Top 100 Contractors in NAICS 54171: Research and Development in the Physical, Engineering, and Life Sciences, FY2024

Name: Top 100 Contractors in NAICS 54171: Research and Development in the Physical, Engineering, and Life Sciences, FY2024
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2023 – Sep 30, 2024 Code page on GovTribe

The top 10 won 35% of FY2024 NAICS 54171 contract dollars

Contract obligations: $59,332,027,663 Net of deobligations, by contracts coded NAICS 54171 or a code under it
Contractors: 4,688 Parent companies with an obligation
Largest contractor: Lockheed Martin Corporation $4.99 billion, 8.2% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Lockheed Martin Corporation 32 awardees Top agencies MDA (DOD Missile Defense Agency) Navy (Department of the Navy) USAF (Department of the Air Force)	$4,992,239,920	8.2%	Rank history: #1 in FY2021, #1 in FY2022, #1 in FY2023 and #1 in FY2025; unchanged since FY2023.
2	Fluor Corporation Through Fluor Marine Propulsion, LLC Top agencies DOE (Department of Energy) Navy (Department of the Navy)	$3,467,756,217	5.7%	Rank history: #2 in FY2021, #2 in FY2022, #2 in FY2023 and #2 in FY2025; unchanged since FY2023.
3	Northrop Grumman Corporation 35 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)	$2,343,583,638	3.8%	Rank history: #6 in FY2021, #5 in FY2022, #4 in FY2023 and #5 in FY2025; up 1 since FY2023.
4	California Institute of Technology 3 awardees Top agencies NASA (National Aeronautics and Space Administration) Navy (Department of the Navy) Commerce (Department of Commerce)	$2,228,220,453	3.6%	Rank history: #3 in FY2021, #3 in FY2022, #3 in FY2023 and #3 in FY2025; down 1 since FY2023.
5	Leidos Holdings, Inc. 12 awardees, including Leidos Biomedical Research Inc., Leidos, Inc. and Aranea Solutions Inc. Top agencies HHS (Department of Health and Human Services) Army (Department of the Army) USAF (Department of the Air Force)	$1,694,583,717	2.8%	Rank history: #4 in FY2021, #4 in FY2022, #5 in FY2023 and #7 in FY2025; unchanged since FY2023.
6	Massachusetts Institute of Technology 3 awardees Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DARPA (Defense Advanced Research Projects Agency)	$1,464,724,688	2.4%	Rank history: #9 in FY2021, #9 in FY2022, #9 in FY2023 and #8 in FY2025; up 3 since FY2023.
7	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)	$1,374,555,183	2.2%	Rank history: #88 in FY2021, not on the FY2022–FY2023 lists and not on the FY2025 list; returned.
8	The Aerospace Corporation Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration) DOE (Department of Energy)	$1,334,331,510	2.2%	Rank history: #10 in FY2021, #8 in FY2022, #11 in FY2023 and #9 in FY2025; up 3 since FY2023.
9	Booz Allen Hamilton Holding Corporation 4 awardees, including Booz Allen Hamilton Inc. and Everwatch Solutions Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$1,263,627,299	2.1%	Rank history: #14 in FY2021, #12 in FY2022, #13 in FY2023 and #10 in FY2025; up 4 since FY2023.
10	Alliance for Energy Innovation, LLC Top agencies DOE (Department of Energy) USAID (US Agency for International Development) WHS (DOD Washington Headquarters Service)	$1,167,681,745	1.9%	Rank history: #18 in FY2021, #17 in FY2022, #10 in FY2023 and #15 in FY2025; unchanged since FY2023.
11	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)	$1,118,167,386	1.8%	Rank history: not on the FY2021–FY2022 lists, #6 in FY2023 and not on the FY2025 list; down 5 since FY2023.
12	Science Applications International Corporation 5 awardees Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$1,063,976,759	1.7%	Rank history: #13 in FY2021, #10 in FY2022, #12 in FY2023 and #16 in FY2025; unchanged since FY2023.
