Top 100 Contractors in NAICS 54171: Research and Development in the Physical, Engineering, and Life Sciences, FY2023

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Lockheed Martin Corporation 34 awardees Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) MDA (DOD Missile Defense Agency)	$5,539,377,050	8.6%	Rank history: #1 in FY2021, #1 in FY2022, #1 in FY2024 and #1 in FY2025; unchanged since FY2022.
2	Fluor Corporation Through Fluor Marine Propulsion, LLC Top agencies DOE (Department of Energy) Navy (Department of the Navy)	$3,543,725,464	5.5%	Rank history: #2 in FY2021, #2 in FY2022, #2 in FY2024 and #2 in FY2025; unchanged since FY2022.
3	California Institute of Technology 2 awardees Top agencies NASA (National Aeronautics and Space Administration) DARPA (Defense Advanced Research Projects Agency) HHS (Department of Health and Human Services)	$2,793,336,193	4.3%	Rank history: #3 in FY2021, #3 in FY2022, #4 in FY2024 and #3 in FY2025; unchanged since FY2022.
4	Northrop Grumman Corporation 36 awardees, including Northrop Grumman Systems Corporation Top agencies MDA (DOD Missile Defense Agency) USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration)	$2,466,410,360	3.8%	Rank history: #6 in FY2021, #5 in FY2022, #3 in FY2024 and #5 in FY2025; up 1 since FY2022.
5	Leidos Holdings, Inc. 12 awardees, including Leidos Biomedical Research Inc., Leidos, Inc. and Dynetics, Inc. Top agencies HHS (Department of Health and Human Services) Army (Department of the Army) USAF (Department of the Air Force)	$2,021,852,598	3.1%	Rank history: #4 in FY2021, #4 in FY2022, #5 in FY2024 and #7 in FY2025; down 1 since FY2022.
6	Analytic Services Inc. Through Advanced Technology International Top agencies HHS (Department of Health and Human Services) Navy (Department of the Navy) DLA (Defense Logistics Agency)	$1,764,518,141	2.7%	Rank history: not on the FY2021–FY2022 lists, #11 in FY2024 and not on the FY2025 list; up 166 since FY2022.
7	The Johns Hopkins University 2 awardees, including The Johns Hopkins University Applied Physics Laboratory LLC Top agencies Navy (Department of the Navy) NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force)	$1,690,856,402	2.6%	Rank history: #11 in FY2021, #7 in FY2022, #32 in FY2024 and not on the FY2025 list; unchanged since FY2022.
8	The Mitre Corporation Top agencies AAFES (Department of Defense Army and Air Force Exchange Service) OSD (Office of the Secretary of Defense) Army (Department of the Army)	$1,566,652,244	2.4%	Rank history: #7 in FY2021, #6 in FY2022, #13 in FY2024 and #13 in FY2025; down 2 since FY2022.
9	Massachusetts Institute of Technology 2 awardees Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DARPA (Defense Advanced Research Projects Agency)	$1,373,976,650	2.1%	Rank history: #9 in FY2021, #9 in FY2022, #6 in FY2024 and #8 in FY2025; unchanged since FY2022.
10	Alliance for Energy Innovation, LLC Top agencies DOE (Department of Energy) USAID (US Agency for International Development) OSD (Office of the Secretary of Defense)	$1,288,629,762	2.0%	Rank history: #18 in FY2021, #17 in FY2022, #10 in FY2024 and #15 in FY2025; up 7 since FY2022.
11	The Aerospace Corporation Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration) DOE (Department of Energy)	$1,270,578,096	2.0%	Rank history: #10 in FY2021, #8 in FY2022, #8 in FY2024 and #9 in FY2025; down 3 since FY2022.
12	Science Applications International Corporation 2 awardees, including Engility Services, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration)	$1,203,721,952	1.9%	Rank history: #13 in FY2021, #10 in FY2022, #12 in FY2024 and #16 in FY2025; down 2 since FY2022.
