Top 100 Contractors in NAICS 3334: Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing, FY2024

Name: Top 100 Contractors in NAICS 3334: Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing, FY2024
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2023 – Sep 30, 2024 Code page on GovTribe

The top 10 won 43% of FY2024 NAICS 3334 contract dollars

Contract obligations: $373,827,881 Net of deobligations, by contracts coded NAICS 3334 or a code under it
Contractors: 1,200 Parent companies with an obligation
Largest contractor: Johnson Controls Navy Systems, LLC $48.2 million, 12.5% 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	Johnson Controls Navy Systems, LLC Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$48,208,188	12.5%	Rank history: not on the FY2021–FY2023 lists and #1 in FY2025; new.
2	Honeywell International Inc. 2 awardees, including Honeywell Inc. Top agencies HUD (Department of Housing and Urban Development) Army (Department of the Army) USAF (Department of the Air Force)	$35,171,915	9.1%	Rank history: #3 in FY2021, #8 in FY2022, #7 in FY2023 and #62 in FY2025; up 5 since FY2023.
3	Hansome Energy Systems Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$18,333,186	4.7%	Rank history: #34 in FY2021, #11 in FY2022, #4 in FY2023 and #13 in FY2025; up 1 since FY2023.
4	On-Point Defense Technologies LLC Top agencies Army (Department of the Army)	$11,728,093	3.0%	Rank history: not on the FY2021–FY2023 lists and #10 in FY2025; new.
5	Mainstream Engineering Corp Top agencies USAF (Department of the Air Force)	$11,210,137	2.9%	Rank history: not on the FY2021 list, #27 in FY2022, not on the FY2023 list and #9 in FY2025; up 126 since FY2023.
6	Leonardo S.p.A. 3 awardees, including Engineered Coil Company and DRS Naval Power Systems Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) DHS (Department of Homeland Security)	$10,315,156	2.7%	Rank history: #7 in FY2021, #10 in FY2022, #30 in FY2023 and #6 in FY2025; up 24 since FY2023.
7	HDT Expeditionary Systems Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$9,615,442	2.5%	Rank history: #58 in FY2021, not on the FY2022–FY2023 lists and #3 in FY2025; returned.
8	Cepeda Associates, Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$8,205,363	2.1%	Rank history: #22 in FY2021, #5 in FY2022, #9 in FY2023 and #11 in FY2025; up 1 since FY2023.
9	Johnson Controls Security Solutions LLC Through Johnson Controls Navy Systems, LLC Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$7,462,775	1.9%	Rank history: #2 in FY2021, #7 in FY2022, #5 in FY2023 and not on the FY2025 list; down 4 since FY2023.
10	O.C. Lugo Co. Inc. the Top agencies DLA (Defense Logistics Agency)	$7,400,448	1.9%	Rank history: #16 in FY2021, #86 in FY2022, #10 in FY2023 and #5 in FY2025; unchanged since FY2023.
11	Northrop Grumman Corporation 2 awardees, including Northrop Grumman Systems Corporation Top agencies Army (Department of the Army) Navy (Department of the Navy)	$7,303,564	1.9%	Rank history: not on the FY2021 list, #36 in FY2022, not on the FY2023 list and not on the FY2025 list; up 316 since FY2023.
12	Howden North America Inc 2 awardees, including Howden American Fan Company Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$7,285,537	1.9%	Rank history: not on the FY2021–FY2023 lists and #23 in FY2025; new.
13	Amerind BG JV, LLC Top agencies HHS (Department of Health and Human Services)	$6,895,000	1.8%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
14	Howden USA Company Through Howden American Fan Company Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) Commerce (Department of Commerce)	$4,778,528	1.2%	Rank history: not on the FY2021–FY2022 lists, #24 in FY2023 and #36 in FY2025; up 10 since FY2023.
15	Protec Facility Solutions GMBH Top agencies DECA (Defense Commissary Agency)	$3,982,494	1.0%	Rank history: #93 in FY2021, #65 in FY2022, #11 in FY2023 and not on the FY2025 list; down 4 since FY2023.
16	Filtration Services, Inc. Top agencies DOJ (Department of Justice)	$3,711,683	1.0%	Rank history: #42 in FY2021, #13 in FY2022, #22 in FY2023 and #16 in FY2025; up 6 since FY2023.