13	The Mitre Corporation 2 awardees Top agencies DHS (Department of Homeland Security) OSD (Office of the Secretary of Defense) AAFES (Department of Defense Army and Air Force Exchange Service)	$1,056,812,850	1.7%	Rank history: #7 in FY2021, #6 in FY2022, #8 in FY2023 and #13 in FY2025; down 5 since FY2023.
14	Brookhaven Science Associates LLC Top agencies DOE (Department of Energy)	$797,151,609	1.3%	Rank history: #17 in FY2021, #13 in FY2022, #17 in FY2023 and #17 in FY2025; up 3 since FY2023.
15	Advanced Technology International Top agencies HHS (Department of Health and Human Services) Navy (Department of the Navy) DLA (Defense Logistics Agency)	$730,110,676	1.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
16	CACI International Inc. 9 awardees, including Caci Technologies, LLC, Caci, Inc. - Federal and LGS Innovations LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$725,458,064	1.2%	Rank history: #25 in FY2021, #23 in FY2022, #20 in FY2023 and #11 in FY2025; up 4 since FY2023.
17	L3Harris Technologies, Inc. 26 awardees, including Aerojet Rocketdyne of DE, Inc., L3 Technologies, Inc. and L3Harris Technologies Integrated Systems L.P. Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force) Navy (Department of the Navy)	$690,908,987	1.1%	Rank history: #26 in FY2021, #29 in FY2022, #35 in FY2023 and #19 in FY2025; up 18 since FY2023.
18	Huntington Ingalls Industries, Inc. 7 awardees, including HII Mission Technologies Corp and Enlighten It Consulting LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$687,732,089	1.1%	Rank history: not on the FY2021 list, #21 in FY2022, not on the FY2023 list and #24 in FY2025; returned.
19	The Boeing Company 32 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)	$660,119,146	1.1%	Rank history: #5 in FY2021, #16 in FY2022, #23 in FY2023 and #27 in FY2025; up 4 since FY2023.
20	Space Exploration Technologies Corp. Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force)	$647,767,236	1.1%	Rank history: #22 in FY2021, #14 in FY2022, #15 in FY2023 and #38 in FY2025; down 5 since FY2023.
21	KBR Wyle Services LLC 6 awardees Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$629,983,657	1.0%	Rank history: not on the FY2021–FY2023 lists and #12 in FY2025; new.
22	RTX Corporation 26 awardees, including Raytheon Company, RTX BBN Technologies, Inc. and Hamilton Sundstrand Corporation Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DARPA (Defense Advanced Research Projects Agency)	$562,015,323	0.9%	Rank history: #8 in FY2021, #15 in FY2022, #14 in FY2023 and #21 in FY2025; down 8 since FY2023.
23	Torch Technologies Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$532,960,119	0.9%	Rank history: #27 in FY2021, #22 in FY2022, #26 in FY2023 and #25 in FY2025; up 3 since FY2023.
24	Blue Origin Washington, LLC Top agencies NASA (National Aeronautics and Space Administration)	$484,344,302	0.8%	Rank history: not on the FY2021–FY2022 lists, #27 in FY2023 and #18 in FY2025; up 3 since FY2023.
25	Mantech Tsg-2 Joint Venture Top agencies Navy (Department of the Navy) OSD (Office of the Secretary of Defense) Army (Department of the Army)	$478,116,931	0.8%	Rank history: #31 in FY2021, #35 in FY2022, #40 in FY2023 and #31 in FY2025; up 15 since FY2023.
26	Parsons Corporation 7 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)	$465,839,674	0.8%	Rank history: #19 in FY2021, #19 in FY2022, #25 in FY2023 and #20 in FY2025; down 1 since FY2023.
27	Georgia TECH Applied Research Corp Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$453,577,711	0.7%	Rank history: not on the FY2021–FY2023 lists and #26 in FY2025; new.
