Top 100 Contractors in NAICS 541712: Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology), Aug 2025–Jul 2026

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Massachusetts Institute of Technology 2 awardees Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$1,403,199,544	15.0%	Rank history: #1 in FY2021, #1 in FY2022, #1 in FY2023, #1 in FY2024 and not on the FY2025 list; unchanged since Aug 2024–Jul 2025.
2	Brookhaven Science Associates LLC Top agencies DOE (Department of Energy)	$932,845,629	10.0%	Rank history: #5 in FY2021, #2 in FY2022, #3 in FY2023, #2 in FY2024 and #2 in FY2025; unchanged since Aug 2024–Jul 2025.
3	Torch Technologies Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$539,875,338	5.8%	Rank history: #15 in FY2021, #6 in FY2022, #4 in FY2023, #4 in FY2024 and #3 in FY2025; up 1 since Aug 2024–Jul 2025.
4	Odyssey Systems Consulting Group, Ltd. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$464,360,714	5.0%	Rank history: #38 in FY2021, #33 in FY2022, #11 in FY2023, #5 in FY2024 and #6 in FY2025; up 1 since Aug 2024–Jul 2025.
5	Amentum Holdings, Inc. 4 awardees, including Amentum Technology, Inc., Amentum Services, Inc. and The Keyw Corporation Top agencies MDA (DOD Missile Defense Agency) Navy (Department of the Navy) USAF (Department of the Air Force)	$441,486,062	4.7%	Rank history: not on the FY2021–FY2024 lists and #5 in FY2025; up 3 since Aug 2024–Jul 2025.
6	Science Applications International Corporation Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$358,910,316	3.8%	Rank history: #2 in FY2021, #3 in FY2022, #2 in FY2023, #3 in FY2024 and #4 in FY2025; down 3 since Aug 2024–Jul 2025.
7	L3Harris Technologies, Inc. 13 awardees, including Aerojet Rocketdyne of DE, Inc. and Aerojet Rocketdyne, Inc. Top agencies NASA (National Aeronautics and Space Administration)	$339,588,206	3.6%	Rank history: #48 in FY2021, #78 in FY2022, #96 in FY2023, #6 in FY2024 and #9 in FY2025; unchanged since Aug 2024–Jul 2025.
8	Arctic Slope Regional Corporation 5 awardees, including Applied Research Solutions, Inc., Asrc Federal System Solutions LLC and Data Networks, Inc. Top agencies USAF (Department of the Air Force) Commerce (Department of Commerce) USCYBERCOM (Department of Defense Cyber Command)	$315,460,884	3.4%	Rank history: #25 in FY2021, #21 in FY2022, #34 in FY2023, #31 in FY2024 and #7 in FY2025; up 21 since Aug 2024–Jul 2025.
9	Northrop Grumman Systems Corporation 10 awardees Top agencies NASA (National Aeronautics and Space Administration)	$305,234,495	3.3%	Rank history: #13 in FY2021, #8 in FY2022, #10 in FY2023, #16 in FY2024 and #8 in FY2025; down 3 since Aug 2024–Jul 2025.
10	Modern Technology Solutions, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$265,651,054	2.8%	Rank history: #45 in FY2021, #29 in FY2022, #22 in FY2023, #19 in FY2024 and #11 in FY2025; unchanged since Aug 2024–Jul 2025.
11	Mag DS Corp Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$246,564,731	2.6%	Rank history: #23 in FY2021, #13 in FY2022, #14 in FY2023, #51 in FY2024 and #14 in FY2025; new, not ranked in Aug 2024–Jul 2025.
12	Astrion Group, LLC 2 awardees, including Oasis Systems, LLC and Axient LLC Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration)	$213,532,057	2.3%	Rank history: #35 in FY2021, #31 in FY2022, #32 in FY2023, #54 in FY2024 and #10 in FY2025; new, not ranked in Aug 2024–Jul 2025.
13	General Dynamics Corporation 11 awardees, including General Dynamics Global Force, LLC, General Dynamics Information Technology, Inc. and Dynport Vaccine Company LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) DHA (Defense Health Agency)	$211,757,403	2.3%	Rank history: #19 in FY2021, #14 in FY2022, #13 in FY2023, #42 in FY2024 and #17 in FY2025; up 11 since Aug 2024–Jul 2025.
14	Booz Allen Hamilton Holding Corporation Through Booz Allen Hamilton Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) USSOCOM (United States Special Operations Command)	$201,841,939	2.2%	Rank history: #12 in FY2021, #12 in FY2022, #8 in FY2023, #7 in FY2024 and #13 in FY2025; down 2 since Aug 2024–Jul 2025.