17	Allcom Global Services Inc. Through Strantech LLC Top agencies DISA (Defense Information Systems Agency)	$3,688,397	1.0%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
18	Kampi Components Co Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$3,480,556	0.9%	Rank history: #13 in FY2021, #15 in FY2022, #26 in FY2023 and #22 in FY2025; up 8 since FY2023.
19	Clayton Associates Inc. Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force)	$3,168,081	0.8%	Rank history: #23 in FY2021, #59 in FY2022, #28 in FY2023 and #27 in FY2025; up 9 since FY2023.
20	Windward Enterprises, LLC Top agencies DLA (Defense Logistics Agency)	$3,055,683	0.8%	Rank history: #12 in FY2021, #12 in FY2022, #17 in FY2023 and #25 in FY2025; down 3 since FY2023.
21	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)	$2,804,624	0.7%	Rank history: not on the FY2021–FY2022 lists, #15 in FY2023 and not on the FY2025 list; down 6 since FY2023.
22	Hunter Defense Technolog 2 awardees, including HDT Expeditionary Systems Inc. Top agencies Navy (Department of the Navy)	$2,799,480	0.7%	Rank history: #5 in FY2021, #1 in FY2022, #1 in FY2023 and not on the FY2025 list; down 21 since FY2023.
23	Aero Precision Industries LLC Through Allclear Aerospace & Defense, Inc. Top agencies DLA (Defense Logistics Agency)	$2,793,397	0.7%	Rank history: #29 in FY2021, #41 in FY2022, #27 in FY2023 and not on the FY2025 list; up 4 since FY2023.
24	Arabi Company WLL Top agencies Army (Department of the Army)	$2,088,349	0.5%	Rank history: not on the FY2021–FY2022 lists, #38 in FY2023 and #47 in FY2025; up 14 since FY2023.
25	Argo Turboserve Corporation 2 awardees Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$2,052,786	0.5%	Rank history: #18 in FY2021, #17 in FY2022, #25 in FY2023 and #20 in FY2025; unchanged since FY2023.
26	Ashland Electric Products Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$2,044,849	0.5%	Rank history: #21 in FY2021, #23 in FY2022, #32 in FY2023 and #37 in FY2025; up 6 since FY2023.
27	VWR International LLC 2 awardees, including Labrepco LLC Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs) Navy (Department of the Navy)	$1,940,077	0.5%	Rank history: not on the FY2021–FY2023 lists and #78 in FY2025; new.
28	Snowbird Technologies Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$1,906,783	0.5%	Rank history: not on the FY2021–FY2023 lists and #15 in FY2025; new.
29	Government of the United States 2 awardees, including Federal Prison Industries, Inc. Top agencies Army (Department of the Army) Commerce (Department of Commerce) VA (Department of Veterans Affairs)	$1,867,865	0.5%	Rank history: #53 in FY2021, #95 in FY2022, #49 in FY2023 and #41 in FY2025; up 20 since FY2023.
30	Johnson Controls Building Automation Systems, LLC Top agencies Navy (Department of the Navy) DOS (Department of State)	$1,658,648	0.4%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
31	Allclear Aerospace & Defense, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$1,624,404	0.4%	Rank history: not on the FY2021–FY2023 lists and #17 in FY2025; new.
32	Xenex Disinfection Services Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$1,596,571	0.4%	Rank history: #49 in FY2021, #37 in FY2022, #51 in FY2023 and #67 in FY2025; up 19 since FY2023.
33	Portable Air Group LLC Top agencies Army (Department of the Army) DHS (Department of Homeland Security) DLA (Defense Logistics Agency)	$1,594,367	0.4%	Rank history: #81 in FY2021, #68 in FY2022, #39 in FY2023 and #90 in FY2025; up 6 since FY2023.
34	ECI Defense Group, Inc. 2 awardees Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) USAF (Department of the Air Force)	$1,564,638	0.4%	Rank history: not on the FY2021–FY2022 lists, #81 in FY2023 and #19 in FY2025; up 47 since FY2023.
35	Statz Corp Top agencies DLA (Defense Logistics Agency)	$1,563,044	0.4%	Rank history: not on the FY2021–FY2022 lists, #72 in FY2023 and not on the FY2025 list; up 37 since FY2023.
36	Chesapeake Marine Refrigeration Corp Top agencies Navy (Department of the Navy)	$1,472,586	0.4%	Rank history: #86 in FY2021, not on the FY2022–FY2023 lists and #51 in FY2025; up 164 since FY2023.
37	Parker-Hannifin Corp Top agencies DLA (Defense Logistics Agency)	$1,402,466	0.4%	Rank history: not on the FY2021–FY2023 lists and #52 in FY2025; new.