28	General Dynamics Corporation 18 awardees, including General Dynamics Mission Systems, Inc., Applied Physical Sciences Corp and General Dynamics Global Force, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$393,471,175	0.6%	Rank history: #30 in FY2021, #26 in FY2022, #24 in FY2023 and #22 in FY2025; down 4 since FY2023.
29	Odyssey Systems Consulting Group Ltd. 2 awardees Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency) Navy (Department of the Navy)	$389,805,151	0.6%	Rank history: #76 in FY2021, #71 in FY2022, #39 in FY2023 and #29 in FY2025; up 10 since FY2023.
30	Battelle Memorial Institute 5 awardees, including Battelle Savannah River Alliance, LLC and Battelle National Biodefense Institute, LLC Top agencies DOE (Department of Energy) Army (Department of the Army) OSD (Office of the Secretary of Defense)	$368,225,305	0.6%	Rank history: #28 in FY2021, #25 in FY2022, #22 in FY2023 and #36 in FY2025; down 8 since FY2023.
31	The Pennsylvania State University Top agencies Navy (Department of the Navy) OSD (Office of the Secretary of Defense) DTRA (Defense Threat Reduction Agency)	$324,705,857	0.5%	Rank history: #40 in FY2021, #33 in FY2022, #34 in FY2023 and #33 in FY2025; up 3 since FY2023.
32	The Johns Hopkins University 2 awardees, including The Johns Hopkins University Applied Physics Laboratory LLC Top agencies NASA (National Aeronautics and Space Administration) Navy (Department of the Navy) MDA (DOD Missile Defense Agency)	$295,110,062	0.5%	Rank history: #11 in FY2021, #7 in FY2022, #7 in FY2023 and not on the FY2025 list; down 25 since FY2023.
33	Jacobs Government Services Company 6 awardees, including Amentum Technology, Inc., The Keyw Corporation and Jacobs Engineering Group Inc. Top agencies NASA (National Aeronautics and Space Administration) Navy (Department of the Navy) Army (Department of the Army)	$288,513,121	0.5%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
34	Battelle Savannah River Alliance, LLC Top agencies DOE (Department of Energy)	$278,585,044	0.5%	Rank history: #44 in FY2021, not on the FY2022–FY2023 lists and #34 in FY2025; returned.
35	Linquest Corporation 2 awardees Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$274,420,117	0.4%	Rank history: #41 in FY2021, #42 in FY2022, #37 in FY2023 and #35 in FY2025; up 2 since FY2023.
36	Applied Research Associates, Inc. 2 awardees Top agencies DTRA (Defense Threat Reduction Agency) USAF (Department of the Air Force) Army (Department of the Army)	$273,685,291	0.4%	Rank history: #37 in FY2021, #36 in FY2022, #36 in FY2023 and #40 in FY2025; unchanged since FY2023.
37	Caci Technologies LLC 4 awardees, including Caci, Inc. - Federal, LGS Innovations LLC and Caci LGS Innovations LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$268,093,474	0.4%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
38	Mag DS Corp Top agencies Army (Department of the Army) DISA (Defense Information Systems Agency)	$234,924,333	0.4%	Rank history: not on the FY2021–FY2023 lists and #43 in FY2025; new.
39	Kbr, Inc. 8 awardees, including KBR Wyle Services, LLC Top agencies Army (Department of the Army) NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force)	$229,049,462	0.4%	Rank history: #15 in FY2021, #18 in FY2022, #16 in FY2023 and not on the FY2025 list; down 23 since FY2023.
40	Jacobs Engineering Group Inc. 9 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)	$221,013,633	0.4%	Rank history: #12 in FY2021, #11 in FY2022, #19 in FY2023 and not on the FY2025 list; down 21 since FY2023.
41	General Dynamics Global Force, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$217,722,479	0.4%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
42	Intrepid LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$216,104,412	0.4%	Rank history: not on the FY2021–FY2023 lists and #41 in FY2025; new.
43	Modern Technology Solutions, Inc. Top agencies USAF (Department of the Air Force) OSD (Office of the Secretary of Defense) Army (Department of the Army)	$204,679,949	0.3%	Rank history: #62 in FY2021, #48 in FY2022, #42 in FY2023 and #32 in FY2025; down 1 since FY2023.
