Top 100 Contractors in PSC 4120: Air Conditioning Equipment, Jul 2025–Jun 2026

Name: Top 100 Contractors in PSC 4120: Air Conditioning Equipment, Jul 2025–Jun 2026
Creator: GovTribe

Parent companies by net contract obligations Jul 1, 2025 – Jun 30, 2026 Code page on GovTribe

The top 10 won 80% of PSC 4120 contract dollars from July 2025 through June 2026

Contract obligations: $202,935,788 Net of deobligations, by contracts coded PSC 4120
Contractors: 290 Parent companies with an obligation
Largest contractor: Johnson Controls Navy Systems, LLC $69.6 million, 33.9% 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)	$69,551,861	33.9%	Rank history: not on the FY2021–FY2023 lists, #1 in FY2024 and #2 in FY2025; up 1 since Jul 2024–Jun 2025.
2	Simulation Technologies Inc Top agencies Army (Department of the Army)	$49,664,136	24.2%	Rank history: not on the FY2021–FY2024 lists and #1 in FY2025; new, not ranked in Jul 2024–Jun 2025.
3	Atap Inc. Top agencies USAF (Department of the Air Force)	$13,921,741	6.8%	Rank history: not on the FY2021–FY2022 lists, #22 in FY2023, #10 in FY2024 and not on the FY2025 list; new, not ranked in Jul 2024–Jun 2025.
4	HDT Expeditionary Systems Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$11,773,014	5.7%	Rank history: not on the FY2021–FY2023 lists, #9 in FY2024 and #4 in FY2025; up 2 since Jul 2024–Jun 2025.
5	Cam Management and Services, LLC Top agencies USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$6,001,698	2.9%	Rank history: not on the FY2021–FY2023 lists, #11 in FY2024 and #5 in FY2025; down 2 since Jul 2024–Jun 2025.
6	Snowbird Technologies Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$4,906,855	2.4%	Rank history: not on the FY2021 list, #61 in FY2022, not on the FY2023 list, #13 in FY2024 and #6 in FY2025; down 1 since Jul 2024–Jun 2025.
7	Alvest (USA) Inc. Through TLD America Corporation Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$2,514,120	1.2%	Rank history: not on the FY2021–FY2023 lists, #61 in FY2024 and not on the FY2025 list; up 49 since Jul 2024–Jun 2025.
8	Aantilia LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$2,403,422	1.2%	Rank history: #87 in FY2021, #66 in FY2022, #51 in FY2023, not on the FY2024 list and #8 in FY2025; up 280 since Jul 2024–Jun 2025.
9	Windward Enterprises, LLC Top agencies DLA (Defense Logistics Agency)	$2,042,090	1.0%	Rank history: #9 in FY2021, not on the FY2022 list, #45 in FY2023, #33 in FY2024 and #15 in FY2025; up 12 since Jul 2024–Jun 2025.
10	Trane U.s. Inc. Top agencies DOJ (Department of Justice) VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$1,903,387	0.9%	Rank history: #7 in FY2021, #5 in FY2022, #6 in FY2023, #7 in FY2024 and #12 in FY2025; down 3 since Jul 2024–Jun 2025.
11	Accentz, Inc. Top agencies USAF (Department of the Air Force) DHS (Department of Homeland Security)	$1,469,732	0.7%	Rank history: #37 in FY2021, #20 in FY2022, #16 in FY2023, #19 in FY2024 and #7 in FY2025; down 3 since Jul 2024–Jun 2025.
12	OST Services, LLC Top agencies VA (Department of Veterans Affairs)	$1,394,185	0.7%	Rank history: not on the FY2021–FY2024 lists and #14 in FY2025; new, not ranked in Jul 2024–Jun 2025.
13	Snodgrass Contracting LLC Top agencies HHS (Department of Health and Human Services)	$1,364,359	0.7%	Rank history: not on the FY2021 list, #11 in FY2022, #14 in FY2023, #14 in FY2024 and #11 in FY2025; down 4 since Jul 2024–Jun 2025.
