Top 100 Contractors in NAICS 541715: Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology), FY2021

Name: Top 100 Contractors in NAICS 541715: Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology), FY2021
Creator: GovTribe
License: https://creativecommons.org/licenses/by/4.0/

Parent companies by net contract obligations Oct 1, 2020 – Sep 30, 2021 Code page on GovTribe

The top 10 won 50% of FY2021 NAICS 541715 contract dollars

Contract obligations: $30,006,125,499 Net of deobligations, by contracts coded NAICS 541715
Contractors: 3,941 Parent companies with an obligation
Largest contractor: Lockheed Martin Corporation $3.85 billion, 12.6% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV · Free to reuse with credit to GovTribe (CC BY 4.0)

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Lockheed Martin Corporation 26 awardees Top agencies USAF (Department of the Air Force) MDA (DOD Missile Defense Agency) Navy (Department of the Navy)	$3,847,457,972	12.6%	Rank history: #1 in FY2022, #1 in FY2023, #1 in FY2024 and #1 in FY2025; up 2 since FY2020.
2	Fluor Corporation Through Fluor Marine Propulsion, LLC Top agencies DOE (Department of Energy) Navy (Department of the Navy)	$3,053,730,401	10.0%	Rank history: #2 in FY2022, #2 in FY2023, #2 in FY2024 and #2 in FY2025; up 5 since FY2020.
3	California Institute of Technology 2 awardees Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency)	$2,301,683,423	7.5%	Rank history: #3 in FY2022, #3 in FY2023, #3 in FY2024 and #3 in FY2025; down 2 since FY2020.
4	Leidos Holdings, Inc. 9 awardees, including Leidos Biomedical Research Inc., Leidos, Inc. and Dynetics, Inc. Top agencies HHS (Department of Health and Human Services) NASA (National Aeronautics and Space Administration) DOE (Department of Energy)	$1,362,590,252	4.5%	Rank history: #4 in FY2022, #5 in FY2023, #5 in FY2024 and #8 in FY2025; unchanged since FY2020.
5	The Mitre Corporation Top agencies OSD (Office of the Secretary of Defense) Army (Department of the Army) USAF (Department of the Air Force)	$1,306,013,912	4.3%	Rank history: #5 in FY2022, #6 in FY2023, #8 in FY2024 and #11 in FY2025; unchanged since FY2020.
6	The Aerospace Corporation Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration) DOE (Department of Energy)	$1,145,892,565	3.7%	Rank history: #7 in FY2022, #8 in FY2023, #7 in FY2024 and #7 in FY2025; unchanged since FY2020.
7	Northrop Grumman Corporation 33 awardees, including Northrop Grumman Systems Corporation and Orbital Sciences LLC Top agencies MDA (DOD Missile Defense Agency) USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency)	$1,065,424,357	3.5%	Rank history: #6 in FY2022, #4 in FY2023, #4 in FY2024 and #6 in FY2025; up 2 since FY2020.
8	Space Exploration Technologies Corp. Top agencies NASA (National Aeronautics and Space Administration) OSD (Office of the Secretary of Defense) SDA (Space Development Agency)	$442,350,468	1.4%	Rank history: #8 in FY2022, #9 in FY2023, #12 in FY2024 and #30 in FY2025; up 22 since FY2020.
9	RTX Corporation 29 awardees, including Raytheon Company, RTX BBN Technologies, Inc. and Blue Canyon Technologies LLC Top agencies DARPA (Defense Advanced Research Projects Agency) USAF (Department of the Air Force) Navy (Department of the Navy)	$434,845,749	1.4%	Rank history: #12 in FY2022, #14 in FY2023, #16 in FY2024 and #20 in FY2025; up 3 since FY2020.
10	Georgia TECH Research Corp 2 awardees, including Georgia TECH Applied Research Corp Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$411,565,666	1.3%	Rank history: #11 in FY2022, #11 in FY2023, #79 in FY2024 and not on the FY2025 list; down 2 since FY2020.