38	Janels Industries Inc. Top agencies DLA (Defense Logistics Agency)	$1,383,846	0.4%	Rank history: #24 in FY2021, #22 in FY2022, #19 in FY2023 and #34 in FY2025; down 19 since FY2023.
39	Linde Public Limited Company Through Linde Engineering North America LLC Top agencies NASA (National Aeronautics and Space Administration)	$1,332,250	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
40	DLJ Management Services, LLC Top agencies Army (Department of the Army)	$1,316,651	0.3%	Rank history: not on the FY2021–FY2022 lists, #60 in FY2023 and not on the FY2025 list; up 20 since FY2023.
41	Dynamic Air Engineering, Inc. Top agencies DHS (Department of Homeland Security) DLA (Defense Logistics Agency) Navy (Department of the Navy)	$1,273,557	0.3%	Rank history: #32 in FY2021, #89 in FY2022, #58 in FY2023 and #24 in FY2025; up 17 since FY2023.
42	Percival Scientific Incorporated Top agencies USDA (Department of Agriculture) Army (Department of the Army) DOI (Department of the Interior)	$1,255,198	0.3%	Rank history: #51 in FY2021, #38 in FY2022, #44 in FY2023 and not on the FY2025 list; up 2 since FY2023.
43	Saudi Naval Support Co. Top agencies USAF (Department of the Air Force)	$1,237,860	0.3%	Rank history: #72 in FY2021, #18 in FY2022, #43 in FY2023 and not on the FY2025 list; unchanged since FY2023.
44	RTX Corporation 4 awardees, including Hamilton Sundstrand Corporation Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$1,215,037	0.3%	Rank history: not on the FY2021–FY2023 lists and #40 in FY2025; new.
45	Dela Technology Corporation Top agencies DLA (Defense Logistics Agency)	$1,211,137	0.3%	Rank history: not on the FY2021 list, #53 in FY2022, #37 in FY2023 and #71 in FY2025; down 8 since FY2023.
46	Prts Global, LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$1,150,561	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 200 since FY2023.
47	S I T Corporation Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$1,131,285	0.3%	Rank history: #60 in FY2021, #82 in FY2022, #95 in FY2023 and #33 in FY2025; up 48 since FY2023.
48	Sky Creative for Trading and Contracting Company Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$1,116,634	0.3%	Rank history: #69 in FY2021, not on the FY2022–FY2023 lists and #69 in FY2025; up 109 since FY2023.
49	Duroair Technologies USA Inc. Top agencies Army (Department of the Army)	$1,110,092	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 110 since FY2023.
50	Phoenix Trading Inc. 2 awardees Top agencies DLA (Defense Logistics Agency)	$1,108,141	0.3%	Rank history: #55 in FY2021, #69 in FY2022, #54 in FY2023 and #35 in FY2025; up 4 since FY2023.
51	R & M Government Services Inc. Top agencies DLA (Defense Logistics Agency)	$1,099,799	0.3%	Rank history: not on the FY2021–FY2022 lists, #73 in FY2023 and #38 in FY2025; up 22 since FY2023.
52	Mil Serve International Inc. Top agencies Army (Department of the Army) DOS (Department of State)	$1,089,284	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
53	Ashtead US Holdings Inc Through Sunbelt Rentals, Inc. Top agencies VA (Department of Veterans Affairs) DOT (Department of Transportation) USAF (Department of the Air Force)	$1,051,541	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 370 since FY2023.
54	Northrop Grumman Systems Corporation Top agencies Navy (Department of the Navy)	$1,044,548	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
55	Export 220Volt Inc. Top agencies DOS (Department of State) USAID (US Agency for International Development)	$1,024,215	0.3%	Rank history: #90 in FY2021, #32 in FY2022, #84 in FY2023 and #91 in FY2025; up 29 since FY2023.
56	Lektron Inc. Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$1,020,850	0.3%	Rank history: #78 in FY2021, #28 in FY2022, #94 in FY2023 and #48 in FY2025; up 38 since FY2023.
57	Quality Refrigeration Company, Inc. 2 awardees Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$986,011	0.3%	Rank history: #41 in FY2021, #56 in FY2022, #76 in FY2023 and #39 in FY2025; up 19 since FY2023.
58	Pergravis Mission Critical Construction, LLC Top agencies DISA (Defense Information Systems Agency)	$950,644	0.2%	Rank history: #17 in FY2021, not on the FY2022–FY2023 lists and not on the FY2025 list; up 88 since FY2023.