44	Teledyne Technologies Incorporated 8 awardees, including Teledyne Brown Engineering, Inc., Teledyne Scientific & Imaging, LLC and Teledyne Flir Defense, LLC Top agencies NASA (National Aeronautics and Space Administration) Army (Department of the Army) Navy (Department of the Navy)	$201,277,320	0.3%	Rank history: #58 in FY2021, #67 in FY2022, #57 in FY2023 and #48 in FY2025; up 13 since FY2023.
45	Applied Research Solutions, Inc. Top agencies USAF (Department of the Air Force)	$198,093,771	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
46	Carnegie Mellon University 3 awardees Top agencies USAF (Department of the Air Force) Army (Department of the Army) DTRA (Defense Threat Reduction Agency)	$191,358,455	0.3%	Rank history: #47 in FY2021, #47 in FY2022, #53 in FY2023 and #54 in FY2025; up 7 since FY2023.
47	Tecolote Research, Inc. Top agencies USAF (Department of the Air Force) DHS (Department of Homeland Security) Navy (Department of the Navy)	$190,187,294	0.3%	Rank history: #52 in FY2021, #50 in FY2022, #50 in FY2023 and #39 in FY2025; up 3 since FY2023.
48	Science Systems and Applications, Inc. Top agencies NASA (National Aeronautics and Space Administration)	$189,724,627	0.3%	Rank history: #36 in FY2021, #38 in FY2022, #44 in FY2023 and #56 in FY2025; down 4 since FY2023.
49	Arctic Slope Regional Corporation 9 awardees, including Asrc Federal System Solutions LLC, Data Networks, Inc. and Analytical Services, Inc. Top agencies USAF (Department of the Air Force) Commerce (Department of Commerce) MDA (DOD Missile Defense Agency)	$155,676,860	0.3%	Rank history: #43 in FY2021, #39 in FY2022, #70 in FY2023 and #30 in FY2025; up 21 since FY2023.
50	Radiance Technologies, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) WHS (DOD Washington Headquarters Service)	$154,594,626	0.3%	Rank history: not on the FY2021–FY2023 lists and #45 in FY2025; new.
51	Amentum Technology, Inc. Top agencies MDA (DOD Missile Defense Agency)	$150,259,559	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
52	Emergent Biosolutions Inc. Through Emergent Product Development Gaithersburg Inc. Top agencies HHS (Department of Health and Human Services)	$145,628,762	0.2%	Rank history: not on the FY2021–FY2023 lists and #71 in FY2025; new.
53	PPD Development LP 4 awardees, including Life Technologies Corporation and Fisher Scientific Company L.L.C. Top agencies HHS (Department of Health and Human Services) USDA (Department of Agriculture)	$144,320,753	0.2%	Rank history: not on the FY2021–FY2022 lists, #59 in FY2023 and not on the FY2025 list; up 6 since FY2023.
54	General Electric Company 6 awardees, including GE Energy Power Conversion Naval Systems Inc. and Torch Research, LLC Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force) Navy (Department of the Navy)	$137,283,016	0.2%	Rank history: #61 in FY2021, #58 in FY2022, #52 in FY2023 and #57 in FY2025; down 2 since FY2023.
55	Mantech International Corporation 2 awardees, including Mantech Advanced Systems International, Inc. and Mantech SRS Technologies, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$137,058,819	0.2%	Rank history: #45 in FY2021, #32 in FY2022, #43 in FY2023 and not on the FY2025 list; down 12 since FY2023.
56	Oasis Systems, LLC Top agencies USAF (Department of the Air Force)	$136,630,433	0.2%	Rank history: #32 in FY2021, #27 in FY2022, #49 in FY2023 and #44 in FY2025; down 7 since FY2023.
57	DCS Corporation 2 awardees Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$135,302,197	0.2%	Rank history: #42 in FY2021, #46 in FY2022, #48 in FY2023 and #63 in FY2025; down 9 since FY2023.