11	Alion Science and Technology Corporation 2 awardees, including HII Mission Technologies Corp Top agencies Navy (Department of the Navy) OSD (Office of the Secretary of Defense) USAF (Department of the Air Force)	$406,356,369	1.3%	Rank history: not on the FY2022 list, #10 in FY2023, #74 in FY2024 and not on the FY2025 list; up 3 since FY2020.
12	The Johns Hopkins University 2 awardees, including The Johns Hopkins University Applied Physics Laboratory LLC Top agencies MDA (DOD Missile Defense Agency) NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force)	$383,055,657	1.3%	Rank history: #9 in FY2022, #7 in FY2023, #23 in FY2024 and not on the FY2025 list; down 2 since FY2020.
13	Booz Allen Hamilton Holding Corporation 2 awardees, including Booz Allen Hamilton Inc. and Riverside Engineering LLC Top agencies USAF (Department of the Air Force) OSD (Office of the Secretary of Defense) Army (Department of the Army)	$379,896,124	1.2%	Rank history: #10 in FY2022, #13 in FY2023, #9 in FY2024 and #9 in FY2025; up 4 since FY2020.
14	Kbr, Inc. 9 awardees, including KBR Wyle Services, LLC and Pacific Defense Solutions LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$333,121,141	1.1%	Rank history: #13 in FY2022, #12 in FY2023, #30 in FY2024 and not on the FY2025 list; up 4 since FY2020.
15	Jacobs Engineering Group Inc. 8 awardees, including Amentum Technology, Inc., The Keyw Corporation and Sotera Defense Solutions, Inc. Top agencies NASA (National Aeronautics and Space Administration) Navy (Department of the Navy) Army (Department of the Army)	$267,270,858	0.9%	Rank history: #19 in FY2022, #19 in FY2023 and not on the FY2024–FY2025 lists; up 4 since FY2020.
16	Blue Origin Federation, LLC Top agencies NASA (National Aeronautics and Space Administration)	$252,615,202	0.8%	Rank history: not on the FY2022–FY2025 lists; down 5 since FY2020.
17	Mantech Tsg-2 Joint Venture Top agencies Navy (Department of the Navy) OSD (Office of the Secretary of Defense) USAF (Department of the Air Force)	$250,399,333	0.8%	Rank history: #22 in FY2022, #26 in FY2023, #15 in FY2024 and #23 in FY2025; down 1 since FY2020.
18	L3Harris Technologies, Inc. 25 awardees, including L3 Technologies, Inc., Fisica Applied Technologies, Inc. and L3 Adaptive Methods, Inc. Top agencies USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency) OSD (Office of the Secretary of Defense)	$226,945,365	0.7%	Rank history: #16 in FY2022, #23 in FY2023, #27 in FY2024 and #25 in FY2025; up 8 since FY2020.
19	CACI International Inc. 7 awardees, including Caci Technologies, LLC, Caci, Inc. - Federal and LGS Innovations LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency)	$215,190,404	0.7%	Rank history: #20 in FY2022, #15 in FY2023, #10 in FY2024 and #10 in FY2025; up 10 since FY2020.
20	Thermo Electron Corporation 3 awardees, including Nalge Nunc International Corporation, Fisher Bioservices Inc. and Life Technologies Corporation Top agencies USAF (Department of the Air Force) HHS (Department of Health and Human Services) Army (Department of the Army)	$202,992,851	0.7%	Rank history: not on the FY2022–FY2025 lists; up 204 since FY2020.
21	The Pennsylvania State University 2 awardees Top agencies Navy (Department of the Navy) DARPA (Defense Advanced Research Projects Agency) Army (Department of the Army)	$190,428,792	0.6%	Rank history: #21 in FY2022, #20 in FY2023, #22 in FY2024 and #26 in FY2025; down 6 since FY2020.
