Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) DHS (Department of Homeland Security)	$4,892,451	1.0%	Rank history: not on the FY2021–FY2022 lists, #21 in FY2024 and not on the FY2025 list; new.
16	Howden American Fan Company Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security) Navy (Department of the Navy)	$4,789,075	1.0%	Rank history: #10 in FY2021, #3 in FY2022 and not on the FY2024–FY2025 lists; down 13 since FY2022.
17	Windward Enterprises, LLC Top agencies DLA (Defense Logistics Agency) Army (Department of the Army)	$4,076,297	0.8%	Rank history: #12 in FY2021, #12 in FY2022, #20 in FY2024 and #25 in FY2025; down 5 since FY2022.
18	RTX Corporation 5 awardees, including Hamilton Sundstrand Corporation, Carrier Corporation and Raytheon Company Top agencies Navy (Department of the Navy) VA (Department of Veterans Affairs) DOI (Department of the Interior)	$3,677,766	0.8%	Rank history: #8 in FY2021, #9 in FY2022 and not on the FY2024–FY2025 lists; down 9 since FY2022.
19	Janels Industries Inc. Top agencies DLA (Defense Logistics Agency)	$3,637,947	0.7%	Rank history: #24 in FY2021, #22 in FY2022, #38 in FY2024 and #34 in FY2025; up 3 since FY2022.
20	Liconic US Inc. Top agencies HHS (Department of Health and Human Services)	$3,435,700	0.7%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
21	Molecular Products Inc Top agencies DLA (Defense Logistics Agency)	$3,408,900	0.7%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
22	Filtration Services, Inc. Top agencies DOJ (Department of Justice)	$3,387,884	0.7%	Rank history: #42 in FY2021, #13 in FY2022, #16 in FY2024 and #16 in FY2025; down 9 since FY2022.
23	Snowbird Environmental Systems Corporation Through Snowbird Technologies Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$2,811,707	0.6%	Rank history: #15 in FY2021, #44 in FY2022 and not on the FY2024–FY2025 lists; up 21 since FY2022.
24	Howden USA Company Through Howden American Fan Company Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$2,802,924	0.6%	Rank history: not on the FY2021–FY2022 lists, #14 in FY2024 and #36 in FY2025; new.
25	Argo Turboserve Corporation Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$2,683,829	0.6%	Rank history: #18 in FY2021, #17 in FY2022, #25 in FY2024 and #20 in FY2025; down 8 since FY2022.
26	Kampi Components Co Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) USAF (Department of the Air Force)	$2,668,150	0.5%	Rank history: #13 in FY2021, #15 in FY2022, #18 in FY2024 and #22 in FY2025; down 11 since FY2022.
27	Aero Precision Industries LLC Through Allclear Aerospace & Defense, Inc. Top agencies DLA (Defense Logistics Agency)	$2,368,569	0.5%	Rank history: #29 in FY2021, #41 in FY2022, #23 in FY2024 and not on the FY2025 list; up 14 since FY2022.
28	Clayton Associates Inc. Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force)	$2,349,294	0.5%	Rank history: #23 in FY2021, #59 in FY2022, #19 in FY2024 and #27 in FY2025; up 31 since FY2022.
29	Wright & Wright Machinery Co., Inc. Top agencies Navy (Department of the Navy)	$2,315,353	0.5%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
30	Leonardo S.p.A. 4 awardees, including Engineered Coil Company, DRS Technologies Canada Ltd. and Laurel Technologies Partnership Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security) Navy (Department of the Navy)	$2,130,852	0.4%	Rank history: #7 in FY2021, #10 in FY2022, #6 in FY2024 and #6 in FY2025; down 20 since FY2022.
31	Logis-Tech, LLC Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security) USSOCOM (United States Special Operations Command)	$2,066,040	0.4%	Rank history: #48 in FY2021, not on the FY2022 list, not on the FY2024 list and #65 in FY2025; up 101 since FY2022.
32	Ashland Electric Products Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$2,014,810	0.4%	Rank history: #21 in FY2021, #23 in FY2022, #26 in FY2024 and #37 in FY2025; down 9 since FY2022.
33	Labrepco Inc. Top agencies HHS (Department of Health and Human Services) USDA (Department of Agriculture) Commerce (Department of Commerce)	$1,892,416	0.4%	Rank history: #36 in FY2021, #29 in FY2022 and not on the FY2024–FY2025 lists; down 4 since FY2022.
34	Sanford Federal, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DOL (Department of Labor)	$1,818,624	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
35	Accentz, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$1,807,826	0.4%	Rank history: #47 in FY2021, #21 in FY2022, #62 in FY2024 and #28 in FY2025; down 14 since FY2022.