13	Booz Allen Hamilton Holding Corporation 3 awardees, including Booz Allen Hamilton Inc. and Riverside Engineering LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$989,067,069	1.5%	Rank history: #14 in FY2021, #12 in FY2022, #9 in FY2024 and #10 in FY2025; down 1 since FY2022.
14	RTX Corporation 48 awardees, including Raytheon Company, RTX BBN Technologies, Inc. and Rockwell Collins, Inc. Top agencies USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency) Navy (Department of the Navy)	$961,522,479	1.5%	Rank history: #8 in FY2021, #15 in FY2022, #22 in FY2024 and #21 in FY2025; up 1 since FY2022.
15	Space Exploration Technologies Corp. Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force) OSD (Office of the Secretary of Defense)	$939,766,690	1.5%	Rank history: #22 in FY2021, #14 in FY2022, #20 in FY2024 and #38 in FY2025; down 1 since FY2022.
16	Kbr, Inc. 9 awardees, including KBR Wyle Services, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$881,165,283	1.4%	Rank history: #15 in FY2021, #18 in FY2022, #39 in FY2024 and not on the FY2025 list; up 2 since FY2022.
17	Brookhaven Science Associates LLC Top agencies DOE (Department of Energy)	$789,434,033	1.2%	Rank history: #17 in FY2021, #13 in FY2022, #14 in FY2024 and #17 in FY2025; down 4 since FY2022.
18	Alion Science and Technology Corporation 3 awardees, including HII Mission Technologies Corp Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$785,001,349	1.2%	Rank history: #16 in FY2021, #61 in FY2022 and not on the FY2024–FY2025 lists; up 43 since FY2022.
19	Jacobs Engineering Group Inc. 12 awardees, including Amentum Technology, Inc. and The Keyw Corporation Top agencies MDA (DOD Missile Defense Agency) NASA (National Aeronautics and Space Administration) Navy (Department of the Navy)	$774,308,350	1.2%	Rank history: #12 in FY2021, #11 in FY2022, #40 in FY2024 and not on the FY2025 list; down 8 since FY2022.
20	CACI International Inc. 11 awardees, including Caci, Inc. - Federal, Caci Technologies, LLC and LGS Innovations LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) DARPA (Defense Advanced Research Projects Agency)	$731,285,509	1.1%	Rank history: #25 in FY2021, #23 in FY2022, #16 in FY2024 and #11 in FY2025; up 3 since FY2022.
21	Georgia TECH Research Corp 2 awardees, including Georgia TECH Applied Research Corp Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$709,694,989	1.1%	Rank history: #21 in FY2021, #20 in FY2022 and not on the FY2024–FY2025 lists; down 1 since FY2022.
22	Battelle Memorial Institute 4 awardees, including Battelle Savannah River Alliance, LLC and Battelle National Biodefense Institute, LLC Top agencies DOE (Department of Energy) USAF (Department of the Air Force) Army (Department of the Army)	$634,938,751	1.0%	Rank history: #28 in FY2021, #25 in FY2022, #30 in FY2024 and #36 in FY2025; up 3 since FY2022.
23	The Boeing Company 20 awardees, including Aurora Flight Sciences Corporation and HRL Laboratories, LLC Top agencies MDA (DOD Missile Defense Agency) USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency)	$614,573,575	0.9%	Rank history: #5 in FY2021, #16 in FY2022, #19 in FY2024 and #27 in FY2025; down 7 since FY2022.
24	General Dynamics Corporation 17 awardees, including General Dynamics Global Force, LLC, General Dynamics Mission Systems, Inc. and Applied Physical Sciences Corp Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$553,073,093	0.9%	Rank history: #30 in FY2021, #26 in FY2022, #28 in FY2024 and #22 in FY2025; up 2 since FY2022.
25	Parsons Corporation 6 awardees, including Parsons Government Services Inc., Space Ground System Solutions, Inc. and Blackhorse, A Parsons LLC Top agencies MDA (DOD Missile Defense Agency) USAF (Department of the Air Force) Army (Department of the Army)	$527,253,173	0.8%	Rank history: #19 in FY2021, #19 in FY2022, #26 in FY2024 and #20 in FY2025; down 6 since FY2022.