22	The Boeing Company 14 awardees, including HRL Laboratories, LLC and Aurora Flight Sciences Corporation Top agencies MDA (DOD Missile Defense Agency) DARPA (Defense Advanced Research Projects Agency) USAF (Department of the Air Force)	$189,625,456	0.6%	Rank history: #23 in FY2022, #24 in FY2023, #19 in FY2024 and #21 in FY2025; down 1 since FY2020.
23	Science Systems and Applications, Inc. Top agencies NASA (National Aeronautics and Space Administration)	$187,042,203	0.6%	Rank history: #25 in FY2022, #29 in FY2023, #32 in FY2024 and #48 in FY2025; down 10 since FY2020.
24	Parsons Corporation 7 awardees, including Parsons Government Services Inc., Space Ground System Solutions, Inc. and Polaris Alpha Advanced Systems Inc. Top agencies MDA (DOD Missile Defense Agency) Army (Department of the Army) Navy (Department of the Navy)	$185,566,256	0.6%	Rank history: #15 in FY2022, #17 in FY2023, #17 in FY2024 and #14 in FY2025; up 75 since FY2020.
25	Battelle Savannah River Alliance, LLC Top agencies DOE (Department of Energy)	$171,618,297	0.6%	Rank history: not on the FY2022–FY2023 lists, #25 in FY2024 and #27 in FY2025; new, not ranked in FY2020.
26	Linquest Corporation 3 awardees, including The Perduco Group, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) DARPA (Defense Advanced Research Projects Agency)	$138,001,880	0.5%	Rank history: #26 in FY2022, #25 in FY2023, #26 in FY2024 and #28 in FY2025; down 1 since FY2020.
27	Leidos Biomedical Research Inc. Top agencies HHS (Department of Health and Human Services)	$134,090,254	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
28	Assured Information Security, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency)	$133,719,140	0.4%	Rank history: #42 in FY2022, #59 in FY2023, #62 in FY2024 and #84 in FY2025; down 8 since FY2020.
29	Frontier Technology Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$129,655,433	0.4%	Rank history: #32 in FY2022, #38 in FY2023, #40 in FY2024 and #64 in FY2025; up 14 since FY2020.
30	Battelle Memorial Institute 4 awardees, including Battelle Savannah River Alliance, LLC and Seebyte Limited Top agencies OSD (Office of the Secretary of Defense) DARPA (Defense Advanced Research Projects Agency) USAF (Department of the Air Force)	$128,256,563	0.4%	Rank history: #18 in FY2022, #16 in FY2023, #24 in FY2024 and #32 in FY2025; up 60 since FY2020.
31	Qinetiq Group PLC 3 awardees, including Qinetiq Inc. and Qinetiq Special Projects, Inc. Top agencies Army (Department of the Army) DOI (Department of the Interior) Navy (Department of the Navy)	$123,414,679	0.4%	Rank history: #28 in FY2022, #41 in FY2023 and not on the FY2024–FY2025 lists; up 2 since FY2020.
32	General Atomic Technologies Corporation 3 awardees, including General Atomics and General Atomics Aeronautical Systems, Inc. Top agencies DOE (Department of Energy) DARPA (Defense Advanced Research Projects Agency) MDA (DOD Missile Defense Agency)	$122,357,762	0.4%	Rank history: #44 in FY2022, #21 in FY2023, #61 in FY2024 and not on the FY2025 list; down 9 since FY2020.
33	Systems & Technology Research LLC Top agencies DARPA (Defense Advanced Research Projects Agency) USAF (Department of the Air Force) Navy (Department of the Navy)	$117,134,051	0.4%	Rank history: #41 in FY2022, #36 in FY2023, #46 in FY2024 and #62 in FY2025; down 2 since FY2020.
34	Sri International Top agencies DARPA (Defense Advanced Research Projects Agency) HHS (Department of Health and Human Services) USAF (Department of the Air Force)	$110,270,775	0.4%	Rank history: #33 in FY2022, #43 in FY2023, #48 in FY2024 and #59 in FY2025; down 7 since FY2020.
35	Science Applications International Corporation 2 awardees Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) OSD (Office of the Secretary of Defense)	$110,048,389	0.4%	Rank history: #27 in FY2022, #28 in FY2023, #21 in FY2024 and #24 in FY2025; down 7 since FY2020.
