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

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Johnson Controls Federal Systems, LLC 2 awardees, including Johnson Controls Navy Systems, LLC Top agencies Navy (Department of the Navy)	$75,196,110	35.2%	Rank history: not on the FY2021–FY2024 lists and #2 in FY2025; new, not ranked in Aug 2024–Jul 2025.
2	Simulation Technologies Inc Top agencies Army (Department of the Army)	$49,664,136	23.2%	Rank history: not on the FY2021–FY2024 lists and #1 in FY2025; new, not ranked in Aug 2024–Jul 2025.
3	Atap Inc. Top agencies USAF (Department of the Air Force)	$13,921,741	6.5%	Rank history: not on the FY2021–FY2022 lists, #22 in FY2023, #10 in FY2024 and not on the FY2025 list; new, not ranked in Aug 2024–Jul 2025.
4	Cam Management and Services, LLC Top agencies USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$6,144,747	2.9%	Rank history: not on the FY2021–FY2023 lists, #11 in FY2024 and #5 in FY2025; unchanged since Aug 2024–Jul 2025.
5	Snowbird Technologies Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$5,616,654	2.6%	Rank history: not on the FY2021 list, #61 in FY2022, not on the FY2023 list, #13 in FY2024 and #6 in FY2025; up 1 since Aug 2024–Jul 2025.
6	HDT Expeditionary Systems Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$4,951,580	2.3%	Rank history: not on the FY2021–FY2023 lists, #9 in FY2024 and #4 in FY2025; down 3 since Aug 2024–Jul 2025.
7	Gas Turbine Efficiency LLC Top agencies USAF (Department of the Air Force)	$4,482,311	2.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
8	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 48 since Aug 2024–Jul 2025.
9	Trane U.s. Inc. Top agencies DOJ (Department of Justice) USAF (Department of the Air Force) VA (Department of Veterans Affairs)	$2,437,528	1.1%	Rank history: #7 in FY2021, #5 in FY2022, #6 in FY2023, #7 in FY2024 and #12 in FY2025; down 2 since Aug 2024–Jul 2025.
10	Windward Enterprises, LLC Top agencies DLA (Defense Logistics Agency)	$2,176,445	1.0%	Rank history: #9 in FY2021, not on the FY2022 list, #45 in FY2023, #33 in FY2024 and #15 in FY2025; up 10 since Aug 2024–Jul 2025.
11	Advanced Cooling Technologies Inc. Top agencies NASA (National Aeronautics and Space Administration)	$2,085,154	1.0%	Rank history: not on the FY2021–FY2022 lists, #65 in FY2023, #5 in FY2024 and #13 in FY2025; up 42 since Aug 2024–Jul 2025.
12	Honeywell International Inc. 2 awardees Top agencies DLA (Defense Logistics Agency)	$1,899,000	0.9%	Rank history: not on the FY2021–FY2022 lists, #34 in FY2023, #15 in FY2024 and not on the FY2025 list; up 23 since Aug 2024–Jul 2025.
13	Aantilia LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$1,826,752	0.9%	Rank history: #87 in FY2021, #66 in FY2022, #51 in FY2023, not on the FY2024 list and #8 in FY2025; up 11 since Aug 2024–Jul 2025.
14	Accentz, Inc. Top agencies USAF (Department of the Air Force) DHS (Department of Homeland Security)	$1,520,928	0.7%	Rank history: #37 in FY2021, #20 in FY2022, #16 in FY2023, #19 in FY2024 and #7 in FY2025; down 6 since Aug 2024–Jul 2025.
15	Reon Inc. Top agencies HHS (Department of Health and Human Services)	$1,478,715	0.7%	Rank history: not on the FY2021–FY2022 lists, #36 in FY2023, #38 in FY2024 and #36 in FY2025; new, not ranked in Aug 2024–Jul 2025.
16	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 Aug 2024–Jul 2025.
17	Snodgrass Contracting LLC Top agencies HHS (Department of Health and Human Services)	$1,364,359	0.6%	Rank history: not on the FY2021 list, #11 in FY2022, #14 in FY2023, #14 in FY2024 and #11 in FY2025; down 7 since Aug 2024–Jul 2025.
18	Aggreko LLC 2 awardees Top agencies Army (Department of the Army) VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$1,278,741	0.6%	Rank history: not on the FY2021–FY2024 lists and #17 in FY2025; up 21 since Aug 2024–Jul 2025.
19	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 Aug 2024–Jul 2025.
20	AKS Industries Inc. Top agencies DLA (Defense Logistics Agency)	$1,008,761	0.5%	Rank history: not on the FY2021–FY2024 lists and #10 in FY2025; down 9 since Aug 2024–Jul 2025.
21	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 Aug 2024–Jul 2025.