26	Torch Technologies Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$497,643,113	0.8%	Rank history: #27 in FY2021, #22 in FY2022, #23 in FY2024 and #25 in FY2025; down 4 since FY2022.
27	Blue Origin Washington, LLC Top agencies NASA (National Aeronautics and Space Administration)	$425,009,984	0.7%	Rank history: not on the FY2021–FY2022 lists, #24 in FY2024 and #18 in FY2025; up 368 since FY2022.
28	Technical Resources International, Inc. Top agencies HHS (Department of Health and Human Services)	$382,807,266	0.6%	Rank history: #77 in FY2021, #92 in FY2022 and not on the FY2024–FY2025 lists; up 64 since FY2022.
29	Aerojet Rocketdyne Holdings, Inc. 5 awardees, including Aerojet Rocketdyne of DE, Inc. and Aerojet Rocketdyne, Inc. Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$373,732,683	0.6%	Rank history: #20 in FY2021, #28 in FY2022 and not on the FY2024–FY2025 lists; down 1 since FY2022.
30	Icon Government and Public Health Solutions Inc. Top agencies HHS (Department of Health and Human Services)	$358,821,099	0.6%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 393 since FY2022.
31	Allucent Government Services (Us) LLC Top agencies HHS (Department of Health and Human Services)	$343,461,460	0.5%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
32	Regeneron Pharmaceuticals Inc. Top agencies HHS (Department of Health and Human Services)	$326,475,488	0.5%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
33	General Atomic Technologies Corporation 4 awardees, including General Atomics Aeronautical Systems, Inc. and General Atomics Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DARPA (Defense Advanced Research Projects Agency)	$322,130,696	0.5%	Rank history: #38 in FY2021, #63 in FY2022, #87 in FY2024 and not on the FY2025 list; up 30 since FY2022.
34	The Pennsylvania State University Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$307,674,487	0.5%	Rank history: #40 in FY2021, #33 in FY2022, #31 in FY2024 and #33 in FY2025; down 1 since FY2022.
35	L3Harris Technologies, Inc. 28 awardees, including L3 Technologies, Inc., L3Harris Technologies Integrated Systems L.P. and Fisica Applied Technologies, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DTRA (Defense Threat Reduction Agency)	$301,019,246	0.5%	Rank history: #26 in FY2021, #29 in FY2022, #17 in FY2024 and #19 in FY2025; down 6 since FY2022.
36	Applied Research Associates, Inc. 2 awardees, including Neya Systems LLC Top agencies DTRA (Defense Threat Reduction Agency) USAF (Department of the Air Force) OSD (Office of the Secretary of Defense)	$293,402,221	0.5%	Rank history: #37 in FY2021, #36 in FY2022, #36 in FY2024 and #40 in FY2025; unchanged since FY2022.
37	Linquest Corporation 3 awardees, including The Perduco Group, Inc. Top agencies USAF (Department of the Air Force) OSD (Office of the Secretary of Defense) Army (Department of the Army)	$285,619,042	0.4%	Rank history: #41 in FY2021, #42 in FY2022, #35 in FY2024 and #35 in FY2025; up 5 since FY2022.
38	Riverside Research Institute 3 awardees, including Applied Research Solutions, Inc. Top agencies USAF (Department of the Air Force) OSD (Office of the Secretary of Defense) WHS (DOD Washington Headquarters Service)	$277,235,222	0.4%	Rank history: #34 in FY2021, #34 in FY2022 and not on the FY2024–FY2025 lists; down 4 since FY2022.
39	Odyssey Systems Consulting Group, Ltd. Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency) Navy (Department of the Navy)	$260,052,385	0.4%	Rank history: #76 in FY2021, #71 in FY2022, #29 in FY2024 and #29 in FY2025; up 32 since FY2022.