36	Orasure Technologies Inc. Top agencies USAF (Department of the Air Force)	$109,000,000	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
37	Fibertek, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) WHS (DOD Washington Headquarters Service)	$98,458,929	0.3%	Rank history: #39 in FY2022, #49 in FY2023, #41 in FY2024 and #76 in FY2025; up 4 since FY2020.
38	General Electric Company 5 awardees, including GE Aviation Systems LLC and GE Energy Power Conversion Naval Systems Inc. Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency)	$93,717,539	0.3%	Rank history: #37 in FY2022, #32 in FY2023, #34 in FY2024 and #43 in FY2025; up 16 since FY2020.
39	General Dynamics Corporation 13 awardees, including Applied Physical Sciences Corp, General Dynamics Information Technology, Inc. and Electric Boat Corporation Top agencies DARPA (Defense Advanced Research Projects Agency) Navy (Department of the Navy) Army (Department of the Army)	$81,712,926	0.3%	Rank history: #30 in FY2022, #22 in FY2023, #20 in FY2024 and #17 in FY2025; down 2 since FY2020.
40	Perspecta Inc. 5 awardees, including Peraton Labs Inc., Peraton Technology Services Inc. and Peraton Services & Solutions Inc. Top agencies DARPA (Defense Advanced Research Projects Agency) USAF (Department of the Air Force) OSD (Office of the Secretary of Defense)	$78,256,405	0.3%	Rank history: not on the FY2022–FY2025 lists; up 46 since FY2020.
41	University of Dayton Top agencies USAF (Department of the Air Force) DTRA (Defense Threat Reduction Agency) WHS (DOD Washington Headquarters Service)	$75,750,113	0.2%	Rank history: #48 in FY2022, #45 in FY2023, #39 in FY2024 and #31 in FY2025; down 6 since FY2020.
42	BAE Systems PLC 12 awardees, including BAE Systems Information & Electronic Systems Integration Inc. and BAE Systems Land & Armaments L.P. Top agencies DARPA (Defense Advanced Research Projects Agency) Navy (Department of the Navy) USAF (Department of the Air Force)	$72,148,184	0.2%	Rank history: #34 in FY2022, #27 in FY2023, #31 in FY2024 and #35 in FY2025; down 10 since FY2020.
43	Southwest Research Institute 2 awardees, including Signature Science LLC Top agencies USAF (Department of the Air Force) DTRA (Defense Threat Reduction Agency) Army (Department of the Army)	$71,732,716	0.2%	Rank history: #43 in FY2022, #42 in FY2023, #42 in FY2024 and #50 in FY2025; up 50 since FY2020.
44	DCS Corporation 2 awardees Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$69,997,258	0.2%	Rank history: #56 in FY2022, #64 in FY2023 and not on the FY2024–FY2025 lists; up 22 since FY2020.
45	Mantech International Corporation 2 awardees, including Mantech Advanced Systems International, Inc. and Mantech SRS Technologies, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$69,734,801	0.2%	Rank history: #29 in FY2022, #37 in FY2023, #69 in FY2024 and not on the FY2025 list; up 153 since FY2020.
46	American Electronic Warfare Associates, Incorporated Top agencies Navy (Department of the Navy)	$69,729,807	0.2%	Rank history: #49 in FY2022, #44 in FY2023 and not on the FY2024–FY2025 lists; up 15 since FY2020.
47	Danaher Corporation 3 awardees, including Cepheid, Western Environmental Technology Laboratories, Inc. and Beckman Coulter Inc. Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration) HHS (Department of Health and Human Services)	$66,116,124	0.2%	Rank history: not on the FY2022–FY2025 lists; up 370 since FY2020.
48	Range Generation Next LLC Top agencies Army (Department of the Army)	$63,871,126	0.2%	Rank history: #69 in FY2022, #73 in FY2023, #77 in FY2024 and not on the FY2025 list; down 8 since FY2020.