36	Tactical Environmental Systems Inc. Top agencies Army (Department of the Army)	$1,769,444	0.4%	Rank history: not on the FY2021 list, #24 in FY2022 and not on the FY2024–FY2025 lists; down 12 since FY2022.
37	Dela Technology Corporation Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$1,577,775	0.3%	Rank history: not on the FY2021 list, #53 in FY2022, #45 in FY2024 and #71 in FY2025; up 16 since FY2022.
38	Arabi Company WLL Top agencies Army (Department of the Army)	$1,531,216	0.3%	Rank history: not on the FY2021–FY2022 lists, #24 in FY2024 and #47 in FY2025; new.
39	Portable Air Group LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) VA (Department of Veterans Affairs)	$1,498,438	0.3%	Rank history: #81 in FY2021, #68 in FY2022, #33 in FY2024 and #90 in FY2025; up 29 since FY2022.
40	Johnson Controls Industries 5 awardees, including Johnson Controls, Inc. and Johnson Controls Building Automation Systems, LLC Top agencies Navy (Department of the Navy) VA (Department of Veterans Affairs) DOS (Department of State)	$1,451,046	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
41	Container Research Corp Top agencies Navy (Department of the Navy)	$1,436,714	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
42	Electric Heater Company the Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$1,435,666	0.3%	Rank history: #99 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 78 since FY2022.
43	Saudi Naval Support Co. Top agencies USAF (Department of the Air Force)	$1,435,200	0.3%	Rank history: #72 in FY2021, #18 in FY2022, #43 in FY2024 and not on the FY2025 list; down 25 since FY2022.
44	Percival Scientific Incorporated Top agencies USDA (Department of Agriculture) EPA (Environmental Protection Agency) DOI (Department of the Interior)	$1,409,989	0.3%	Rank history: #51 in FY2021, #38 in FY2022, #42 in FY2024 and not on the FY2025 list; down 6 since FY2022.
45	Astrea Group for Trading and Contracting Top agencies USAF (Department of the Air Force)	$1,382,040	0.3%	Rank history: not on the FY2021–FY2022 lists, #77 in FY2024 and #61 in FY2025; new.
46	Phoenix Systems Engineering Inc. Top agencies DOJ (Department of Justice) USAF (Department of the Air Force) Army (Department of the Army)	$1,367,195	0.3%	Rank history: #44 in FY2021, #39 in FY2022, #59 in FY2024 and #58 in FY2025; down 7 since FY2022.
47	Am General LLC 2 awardees, including Howden North America Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$1,364,519	0.3%	Rank history: not on the FY2021 list, #58 in FY2022 and not on the FY2024–FY2025 lists; up 11 since FY2022.
48	Parker-Hannifin Corporation 3 awardees Top agencies DLA (Defense Logistics Agency)	$1,343,857	0.3%	Rank history: #30 in FY2021, #20 in FY2022 and not on the FY2024–FY2025 lists; down 28 since FY2022.
49	Government of the United States 4 awardees, including Federal Prison Industries, Inc. Top agencies Army (Department of the Army) VA (Department of Veterans Affairs) USDA (Department of Agriculture)	$1,303,220	0.3%	Rank history: #53 in FY2021, #95 in FY2022, #29 in FY2024 and #41 in FY2025; up 46 since FY2022.
50	Trane U.S. Inc. Top agencies DOJ (Department of Justice) VA (Department of Veterans Affairs) Army (Department of the Army)	$1,280,834	0.3%	Rank history: not on the FY2021 list, #31 in FY2022 and not on the FY2024–FY2025 lists; down 19 since FY2022.
51	Xenex Disinfection Services Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$1,248,030	0.3%	Rank history: #49 in FY2021, #37 in FY2022, #32 in FY2024 and #67 in FY2025; down 14 since FY2022.
52	The L.c.doane Company Top agencies DLA (Defense Logistics Agency)	$1,234,530	0.3%	Rank history: #70 in FY2021, #71 in FY2022, #65 in FY2024 and #74 in FY2025; up 19 since FY2022.
53	Lockheed Martin Corporation 6 awardees Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$1,229,523	0.3%	Rank history: not on the FY2021 list, #25 in FY2022, not on the FY2024 list and #50 in FY2025; down 28 since FY2022.
54	Phoenix Trading Inc. Top agencies DLA (Defense Logistics Agency)	$1,202,188	0.2%	Rank history: #55 in FY2021, #69 in FY2022, #50 in FY2024 and #35 in FY2025; up 15 since FY2022.