40	Mantech Tsg-2 Joint Venture Top agencies Navy (Department of the Navy) Army (Department of the Army) OSD (Office of the Secretary of Defense)	$248,893,297	0.4%	Rank history: #31 in FY2021, #35 in FY2022, #25 in FY2024 and #31 in FY2025; down 5 since FY2022.
41	Radiance Technologies Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) OSD (Office of the Secretary of Defense)	$247,498,627	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 71 since FY2022.
42	Modern Technology Solutions, Inc. Top agencies USAF (Department of the Air Force) OSD (Office of the Secretary of Defense) MDA (DOD Missile Defense Agency)	$232,484,758	0.4%	Rank history: #62 in FY2021, #48 in FY2022, #43 in FY2024 and #32 in FY2025; up 6 since FY2022.
43	Mantech International Corporation 2 awardees, including Mantech Advanced Systems International, Inc. and Mantech SRS Technologies, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$230,446,902	0.4%	Rank history: #45 in FY2021, #32 in FY2022, #55 in FY2024 and not on the FY2025 list; down 11 since FY2022.
44	Science Systems and Applications, Inc. Top agencies NASA (National Aeronautics and Space Administration)	$225,673,293	0.3%	Rank history: #36 in FY2021, #38 in FY2022, #48 in FY2024 and #56 in FY2025; down 6 since FY2022.
45	BAE Systems PLC 13 awardees, including BAE Systems Information & Electronic Systems Integration Inc. and BAE Systems Land & Armaments L.P. Top agencies DARPA (Defense Advanced Research Projects Agency) Army (Department of the Army) USAF (Department of the Air Force)	$225,533,050	0.3%	Rank history: #72 in FY2021, #64 in FY2022 and not on the FY2024–FY2025 lists; up 19 since FY2022.
46	Aaski Technology Inc. Through Mag DS Corp Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$222,642,743	0.3%	Rank history: #46 in FY2021, #30 in FY2022 and not on the FY2024–FY2025 lists; down 16 since FY2022.
47	Amgen Inc. 2 awardees, including Amgen USA Inc. Top agencies HHS (Department of Health and Human Services)	$204,858,576	0.3%	Rank history: not on the FY2021 list, #31 in FY2022 and not on the FY2024–FY2025 lists; down 16 since FY2022.
48	DCS Corporation 2 awardees Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$202,831,477	0.3%	Rank history: #42 in FY2021, #46 in FY2022, #57 in FY2024 and #63 in FY2025; down 2 since FY2022.
49	Oasis Systems, LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$194,055,983	0.3%	Rank history: #32 in FY2021, #27 in FY2022, #56 in FY2024 and #44 in FY2025; down 22 since FY2022.
50	Tecolote Research, Inc. Top agencies USAF (Department of the Air Force) DHS (Department of Homeland Security) Navy (Department of the Navy)	$192,015,511	0.3%	Rank history: #52 in FY2021, #50 in FY2022, #47 in FY2024 and #39 in FY2025; unchanged since FY2022.
51	Global Health Investment Corporation Top agencies HHS (Department of Health and Human Services)	$184,588,220	0.3%	Rank history: not on the FY2021 list, #91 in FY2022 and not on the FY2024–FY2025 lists; up 40 since FY2022.
52	General Electric Company 7 awardees, including Torch Research, LLC, GE Energy Power Conversion Naval Systems Inc. and GE Aviation Systems LLC Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration) DARPA (Defense Advanced Research Projects Agency)	$174,845,799	0.3%	Rank history: #61 in FY2021, #58 in FY2022, #54 in FY2024 and #57 in FY2025; up 6 since FY2022.
53	Carnegie-Mellon University 2 awardees Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$174,618,115	0.3%	Rank history: #47 in FY2021, #47 in FY2022, #46 in FY2024 and #54 in FY2025; down 6 since FY2022.
54	DMD Group Inc. Through Intrepid LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$174,509,592	0.3%	Rank history: #49 in FY2021, #43 in FY2022 and not on the FY2024–FY2025 lists; down 11 since FY2022.