15	Tecolote Research, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DHS (Department of Homeland Security)	$179,858,438	1.9%	Rank history: #27 in FY2021, #24 in FY2022, #18 in FY2023, #13 in FY2024 and #15 in FY2025; down 1 since Aug 2024–Jul 2025.
16	RTX Corporation 18 awardees, including Raytheon Company and Hamilton Sundstrand Space Systems International, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) NASA (National Aeronautics and Space Administration)	$158,575,329	1.7%	Rank history: #3 in FY2021, #9 in FY2022, #7 in FY2023, #28 in FY2024 and #16 in FY2025; unchanged since Aug 2024–Jul 2025.
17	QED Systems LLC Top agencies Army (Department of the Army)	$153,292,235	1.6%	Rank history: #55 in FY2021, #45 in FY2022, #29 in FY2023, #29 in FY2024 and #18 in FY2025; up 5 since Aug 2024–Jul 2025.
18	Systems Planning and Analysis, Inc. 3 awardees, including Intrepid LLC, MCR Federal, LLC and Group W Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) OSD (Office of the Secretary of Defense)	$129,885,278	1.4%	Rank history: not on the FY2021–FY2024 lists and #12 in FY2025; new, not ranked in Aug 2024–Jul 2025.
19	P E Systems, Inc. Top agencies USAF (Department of the Air Force)	$126,418,887	1.4%	Rank history: #44 in FY2021, #54 in FY2022, #35 in FY2023, #32 in FY2024 and #22 in FY2025; up 12 since Aug 2024–Jul 2025.
20	Serco Inc 2 awardees Top agencies Army (Department of the Army) Navy (Department of the Navy)	$110,508,044	1.2%	Rank history: not on the FY2021–FY2022 lists, #91 in FY2023, #64 in FY2024 and #28 in FY2025; up 61 since Aug 2024–Jul 2025.
21	Sigmatech Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$99,387,206	1.1%	Rank history: #46 in FY2021, #43 in FY2022, #36 in FY2023, #22 in FY2024 and #23 in FY2025; up 7 since Aug 2024–Jul 2025.
22	University of Texas System 4 awardees, including University of Texas At Austin Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$98,005,334	1.0%	Rank history: #33 in FY2021, #28 in FY2022, #26 in FY2023, #33 in FY2024 and #21 in FY2025; new, not ranked in Aug 2024–Jul 2025.
23	Sev1Tech, LLC Top agencies Army (Department of the Army)	$96,132,483	1.0%	Rank history: #34 in FY2021, #34 in FY2022, #28 in FY2023, #35 in FY2024 and #24 in FY2025; down 2 since Aug 2024–Jul 2025.
24	Applied Research Associates, Inc. Top agencies DTRA (Defense Threat Reduction Agency) USAF (Department of the Air Force) DHS (Department of Homeland Security)	$87,454,847	0.9%	Rank history: #22 in FY2021, #18 in FY2022, #17 in FY2023, #14 in FY2024 and #20 in FY2025; down 5 since Aug 2024–Jul 2025.
25	KBR Wyle Services LLC 2 awardees Top agencies NASA (National Aeronautics and Space Administration)	$82,325,810	0.9%	Rank history: not on the FY2021–FY2023 lists, #24 in FY2024 and #19 in FY2025; down 8 since Aug 2024–Jul 2025.
26	Leidos Holdings, Inc. 6 awardees, including Leidos, Inc. and Aranea Solutions Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DTRA (Defense Threat Reduction Agency)	$76,651,606	0.8%	Rank history: #7 in FY2021, #10 in FY2022, #12 in FY2023, #17 in FY2024 and #26 in FY2025; unchanged since Aug 2024–Jul 2025.
27	Carnegie-Mellon University 2 awardees Top agencies USAF (Department of the Air Force)	$73,023,472	0.8%	Rank history: #28 in FY2021, #26 in FY2022, #24 in FY2023, #15 in FY2024 and #25 in FY2025; new, not ranked in Aug 2024–Jul 2025.
28	Teledyne Flir Unmanned Ground Systems Inc 2 awardees, including Teledyne Brown Engineering, Inc. Top agencies Army (Department of the Army) NASA (National Aeronautics and Space Administration)	$69,174,591	0.7%	Rank history: #36 in FY2021, #41 in FY2022, #44 in FY2023, #39 in FY2024 and #33 in FY2025; up 10 since Aug 2024–Jul 2025.