22	Portable Air Group LLC Top agencies DLA (Defense Logistics Agency) Army (Department of the Army) VA (Department of Veterans Affairs)	$805,882	0.4%	Rank history: #34 in FY2021, #21 in FY2022, #15 in FY2023, #21 in FY2024 and #41 in FY2025; down 4 since Aug 2024–Jul 2025.
23	Atlantic Diving Supply, Inc. Top agencies DLA (Defense Logistics Agency)	$762,873	0.4%	Rank history: not on the FY2021–FY2023 lists, #34 in FY2024 and #22 in FY2025; down 1 since Aug 2024–Jul 2025.
24	American Air Filter Company Inc. 2 awardees, including Thermosystems, LLC and Daikin Applied Americas Inc. Top agencies USDA (Department of Agriculture) DOS (Department of State)	$759,439	0.4%	Rank history: #66 in FY2021, #27 in FY2022, #32 in FY2023, #24 in FY2024 and #25 in FY2025; down 9 since Aug 2024–Jul 2025.
25	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 Aug 2024–Jul 2025.
26	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 Aug 2024–Jul 2025.
27	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 Aug 2024–Jul 2025.
28	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 9 since Aug 2024–Jul 2025.
29	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 Aug 2024–Jul 2025.
30	Aviate Enterprises, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$519,269	0.2%	Rank history: not on the FY2021–FY2022 lists, #52 in FY2023, #59 in FY2024 and #29 in FY2025; new, not ranked in Aug 2024–Jul 2025.
31	Colombara SRL Top agencies Army (Department of the Army)	$505,289	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
32	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 23 since Aug 2024–Jul 2025.
33	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 Aug 2024–Jul 2025.
34	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 25 since Aug 2024–Jul 2025.
35	GMS Industrial Supply, Inc. Through Sanitz Enterprises, Inc. Top agencies DLA (Defense Logistics Agency)	$425,448	0.2%	Rank history: not on the FY2021–FY2024 lists and #91 in FY2025; new, not ranked in Aug 2024–Jul 2025.
36	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 Aug 2024–Jul 2025.
37	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 7 since Aug 2024–Jul 2025.
38	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 #38 in FY2025; up 7 since Aug 2024–Jul 2025.
39	Direct Line, Inc. Top agencies Army (Department of the Army)	$376,835	0.2%	Rank history: not on the FY2021–FY2024 lists and #39 in FY2025; new, not ranked in Aug 2024–Jul 2025.
40	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 158 since Aug 2024–Jul 2025.
41	Lee Collins Air Conditioning Company Top agencies USAF (Department of the Air Force) DOJ (Department of Justice) Commerce (Department of Commerce)	$364,489	0.2%	Rank history: not on the FY2021–FY2024 lists and #40 in FY2025; up 29 since Aug 2024–Jul 2025.
42	Triman Industries Inc. Top agencies DLA (Defense Logistics Agency)	$357,611	0.2%	Rank history: not on the FY2021–FY2025 lists; up 264 since Aug 2024–Jul 2025.
43	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 #42 in FY2025; new, not ranked in Aug 2024–Jul 2025.
44	Save Again.com Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$332,115	0.2%	Rank history: not on the FY2021–FY2025 lists; up 246 since Aug 2024–Jul 2025.
45	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 Aug 2024–Jul 2025.
46	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 Aug 2024–Jul 2025.
47	Outdoor Venture Corp Through Ovc-Engineered Solutions LLC Top agencies DLA (Defense Logistics Agency)	$289,194	0.1%	Rank history: not on the FY2021 list, #44 in FY2022, not on the FY2023 list, #65 in FY2024 and not on the FY2025 list; new, not ranked in Aug 2024–Jul 2025.
48	Tyco Fire Products LP 4 awardees, including Johnson Controls Building Solutions, LLC, Johnson Controls Industries and Johnson Controls, Inc. Top agencies VA (Department of Veterans Affairs) DOS (Department of State) DOJ (Department of Justice)	$288,171	0.1%	Rank history: not on the FY2021–FY2023 lists, #47 in FY2024 and #37 in FY2025; down 22 since Aug 2024–Jul 2025.
49	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 160 since Aug 2024–Jul 2025.
50	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 Aug 2024–Jul 2025.
51	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 Aug 2024–Jul 2025.
52	Amalgamated Services Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$241,810	0.1%	Rank history: not on the FY2021–FY2024 lists and #43 in FY2025; up 67 since Aug 2024–Jul 2025.
53	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 35 since Aug 2024–Jul 2025.
54	Fritsch GMBH Top agencies USAF (Department of the Air Force)	$237,075	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 Aug 2024–Jul 2025.
55	Terry Service, Inc. Top agencies DOJ (Department of Justice)	$236,975	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
56	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 Aug 2024–Jul 2025.
57	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 Aug 2024–Jul 2025.
58	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 Aug 2024–Jul 2025.
59	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 Aug 2024–Jul 2025.
60	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 Aug 2024–Jul 2025.
61	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 Aug 2024–Jul 2025.