14	Reon Inc. Top agencies HHS (Department of Health and Human Services)	$1,319,132	0.6%	Rank history: not on the FY2021–FY2022 lists, #36 in FY2023, #38 in FY2024 and #36 in FY2025; up 45 since Jul 2024–Jun 2025.
15	Advanced Cooling Technologies Inc. Top agencies NASA (National Aeronautics and Space Administration)	$1,194,189	0.6%	Rank history: not on the FY2021–FY2022 lists, #65 in FY2023, #5 in FY2024 and #13 in FY2025; up 38 since Jul 2024–Jun 2025.
16	Alaska Structures Inc. Through AKS Industries Inc. Top agencies DLA (Defense Logistics Agency)	$1,156,499	0.6%	Rank history: not on the FY2021–FY2024 lists and #10 in FY2025; down 5 since Jul 2024–Jun 2025.
17	Front Range Construction Inc. Top agencies DOS (Department of State)	$1,048,338	0.5%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
18	Atlantic Diving Supply, Inc. Top agencies DLA (Defense Logistics Agency)	$993,173	0.5%	Rank history: not on the FY2021–FY2023 lists, #34 in FY2024 and #22 in FY2025; up 13 since Jul 2024–Jun 2025.
19	Aggreko LLC Top agencies Army (Department of the Army) VA (Department of Veterans Affairs)	$935,281	0.5%	Rank history: not on the FY2021–FY2024 lists and #17 in FY2025; up 21 since Jul 2024–Jun 2025.
20	CD Mechanical, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DOJ (Department of Justice)	$813,000	0.4%	Rank history: not on the FY2021–FY2024 lists and #57 in FY2025; new, not ranked in Jul 2024–Jun 2025.
21	Andrew'S Refrigeration Inc. Through Andrews Refrigeration Inc. Top agencies VA (Department of Veterans Affairs)	$748,131	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
22	JT West Construction, Inc. Top agencies USAF (Department of the Air Force)	$705,270	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
23	Technologisty LLC Top agencies USAF (Department of the Air Force)	$693,061	0.3%	Rank history: not on the FY2021–FY2024 lists and #23 in FY2025; new, not ranked in Jul 2024–Jun 2025.
24	Portable Air Group LLC Top agencies DLA (Defense Logistics Agency) Army (Department of the Army) Navy (Department of the Navy)	$655,804	0.3%	Rank history: #34 in FY2021, #21 in FY2022, #15 in FY2023, #21 in FY2024 and #40 in FY2025; down 5 since Jul 2024–Jun 2025.
25	Olgoonik General, LLC Top agencies HHS (Department of Health and Human Services)	$652,960	0.3%	Rank history: not on the FY2021–FY2023 lists, #77 in FY2024 and #24 in FY2025; down 5 since Jul 2024–Jun 2025.
26	Sanitz Enterprises, Inc. Top agencies DLA (Defense Logistics Agency)	$570,453	0.3%	Rank history: not on the FY2021–FY2024 lists and #91 in FY2025; new, not ranked in Jul 2024–Jun 2025.
27	TECH Service Solutions LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) VA (Department of Veterans Affairs)	$548,206	0.3%	Rank history: not on the FY2021–FY2024 lists and #50 in FY2025; new, not ranked in Jul 2024–Jun 2025.
28	Aviate Enterprises, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$519,269	0.3%	Rank history: not on the FY2021–FY2022 lists, #52 in FY2023, #59 in FY2024 and #29 in FY2025; new, not ranked in Jul 2024–Jun 2025.
29	Statz Corp Top agencies DLA (Defense Logistics Agency)	$501,654	0.2%	Rank history: not on the FY2021–FY2022 lists, #33 in FY2023, #46 in FY2024 and #78 in FY2025; up 26 since Jul 2024–Jun 2025.
30	Sterileco LLC Top agencies VA (Department of Veterans Affairs) Army (Department of the Army)	$493,213	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
31	Astrea Group for Trading and Contracting Top agencies USAF (Department of the Air Force)	$456,043	0.2%	Rank history: #29 in FY2021, not on the FY2022 list, #30 in FY2023, #66 in FY2024 and #30 in FY2025; up 27 since Jul 2024–Jun 2025.