55	Technology Service Corp 2 awardees, including Praxis, Inc. Top agencies USSOCOM (United States Special Operations Command) Navy (Department of the Navy) DHS (Department of Homeland Security)	$166,185,226	0.3%	Rank history: #95 in FY2021, #79 in FY2022, #62 in FY2024 and #61 in FY2025; up 24 since FY2022.
56	HP Enterprise Services LLC 8 awardees, including Peraton Technology Services Inc., Dhpc Technologies, Inc. and Peraton Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$156,402,430	0.2%	Rank history: #89 in FY2021, #49 in FY2022 and not on the FY2024–FY2025 lists; down 7 since FY2022.
57	Teledyne Technologies Incorporated 7 awardees, including Teledyne Brown Engineering, Inc., Teledyne Scientific & Imaging, LLC and Nova Research, Inc. Top agencies NASA (National Aeronautics and Space Administration) Army (Department of the Army) Navy (Department of the Navy)	$152,759,531	0.2%	Rank history: #58 in FY2021, #67 in FY2022, #44 in FY2024 and #48 in FY2025; up 10 since FY2022.
58	Utah State University 2 awardees, including Utah State University Space Dynamics Laboratory Top agencies USAF (Department of the Air Force) MDA (DOD Missile Defense Agency) Navy (Department of the Navy)	$152,119,520	0.2%	Rank history: #70 in FY2021, #65 in FY2022 and not on the FY2024–FY2025 lists; up 7 since FY2022.
59	PPD Development LP 2 awardees, including Fisher Scientific Company L.L.C. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$148,135,886	0.2%	Rank history: not on the FY2021–FY2022 lists, #53 in FY2024 and not on the FY2025 list; new.
60	Systems & Technology Research LLC Top agencies DARPA (Defense Advanced Research Projects Agency) Navy (Department of the Navy) USAF (Department of the Air Force)	$145,789,670	0.2%	Rank history: #56 in FY2021, #74 in FY2022, #76 in FY2024 and #86 in FY2025; up 14 since FY2022.
61	Safesource Direct LLC Top agencies HHS (Department of Health and Human Services)	$144,763,968	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
62	Intuitive Research and Technology Corporation Top agencies Army (Department of the Army) Navy (Department of the Navy)	$144,126,581	0.2%	Rank history: #67 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 185 since FY2022.
63	Qinetiq Group PLC 2 awardees, including Qinetiq Inc. Top agencies Army (Department of the Army) DOI (Department of the Interior)	$141,249,625	0.2%	Rank history: #51 in FY2021, #45 in FY2022 and not on the FY2024–FY2025 lists; down 18 since FY2022.
64	Frontier Technology Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) OSD (Office of the Secretary of Defense)	$140,468,133	0.2%	Rank history: #53 in FY2021, #59 in FY2022, #65 in FY2024 and #91 in FY2025; down 5 since FY2022.
65	Siga Technologies, Inc. Top agencies HHS (Department of Health and Human Services)	$138,169,505	0.2%	Rank history: #63 in FY2021, not on the FY2022 list, #69 in FY2024 and not on the FY2025 list; up 112 since FY2022.
66	Sri International Top agencies DARPA (Defense Advanced Research Projects Agency) HHS (Department of Health and Human Services) DLA (Defense Logistics Agency)	$137,724,804	0.2%	Rank history: #57 in FY2021, #55 in FY2022, #74 in FY2024 and #79 in FY2025; down 11 since FY2022.
67	Aerodyne-Sgt Engineering Services, LLC Top agencies NASA (National Aeronautics and Space Administration)	$136,296,185	0.2%	Rank history: not on the FY2021–FY2022 lists, #78 in FY2024 and #74 in FY2025; up 84 since FY2022.
68	Emergent Biosolutions Inc. 2 awardees, including Emergent Product Development Gaithersburg Inc. and Emergent Travel Health Inc. Top agencies HHS (Department of Health and Human Services)	$135,916,094	0.2%	Rank history: #24 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 143 since FY2022.