55	Western Michigan Fleet Parts Inc. Top agencies DLA (Defense Logistics Agency)	$1,192,234	0.2%	Rank history: not on the FY2021–FY2022 lists, #61 in FY2024 and not on the FY2025 list; up 357 since FY2022.
56	Porr AG Through Porr Government Services GMBH Top agencies Army (Department of the Army)	$1,171,573	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
57	Aantilia LLC Top agencies DOJ (Department of Justice) USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration)	$1,117,270	0.2%	Rank history: #97 in FY2021, #34 in FY2022, #76 in FY2024 and #30 in FY2025; down 23 since FY2022.
58	Dynamic Air Engineering, Inc. Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$1,110,195	0.2%	Rank history: #32 in FY2021, #89 in FY2022, #41 in FY2024 and #24 in FY2025; up 31 since FY2022.
59	SAFRAN Through Enviro Systems Inc. Top agencies Army (Department of the Army)	$1,099,512	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
60	DLJ Management Services, LLC Top agencies Army (Department of the Army)	$1,091,817	0.2%	Rank history: not on the FY2021–FY2022 lists, #40 in FY2024 and not on the FY2025 list; new.
61	RSE Inc. Top agencies Army (Department of the Army)	$1,073,010	0.2%	Rank history: #11 in FY2021, not on the FY2022 list, #82 in FY2024 and #97 in FY2025; up 56 since FY2022.
62	Venergy Group LLC Top agencies VA (Department of Veterans Affairs)	$1,072,554	0.2%	Rank history: #66 in FY2021, #97 in FY2022, #85 in FY2024 and not on the FY2025 list; up 35 since FY2022.
63	Filtmore Technologies LLC Top agencies Army (Department of the Army)	$991,664	0.2%	Rank history: not on the FY2021 list, #67 in FY2022 and not on the FY2024–FY2025 lists; up 4 since FY2022.
64	Aldevra LLC Top agencies VA (Department of Veterans Affairs)	$962,288	0.2%	Rank history: not on the FY2021–FY2022 lists, #95 in FY2024 and #31 in FY2025; up 152 since FY2022.
65	Warfighter Focused Logistics Inc. Top agencies DLA (Defense Logistics Agency)	$942,797	0.2%	Rank history: not on the FY2021 list, #78 in FY2022, #92 in FY2024 and #56 in FY2025; up 13 since FY2022.
66	Jgils, LLC Top agencies DLA (Defense Logistics Agency)	$921,345	0.2%	Rank history: not on the FY2021–FY2022 lists, #70 in FY2024 and #46 in FY2025; up 56 since FY2022.
67	Imeco Inc. 2 awardees, including Trident Maritime Systems, Inc. Top agencies Navy (Department of the Navy)	$896,424	0.2%	Rank history: #64 in FY2021, #61 in FY2022 and not on the FY2024–FY2025 lists; down 6 since FY2022.
68	Pioneer Industries, LLC Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$889,755	0.2%	Rank history: #37 in FY2021, #19 in FY2022, #63 in FY2024 and #4 in FY2025; down 49 since FY2022.
69	Advanced Products Services Inc. Top agencies DLA (Defense Logistics Agency)	$803,398	0.2%	Rank history: not on the FY2021–FY2022 lists, #74 in FY2024 and not on the FY2025 list; new.
70	RC Quartermaster LLC Top agencies VA (Department of Veterans Affairs)	$792,400	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
71	3ON Systems Inc. Top agencies DLA (Defense Logistics Agency)	$788,559	0.2%	Rank history: #84 in FY2021, #35 in FY2022 and not on the FY2024–FY2025 lists; down 36 since FY2022.
72	Statz Corp Top agencies DLA (Defense Logistics Agency) VA (Department of Veterans Affairs)	$773,480	0.2%	Rank history: not on the FY2021–FY2022 lists, #35 in FY2024 and not on the FY2025 list; new.
73	R & M Government Services Inc. Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force)	$770,112	0.2%	Rank history: not on the FY2021–FY2022 lists, #51 in FY2024 and #38 in FY2025; new.
74	Triman Industries Inc. 2 awardees, including Brighton Cromwell LLC Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$755,103	0.2%	Rank history: not on the FY2021–FY2022 lists, #84 in FY2024 and #49 in FY2025; up 246 since FY2022.
75	Chemring Group PLC Through Chemring Sensors and Electronic Systems, Inc. Top agencies Army (Department of the Army)	$747,648	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
76	Quality Refrigeration Company, Inc. 2 awardees Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency) Commerce (Department of Commerce)	$747,259	0.2%	Rank history: #41 in FY2021, #56 in FY2022, #57 in FY2024 and #39 in FY2025; down 20 since FY2022.