32	Duncan Mechanical Services, Inc. Top agencies USAF (Department of the Air Force)	$422,994	0.2%	Rank history: #51 in FY2021, not on the FY2022–FY2024 lists and #33 in FY2025; new, not ranked in Jul 2024–Jun 2025.
33	William A. Harrison, Inc. Top agencies DOT (Department of Transportation)	$419,218	0.2%	Rank history: not on the FY2021–FY2022 lists, #46 in FY2023, not on the FY2024 list and #21 in FY2025; up 15 since Jul 2024–Jun 2025.
34	Pelican Residences LLC Top agencies USAF (Department of the Air Force)	$379,723	0.2%	Rank history: not on the FY2021–FY2023 lists, #43 in FY2024 and #37 in FY2025; up 3 since Jul 2024–Jun 2025.
35	Direct Line, Inc. Top agencies Army (Department of the Army)	$376,835	0.2%	Rank history: not on the FY2021–FY2024 lists and #38 in FY2025; new, not ranked in Jul 2024–Jun 2025.
36	Lee Collins Air Conditioning Company Top agencies USAF (Department of the Air Force) DOJ (Department of Justice) Commerce (Department of Commerce)	$366,496	0.2%	Rank history: not on the FY2021–FY2024 lists and #39 in FY2025; up 53 since Jul 2024–Jun 2025.
37	Vcloud GOV Inc. Top agencies Army (Department of the Army) DOE (Department of Energy)	$365,750	0.2%	Rank history: not on the FY2021–FY2025 lists; up 152 since Jul 2024–Jun 2025.
38	Warrior Dynamics LLC Top agencies DOJ (Department of Justice) Army (Department of the Army)	$360,935	0.2%	Rank history: not on the FY2021–FY2024 lists and #20 in FY2025; down 12 since Jul 2024–Jun 2025.
39	Triman Industries Inc. Top agencies DLA (Defense Logistics Agency)	$357,611	0.2%	Rank history: not on the FY2021–FY2025 lists; up 269 since Jul 2024–Jun 2025.
40	H.a. Gray & Associates, Inc. Top agencies USAF (Department of the Air Force)	$338,990	0.2%	Rank history: not on the FY2021–FY2024 lists and #41 in FY2025; new, not ranked in Jul 2024–Jun 2025.
41	Techorbits,Inc. Top agencies Navy (Department of the Navy)	$322,000	0.2%	Rank history: not on the FY2021–FY2024 lists and #44 in FY2025; new, not ranked in Jul 2024–Jun 2025.
42	R P Mechanical Hvacr LLC Top agencies VA (Department of Veterans Affairs)	$293,576	0.1%	Rank history: not on the FY2021–FY2024 lists and #46 in FY2025; new, not ranked in Jul 2024–Jun 2025.
43	Cole-Parmer Instrument Co LLC Top agencies DOL (Department of Labor)	$291,457	0.1%	Rank history: not on the FY2021–FY2024 lists and #47 in FY2025; new, not ranked in Jul 2024–Jun 2025.
44	Allcom Global Services Inc. Through Strantech LLC Top agencies DISA (Defense Information Systems Agency)	$271,851	0.1%	Rank history: not on the FY2021–FY2025 lists; up 158 since Jul 2024–Jun 2025.
45	Amalgamated Services Inc. Top agencies USAF (Department of the Air Force) GSA (General Services Administration) Army (Department of the Army)	$263,512	0.1%	Rank history: not on the FY2021–FY2024 lists and #43 in FY2025; up 71 since Jul 2024–Jun 2025.
46	Xenturis LLC Top agencies USAF (Department of the Air Force)	$263,096	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
47	Next Generation Logistics, LLC Top agencies Army (Department of the Army)	$259,715	0.1%	Rank history: not on the FY2021–FY2024 lists and #9 in FY2025; down 37 since Jul 2024–Jun 2025.
