Top 100 Contractors in PSC J043: Maintenance, Repair and Rebuilding of Equipment: Pumps and Compressors, Aug 2025–Jul 2026

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Persimmon Grove LLC Top agencies DOI (Department of the Interior)	$2,467,113	12.4%	Rank history: not on the FY2021–FY2022 lists, #5 in FY2023, #8 in FY2024 and #21 in FY2025; up 36 since Aug 2024–Jul 2025.
2	B2 Constructors, LLC Top agencies USAF (Department of the Air Force)	$1,554,079	7.8%	Rank history: not on the FY2021–FY2024 lists and #1 in FY2025; new, not ranked in Aug 2024–Jul 2025.
3	Charles Mann Enterprises, LLC Top agencies Treasury (Department of the Treasury)	$1,272,615	6.4%	Rank history: not on the FY2021–FY2024 lists and #4 in FY2025; up 44 since Aug 2024–Jul 2025.
4	Tencarva Machinery Company, LLC Top agencies USAF (Department of the Air Force)	$1,245,700	6.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
5	Gas Turbine Engines Inc. Top agencies USAF (Department of the Air Force)	$1,015,560	5.1%	Rank history: not on the FY2021–FY2024 lists and #3 in FY2025; down 1 since Aug 2024–Jul 2025.
6	Mielke Mechanical Inc. Top agencies NASA (National Aeronautics and Space Administration)	$572,248	2.9%	Rank history: not on the FY2021–FY2024 lists and #7 in FY2025; new, not ranked in Aug 2024–Jul 2025.
7	Mash Industrial Repairs, Inc. Top agencies VA (Department of Veterans Affairs)	$449,892	2.3%	Rank history: #38 in FY2021, #12 in FY2022, not on the FY2023 list, #15 in FY2024 and #15 in FY2025; up 12 since Aug 2024–Jul 2025.
8	Canyon Industries Inc. Top agencies DOI (Department of the Interior)	$428,998	2.2%	Rank history: not on the FY2021–FY2024 lists and #13 in FY2025; new, not ranked in Aug 2024–Jul 2025.
9	RIX Industries Top agencies Navy (Department of the Navy)	$387,040	1.9%	Rank history: #8 in FY2021, #3 in FY2022, #6 in FY2023, not on the FY2024 list and #28 in FY2025; up 21 since Aug 2024–Jul 2025.
10	Rotating Services, LLC Top agencies USAF (Department of the Air Force)	$373,449	1.9%	Rank history: #30 in FY2021, #28 in FY2022, #35 in FY2023, #31 in FY2024 and #79 in FY2025; up 69 since Aug 2024–Jul 2025.
11	V2X, Inc. Through V2X Systems LLC Top agencies Navy (Department of the Navy)	$350,000	1.8%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
12	RWH Capital LLC Top agencies VA (Department of Veterans Affairs)	$338,628	1.7%	Rank history: not on the FY2021–FY2024 lists and #22 in FY2025; up 9 since Aug 2024–Jul 2025.
13	Maguire Iron, Inc. Top agencies DOI (Department of the Interior)	$334,053	1.7%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
14	D & D Compressor Service, Inc. Top agencies VA (Department of Veterans Affairs)	$329,000	1.6%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
15	Triangle Manifold Services, Inc. Top agencies VA (Department of Veterans Affairs)	$291,520	1.5%	Rank history: #54 in FY2021, #22 in FY2022, #30 in FY2023, #26 in FY2024 and #18 in FY2025; up 18 since Aug 2024–Jul 2025.
16	West Coast Dirt Works LLC Top agencies DOI (Department of the Interior)	$255,463	1.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
17	Atlas Copco Rental LLC 5 awardees, including Quincy Compressor LLC, Atlas Copco Comptec LLC and Beaconmedaes LLC Top agencies USAF (Department of the Air Force) VA (Department of Veterans Affairs) USDA (Department of Agriculture)	$249,312	1.3%	Rank history: not on the FY2021–FY2022 lists, #23 in FY2023, #24 in FY2024 and #36 in FY2025; up 6 since Aug 2024–Jul 2025.