77	Daikin Applied Americas Inc 2 awardees, including Daikin Applied Germany GMBH Top agencies DOS (Department of State) USAF (Department of the Air Force)	$728,707	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 318 since FY2022.
78	Valor Construction Management, LLC Top agencies VA (Department of Veterans Affairs)	$720,156	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
79	Aqua-Chem, Inc. Top agencies DLA (Defense Logistics Agency)	$712,658	0.1%	Rank history: #80 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 150 since FY2022.
80	Talon Veteran Services Incorporated Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency) USDA (Department of Agriculture)	$711,347	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
81	ECI Defense Group, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$704,936	0.1%	Rank history: not on the FY2021–FY2022 lists, #34 in FY2024 and #19 in FY2025; up 59 since FY2022.
82	Mooweep LLC Top agencies DOI (Department of the Interior)	$682,500	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
83	Pacific International Trading Contracting and Services Top agencies USAF (Department of the Air Force)	$675,900	0.1%	Rank history: not on the FY2021–FY2022 lists, #60 in FY2024 and #75 in FY2025; new.
84	Export 220Volt Inc. Top agencies DOS (Department of State) DLA (Defense Logistics Agency) DOE (Department of Energy)	$671,389	0.1%	Rank history: #90 in FY2021, #32 in FY2022, #55 in FY2024 and #91 in FY2025; down 52 since FY2022.
85	Allied Defense Industries Inc. 2 awardees, including Allied Marine Services LLC Top agencies DLA (Defense Logistics Agency)	$660,376	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 236 since FY2022.
86	Randy Henry Holdings, Inc. Top agencies Navy (Department of the Navy)	$650,821	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
87	Marotta Controls Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$633,685	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 271 since FY2022.
88	Government of Canada Through Canadian Commercial Corporation Top agencies DLA (Defense Logistics Agency)	$623,557	0.1%	Rank history: #33 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 168 since FY2022.
89	Energy Focus, Inc. Top agencies DLA (Defense Logistics Agency)	$622,354	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 168 since FY2022.
90	MCO Solutions, Inc. Top agencies DLA (Defense Logistics Agency)	$617,257	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 61 since FY2022.
91	Burhani Enterprises Inc. Top agencies DLA (Defense Logistics Agency) DOI (Department of the Interior)	$610,777	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 46 since FY2022.
92	Waygate Technologies USA LP Top agencies Navy (Department of the Navy)	$600,152	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
93	2Lyons Aerospace LLC Top agencies DLA (Defense Logistics Agency)	$596,279	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
94	Lektron Inc. Top agencies Army (Department of the Army)	$593,604	0.1%	Rank history: #78 in FY2021, #28 in FY2022, #56 in FY2024 and #48 in FY2025; down 66 since FY2022.
95	S I T Corporation Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security) Navy (Department of the Navy)	$593,491	0.1%	Rank history: #60 in FY2021, #82 in FY2022, #47 in FY2024 and #33 in FY2025; down 13 since FY2022.
96	Automation Authority Inc. Top agencies DLA (Defense Logistics Agency)	$585,218	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
97	Euramco Safety, Inc. Top agencies Navy (Department of the Navy)	$563,840	0.1%	Rank history: #39 in FY2021, #54 in FY2022 and not on the FY2024–FY2025 lists; down 43 since FY2022.
98	JD Martin Construction Services Inc. Top agencies USAF (Department of the Air Force)	$548,998	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
99	B & H International LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) HHS (Department of Health and Human Services)	$537,743	0.1%	Rank history: not on the FY2021 list, #48 in FY2022, #79 in FY2024 and not on the FY2025 list; down 51 since FY2022.
100	Dutch Valley Supply Co. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$527,757	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 50 since FY2022.

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100 of 1,128 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 3334

Code	Net obligations	Largest contractor
33341 Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing	$476,213,499	Hunter Defense Technolog

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 $488 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 2023 ran Oct 1, 2022 – Sep 30, 2023. 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 FY2022. "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 FY2022 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 3334 contractors in FY2023?

1. Hunter Defense Technolog ($89.7M), 2. DCM Clean Air Products, Inc. ($68M), 3. General Dynamics Corporation ($25.1M), 4. Hansome Energy Systems Inc. ($24.5M), 5. Johnson Controls Security Solutions LLC ($16.5M), 6. W S Darley & Co ($10M), 7. Honeywell International Inc. ($8.45M), 8. Design West Technologies Inc. ($6.95M), 9. Cepeda Associates, Inc. ($6.47M), 10. O.C. Lugo Co. Inc. the ($5.91M).

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