48	Arctic Slope Regional Corporation Through Asrc Federal Facilities Logistics, LLC Top agencies DLA (Defense Logistics Agency)	$257,999	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
49	Sandlapper Controls, Inc. Top agencies USDA (Department of Agriculture)	$242,647	0.1%	Rank history: not on the FY2021 list, #57 in FY2022, not on the FY2023 list, #27 in FY2024 and not on the FY2025 list; new, not ranked in Jul 2024–Jun 2025.
50	BCI Services Inc. Top agencies USAF (Department of the Air Force)	$239,332	0.1%	Rank history: not on the FY2021–FY2023 lists, #86 in FY2024 and #55 in FY2025; up 38 since Jul 2024–Jun 2025.
51	Walco Enterprises Inc. Top agencies USAF (Department of the Air Force)	$233,500	0.1%	Rank history: not on the FY2021–FY2024 lists and #56 in FY2025; new, not ranked in Jul 2024–Jun 2025.
52	Southern Aire Contracting, Inc. Top agencies USAF (Department of the Air Force)	$229,406	0.1%	Rank history: not on the FY2021–FY2024 lists and #58 in FY2025; new, not ranked in Jul 2024–Jun 2025.
53	Nodak Electric & Construction, Inc. Top agencies Army (Department of the Army)	$227,800	0.1%	Rank history: not on the FY2021–FY2024 lists and #59 in FY2025; new, not ranked in Jul 2024–Jun 2025.
54	Save Again.com Top agencies Army (Department of the Army) USAF (Department of the Air Force) DHS (Department of Homeland Security)	$222,620	0.1%	Rank history: not on the FY2021–FY2025 lists; up 229 since Jul 2024–Jun 2025.
55	Fritsch GMBH Top agencies USAF (Department of the Air Force)	$220,984	0.1%	Rank history: not on the FY2021 list, #71 in FY2022, #69 in FY2023, not on the FY2024 list and #60 in FY2025; new, not ranked in Jul 2024–Jun 2025.
56	Ovc-Engineered Solutions LLC Top agencies DLA (Defense Logistics Agency)	$213,022	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
57	Irsa Umar Top agencies USAF (Department of the Air Force)	$212,570	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
58	Trillamed LLC Top agencies VA (Department of Veterans Affairs)	$210,546	0.1%	Rank history: not on the FY2021–FY2024 lists and #63 in FY2025; new, not ranked in Jul 2024–Jun 2025.
59	Gulf Geoexchange and Consulting Services, Inc. Top agencies Army (Department of the Army)	$210,447	0.1%	Rank history: not on the FY2021–FY2024 lists and #64 in FY2025; new, not ranked in Jul 2024–Jun 2025.
60	Technical Laboratory Systems Inc. Top agencies DOT (Department of Transportation)	$200,720	0.1%	Rank history: not on the FY2021–FY2024 lists and #68 in FY2025; new, not ranked in Jul 2024–Jun 2025.
61	Accuair, LLC Top agencies Commerce (Department of Commerce) DHS (Department of Homeland Security)	$198,167	0.1%	Rank history: #43 in FY2021, not on the FY2022 list, #73 in FY2023, not on the FY2024 list and #87 in FY2025; up 123 since Jul 2024–Jun 2025.
62	Alltemp, Inc. Top agencies USAF (Department of the Air Force) Commerce (Department of Commerce)	$188,788	0.1%	Rank history: not on the FY2021–FY2024 lists and #70 in FY2025; new, not ranked in Jul 2024–Jun 2025.
63	Lunday Heating & Cooling Incorporated Top agencies DOI (Department of the Interior)	$188,290	0.1%	Rank history: not on the FY2021–FY2024 lists and #94 in FY2025; new, not ranked in Jul 2024–Jun 2025.
64	Point To Point Systems LLC Top agencies VA (Department of Veterans Affairs)	$187,900	0.1%	Rank history: not on the FY2021–FY2024 lists and #71 in FY2025; new, not ranked in Jul 2024–Jun 2025.
65	Taza Supplies Inc. Top agencies USAF (Department of the Air Force)	$181,786	0.1%	Rank history: not on the FY2021–FY2024 lists and #73 in FY2025; new, not ranked in Jul 2024–Jun 2025.