18	OST Services, LLC Top agencies VA (Department of Veterans Affairs)	$248,000	1.2%	Rank history: not on the FY2021–FY2024 lists and #14 in FY2025; up 36 since Aug 2024–Jul 2025.
19	Mechanical Maintenance, Inc. Top agencies VA (Department of Veterans Affairs)	$230,725	1.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
20	Compliance Solutions LLC Top agencies VA (Department of Veterans Affairs)	$223,261	1.1%	Rank history: not on the FY2021–FY2024 lists and #68 in FY2025; new, not ranked in Aug 2024–Jul 2025.
21	Arktic Temp of Mississippi, LLC Top agencies USDA (Department of Agriculture)	$209,565	1.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
22	Compressed Air Power, Inc. Top agencies USAF (Department of the Air Force)	$204,393	1.0%	Rank history: #31 in FY2021, #33 in FY2022, #26 in FY2023, #27 in FY2024 and #31 in FY2025; up 9 since Aug 2024–Jul 2025.
23	Veterans Elite Inc Top agencies VA (Department of Veterans Affairs)	$185,379	0.9%	Rank history: not on the FY2021 list, #73 in FY2022, #55 in FY2023, #81 in FY2024 and #41 in FY2025; up 61 since Aug 2024–Jul 2025.
24	S-T Acquisition Co LLC Top agencies VA (Department of Veterans Affairs)	$180,972	0.9%	Rank history: not on the FY2021–FY2024 lists and #29 in FY2025; up 8 since Aug 2024–Jul 2025.
25	MGI Inc. Top agencies VA (Department of Veterans Affairs)	$168,326	0.8%	Rank history: not on the FY2021–FY2023 lists, #61 in FY2024 and #76 in FY2025; up 41 since Aug 2024–Jul 2025.
26	DXP Enterprises, Inc. Top agencies DOI (Department of the Interior) USAF (Department of the Air Force)	$165,867	0.8%	Rank history: not on the FY2021–FY2023 lists, #50 in FY2024 and #12 in FY2025; down 14 since Aug 2024–Jul 2025.
27	Curtiss-Wright Electro-Mechanical Corporation 2 awardees Top agencies Navy (Department of the Navy)	$157,283	0.8%	Rank history: not on the FY2021–FY2024 lists and #19 in FY2025; new, not ranked in Aug 2024–Jul 2025.
28	Johnson Controls Security Solutions LLC Through Johnson Controls Inc. Top agencies VA (Department of Veterans Affairs)	$153,112	0.8%	Rank history: not on the FY2021 list, #21 in FY2022, #46 in FY2023, #54 in FY2024 and #45 in FY2025; up 22 since Aug 2024–Jul 2025.
29	Technical Systems Specialties Corporation Top agencies VA (Department of Veterans Affairs)	$150,390	0.8%	Rank history: not on the FY2021–FY2024 lists and #59 in FY2025; new, not ranked in Aug 2024–Jul 2025.
30	Cold LLC Top agencies Navy (Department of the Navy)	$145,464	0.7%	Rank history: not on the FY2021 list, #6 in FY2022, #20 in FY2023, #57 in FY2024 and #11 in FY2025; down 12 since Aug 2024–Jul 2025.
31	Arkansas Industrial Machinery, Inc. Top agencies USAF (Department of the Air Force)	$143,789	0.7%	Rank history: not on the FY2021–FY2023 lists, #51 in FY2024 and #54 in FY2025; up 28 since Aug 2024–Jul 2025.
32	RWH Energy LLC Top agencies VA (Department of Veterans Affairs)	$139,249	0.7%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
33	Kalus Kuehlwassertechnik GMBH Top agencies Army (Department of the Army)	$134,973	0.7%	Rank history: #42 in FY2021, #48 in FY2022, #61 in FY2023, #63 in FY2024 and #49 in FY2025; up 2 since Aug 2024–Jul 2025.
34	Reagent World Inc. Top agencies DOI (Department of the Interior)	$128,686	0.6%	Rank history: not on the FY2021–FY2024 lists and #40 in FY2025; new, not ranked in Aug 2024–Jul 2025.
35	Venergy Group LLC Top agencies VA (Department of Veterans Affairs)	$127,585	0.6%	Rank history: not on the FY2021–FY2024 lists and #74 in FY2025; new, not ranked in Aug 2024–Jul 2025.