49	Barrios Technology, LLC Top agencies NASA (National Aeronautics and Space Administration)	$63,026,589	0.2%	Rank history: #50 in FY2022, #65 in FY2023, #58 in FY2024 and #86 in FY2025; up 88 since FY2020.
50	On Assignment, Inc. Through ECS Federal, LLC Top agencies DISA (Defense Information Systems Agency) WHS (DOD Washington Headquarters Service)	$60,240,590	0.2%	Rank history: not on the FY2022–FY2025 lists; up 27 since FY2020.
51	Modern Technology Solutions, Inc. Top agencies MDA (DOD Missile Defense Agency) OSD (Office of the Secretary of Defense) USAF (Department of the Air Force)	$58,445,313	0.2%	Rank history: #89 in FY2022, #74 in FY2023, #83 in FY2024 and #46 in FY2025; up 24 since FY2020.
52	Two Six Labs Holdings, Inc. Through Two Six Labs, LLC Top agencies DARPA (Defense Advanced Research Projects Agency) WHS (DOD Washington Headquarters Service) OSD (Office of the Secretary of Defense)	$57,327,536	0.2%	Rank history: #57 in FY2022, #68 in FY2023 and not on the FY2024–FY2025 lists; down 6 since FY2020.
53	Seakr Engineering, LLC Top agencies USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency)	$57,245,791	0.2%	Rank history: not on the FY2022–FY2025 lists; up 45 since FY2020.
54	Ball Corp 2 awardees, including Ball Aerospace & Technologies Corp. and BAE Systems Space & Mission Systems Inc. Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration) Army (Department of the Army)	$56,381,789	0.2%	Rank history: #59 in FY2022, #63 in FY2023 and not on the FY2024–FY2025 lists; up 19 since FY2020.
55	Kratos Defense & Security Solutions, Inc. 8 awardees, including Kratos Unmanned Aerial Systems, Inc., Florida Turbine Technologies, Inc. and Kratos Defense & Rocket Support Services, Inc. Top agencies USAF (Department of the Air Force) MDA (DOD Missile Defense Agency) OSD (Office of the Secretary of Defense)	$53,739,288	0.2%	Rank history: #38 in FY2022, #48 in FY2023, #97 in FY2024 and not on the FY2025 list; up 116 since FY2020.
56	Applied Research Associates, Inc. 2 awardees, including Neya Systems LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) OSD (Office of the Secretary of Defense)	$46,665,955	0.2%	Rank history: #84 in FY2022, #57 in FY2023, #56 in FY2024 and #78 in FY2025; down 3 since FY2020.
57	Assurance Technology Corp Top agencies Navy (Department of the Navy)	$46,389,247	0.2%	Rank history: #55 in FY2022, #53 in FY2023, #66 in FY2024 and #36 in FY2025; up 15 since FY2020.
58	Bastion Technologies, Inc. Top agencies NASA (National Aeronautics and Space Administration) Army (Department of the Army)	$44,830,757	0.1%	Rank history: #67 in FY2022, #83 in FY2023, #93 in FY2024 and #95 in FY2025; down 1 since FY2020.
59	Utah State University 2 awardees, including Utah State University Space Dynamics Laboratory Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) NASA (National Aeronautics and Space Administration)	$44,199,366	0.1%	Rank history: #40 in FY2022, #33 in FY2023 and not on the FY2024–FY2025 lists; up 3 since FY2020.
60	Duke University Top agencies HHS (Department of Health and Human Services) DHS (Department of Homeland Security) DARPA (Defense Advanced Research Projects Agency)	$44,104,997	0.1%	Rank history: #65 in FY2022, #78 in FY2023 and not on the FY2024–FY2025 lists; down 4 since FY2020.
61	Physical Sciences Inc. 4 awardees, including Faraday Technology, Inc., Q-Peak, Incorporated and Research Support Instruments, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency)	$42,918,199	0.1%	Rank history: #53 in FY2022, #80 in FY2023, #80 in FY2024 and #91 in FY2025; up 28 since FY2020.
