Top 100 Contractors in PSC 4460: Air Purification Equipment, Aug 2025–Jul 2026

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	The O.c. Lugo Co Inc. Top agencies DLA (Defense Logistics Agency)	$9,691,704	28.4%	Rank history: #2 in FY2021, #8 in FY2022, #2 in FY2023, #2 in FY2024 and #1 in FY2025; up 2 since Aug 2024–Jul 2025.
2	Cepeda Associates, Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$8,683,440	25.4%	Rank history: #3 in FY2021, #1 in FY2022, #1 in FY2023, #1 in FY2024 and #2 in FY2025; unchanged since Aug 2024–Jul 2025.
3	HDT Expeditionary Systems Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army)	$5,851,225	17.1%	Rank history: #5 in FY2021, not on the FY2022–FY2023 lists, #5 in FY2024 and #4 in FY2025; up 3 since Aug 2024–Jul 2025.
4	Vinson Process Controls Company, L.P. Top agencies USAF (Department of the Air Force)	$1,138,212	3.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
5	Phoenix Trading Inc. Top agencies DLA (Defense Logistics Agency)	$926,522	2.7%	Rank history: #17 in FY2021, #23 in FY2022, #6 in FY2023, #6 in FY2024 and #3 in FY2025; down 1 since Aug 2024–Jul 2025.
6	Design West Technologies Inc. Top agencies Navy (Department of the Navy)	$784,500	2.3%	Rank history: #38 in FY2021 and not on the FY2022–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
7	Hi-Tech Air & Water Purification Systems, LLC Top agencies USAF (Department of the Air Force)	$513,700	1.5%	Rank history: #14 in FY2021, not on the FY2022–FY2023 lists, #46 in FY2024 and #13 in FY2025; up 42 since Aug 2024–Jul 2025.
8	Industrial Vacuum Equipment Corporation (Ivec) Top agencies Navy (Department of the Navy) Army (Department of the Army)	$497,810	1.5%	Rank history: not on the FY2021 list, #95 in FY2022, not on the FY2023 list, #30 in FY2024 and #10 in FY2025; up 3 since Aug 2024–Jul 2025.
9	Redlands Manufacturing Co LLC Top agencies DLA (Defense Logistics Agency)	$477,444	1.4%	Rank history: not on the FY2021 list, #54 in FY2022, not on the FY2023 list, #27 in FY2024 and #8 in FY2025; up 10 since Aug 2024–Jul 2025.
10	Tiger-Vac Inc. Top agencies USAF (Department of the Air Force)	$352,463	1.0%	Rank history: not on the FY2021–FY2024 lists and #20 in FY2025; new, not ranked in Aug 2024–Jul 2025.
11	Kampi Components Co Inc. Top agencies DLA (Defense Logistics Agency)	$323,699	0.9%	Rank history: #12 in FY2021, #13 in FY2022, #15 in FY2023, #18 in FY2024 and #43 in FY2025; up 18 since Aug 2024–Jul 2025.
12	Supply King Usa, LLC Top agencies Army (Department of the Army)	$249,995	0.7%	Rank history: not on the FY2021–FY2024 lists and #12 in FY2025; new, not ranked in Aug 2024–Jul 2025.
13	Larkos Packing and Distribution Inc. Top agencies DLA (Defense Logistics Agency)	$248,679	0.7%	Rank history: not on the FY2021–FY2022 lists, #51 in FY2023, not on the FY2024 list and #21 in FY2025; up 27 since Aug 2024–Jul 2025.
14	The Jahnda Group, LLC Top agencies VA (Department of Veterans Affairs)	$219,842	0.6%	Rank history: not on the FY2021–FY2023 lists, #63 in FY2024 and not on the FY2025 list; up 55 since Aug 2024–Jul 2025.
15	Export 220Volt Inc. Top agencies DOS (Department of State)	$213,082	0.6%	Rank history: #8 in FY2021, #4 in FY2022, #7 in FY2023, #3 in FY2024 and #9 in FY2025; down 7 since Aug 2024–Jul 2025.
16	Blast Services Inc. Top agencies USAF (Department of the Air Force)	$158,093	0.5%	Rank history: not on the FY2021–FY2024 lists and #15 in FY2025; new, not ranked in Aug 2024–Jul 2025.