69	University of Texas System 11 awardees, including University of Texas At Austin, University of Texas At Dallas and The Univeristy of Texas M.d. Anderson Cancer Center Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$135,861,768	0.2%	Rank history: #60 in FY2021, #52 in FY2022, #89 in FY2024 and not on the FY2025 list; down 17 since FY2022.
70	Arctic Slope Regional Corporation 8 awardees, including AS and D, LLC, Asrc Federal System Solutions LLC and Analytical Services, Inc. Top agencies USAF (Department of the Air Force) MDA (DOD Missile Defense Agency) Commerce (Department of Commerce)	$130,551,745	0.2%	Rank history: #43 in FY2021, #39 in FY2022, #49 in FY2024 and #30 in FY2025; down 31 since FY2022.
71	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)	$126,209,836	0.2%	Rank history: #80 in FY2021, #82 in FY2022, #67 in FY2024 and #70 in FY2025; up 11 since FY2022.
72	Axient LLC 2 awardees Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration)	$124,956,908	0.2%	Rank history: #64 in FY2021, #53 in FY2022, #72 in FY2024 and #75 in FY2025; down 19 since FY2022.
73	Sev1Tech, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$121,424,604	0.2%	Rank history: #66 in FY2021, #72 in FY2022, not on the FY2024 list and #55 in FY2025; down 1 since FY2022.
74	Amentum Services, Inc. Top agencies Navy (Department of the Navy) OSD (Office of the Secretary of Defense) USAF (Department of the Air Force)	$120,702,066	0.2%	Rank history: #50 in FY2021, #40 in FY2022 and not on the FY2024–FY2025 lists; down 34 since FY2022.
75	University of Dayton Top agencies USAF (Department of the Air Force) Army (Department of the Army) OSD (Office of the Secretary of Defense)	$116,849,108	0.2%	Rank history: #79 in FY2021, #78 in FY2022, #59 in FY2024 and #42 in FY2025; up 3 since FY2022.
76	Sabin Albert B Vaccine Inst Through Albert B. Sabin Vaccine Institute, Inc. (The) Top agencies HHS (Department of Health and Human Services)	$116,551,404	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 142 since FY2022.
77	State of California Controllers Office 15 awardees, including The Regents of the University of California, University of California, San Diego and The Regents of the University of California. San Francisco Top agencies NASA (National Aeronautics and Space Administration) HHS (Department of Health and Human Services) DLA (Defense Logistics Agency)	$114,014,066	0.2%	Rank history: not on the FY2021 list, #56 in FY2022 and not on the FY2024–FY2025 lists; down 21 since FY2022.
78	American Electronic Warfare Associates, Incorporated Top agencies Navy (Department of the Navy)	$111,818,708	0.2%	Rank history: #86 in FY2021, #87 in FY2022 and not on the FY2024–FY2025 lists; up 9 since FY2022.
79	Innovative Defense Technologies, LLC Top agencies Navy (Department of the Navy) MDA (DOD Missile Defense Agency)	$107,879,200	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 35 since FY2022.
80	American Systems Corporation Top agencies OSD (Office of the Secretary of Defense) Navy (Department of the Navy) USAF (Department of the Air Force)	$105,794,967	0.2%	Rank history: not on the FY2021 list, #83 in FY2022, #60 in FY2024 and #67 in FY2025; up 3 since FY2022.
81	Colsa Corp Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration) Army (Department of the Army)	$105,142,998	0.2%	Rank history: #29 in FY2021, #51 in FY2022, #75 in FY2024 and #85 in FY2025; down 30 since FY2022.
82	American Type Culture Collection Top agencies HHS (Department of Health and Human Services)	$104,172,035	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 96 since FY2022.
83	Mercury Computer Systems Inc. 5 awardees, including Physical Optics Corporation, Mercury Systems Inc. and Mercury Mission Systems LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency)	$103,890,396	0.2%	Rank history: not on the FY2021 list, #88 in FY2022 and not on the FY2024–FY2025 lists; up 5 since FY2022.