62	The Regents of the University of Colorado 3 awardees Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force) Army (Department of the Army)	$42,828,075	0.1%	Rank history: not on the FY2022–FY2025 lists; up 38 since FY2020.
63	Westat, Inc. Top agencies HHS (Department of Health and Human Services) Navy (Department of the Navy) DOT (Department of Transportation)	$42,682,846	0.1%	Rank history: not on the FY2022 list, #85 in FY2023, #85 in FY2024 and #67 in FY2025; up 76 since FY2020.
64	Bluehalo, LLC Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration) DARPA (Defense Advanced Research Projects Agency)	$42,169,895	0.1%	Rank history: #63 in FY2022, #72 in FY2023, #67 in FY2024 and not on the FY2025 list; up 12 since FY2020.
65	General Technical Services LLC Top agencies Army (Department of the Army)	$40,898,061	0.1%	Rank history: #96 in FY2022 and not on the FY2023–FY2025 lists; up 6 since FY2020.
66	Spectral MD, Inc. Top agencies HHS (Department of Health and Human Services) Army (Department of the Army)	$40,501,178	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
67	Sonalysts Inc. Top agencies USAF (Department of the Air Force) MDA (DOD Missile Defense Agency) Navy (Department of the Navy)	$39,970,003	0.1%	Rank history: not on the FY2022 list, #89 in FY2023 and not on the FY2024–FY2025 lists; down 19 since FY2020.
68	State of California Controllers Office 17 awardees, including The Regents of the University of California, The Regents of the University of California. San Francisco and University of California, Santa Barbara Top agencies HHS (Department of Health and Human Services) NASA (National Aeronautics and Space Administration) DARPA (Defense Advanced Research Projects Agency)	$39,621,912	0.1%	Rank history: #35 in FY2022, #56 in FY2023 and not on the FY2024–FY2025 lists; down 18 since FY2020.
69	Aptima Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$39,444,821	0.1%	Rank history: not on the FY2022–FY2025 lists; up 11 since FY2020.
70	Centrus Energy Corp. Through American Centrifuge Operating, LLC Top agencies DOE (Department of Energy)	$38,943,667	0.1%	Rank history: #80 in FY2022 and not on the FY2023–FY2025 lists; up 49 since FY2020.
71	Aerojet Rocketdyne Holdings, Inc. 4 awardees, including Aerojet Rocketdyne Inc. and Aerojet Rocketdyne of DE, Inc. Top agencies USAF (Department of the Air Force) MDA (DOD Missile Defense Agency) DARPA (Defense Advanced Research Projects Agency)	$38,757,484	0.1%	Rank history: not on the FY2022–FY2025 lists; up 40 since FY2020.
72	J.f. Taylor, Inc. Top agencies Navy (Department of the Navy)	$38,535,411	0.1%	Rank history: #75 in FY2022, #86 in FY2023, #96 in FY2024 and #68 in FY2025; down 2 since FY2020.
73	Innovative Defense Technologies, LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$38,320,003	0.1%	Rank history: #74 in FY2022, #47 in FY2023 and not on the FY2024–FY2025 lists; down 14 since FY2020.
74	Technology Service Corp Top agencies USSOCOM (United States Special Operations Command) Navy (Department of the Navy) MDA (DOD Missile Defense Agency)	$38,205,435	0.1%	Rank history: #45 in FY2022, #31 in FY2023, #36 in FY2024 and #38 in FY2025; down 27 since FY2020.
75	Triton Systems, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) MDA (DOD Missile Defense Agency)	$37,894,300	0.1%	Rank history: not on the FY2022–FY2025 lists; up 39 since FY2020.
76	BAE Systems Land & Armaments L.P. 9 awardees, including BAE Systems Information & Electronic Systems Integration Inc. and BAE Systems Controls Inc. Top agencies DARPA (Defense Advanced Research Projects Agency) USAF (Department of the Air Force) Navy (Department of the Navy)	$36,697,273	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
77	Black River Systems Company, Inc. Top agencies USAF (Department of the Air Force) MDA (DOD Missile Defense Agency) OSD (Office of the Secretary of Defense)	$35,034,865	0.1%	Rank history: #70 in FY2022 and not on the FY2023–FY2025 lists; down 35 since FY2020.