62	Rome Solutions LLC Top agencies USAF (Department of the Air Force)	$208,386	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
63	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 Aug 2024–Jul 2025.
64	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 129 since Aug 2024–Jul 2025.
65	Fidelity Engineering, LLC 2 awardees, including CT / HX, LLC and Metro Building Services, LLC Top agencies DOJ (Department of Justice) Army (Department of the Army)	$194,980	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
66	DW Solutions, LLC Top agencies DLA (Defense Logistics Agency)	$193,198	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
67	Coolsys Commercial & Industrial Solutions Inc. Top agencies VA (Department of Veterans Affairs)	$190,925	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
68	Vision Contracting Inc. Top agencies USDA (Department of Agriculture)	$190,363	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
69	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 Aug 2024–Jul 2025.
70	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 Aug 2024–Jul 2025.
71	Sunbelt Rentals, Inc. Top agencies DOJ (Department of Justice) USAF (Department of the Air Force) VA (Department of Veterans Affairs)	$182,186	0.1%	Rank history: not on the FY2021–FY2024 lists and #80 in FY2025; up 52 since Aug 2024–Jul 2025.
72	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 Aug 2024–Jul 2025.
73	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 52 since Aug 2024–Jul 2025.
74	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 Aug 2024–Jul 2025.
75	Alltemp, Inc. Top agencies USAF (Department of the Air Force)	$173,008	0.1%	Rank history: not on the FY2021–FY2024 lists and #70 in FY2025; up 189 since Aug 2024–Jul 2025.
76	Kampi Components Co Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$164,590	0.1%	Rank history: #18 in FY2021, #54 in FY2022, #35 in FY2023, #20 in FY2024 and #19 in FY2025; down 62 since Aug 2024–Jul 2025.
77	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 Aug 2024–Jul 2025.
78	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 Aug 2024–Jul 2025.
79	Adrick Marine Group, Inc. Top agencies DHS (Department of Homeland Security)	$156,559	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
80	FSR Consulting LLC Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$147,642	0.1%	Rank history: not on the FY2021–FY2024 lists and #77 in FY2025; up 66 since Aug 2024–Jul 2025.
81	Fed Crew Inc. Top agencies Army (Department of the Army)	$146,518	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
82	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 Aug 2024–Jul 2025.
83	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 60 since Aug 2024–Jul 2025.
84	Warrior Dynamics LLC Top agencies Army (Department of the Army)	$137,935	0.1%	Rank history: not on the FY2021–FY2024 lists and #20 in FY2025; down 63 since Aug 2024–Jul 2025.
85	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 Aug 2024–Jul 2025.
86	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 Aug 2024–Jul 2025.
87	Next Generation Logistics, LLC Top agencies Army (Department of the Army)	$133,215	0.1%	Rank history: not on the FY2021–FY2024 lists and #9 in FY2025; down 78 since Aug 2024–Jul 2025.
88	C & C Boiler Sales & Service Inc. Top agencies DOJ (Department of Justice)	$133,000	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
89	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 Aug 2024–Jul 2025.
90	Parker-Hannifin Corp Top agencies DLA (Defense Logistics Agency)	$131,768	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
91	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 49 since Aug 2024–Jul 2025.
92	Suncore Distribution LLC Top agencies Army (Department of the Army)	$127,310	0.1%	Rank history: not on the FY2021–FY2024 lists and #83 in FY2025; up 18 since Aug 2024–Jul 2025.
93	Heico Corp Through Pioneer Industries, LLC Top agencies DLA (Defense Logistics Agency)	$122,445	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
94	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 44 since Aug 2024–Jul 2025.
95	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 Aug 2024–Jul 2025.
96	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 Aug 2024–Jul 2025.
97	Radwell International LLC Through Capp LLC Top agencies Army (Department of the Army) DOJ (Department of Justice) DOS (Department of State)	$113,141	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
98	Katilyst Company LLC Top agencies Army (Department of the Army)	$113,097	0.1%	Rank history: not on the FY2021–FY2023 lists, #52 in FY2024 and not on the FY2025 list; down 61 since Aug 2024–Jul 2025.
99	Cummings Heating & Cooling Wholesale Distributing, Inc. Top agencies DOJ (Department of Justice)	$106,489	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
100	Government of the United States Through Federal Prison Industries, Inc. Top agencies Army (Department of the Army)	$104,169	<0.1%	Rank history: #81 in FY2021, #81 in FY2022, #37 in FY2023, #31 in FY2024 and #65 in FY2025; down 33 since Aug 2024–Jul 2025.

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 $214 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. An awardee whose own actions mostly name no parent, and that no other company's actions name as their parent, rolls up its SAM.gov registration's chain of parent companies: it counts under the first company there that other companies' actions name as their parent, or under the parent most of a company's own actions name, whichever comes first; with neither, under the highest company in the chain with federal contracts of its own. Joint ventures stay companies of their own. 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 Aug 2024–Jul 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