59	Phoenix Systems Engineering Inc. Top agencies DLA (Defense Logistics Agency) Army (Department of the Army) USAF (Department of the Air Force)	$947,379	0.2%	Rank history: #44 in FY2021, #39 in FY2022, #46 in FY2023 and #58 in FY2025; down 13 since FY2023.
60	Pacific International Trading Contracting and Services Top agencies USAF (Department of the Air Force)	$943,789	0.2%	Rank history: not on the FY2021–FY2022 lists, #83 in FY2023 and #75 in FY2025; up 23 since FY2023.
61	Western Michigan Fleet Parts Inc. Top agencies DLA (Defense Logistics Agency)	$942,618	0.2%	Rank history: not on the FY2021–FY2022 lists, #55 in FY2023 and not on the FY2025 list; down 6 since FY2023.
62	Accentz, Inc. Top agencies USAF (Department of the Air Force)	$936,012	0.2%	Rank history: #47 in FY2021, #21 in FY2022, #35 in FY2023 and #28 in FY2025; down 27 since FY2023.
63	Pioneer Industries, LLC Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) DHS (Department of Homeland Security)	$915,062	0.2%	Rank history: #37 in FY2021, #19 in FY2022, #68 in FY2023 and #4 in FY2025; up 5 since FY2023.
64	Winergy LLC Top agencies VA (Department of Veterans Affairs)	$897,864	0.2%	Rank history: not on the FY2021–FY2023 lists and #86 in FY2025; new.
65	The L.c.doane Company Top agencies DLA (Defense Logistics Agency)	$854,386	0.2%	Rank history: #70 in FY2021, #71 in FY2022, #52 in FY2023 and #74 in FY2025; down 13 since FY2023.
66	Meggitt Aerospace Limited 2 awardees, including Meggitt Defense Systems, Inc. and Parker-Hannifin Corp Top agencies DLA (Defense Logistics Agency) Army (Department of the Army)	$832,116	0.2%	Rank history: not on the FY2021–FY2023 lists and #12 in FY2025; new.
67	J.t. Systems, Inc. Top agencies Navy (Department of the Navy)	$808,600	0.2%	Rank history: #88 in FY2021, not on the FY2022–FY2023 lists and #89 in FY2025; up 137 since FY2023.
68	U.s. Vet General Contracting, LLC Top agencies DOI (Department of the Interior)	$806,871	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
69	Sericore LLC Top agencies Navy (Department of the Navy)	$771,664	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
70	Jgils, LLC Top agencies DLA (Defense Logistics Agency)	$756,046	0.2%	Rank history: not on the FY2021–FY2022 lists, #66 in FY2023 and #46 in FY2025; down 4 since FY2023.
71	Tyonek Native Corporatio Through Tfab Defense Systems LLC Top agencies Army (Department of the Army)	$739,495	0.2%	Rank history: #4 in FY2021, #30 in FY2022, #13 in FY2023 and not on the FY2025 list; down 58 since FY2023.
72	Morpac Industries, Inc. Top agencies Navy (Department of the Navy)	$703,000	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
73	Transupport Inc. Top agencies DLA (Defense Logistics Agency)	$694,970	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 41 since FY2023.
74	Advanced Products Services Inc. Top agencies DLA (Defense Logistics Agency)	$686,244	0.2%	Rank history: not on the FY2021–FY2022 lists, #69 in FY2023 and not on the FY2025 list; down 5 since FY2023.
75	Sandlapper Controls, Inc. Top agencies USDA (Department of Agriculture)	$680,580	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
76	Aantilia LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration)	$679,460	0.2%	Rank history: #97 in FY2021, #34 in FY2022, #57 in FY2023 and #30 in FY2025; down 19 since FY2023.
77	Astrea Group for Trading and Contracting Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$654,312	0.2%	Rank history: not on the FY2021–FY2022 lists, #45 in FY2023 and #61 in FY2025; down 32 since FY2023.
78	FMS Integrated Building Services Limited Top agencies DECA (Defense Commissary Agency)	$647,224	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
79	B & H International LLC Top agencies DHS (Department of Homeland Security) USAF (Department of the Air Force) DOJ (Department of Justice)	$644,775	0.2%	Rank history: not on the FY2021 list, #48 in FY2022, #99 in FY2023 and not on the FY2025 list; up 20 since FY2023.