17	Government of the United States Through Federal Prison Industries, Inc. Top agencies DOJ (Department of Justice)	$138,439	0.4%	Rank history: #18 in FY2021, #10 in FY2022, #11 in FY2023, #9 in FY2024 and #6 in FY2025; down 8 since Aug 2024–Jul 2025.
18	UNI Corporation Top agencies Navy (Department of the Navy)	$136,291	0.4%	Rank history: not on the FY2021 list, #9 in FY2022, #75 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
19	Writax Distribution Private Limited Top agencies DOS (Department of State)	$135,000	0.4%	Rank history: not on the FY2021–FY2022 lists, #16 in FY2023, #22 in FY2024 and #17 in FY2025; up 2 since Aug 2024–Jul 2025.
20	Coresivity Inc. Top agencies VA (Department of Veterans Affairs)	$127,594	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
21	Aqua-Chem, Inc. Top agencies DLA (Defense Logistics Agency)	$126,832	0.4%	Rank history: #49 in FY2021, #29 in FY2022, #19 in FY2023, #23 in FY2024 and #56 in FY2025; up 10 since Aug 2024–Jul 2025.
22	F & N Supply LLC Top agencies VA (Department of Veterans Affairs)	$119,394	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
23	Russells Technical Products Inc. Top agencies NASA (National Aeronautics and Space Administration)	$111,070	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
24	Mitsuwa Sangyo KK Top agencies Navy (Department of the Navy)	$106,118	0.3%	Rank history: not on the FY2021–FY2024 lists and #22 in FY2025; up 80 since Aug 2024–Jul 2025.
25	Air Vacuum Corp Top agencies USAF (Department of the Air Force)	$104,730	0.3%	Rank history: not on the FY2021–FY2022 lists, #39 in FY2023, not on the FY2024 list and #26 in FY2025; new, not ranked in Aug 2024–Jul 2025.
26	Jgils, LLC Top agencies DLA (Defense Logistics Agency)	$103,925	0.3%	Rank history: not on the FY2021 list, #89 in FY2022, #83 in FY2023, #61 in FY2024 and #33 in FY2025; up 77 since Aug 2024–Jul 2025.
27	Ketchum & Walton Co Top agencies VA (Department of Veterans Affairs)	$98,721	0.3%	Rank history: not on the FY2021–FY2024 lists and #28 in FY2025; new, not ranked in Aug 2024–Jul 2025.
28	R & M Government Services Inc. Top agencies DLA (Defense Logistics Agency)	$97,621	0.3%	Rank history: #77 in FY2021, not on the FY2022–FY2024 lists and #23 in FY2025; up 34 since Aug 2024–Jul 2025.
29	LBS Enterprises Inc. Top agencies DLA (Defense Logistics Agency)	$88,173	0.3%	Rank history: not on the FY2021–FY2024 lists and #44 in FY2025; new, not ranked in Aug 2024–Jul 2025.
30	Sauer Compressors Usa, Inc. Top agencies Navy (Department of the Navy)	$86,400	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
31	Camfil USA Inc Top agencies DOS (Department of State)	$83,653	0.2%	Rank history: not on the FY2021–FY2023 lists, #60 in FY2024 and #16 in FY2025; down 5 since Aug 2024–Jul 2025.
32	Phoenix Systems Engineering Inc. Top agencies DLA (Defense Logistics Agency)	$82,931	0.2%	Rank history: #16 in FY2021, not on the FY2022 list, #35 in FY2023, #11 in FY2024 and #7 in FY2025; down 22 since Aug 2024–Jul 2025.
33	CU Enterprises Ltd Top agencies DLA (Defense Logistics Agency)	$82,716	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
34	Burhani Enterprises Inc. Top agencies Army (Department of the Army)	$79,560	0.2%	Rank history: #87 in FY2021, not on the FY2022–FY2023 lists, #39 in FY2024 and #34 in FY2025; up 3 since Aug 2024–Jul 2025.
35	Sledge TECH LLC Top agencies USDA (Department of Agriculture)	$72,201	0.2%	Rank history: not on the FY2021–FY2024 lists and #38 in FY2025; new, not ranked in Aug 2024–Jul 2025.
36	Fluid Conditioning Products, Inc. Top agencies DLA (Defense Logistics Agency)	$69,101	0.2%	Rank history: not on the FY2021 list, #76 in FY2022, not on the FY2023 list, #50 in FY2024 and not on the FY2025 list; up 55 since Aug 2024–Jul 2025.