29	Colsa Corp Top agencies USAF (Department of the Air Force)	$58,921,128	0.6%	Rank history: #16 in FY2021, #27 in FY2022, #30 in FY2023, #27 in FY2024 and #29 in FY2025; up 11 since Aug 2024–Jul 2025.
30	IAP World Services, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$57,173,001	0.6%	Rank history: not on the FY2021–FY2024 lists and #36 in FY2025; up 29 since Aug 2024–Jul 2025.
31	University of Texas At Austin Top agencies Navy (Department of the Navy) Army (Department of the Army) OSD (Office of the Secretary of Defense)	$56,752,090	0.6%	Rank history: not on the FY2021–FY2023 lists, #37 in FY2024 and not on the FY2025 list; down 11 since Aug 2024–Jul 2025.
32	Data Systems Analysts Inc. 2 awardees Top agencies Army (Department of the Army) Navy (Department of the Navy)	$47,910,432	0.5%	Rank history: not on the FY2021–FY2022 lists, #51 in FY2023, #49 in FY2024 and #38 in FY2025; up 11 since Aug 2024–Jul 2025.
33	Intuitive Research and Technology Corporation Top agencies Army (Department of the Army)	$45,182,363	0.5%	Rank history: not on the FY2021–FY2025 lists; up 8 since Aug 2024–Jul 2025.
34	Universal Technical Resource Services Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$42,249,743	0.5%	Rank history: not on the FY2021 list, #76 in FY2022, #49 in FY2023, #45 in FY2024 and #42 in FY2025; up 5 since Aug 2024–Jul 2025.
35	The Charles Stark Draper Laboratory, Inc. Top agencies MDA (DOD Missile Defense Agency)	$41,420,912	0.4%	Rank history: not on the FY2021–FY2024 lists and #40 in FY2025; new, not ranked in Aug 2024–Jul 2025.
36	Sumaria Systems, LLC Top agencies USAF (Department of the Air Force)	$39,327,099	0.4%	Rank history: #53 in FY2021, #42 in FY2022, #37 in FY2023, #34 in FY2024 and #32 in FY2025; down 1 since Aug 2024–Jul 2025.
37	SMS Data Products Group Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$37,639,558	0.4%	Rank history: #67 in FY2021, #56 in FY2022, #45 in FY2023, #46 in FY2024 and #31 in FY2025; down 1 since Aug 2024–Jul 2025.
38	Battelle Memorial Institute 2 awardees Top agencies USAF (Department of the Air Force) Army (Department of the Army) HHS (Department of Health and Human Services)	$30,361,477	0.3%	Rank history: #29 in FY2021, #44 in FY2022, #41 in FY2023, #52 in FY2024 and #39 in FY2025; up 6 since Aug 2024–Jul 2025.
39	Radiance Technologies, Inc. 2 awardees Top agencies Army (Department of the Army)	$25,309,544	0.3%	Rank history: #20 in FY2021, #19 in FY2022, #20 in FY2023, #23 in FY2024 and #34 in FY2025; down 5 since Aug 2024–Jul 2025.
40	DCS Corporation Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$24,682,912	0.3%	Rank history: #32 in FY2021, #36 in FY2022, #25 in FY2023, #25 in FY2024 and #30 in FY2025; down 8 since Aug 2024–Jul 2025.
41	Cis Secure Computing, Inc. Through Intrepid Solutions and Services, LLC Top agencies Army (Department of the Army)	$21,217,334	0.2%	Rank history: not on the FY2021–FY2024 lists and #47 in FY2025; new, not ranked in Aug 2024–Jul 2025.
42	Global Science & Technology, LLC Top agencies Commerce (Department of Commerce)	$20,773,549	0.2%	Rank history: not on the FY2021 list, #69 in FY2022, #57 in FY2023, #67 in FY2024 and #64 in FY2025; up 16 since Aug 2024–Jul 2025.
43	Quantech Services Inc. Top agencies USAF (Department of the Air Force)	$20,645,482	0.2%	Rank history: #94 in FY2021, #75 in FY2022, #64 in FY2023, #61 in FY2024 and #45 in FY2025; up 5 since Aug 2024–Jul 2025.
44	Abacus Technology Corporation Top agencies USAF (Department of the Air Force)	$19,566,102	0.2%	Rank history: not on the FY2021–FY2023 lists, #98 in FY2024 and #51 in FY2025; up 17 since Aug 2024–Jul 2025.