84	Kratos Defense & Security Solutions, Inc. 9 awardees, including Kratos S2, Inc., Kratos Sre, Inc. and Kratos Defense & Rocket Support Services, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) MDA (DOD Missile Defense Agency)	$101,964,566	0.2%	Rank history: #84 in FY2021, #68 in FY2022 and not on the FY2024–FY2025 lists; down 16 since FY2022.
85	Fibertek, Inc. Top agencies Army (Department of the Army) NASA (National Aeronautics and Space Administration) Navy (Department of the Navy)	$100,835,881	0.2%	Rank history: #71 in FY2021, #70 in FY2022, #68 in FY2024 and #99 in FY2025; down 15 since FY2022.
86	Luminary Labs LLC Top agencies HHS (Department of Health and Human Services)	$100,000,000	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
87	Assurance Technology Corp Top agencies Navy (Department of the Navy)	$97,151,143	0.2%	Rank history: #100 in FY2021, #86 in FY2022, #100 in FY2024 and #53 in FY2025; down 1 since FY2022.
88	Mitchell Vantage Systems LLC Top agencies NASA (National Aeronautics and Space Administration)	$94,734,629	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 322 since FY2022.
89	QED Systems LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$93,694,569	0.1%	Rank history: not on the FY2021–FY2022 lists, #88 in FY2024 and #47 in FY2025; new.
90	RHO Inc. Through Rho Federal Systems Division Inc. Top agencies HHS (Department of Health and Human Services)	$91,399,288	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 161 since FY2022.
91	CQ JV, LLC Top agencies USAF (Department of the Air Force)	$89,093,345	0.1%	Rank history: not on the FY2021 list, #96 in FY2022, #81 in FY2024 and #66 in FY2025; up 5 since FY2022.
92	Astrion Group, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$86,666,058	0.1%	Rank history: #68 in FY2021, #66 in FY2022 and not on the FY2024–FY2025 lists; down 26 since FY2022.
93	Bluehalo, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$86,211,432	0.1%	Rank history: #78 in FY2021, #80 in FY2022, #84 in FY2024 and not on the FY2025 list; down 13 since FY2022.
94	Assured Information Security, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency)	$85,230,349	0.1%	Rank history: #54 in FY2021, #81 in FY2022, #95 in FY2024 and not on the FY2025 list; down 13 since FY2022.
95	Ball Corp 2 awardees, including BAE Systems Space & Mission Systems Inc. and Ball Aerospace & Technologies Corp. Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration) Navy (Department of the Navy)	$84,162,008	0.1%	Rank history: #75 in FY2021, #93 in FY2022 and not on the FY2024–FY2025 lists; down 2 since FY2022.
96	University of Washington 4 awardees, including University of Washington Department of Radiology Top agencies Navy (Department of the Navy) HHS (Department of Health and Human Services) DARPA (Defense Advanced Research Projects Agency)	$80,834,832	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 13 since FY2022.
97	Duke University 2 awardees Top agencies HHS (Department of Health and Human Services) DHS (Department of Homeland Security) Army (Department of the Army)	$78,781,948	0.1%	Rank history: #99 in FY2021, #94 in FY2022 and not on the FY2024–FY2025 lists; down 3 since FY2022.
98	The Emmes Company, LLC Top agencies HHS (Department of Health and Human Services)	$76,891,612	0.1%	Rank history: #87 in FY2021, #95 in FY2022, #97 in FY2024 and not on the FY2025 list; down 3 since FY2022.
99	Sigmatech Inc. 2 awardees Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$73,781,491	0.1%	Rank history: not on the FY2021–FY2022 lists, #66 in FY2024 and #60 in FY2025; up 34 since FY2022.
100	Trustees of Boston University 3 awardees Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$73,594,169	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 49 since FY2022.

Rankings for the codes under NAICS 54171

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 $64.7 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 2023 ran Oct 1, 2022 – Sep 30, 2023. 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 FY2022. "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 FY2022 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.

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