37	Airborne Supply Inc. Top agencies DLA (Defense Logistics Agency)	$65,400	0.2%	Rank history: not on the FY2021–FY2024 lists and #41 in FY2025; new, not ranked in Aug 2024–Jul 2025.
38	Fed Logistics Top agencies Navy (Department of the Navy)	$64,996	0.2%	Rank history: not on the FY2021–FY2024 lists and #42 in FY2025; new, not ranked in Aug 2024–Jul 2025.
39	Gnap LLC Top agencies DHS (Department of Homeland Security)	$64,727	0.2%	Rank history: not on the FY2021–FY2022 lists, #57 in FY2023, #83 in FY2024 and #40 in FY2025; up 2 since Aug 2024–Jul 2025.
40	Suncore Distribution LLC Top agencies Army (Department of the Army)	$60,765	0.2%	Rank history: not on the FY2021–FY2024 lists and #47 in FY2025; new, not ranked in Aug 2024–Jul 2025.
41	J.h. Norton Company, Inc. Top agencies DHS (Department of Homeland Security) Navy (Department of the Navy)	$55,469	0.2%	Rank history: #39 in FY2021 and not on the FY2022–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
42	Leonardo S.p.A. Through Engineered Coil Company Top agencies DLA (Defense Logistics Agency)	$54,600	0.2%	Rank history: not on the FY2021–FY2022 lists, #61 in FY2023, #53 in FY2024 and #30 in FY2025; down 10 since Aug 2024–Jul 2025.
43	AOS Services Inc. Top agencies USAF (Department of the Air Force)	$53,550	0.2%	Rank history: not on the FY2021–FY2024 lists and #52 in FY2025; new, not ranked in Aug 2024–Jul 2025.
44	Triman Industries Inc. Top agencies DLA (Defense Logistics Agency)	$51,365	0.2%	Rank history: not on the FY2021–FY2022 lists, #45 in FY2023, #38 in FY2024 and #63 in FY2025; up 17 since Aug 2024–Jul 2025.
45	Air Cleaning Technologies, Inc. 2 awardees Top agencies USAF (Department of the Air Force) SSA (Social Security Administration)	$50,691	0.1%	Rank history: #26 in FY2021, not on the FY2022–FY2024 lists and #65 in FY2025; up 34 since Aug 2024–Jul 2025.
46	Magnum Precision Machines Inc. Top agencies USAF (Department of the Air Force)	$48,899	0.1%	Rank history: not on the FY2021–FY2024 lists and #54 in FY2025; new, not ranked in Aug 2024–Jul 2025.
47	Dela Technology Corporation Top agencies DLA (Defense Logistics Agency)	$48,440	0.1%	Rank history: not on the FY2021–FY2024 lists and #53 in FY2025; up 5 since Aug 2024–Jul 2025.
48	Sylvane, Inc. Top agencies DOS (Department of State)	$48,000	0.1%	Rank history: not on the FY2021 list, #97 in FY2022, not on the FY2023–FY2024 lists and #72 in FY2025; up 79 since Aug 2024–Jul 2025.
49	Spaires Inc. Top agencies DLA (Defense Logistics Agency)	$47,279	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
50	JNV Group Top agencies Navy (Department of the Navy)	$45,824	0.1%	Rank history: #58 in FY2021, not on the FY2022 list, #49 in FY2023, #20 in FY2024 and #31 in FY2025; down 17 since Aug 2024–Jul 2025.
51	Golden Relief Resources Ltd Top agencies USSOCOM (United States Special Operations Command)	$42,610	0.1%	Rank history: not on the FY2021–FY2024 lists and #60 in FY2025; new, not ranked in Aug 2024–Jul 2025.
52	The Boelter Companies Inc Through Citisco, LLC Top agencies SSA (Social Security Administration)	$39,244	0.1%	Rank history: not on the FY2021–FY2024 lists and #62 in FY2025; new, not ranked in Aug 2024–Jul 2025.
53	Red Orange North America Top agencies DOS (Department of State)	$36,250	0.1%	Rank history: not on the FY2021–FY2024 lists and #64 in FY2025; new, not ranked in Aug 2024–Jul 2025.