45	Precise Systems, Inc. Through Excet, LLC Top agencies Army (Department of the Army)	$18,945,264	0.2%	Rank history: not on the FY2021–FY2024 lists and #49 in FY2025; new, not ranked in Aug 2024–Jul 2025.
46	Anavation, LLC Top agencies Army (Department of the Army)	$18,250,138	0.2%	Rank history: #97 in FY2021, not on the FY2022 list, #63 in FY2023, #62 in FY2024 and #60 in FY2025; up 20 since Aug 2024–Jul 2025.
47	Sierra Lobo Inc. Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force)	$17,942,743	0.2%	Rank history: not on the FY2021–FY2024 lists and #50 in FY2025; up 16 since Aug 2024–Jul 2025.
48	Analex Corporation Top agencies Navy (Department of the Navy)	$16,344,282	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
49	Systems Products and Solutions, Inc. Top agencies Army (Department of the Army)	$14,315,844	0.2%	Rank history: not on the FY2021–FY2022 lists, #87 in FY2023, #92 in FY2024 and #58 in FY2025; up 36 since Aug 2024–Jul 2025.
50	Strategic Analysis, Inc. Top agencies OSD (Office of the Secretary of Defense)	$13,591,853	0.1%	Rank history: not on the FY2021–FY2022 lists, #82 in FY2023, #60 in FY2024 and #48 in FY2025; down 3 since Aug 2024–Jul 2025.
51	Adams Communication & Engineering Technology, Inc. Top agencies Navy (Department of the Navy)	$13,272,933	0.1%	Rank history: #72 in FY2021, #80 in FY2022, #100 in FY2023, #50 in FY2024 and #44 in FY2025; down 2 since Aug 2024–Jul 2025.
52	ManTech International Corporation Through Mantech Advanced Systems International, Inc. Top agencies Army (Department of the Army)	$12,702,864	0.1%	Rank history: not on the FY2021–FY2025 lists; up 54 since Aug 2024–Jul 2025.
53	Bluehalo LLC Top agencies Army (Department of the Army)	$11,537,902	0.1%	Rank history: not on the FY2021–FY2025 lists; up 84 since Aug 2024–Jul 2025.
54	Science Systems and Applications, Inc. Top agencies NASA (National Aeronautics and Space Administration)	$11,532,711	0.1%	Rank history: #84 in FY2021, #63 in FY2022, #48 in FY2023, #53 in FY2024 and #43 in FY2025; down 12 since Aug 2024–Jul 2025.
55	Astrix Technology LLC Top agencies HHS (Department of Health and Human Services) USDA (Department of Agriculture)	$10,256,652	0.1%	Rank history: not on the FY2021–FY2023 lists, #66 in FY2024 and #52 in FY2025; up 2 since Aug 2024–Jul 2025.
56	Thompson Gray, Inc. Top agencies Army (Department of the Army)	$9,433,758	0.1%	Rank history: not on the FY2021–FY2023 lists, #79 in FY2024 and #66 in FY2025; up 19 since Aug 2024–Jul 2025.
57	Kbr, Inc. 5 awardees, including KBR Wyle Services, LLC Top agencies NASA (National Aeronautics and Space Administration)	$8,704,037	0.1%	Rank history: #11 in FY2021, #16 in FY2022, #19 in FY2023, #38 in FY2024 and not on the FY2025 list; new, not ranked in Aug 2024–Jul 2025.
58	DLH Holdings Corp Through Social & Scientific Systems, Inc. Top agencies HHS (Department of Health and Human Services)	$7,817,435	0.1%	Rank history: not on the FY2021 list, #90 in FY2022, #76 in FY2023, #77 in FY2024 and #55 in FY2025; down 3 since Aug 2024–Jul 2025.
59	The Survice Engineering Company LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) DFAS (Defense Finance and Accounting Service)	$7,717,272	0.1%	Rank history: not on the FY2021–FY2022 lists, #97 in FY2023, #75 in FY2024 and #61 in FY2025; up 3 since Aug 2024–Jul 2025.
60	Earth Resources Technology, LLC Top agencies Commerce (Department of Commerce)	$7,514,206	0.1%	Rank history: not on the FY2021 list, #92 in FY2022, #81 in FY2023, #74 in FY2024 and #57 in FY2025; unchanged since Aug 2024–Jul 2025.
61	Premier Technology, Inc. Top agencies DTRA (Defense Threat Reduction Agency)	$7,468,891	0.1%	Rank history: not on the FY2021–FY2023 lists, #86 in FY2024 and #63 in FY2025; up 13 since Aug 2024–Jul 2025.