78	University of Washington 2 awardees Top agencies Navy (Department of the Navy) HHS (Department of Health and Human Services) DARPA (Defense Advanced Research Projects Agency)	$35,034,545	0.1%	Rank history: #64 in FY2022, #61 in FY2023 and not on the FY2024–FY2025 lists; up 106 since FY2020.
79	CNF Technologies Corporation Top agencies USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency) OSD (Office of the Secretary of Defense)	$34,777,757	0.1%	Rank history: #85 in FY2022 and not on the FY2023–FY2025 lists; down 11 since FY2020.
80	Charles River Analytics, Inc. Top agencies DARPA (Defense Advanced Research Projects Agency) Navy (Department of the Navy) Army (Department of the Army)	$34,590,444	0.1%	Rank history: #86 in FY2022 and not on the FY2023–FY2025 lists; down 13 since FY2020.
81	Radiance Technologies Inc. Top agencies USAF (Department of the Air Force) WHS (DOD Washington Headquarters Service) DARPA (Defense Advanced Research Projects Agency)	$34,094,132	0.1%	Rank history: #82 in FY2022 and not on the FY2023–FY2025 lists; down 37 since FY2020.
82	Torch Technologies Inc. Top agencies Army (Department of the Army) MDA (DOD Missile Defense Agency) USAF (Department of the Air Force)	$34,038,701	0.1%	Rank history: not on the FY2022–FY2023 lists, #51 in FY2024 and #54 in FY2025; down 46 since FY2020.
83	York Space Systems LLC Top agencies OSD (Office of the Secretary of Defense)	$33,489,893	0.1%	Rank history: #58 in FY2022 and not on the FY2023–FY2025 lists; up 63 since FY2020.
84	Invictus International Consulting LLC Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$32,532,463	0.1%	Rank history: not on the FY2022–FY2025 lists; up 3 since FY2020.
85	Mercury Computer Systems Inc. 4 awardees, including Physical Optics Corporation, Mercury Systems Inc. and Mercury Defense Systems, Inc. Top agencies Navy (Department of the Navy) DARPA (Defense Advanced Research Projects Agency) USAF (Department of the Air Force)	$32,515,028	0.1%	Rank history: #52 in FY2022, #50 in FY2023, #99 in FY2024 and not on the FY2025 list; up 110 since FY2020.
86	Icahn School of Medicine at Mount Sinai Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$32,326,541	0.1%	Rank history: not on the FY2022 list, #82 in FY2023 and not on the FY2024–FY2025 lists; up 32 since FY2020.
87	Dzyne Technologies, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) DARPA (Defense Advanced Research Projects Agency)	$32,058,700	0.1%	Rank history: not on the FY2022–FY2024 lists and #80 in FY2025; down 53 since FY2020.
88	Camgian Corporation Top agencies Army (Department of the Army)	$31,979,564	0.1%	Rank history: not on the FY2022–FY2025 lists; up 201 since FY2020.
89	International Business Machines Corporation 4 awardees Top agencies OSD (Office of the Secretary of Defense) DARPA (Defense Advanced Research Projects Agency) HHS (Department of Health and Human Services)	$31,773,829	0.1%	Rank history: not on the FY2022–FY2025 lists; up 15 since FY2020.
90	Sierra Nevada Company, LLC 3 awardees, including Kutta Technologies, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$31,174,808	0.1%	Rank history: #98 in FY2022 and not on the FY2023–FY2025 lists; up 11 since FY2020.
91	The Charles Stark Draper Laboratory, Inc. Top agencies USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency) Navy (Department of the Navy)	$31,136,198	0.1%	Rank history: not on the FY2022–FY2025 lists; down 26 since FY2020.