36	On-Line Compressor Inc. Top agencies VA (Department of Veterans Affairs)	$125,191	0.6%	Rank history: not on the FY2021–FY2024 lists and #33 in FY2025; up 2 since Aug 2024–Jul 2025.
37	Barque Consulting, LLC Top agencies VA (Department of Veterans Affairs)	$125,154	0.6%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
38	Aerolab Inc. Top agencies Navy (Department of the Navy)	$124,940	0.6%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
39	BBJ Electric Inc Top agencies Treasury (Department of the Treasury)	$115,210	0.6%	Rank history: not on the FY2021–FY2023 lists, #84 in FY2024 and #67 in FY2025; up 86 since Aug 2024–Jul 2025.
40	JWC Environmental Inc. 2 awardees, including Sulzer Pump Services US Inc. Top agencies DOJ (Department of Justice)	$111,585	0.6%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
41	Tyco Fire Products LP Through Johnson Controls Building Solutions, LLC Top agencies USDA (Department of Agriculture) VA (Department of Veterans Affairs)	$110,021	0.6%	Rank history: not on the FY2021–FY2023 lists, #42 in FY2024 and not on the FY2025 list; up 61 since Aug 2024–Jul 2025.
42	Power Systems International, Ltd. Top agencies Army (Department of the Army)	$106,474	0.5%	Rank history: not on the FY2021–FY2023 lists, #1 in FY2024 and #50 in FY2025; down 41 since Aug 2024–Jul 2025.
43	Phoenix Pumps Inc. Top agencies DOI (Department of the Interior)	$100,000	0.5%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
44	Jada Contracting & Construction LLC Top agencies VA (Department of Veterans Affairs)	$89,383	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
45	Sterileco LLC Top agencies VA (Department of Veterans Affairs)	$87,044	0.4%	Rank history: not on the FY2021–FY2023 lists, #44 in FY2024 and #53 in FY2025; up 1 since Aug 2024–Jul 2025.
46	AOS Services Inc. Top agencies USAF (Department of the Air Force)	$82,542	0.4%	Rank history: not on the FY2021–FY2025 lists; up 92 since Aug 2024–Jul 2025.
47	RON Whites Air Compressor Sales Inc. Top agencies USAF (Department of the Air Force)	$80,649	0.4%	Rank history: #36 in FY2021, #60 in FY2022, not on the FY2023 list, #74 in FY2024 and not on the FY2025 list; up 34 since Aug 2024–Jul 2025.
48	Kaeser Compressors, Inc. Top agencies Navy (Department of the Navy) VA (Department of Veterans Affairs) Treasury (Department of the Treasury)	$77,583	0.4%	Rank history: not on the FY2021–FY2024 lists and #80 in FY2025; up 23 since Aug 2024–Jul 2025.
49	BOC Water Hydraulics LLC Top agencies Army (Department of the Army)	$77,059	0.4%	Rank history: not on the FY2021–FY2024 lists and #99 in FY2025; up 54 since Aug 2024–Jul 2025.
50	Air Power Services, Inc. Top agencies USAF (Department of the Air Force)	$76,573	0.4%	Rank history: #65 in FY2021, #56 in FY2022, #62 in FY2023, not on the FY2024 list and #82 in FY2025; new, not ranked in Aug 2024–Jul 2025.
51	Air Systems and Pump Solutions, L.L.C. Top agencies USAF (Department of the Air Force)	$76,460	0.4%	Rank history: not on the FY2021–FY2024 lists and #56 in FY2025; up 12 since Aug 2024–Jul 2025.
52	Miller Electric Company Inc. Top agencies Army (Department of the Army)	$74,242	0.4%	Rank history: not on the FY2021–FY2022 lists, #75 in FY2023, #70 in FY2024 and #65 in FY2025; up 18 since Aug 2024–Jul 2025.
53	Grundfos CBS Inc. Top agencies DOI (Department of the Interior)	$72,736	0.4%	Rank history: not on the FY2021–FY2024 lists and #58 in FY2025; new, not ranked in Aug 2024–Jul 2025.