62	Research Triangle Institute Top agencies HHS (Department of Health and Human Services)	$7,200,000	0.1%	Rank history: not on the FY2021–FY2024 lists and #85 in FY2025; up 47 since Aug 2024–Jul 2025.
63	Aegis Aerospace Inc. Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration)	$7,099,906	0.1%	Rank history: not on the FY2021–FY2022 lists, #90 in FY2023, #84 in FY2024 and #69 in FY2025; up 9 since Aug 2024–Jul 2025.
64	The Regents of the University of Colorado Top agencies NASA (National Aeronautics and Space Administration)	$6,984,430	0.1%	Rank history: not on the FY2021–FY2023 lists, #87 in FY2024 and #67 in FY2025; up 4 since Aug 2024–Jul 2025.
65	EPS Corporation Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$6,812,577	0.1%	Rank history: not on the FY2021 list, #72 in FY2022, not on the FY2023 list, #57 in FY2024 and #46 in FY2025; down 19 since Aug 2024–Jul 2025.
66	Gauss Management Research and Engineering Inc. Top agencies USAF (Department of the Air Force)	$6,784,865	0.1%	Rank history: not on the FY2021 list, #87 in FY2022, #70 in FY2023, #73 in FY2024 and #82 in FY2025; up 22 since Aug 2024–Jul 2025.
67	Cepeda Systems & Software Analysis, Inc. Top agencies NASA (National Aeronautics and Space Administration)	$6,735,603	0.1%	Rank history: not on the FY2021–FY2024 lists and #75 in FY2025; up 13 since Aug 2024–Jul 2025.
68	Ideal Innovations Incorporated Top agencies Army (Department of the Army)	$6,516,532	0.1%	Rank history: not on the FY2021–FY2023 lists, #99 in FY2024 and #83 in FY2025; up 27 since Aug 2024–Jul 2025.
69	Tec-Masters, Inc. Top agencies Army (Department of the Army)	$6,272,566	0.1%	Rank history: not on the FY2021–FY2023 lists, #96 in FY2024 and #73 in FY2025; up 13 since Aug 2024–Jul 2025.
70	Arizona Board of Regents 2 awardees, including Arizona State University and University of Arizona Top agencies NASA (National Aeronautics and Space Administration)	$5,519,327	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
71	Btas Inc. Top agencies USAF (Department of the Air Force)	$5,230,546	0.1%	Rank history: not on the FY2021–FY2024 lists and #77 in FY2025; up 15 since Aug 2024–Jul 2025.
72	Qinetiq Inc. Top agencies Army (Department of the Army)	$5,193,169	0.1%	Rank history: not on the FY2021–FY2024 lists and #74 in FY2025; down 1 since Aug 2024–Jul 2025.
73	Altus, LLC Top agencies Army (Department of the Army)	$4,395,191	<0.1%	Rank history: not on the FY2021–FY2024 lists and #89 in FY2025; up 23 since Aug 2024–Jul 2025.
74	Usfalcon Inc. Top agencies Army (Department of the Army)	$4,247,444	<0.1%	Rank history: not on the FY2021–FY2024 lists and #93 in FY2025; up 31 since Aug 2024–Jul 2025.
75	QWK Integrated Solutions LLC Top agencies Army (Department of the Army)	$4,121,457	<0.1%	Rank history: not on the FY2021–FY2024 lists and #91 in FY2025; up 29 since Aug 2024–Jul 2025.
76	MRIGLOBAL Top agencies HHS (Department of Health and Human Services)	$4,100,000	<0.1%	Rank history: not on the FY2021–FY2024 lists and #94 in FY2025; up 43 since Aug 2024–Jul 2025.
77	Micro Systems Consultants Inc. Top agencies DOT (Department of Transportation)	$4,096,808	<0.1%	Rank history: not on the FY2021–FY2024 lists and #90 in FY2025; up 22 since Aug 2024–Jul 2025.
78	Parsons Corporation 3 awardees, including Parsons Government Services Inc. and Polaris Alpha Advanced Systems Inc. Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency)	$4,011,933	<0.1%	Rank history: #10 in FY2021, #15 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
79	Spectrum Software Technology Inc Top agencies DOT (Department of Transportation)	$3,825,060	<0.1%	Rank history: not on the FY2021–FY2023 lists, #97 in FY2024 and #72 in FY2025; down 1 since Aug 2024–Jul 2025.