92	Teledyne Technologies Incorporated 5 awardees, including Teledyne Brown Engineering, Inc., Teledyne Scientific & Imaging, LLC and Teledyne Energy Systems, Inc. Top agencies Navy (Department of the Navy) DARPA (Defense Advanced Research Projects Agency) NASA (National Aeronautics and Space Administration)	$30,845,256	0.1%	Rank history: #92 in FY2022, #51 in FY2023, #33 in FY2024 and #52 in FY2025; up 3 since FY2020.
93	George Mason University Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DOT (Department of Transportation)	$30,762,844	0.1%	Rank history: not on the FY2022–FY2025 lists; down 29 since FY2020.
94	Arctic Slope Regional Corporation 6 awardees, including Asrc Federal System Solutions LLC, Netcentric Technology, LLC and AS and D, LLC Top agencies Navy (Department of the Navy) DHRA (Defense Human Resources Activity) USAF (Department of the Air Force)	$30,049,799	0.1%	Rank history: #62 in FY2022, #81 in FY2023, #60 in FY2024 and #66 in FY2025; up 95 since FY2020.
95	Space Systems/Loral LLC 5 awardees, including Maxar Mission Solutions Inc., Vantor Services Inc. and Maxar Space Robotics LLC Top agencies NGA (Department of Defense National Geospatial Intelligence Agency) USAF (Department of the Air Force) DHS (Department of Homeland Security)	$29,887,689	0.1%	Rank history: not on the FY2022–FY2025 lists; up 46 since FY2020.
96	Five Stones Research Corporation Top agencies Army (Department of the Army) MDA (DOD Missile Defense Agency)	$29,510,581	0.1%	Rank history: not on the FY2022–FY2025 lists; up 6 since FY2020.
97	Siemens Aktiengesellschaft 4 awardees, including Siemens Healthcare Diagnostics Inc., Siemens Corporation and Siemens Government Technologies Inc. Top agencies HHS (Department of Health and Human Services) DARPA (Defense Advanced Research Projects Agency) Navy (Department of the Navy)	$29,490,164	0.1%	Rank history: not on the FY2022–FY2025 lists; up 52 since FY2020.
98	The Johns Hopkins University Applied Physics Laboratory LLC Top agencies USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$29,434,125	0.1%	Rank history: not on the FY2022–FY2023 lists, #6 in FY2024 and not on the FY2025 list; up 64 since FY2020.
99	ABT Global LLC Top agencies HHS (Department of Health and Human Services)	$28,481,605	0.1%	Rank history: not on the FY2022–FY2025 lists; up 6 since FY2020.
100	Honeywell International Inc. 9 awardees Top agencies USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency) Navy (Department of the Navy)	$27,966,639	0.1%	Rank history: #81 in FY2022 and not on the FY2023–FY2025 lists; up 24 since FY2020.

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100 of 3,941 contractors listed here. See the rest on GovTribe.

How this ranking works

Source: every contract action FPDS records (as published on SAM.gov) in the period, as GovTribe received it.
Amounts are net obligations: what was obligated, less what was deobligated. Shares are of $30.6 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. 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.
Fiscal year 2021 ran Oct 1, 2020 – Sep 30, 2021. The Department of Defense reports its contract actions to FPDS about 90 days late, so a fiscal year is ranked once they're in, in February, and the list doesn't change after.
Rank changes compare with FY2020. "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. The step from FY2020 takes the color of the rank change beside it.
Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

Quick answers

Who were the top 10 NAICS 541715 contractors in FY2021?

1. Lockheed Martin Corporation ($3.85B), 2. Fluor Corporation ($3.05B), 3. California Institute of Technology ($2.3B), 4. Leidos Holdings, Inc. ($1.36B), 5. The Mitre Corporation ($1.31B), 6. The Aerospace Corporation ($1.15B), 7. Northrop Grumman Corporation ($1.07B), 8. Space Exploration Technologies Corp. ($442M), 9. RTX Corporation ($435M), 10. Georgia TECH Research Corp ($412M).

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