54	Heritage Hydro Governor Service Inc. Top agencies DOI (Department of the Interior) Army (Department of the Army)	$72,484	0.4%	Rank history: #89 in FY2021, #35 in FY2022, #72 in FY2023 and not on the FY2024–FY2025 lists; up 148 since Aug 2024–Jul 2025.
55	Delray Industries LLC Top agencies Navy (Department of the Navy)	$72,406	0.4%	Rank history: not on the FY2021–FY2022 lists, #98 in FY2023, not on the FY2024 list and #97 in FY2025; up 52 since Aug 2024–Jul 2025.
56	Mills Marine & Ship Repair LLC Top agencies USAF (Department of the Air Force)	$70,727	0.4%	Rank history: not on the FY2021 list, #51 in FY2022, #59 in FY2023, #58 in FY2024 and #52 in FY2025; up 2 since Aug 2024–Jul 2025.
57	1831 Logistics L.L.C. Top agencies USDA (Department of Agriculture)	$69,042	0.3%	Rank history: not on the FY2021–FY2024 lists and #61 in FY2025; new, not ranked in Aug 2024–Jul 2025.
58	Merp-Emi Mission Support LLC Top agencies Navy (Department of the Navy)	$67,332	0.3%	Rank history: not on the FY2021–FY2024 lists and #64 in FY2025; new, not ranked in Aug 2024–Jul 2025.
59	USA Pumps 24 Limited Liability Company Top agencies USAF (Department of the Air Force)	$65,834	0.3%	Rank history: not on the FY2021–FY2024 lists and #66 in FY2025; new, not ranked in Aug 2024–Jul 2025.
60	Advanced Mechanical Services, LLC Top agencies VA (Department of Veterans Affairs)	$65,496	0.3%	Rank history: not on the FY2021–FY2023 lists, #73 in FY2024 and #73 in FY2025; up 16 since Aug 2024–Jul 2025.
61	Springfield Solutions LLC Top agencies USAF (Department of the Air Force)	$63,649	0.3%	Rank history: not on the FY2021–FY2024 lists and #69 in FY2025; new, not ranked in Aug 2024–Jul 2025.
62	W.c. Weil PM LLC Top agencies VA (Department of Veterans Affairs)	$63,035	0.3%	Rank history: #56 in FY2021 and not on the FY2022–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
63	Atlantic Compressor & Vacuum, Inc. Top agencies VA (Department of Veterans Affairs)	$54,081	0.3%	Rank history: #83 in FY2021, #81 in FY2022, #73 in FY2023, #80 in FY2024 and #77 in FY2025; up 138 since Aug 2024–Jul 2025.
64	Boiler Chiller Systems, LLC Top agencies VA (Department of Veterans Affairs)	$53,500	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
65	Inden Solutions Group Inc. Top agencies USAF (Department of the Air Force)	$52,730	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
66	Dis Northwest Inc. Top agencies USDA (Department of Agriculture)	$52,579	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
67	Autotech Solutions, LLC Top agencies USAF (Department of the Air Force)	$49,196	0.2%	Rank history: not on the FY2021–FY2025 lists; up 120 since Aug 2024–Jul 2025.
68	LN Curtis & Sons Top agencies USAF (Department of the Air Force)	$46,884	0.2%	Rank history: not on the FY2021 list, #92 in FY2022, not on the FY2023 list, #65 in FY2024 and #83 in FY2025; down 19 since Aug 2024–Jul 2025.
69	Industrial Supply & Service, L.L.C. Top agencies VA (Department of Veterans Affairs)	$46,308	0.2%	Rank history: #80 in FY2021 and not on the FY2022–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
70	Atlantic First Industries Corporation Top agencies VA (Department of Veterans Affairs)	$42,786	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
71	Paula F Price Enterprises LLC Top agencies VA (Department of Veterans Affairs)	$42,751	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
72	Coats Pump & Supply Inc. Top agencies DOI (Department of the Interior)	$41,787	0.2%	Rank history: not on the FY2021–FY2023 lists, #82 in FY2024 and not on the FY2025 list; new, not ranked in Aug 2024–Jul 2025.