54	S I T Corporation Top agencies DLA (Defense Logistics Agency)	$32,459	0.1%	Rank history: #89 in FY2021, not on the FY2022–FY2023 lists, #90 in FY2024 and not on the FY2025 list; up 59 since Aug 2024–Jul 2025.
55	K.r. Campbell, Inc. Top agencies Navy (Department of the Navy)	$32,020	0.1%	Rank history: not on the FY2021–FY2023 lists, #69 in FY2024 and #50 in FY2025; unchanged since Aug 2024–Jul 2025.
56	Nasco Aerospace and Electronics LLC Top agencies Navy (Department of the Navy)	$29,855	0.1%	Rank history: not on the FY2021 list, #66 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
57	Merlin L.l.c-Fz Top agencies DOS (Department of State)	$28,500	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
58	Sterileco LLC Top agencies USAF (Department of the Air Force)	$28,500	0.1%	Rank history: not on the FY2021–FY2024 lists and #89 in FY2025; new, not ranked in Aug 2024–Jul 2025.
59	Honeywell International Inc. Top agencies DLA (Defense Logistics Agency)	$27,062	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
60	JTM Enterprises LLC Top agencies HHS (Department of Health and Human Services)	$27,033	0.1%	Rank history: #11 in FY2021, #78 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
61	Greenheck Fan Corporation Top agencies DOS (Department of State)	$26,273	0.1%	Rank history: not on the FY2021–FY2024 lists and #70 in FY2025; new, not ranked in Aug 2024–Jul 2025.
62	UV Partners, Inc. Top agencies USAF (Department of the Air Force)	$24,161	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
63	Berkley Environmental Services, LLC Top agencies VA (Department of Veterans Affairs)	$22,994	0.1%	Rank history: not on the FY2021–FY2024 lists and #80 in FY2025; new, not ranked in Aug 2024–Jul 2025.
64	Windward Enterprises, LLC Top agencies DLA (Defense Logistics Agency)	$22,110	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
65	Jamaica Bearings Co., Inc. Top agencies DLA (Defense Logistics Agency)	$21,402	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
66	Lockheed Martin Corporation Top agencies DLA (Defense Logistics Agency)	$20,558	0.1%	Rank history: not on the FY2021–FY2022 lists, #42 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
67	Commercial Filter Sales and Service, Inc. Top agencies USAF (Department of the Air Force)	$20,515	0.1%	Rank history: not on the FY2021–FY2024 lists and #76 in FY2025; new, not ranked in Aug 2024–Jul 2025.
68	Caprice Electronics, Inc. Top agencies VA (Department of Veterans Affairs)	$20,273	0.1%	Rank history: not on the FY2021–FY2022 lists, #28 in FY2023, not on the FY2024 list and #66 in FY2025; up 20 since Aug 2024–Jul 2025.
69	Government Scientific Source Inc. Top agencies VA (Department of Veterans Affairs)	$20,051	0.1%	Rank history: not on the FY2021–FY2022 lists, #65 in FY2023, #76 in FY2024 and not on the FY2025 list; up 15 since Aug 2024–Jul 2025.
70	Jenks Inc. Top agencies HHS (Department of Health and Human Services) Navy (Department of the Navy)	$18,890	0.1%	Rank history: not on the FY2021–FY2024 lists and #81 in FY2025; new, not ranked in Aug 2024–Jul 2025.
71	Martin Military Inc. Top agencies DLA (Defense Logistics Agency)	$18,746	0.1%	Rank history: not on the FY2021–FY2022 lists, #81 in FY2023, #29 in FY2024 and not on the FY2025 list; down 14 since Aug 2024–Jul 2025.
72	Westsim Engineering, Inc. Top agencies DLA (Defense Logistics Agency)	$17,811	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
73	The Office Group Inc. Top agencies Treasury (Department of the Treasury)	$15,912	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
74	Wonder State Solutions LLC Top agencies VA (Department of Veterans Affairs)	$15,880	<0.1%	Rank history: not on the FY2021–FY2022 lists, #50 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
75	The Reinhart Corporation Top agencies Navy (Department of the Navy)	$14,784	<0.1%	Rank history: not on the FY2021–FY2024 lists and #90 in FY2025; new, not ranked in Aug 2024–Jul 2025.