80	Government of the United States Through Smithsonian Institution Top agencies NASA (National Aeronautics and Space Administration)	$3,570,152	<0.1%	Rank history: not on the FY2021–FY2024 lists and #78 in FY2025; new, not ranked in Aug 2024–Jul 2025.
81	University of Arizona Top agencies NASA (National Aeronautics and Space Administration)	$3,502,445	<0.1%	Rank history: not on the FY2021–FY2024 lists and #70 in FY2025; down 8 since Aug 2024–Jul 2025.
82	CDO Technologies Inc. Top agencies USAF (Department of the Air Force)	$3,379,452	<0.1%	Rank history: not on the FY2021–FY2024 lists and #92 in FY2025; up 26 since Aug 2024–Jul 2025.
83	BAE Systems PLC 6 awardees, including BAE Systems Space & Mission Systems Inc. Top agencies NASA (National Aeronautics and Space Administration)	$2,939,897	<0.1%	Rank history: #89 in FY2021, not on the FY2022–FY2024 lists and #99 in FY2025; new, not ranked in Aug 2024–Jul 2025.
84	Peraton Aerospace & Defense Inc. 2 awardees, including Analex Corporation Top agencies Navy (Department of the Navy)	$2,347,323	<0.1%	Rank history: not on the FY2021 list, #91 in FY2022, #55 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
85	Envisioneering Inc. Top agencies Navy (Department of the Navy)	$2,337,765	<0.1%	Rank history: not on the FY2021–FY2023 lists, #85 in FY2024 and #79 in FY2025; down 15 since Aug 2024–Jul 2025.
86	Cruz Associates Inc. Top agencies Army (Department of the Army)	$2,330,412	<0.1%	Rank history: not on the FY2021–FY2025 lists; up 44 since Aug 2024–Jul 2025.
87	Lockheed Martin Corporation Top agencies NASA (National Aeronautics and Space Administration)	$2,236,352	<0.1%	Rank history: not on the FY2021–FY2025 lists; up 7 since Aug 2024–Jul 2025.
88	Arizona State University Top agencies NASA (National Aeronautics and Space Administration)	$2,225,661	<0.1%	Rank history: not on the FY2021–FY2025 lists; down 4 since Aug 2024–Jul 2025.
89	University System of Maryland 2 awardees, including University of Maryland, College Park Top agencies NASA (National Aeronautics and Space Administration)	$2,085,622	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
90	Analytic Services Inc. 2 awardees, including Advanced Technology International Top agencies Navy (Department of the Navy)	$2,054,842	<0.1%	Rank history: not on the FY2021 list, #89 in FY2022, #75 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
91	Southwest Research Institute Top agencies NASA (National Aeronautics and Space Administration)	$2,015,455	<0.1%	Rank history: not on the FY2021–FY2025 lists; up 42 since Aug 2024–Jul 2025.
92	HX5 LLC Top agencies USAF (Department of the Air Force)	$1,942,000	<0.1%	Rank history: #30 in FY2021, #30 in FY2022, #43 in FY2023, #30 in FY2024 and #37 in FY2025; down 59 since Aug 2024–Jul 2025.
93	Unified Business Technologies, Inc. Top agencies DOI (Department of the Interior)	$1,834,124	<0.1%	Rank history: not on the FY2021–FY2025 lists; up 24 since Aug 2024–Jul 2025.
94	UHU Technologies LLC Top agencies Army (Department of the Army)	$1,779,397	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
95	KCF Technologies, Inc. Top agencies Navy (Department of the Navy)	$1,772,570	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
96	Piasecki Aircraft Corp Top agencies Army (Department of the Army)	$1,685,908	<0.1%	Rank history: not on the FY2021–FY2024 lists and #96 in FY2025; up 4 since Aug 2024–Jul 2025.
97	Science & Technology Corporation Top agencies Commerce (Department of Commerce)	$1,517,999	<0.1%	Rank history: not on the FY2021 list, #82 in FY2022, #72 in FY2023, #63 in FY2024 and #59 in FY2025; down 46 since Aug 2024–Jul 2025.
98	Quantum Semiconductor LLC Top agencies Navy (Department of the Navy)	$1,484,822	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
99	Datapath, Inc. Top agencies Army (Department of the Army)	$1,446,081	<0.1%	Rank history: not on the FY2021–FY2025 lists; up 29 since Aug 2024–Jul 2025.
100	Lovelace Biomedical Research Institute Top agencies HHS (Department of Health and Human Services)	$1,282,991	<0.1%	Rank history: not on the FY2021–FY2025 lists; up 31 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 $9.34 billion 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