80	Sherwood Avionics and Accessories, Inc. Top agencies Army (Department of the Army)	$632,820	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
81	Bluefors Inc. Top agencies Commerce (Department of Commerce)	$624,286	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
82	RSE Inc. Top agencies Army (Department of the Army)	$600,235	0.2%	Rank history: #11 in FY2021, not on the FY2022 list, #61 in FY2023 and #97 in FY2025; down 21 since FY2023.
83	Appleton Marine Inc. Top agencies Navy (Department of the Navy)	$600,000	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
84	Triman Industries Inc. Top agencies DLA (Defense Logistics Agency)	$584,113	0.2%	Rank history: not on the FY2021–FY2022 lists, #74 in FY2023 and #49 in FY2025; down 10 since FY2023.
85	Venergy Group LLC Top agencies VA (Department of Veterans Affairs)	$582,934	0.2%	Rank history: #66 in FY2021, #97 in FY2022, #62 in FY2023 and not on the FY2025 list; down 23 since FY2023.
86	Adrick Marine Group, Inc. Top agencies DHS (Department of Homeland Security)	$567,280	0.1%	Rank history: #79 in FY2021, #88 in FY2022, not on the FY2023 list and not on the FY2025 list; up 279 since FY2023.
87	Martin Military Inc. Top agencies DLA (Defense Logistics Agency)	$562,248	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 77 since FY2023.
88	Teledyne Instruments Inc. Top agencies Navy (Department of the Navy)	$558,414	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
89	Am General LLC Top agencies DLA (Defense Logistics Agency)	$539,370	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
90	Results Sales & Service, L.L.C. Top agencies VA (Department of Veterans Affairs)	$533,233	0.1%	Rank history: not on the FY2021–FY2023 lists and #53 in FY2025; new.
91	TK Airport Solutions, Inc. Top agencies Navy (Department of the Navy)	$525,800	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
92	Warfighter Focused Logistics Inc. Top agencies DLA (Defense Logistics Agency)	$515,041	0.1%	Rank history: not on the FY2021 list, #78 in FY2022, #65 in FY2023 and #56 in FY2025; down 27 since FY2023.
93	United Dynamics, Inc. Top agencies DLA (Defense Logistics Agency)	$511,500	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 104 since FY2023.
94	TECH Service Solutions LLC Top agencies DOI (Department of the Interior) USAF (Department of the Air Force) Army (Department of the Army)	$508,420	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 276 since FY2023.
95	Aldevra LLC Top agencies VA (Department of Veterans Affairs) DOI (Department of the Interior) HHS (Department of Health and Human Services)	$502,260	0.1%	Rank history: not on the FY2021–FY2022 lists, #64 in FY2023 and #31 in FY2025; down 31 since FY2023.
96	Hydro-Aire Aerospace Corp. Top agencies DLA (Defense Logistics Agency)	$498,600	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
97	Global Logistics Strategies Inc. Top agencies DLA (Defense Logistics Agency)	$495,615	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 5 since FY2023.
98	Trillamed LLC Top agencies VA (Department of Veterans Affairs)	$494,909	0.1%	Rank history: not on the FY2021 list, #93 in FY2022, not on the FY2023 list and #70 in FY2025; up 12 since FY2023.
99	Russ Equipment Co., Incorporated Top agencies DHS (Department of Homeland Security)	$489,786	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 182 since FY2023.
100	Larkos Packing and Distribution Inc. Top agencies DLA (Defense Logistics Agency)	$487,907	0.1%	Rank history: not on the FY2021–FY2023 lists and #81 in FY2025; up 42 since FY2023.

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100 of 1,200 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	$373,827,881	Johnson Controls Navy Systems, LLC

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 $387 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 2024 ran Oct 1, 2023 – Sep 30, 2024. 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 FY2023. "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 FY2023 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 FY2024?

1. Johnson Controls Navy Systems, LLC ($48.2M), 2. Honeywell International Inc. ($35.2M), 3. Hansome Energy Systems Inc. ($18.3M), 4. On-Point Defense Technologies LLC ($11.7M), 5. Mainstream Engineering Corp ($11.2M), 6. Leonardo S.p.A. ($10.3M), 7. HDT Expeditionary Systems Inc. ($9.62M), 8. Cepeda Associates, Inc. ($8.21M), 9. Johnson Controls Security Solutions LLC ($7.46M), 10. O.C. Lugo Co. Inc. the ($7.4M).

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