66	Al-Abdaa Al-Mumayaz Company Top agencies Army (Department of the Army)	$180,000	0.1%	Rank history: not on the FY2021–FY2024 lists and #74 in FY2025; new, not ranked in Jul 2024–Jun 2025.
67	Chase Supply, Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$177,106	0.1%	Rank history: not on the FY2021–FY2024 lists and #99 in FY2025; up 53 since Jul 2024–Jun 2025.
68	CACI International Inc. Through Caci, Inc. - Federal Top agencies USAF (Department of the Air Force)	$175,382	0.1%	Rank history: not on the FY2021–FY2024 lists and #76 in FY2025; new, not ranked in Jul 2024–Jun 2025.
69	Westex Group, Inc. Top agencies USAF (Department of the Air Force)	$174,005	0.1%	Rank history: not on the FY2021–FY2024 lists and #81 in FY2025; up 11 since Jul 2024–Jun 2025.
70	Suncore Distribution LLC Top agencies Army (Department of the Army)	$164,815	0.1%	Rank history: not on the FY2021–FY2024 lists and #83 in FY2025; up 61 since Jul 2024–Jun 2025.
71	KSC Federal Contractors LLC Top agencies USAF (Department of the Air Force)	$161,500	0.1%	Rank history: not on the FY2021–FY2024 lists and #85 in FY2025; new, not ranked in Jul 2024–Jun 2025.
72	Kampi Components Co Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$159,785	0.1%	Rank history: #18 in FY2021, #54 in FY2022, #35 in FY2023, #20 in FY2024 and #19 in FY2025; down 57 since Jul 2024–Jun 2025.
73	Fiorini Impianti Group SRL Top agencies Army (Department of the Army)	$159,092	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
74	Johnson Controls Inc 3 awardees, including Johnson Controls Industries and Johnson Controls Building Solutions, LLC Top agencies DOS (Department of State) USAF (Department of the Air Force) WHS (DOD Washington Headquarters Service)	$157,242	0.1%	Rank history: not on the FY2021–FY2023 lists, #47 in FY2024 and #42 in FY2025; down 49 since Jul 2024–Jun 2025.
75	Katilyst Company LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$154,847	0.1%	Rank history: not on the FY2021–FY2023 lists, #52 in FY2024 and not on the FY2025 list; down 29 since Jul 2024–Jun 2025.
76	Sunbelt Rentals Inc. Top agencies USAF (Department of the Air Force) DOJ (Department of Justice)	$150,832	0.1%	Rank history: not on the FY2021–FY2024 lists and #80 in FY2025; up 51 since Jul 2024–Jun 2025.
77	Shafer-Anderson Holdings, LLC Top agencies USAF (Department of the Air Force)	$143,942	0.1%	Rank history: not on the FY2021–FY2024 lists and #93 in FY2025; new, not ranked in Jul 2024–Jun 2025.
78	Meak Solutions Llc. Top agencies Army (Department of the Army)	$140,229	0.1%	Rank history: not on the FY2021–FY2023 lists, #44 in FY2024 and #26 in FY2025; down 56 since Jul 2024–Jun 2025.
79	Comsis Solutions LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$134,597	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
80	Midwestern Mechanical, Inc. Top agencies USDA (Department of Agriculture)	$133,356	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
81	Red Orange North America Top agencies Army (Department of the Army)	$132,628	0.1%	Rank history: not on the FY2021–FY2024 lists and #97 in FY2025; new, not ranked in Jul 2024–Jun 2025.
82	Parker-Hannifin Corp Top agencies DLA (Defense Logistics Agency)	$131,768	0.1%	Rank history: not on the FY2021–FY2025 lists; up 96 since Jul 2024–Jun 2025.
83	Capp LLC Top agencies Army (Department of the Army) DOJ (Department of Justice) Navy (Department of the Navy)	$131,013	0.1%	Rank history: not on the FY2021–FY2022 lists, #68 in FY2023, #93 in FY2024 and #53 in FY2025; down 18 since Jul 2024–Jun 2025.