73	Madison Worldwide Advertising, LLC Top agencies DOJ (Department of Justice)	$41,089	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
74	Certified Medical Sales, LLC Top agencies VA (Department of Veterans Affairs)	$40,560	0.2%	Rank history: not on the FY2021–FY2022 lists, #33 in FY2023, #72 in FY2024 and #93 in FY2025; new, not ranked in Aug 2024–Jul 2025.
75	Red Orange North America Top agencies DLA (Defense Logistics Agency)	$37,929	0.2%	Rank history: not on the FY2021–FY2024 lists and #84 in FY2025; up 10 since Aug 2024–Jul 2025.
76	Bass - Business Administration Support Specialists LLC Top agencies DOI (Department of the Interior)	$34,118	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
77	Micronesian Divers Association Inc. Top agencies Navy (Department of the Navy)	$34,067	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
78	Bemson Group, LLC Top agencies USAF (Department of the Air Force)	$33,588	0.2%	Rank history: not on the FY2021–FY2024 lists and #90 in FY2025; up 13 since Aug 2024–Jul 2025.
79	Cliffco LLC Top agencies USAF (Department of the Air Force)	$32,392	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
80	Mellor Contracting & Supply, LLC Top agencies USAF (Department of the Air Force)	$31,883	0.2%	Rank history: #71 in FY2021, #68 in FY2022, #84 in FY2023, #92 in FY2024 and not on the FY2025 list; up 62 since Aug 2024–Jul 2025.
81	Siemens Industry Inc. Top agencies DOI (Department of the Interior)	$31,232	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
82	Allied Air Compressor Inc. Top agencies National Gallery of Art	$30,931	0.2%	Rank history: not on the FY2021–FY2025 lists; up 26 since Aug 2024–Jul 2025.
83	Odessa Pumps and Equipment, Inc. Top agencies DOI (Department of the Interior)	$30,789	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
84	Mccombs Electric, Inc. Top agencies USDA (Department of Agriculture)	$30,566	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
85	Fluid-Aire Dynamics Inc. Top agencies Treasury (Department of the Treasury)	$29,496	0.1%	Rank history: not on the FY2021–FY2025 lists; up 31 since Aug 2024–Jul 2025.
86	Diversified Site Services LLC Top agencies VA (Department of Veterans Affairs)	$28,560	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
87	Prosperity Partners CR LLC Top agencies USDA (Department of Agriculture)	$28,450	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
88	Allstate Septic Systems LLP Top agencies DOI (Department of the Interior)	$28,434	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
89	Action Target Inc. Top agencies USAF (Department of the Air Force)	$28,325	0.1%	Rank history: #79 in FY2021, #80 in FY2022, #81 in FY2023, not on the FY2024 list and #92 in FY2025; up 4 since Aug 2024–Jul 2025.
90	Robert Gutierrez Top agencies VA (Department of Veterans Affairs)	$28,182	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
91	R.f. Macdonald Co., LLC Top agencies VA (Department of Veterans Affairs)	$27,916	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
92	Willis Management Enterprises Inc. Top agencies DOI (Department of the Interior)	$27,575	0.1%	Rank history: not on the FY2021–FY2024 lists and #71 in FY2025; down 28 since Aug 2024–Jul 2025.
93	AAA Firepro of New Mexico, Inc. Top agencies USAF (Department of the Air Force)	$27,340	0.1%	Rank history: #61 in FY2021, not on the FY2022 list, #89 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
94	Standard Calibrations Inc. Top agencies Navy (Department of the Navy)	$27,321	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
95	AC Integral Construction LLC Top agencies USDA (Department of Agriculture)	$24,925	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
96	Mckenney'S Management Corporation Through Mckenney's, Inc. Top agencies VA (Department of Veterans Affairs)	$24,800	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
97	Divebase International Inc. Top agencies Navy (Department of the Navy)	$24,312	0.1%	Rank history: not on the FY2021–FY2025 lists; up 39 since Aug 2024–Jul 2025.
98	Rock Well Drilling, LLC Top agencies DOI (Department of the Interior)	$24,052	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
99	J & J Mechanical and Construction Group LLC Top agencies VA (Department of Veterans Affairs)	$23,457	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
100	Diversified Medical Alliance, Inc. Top agencies VA (Department of Veterans Affairs)	$23,100	0.1%	Rank history: not on the FY2021–FY2025 lists; up 30 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 $19.9 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