76	WKF (Friedman) Enterprises, Inc. Top agencies DLA (Defense Logistics Agency)	$14,155	<0.1%	Rank history: not on the FY2021–FY2024 lists and #92 in FY2025; new, not ranked in Aug 2024–Jul 2025.
77	Juniper Elbow Co. Inc. Top agencies DLA (Defense Logistics Agency)	$13,310	<0.1%	Rank history: not on the FY2021–FY2024 lists and #73 in FY2025; down 6 since Aug 2024–Jul 2025.
78	Metro Reliable Resources Corp. Top agencies DLA (Defense Logistics Agency)	$12,663	<0.1%	Rank history: not on the FY2021–FY2025 lists; up 28 since Aug 2024–Jul 2025.
79	Mil Serve International Dmcc Top agencies DOS (Department of State)	$12,650	<0.1%	Rank history: not on the FY2021–FY2024 lists and #96 in FY2025; new, not ranked in Aug 2024–Jul 2025.
80	Verasu Retail Co Ltd Top agencies DOS (Department of State)	$12,575	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
81	Truebell Marketing & Trading. Llc. Top agencies DOS (Department of State)	$12,452	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
82	Southeastern Engineering Sales, Inc. Top agencies Navy (Department of the Navy)	$12,090	<0.1%	Rank history: not on the FY2021–FY2022 lists, #100 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
83	B & H International LLC Top agencies Navy (Department of the Navy)	$11,330	<0.1%	Rank history: #51 in FY2021, #31 in FY2022, not on the FY2023 list, #14 in FY2024 and #29 in FY2025; down 48 since Aug 2024–Jul 2025.
84	Mark C. Pope Associates, Inc. Top agencies DLA (Defense Logistics Agency)	$11,025	<0.1%	Rank history: not on the FY2021–FY2025 lists; up 17 since Aug 2024–Jul 2025.
85	Kinetic Solutions Inc.	$9,000	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
86	NDS Sales, LLC Top agencies USAF (Department of the Air Force)	$8,991	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
87	Biotech Fluidics, LLC Top agencies DLA (Defense Logistics Agency)	$8,667	<0.1%	Rank history: not on the FY2021–FY2022 lists, #76 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
88	Spectrum Manufacturing & Sales, Inc. Top agencies DLA (Defense Logistics Agency)	$7,953	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
89	HD Ripple LLC Top agencies DLA (Defense Logistics Agency)	$6,734	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
90	Protronic LLC Top agencies DLA (Defense Logistics Agency)	$6,484	<0.1%	Rank history: not on the FY2021–FY2023 lists, #92 in FY2024 and not on the FY2025 list; new, not ranked in Aug 2024–Jul 2025.
91	Smith Eastern Corp Top agencies DLA (Defense Logistics Agency)	$4,706	<0.1%	Rank history: #36 in FY2021, #41 in FY2022, #47 in FY2023, not on the FY2024 list and #19 in FY2025; down 67 since Aug 2024–Jul 2025.
92	Cyber Go LLC Top agencies DLA (Defense Logistics Agency)	$4,410	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
93	Direct Line, Inc. Top agencies DLA (Defense Logistics Agency)	$4,370	<0.1%	Rank history: not on the FY2021 list, #25 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
94	W.w. Grainger, Inc. Top agencies DOS (Department of State)	$3,230	<0.1%	Rank history: #21 in FY2021, not on the FY2022–FY2024 lists and #27 in FY2025; down 64 since Aug 2024–Jul 2025.
95	ECI Defense Group, Inc. Top agencies DLA (Defense Logistics Agency)	$2,525	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
96	Aurora Supply, Llc. Top agencies DLA (Defense Logistics Agency)	$1,954	<0.1%	Rank history: not on the FY2021–FY2025 lists; up 28 since Aug 2024–Jul 2025.
97	Copa GSE LLC Top agencies DLA (Defense Logistics Agency)	$1,557	<0.1%	Rank history: not on the FY2021–FY2024 lists and #83 in FY2025; down 17 since Aug 2024–Jul 2025.
98	Barnhart-Davis Company Top agencies DLA (Defense Logistics Agency)	$1,287	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
99	Nationwide Supplies, L.P. Top agencies DOS (Department of State)	$1,006	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
100	Divine Dynamics Solution LLC Top agencies DLA (Defense Logistics Agency)	$956	<0.1%	Rank history: not on the FY2021–FY2025 lists; up 23 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 $34.1 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