84	Nakamura Kizai Y.k. Top agencies USAF (Department of the Air Force)	$130,966	0.1%	Rank history: not on the FY2021–FY2024 lists and #100 in FY2025; new, not ranked in Jul 2024–Jun 2025.
85	Vision Contracting Inc. Top agencies USDA (Department of Agriculture)	$128,819	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
86	Results Sales & Service, L.L.C. Top agencies VA (Department of Veterans Affairs)	$127,725	0.1%	Rank history: not on the FY2021–FY2023 lists, #28 in FY2024 and #45 in FY2025; down 42 since Jul 2024–Jun 2025.
87	Pioneer Industries, LLC Top agencies DLA (Defense Logistics Agency)	$122,445	0.1%	Rank history: #79 in FY2021 and not on the FY2022–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
88	Coil Winding Specialist, Inc. Top agencies DOE (Department of Energy) USAF (Department of the Air Force)	$120,910	0.1%	Rank history: not on the FY2021–FY2023 lists, #99 in FY2024 and #75 in FY2025; down 37 since Jul 2024–Jun 2025.
89	Pate Ventures, LLC Top agencies Army (Department of the Army)	$117,000	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
90	Arhab LLC Top agencies Army (Department of the Army)	$115,293	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
91	Tropic Supply Inc. Top agencies DOJ (Department of Justice)	$103,265	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
92	Kyodo Shipping & Trading Corp USA Top agencies DLA (Defense Logistics Agency)	$102,627	<0.1%	Rank history: not on the FY2021–FY2025 lists; up 96 since Jul 2024–Jun 2025.
93	Rocky Mechanical LLC Top agencies USAF (Department of the Air Force)	$101,805	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
94	DVD Construction Inc. Top agencies Army (Department of the Army)	$101,538	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
95	Larkos Packing and Distribution Inc. Top agencies DLA (Defense Logistics Agency)	$100,005	<0.1%	Rank history: not on the FY2021–FY2025 lists; up 218 since Jul 2024–Jun 2025.
96	Competition Unlimited Corporation Top agencies USAF (Department of the Air Force)	$98,550	<0.1%	Rank history: not on the FY2021–FY2024 lists and #35 in FY2025; down 51 since Jul 2024–Jun 2025.
97	Mechanical Cooling Services, LLC Top agencies DOJ (Department of Justice)	$98,000	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
98	Frio Clima Valentin SL Top agencies Navy (Department of the Navy)	$94,579	<0.1%	Rank history: not on the FY2021–FY2022 lists, #77 in FY2023 and not on the FY2024–FY2025 lists; up 96 since Jul 2024–Jun 2025.
99	Professional Heating & Cooling, Inc. Top agencies Navy (Department of the Navy)	$94,437	<0.1%	Rank history: not on the FY2021–FY2024 lists and #28 in FY2025; down 71 since Jul 2024–Jun 2025.
100	Government of the United States Through Federal Prison Industries, Inc. Top agencies Army (Department of the Army)	$92,704	<0.1%	Rank history: #81 in FY2021, #81 in FY2022, #37 in FY2023, #31 in FY2024 and #65 in FY2025; down 31 since Jul 2024–Jun 2025.

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100 of 290 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 $205 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.
Period: the trailing 12 months end with the last month that ended at least 90 days ago, because the Department of Defense reports its contract actions to FPDS about 90 days late. The list is rebuilt each night.
Rank changes compare with Jul 2024–Jun 2025. "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.
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 PSC 4120 contractors in Jul 2025–Jun 2026?

1. Johnson Controls Navy Systems, LLC ($69.6M), 2. Simulation Technologies Inc ($49.7M), 3. Atap Inc. ($13.9M), 4. HDT Expeditionary Systems Inc. ($11.8M), 5. Cam Management and Services, LLC ($6M), 6. Snowbird Technologies Inc. ($4.91M), 7. Alvest (USA) Inc. ($2.51M), 8. Aantilia LLC ($2.4M), 9. Windward Enterprises, LLC ($2.04M), 10. Trane U.s. Inc. ($1.9M).

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