58	Raytheon Company Top agencies USAF (Department of the Air Force)	$131,066,372	0.2%	Rank history: not on the FY2021–FY2023 lists and #78 in FY2025; new.
59	University of Dayton Top agencies USAF (Department of the Air Force) Army (Department of the Army) WHS (DOD Washington Headquarters Service)	$129,961,390	0.2%	Rank history: #79 in FY2021, #78 in FY2022, #75 in FY2023 and #42 in FY2025; up 16 since FY2023.
60	American Systems Corporation Top agencies OSD (Office of the Secretary of Defense) Navy (Department of the Navy) USAF (Department of the Air Force)	$129,864,278	0.2%	Rank history: not on the FY2021 list, #83 in FY2022, #80 in FY2023 and #67 in FY2025; up 20 since FY2023.
61	Amgen USA Inc Top agencies HHS (Department of Health and Human Services)	$129,850,668	0.2%	Rank history: not on the FY2021–FY2023 lists and #76 in FY2025; new.
62	Technology Service Corp 2 awardees Top agencies USSOCOM (United States Special Operations Command) Navy (Department of the Navy) USAF (Department of the Air Force)	$129,712,382	0.2%	Rank history: #95 in FY2021, #79 in FY2022, #55 in FY2023 and #61 in FY2025; down 7 since FY2023.
63	Space Network Solutions LLC Top agencies NASA (National Aeronautics and Space Administration)	$125,314,492	0.2%	Rank history: not on the FY2021–FY2023 lists and #82 in FY2025; up 202 since FY2023.
64	Amentum Services, Inc. 2 awardees, including Tate, Incorporated Top agencies Navy (Department of the Navy) OSD (Office of the Secretary of Defense) USAF (Department of the Air Force)	$124,308,329	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
65	Frontier Technology Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) OSD (Office of the Secretary of Defense)	$119,733,280	0.2%	Rank history: #53 in FY2021, #59 in FY2022, #64 in FY2023 and #91 in FY2025; down 1 since FY2023.
66	Sigmatech Inc. 2 awardees Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$117,571,955	0.2%	Rank history: not on the FY2021–FY2022 lists, #99 in FY2023 and #60 in FY2025; up 33 since FY2023.
67	Southwest Research Institute Top agencies USAF (Department of the Air Force) DTRA (Defense Threat Reduction Agency) Army (Department of the Army)	$117,423,957	0.2%	Rank history: #80 in FY2021, #82 in FY2022, #71 in FY2023 and #70 in FY2025; up 4 since FY2023.
68	Fibertek, Inc. Top agencies Army (Department of the Army) WHS (DOD Washington Headquarters Service) NASA (National Aeronautics and Space Administration)	$116,809,503	0.2%	Rank history: #71 in FY2021, #70 in FY2022, #85 in FY2023 and #99 in FY2025; up 17 since FY2023.
69	Siga Technologies, Inc. Top agencies HHS (Department of Health and Human Services)	$112,552,320	0.2%	Rank history: #63 in FY2021, not on the FY2022 list, #65 in FY2023 and not on the FY2025 list; down 4 since FY2023.
70	Palantir Technologies Inc. Through Palantir USG Inc. Top agencies OSD (Office of the Secretary of Defense) Army (Department of the Army)	$109,903,424	0.2%	Rank history: not on the FY2021–FY2023 lists and #37 in FY2025; new.
71	Prescient Edge Corporation Top agencies Navy (Department of the Navy)	$108,978,587	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 44 since FY2023.
72	Axient LLC Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration)	$107,886,985	0.2%	Rank history: #64 in FY2021, #53 in FY2022, #72 in FY2023 and #75 in FY2025; unchanged since FY2023.
73	Utah State University Space Dynamics Laboratory Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) MDA (DOD Missile Defense Agency)	$106,861,061	0.2%	Rank history: not on the FY2021–FY2023 lists and #59 in FY2025; new.
74	Sri International Top agencies DARPA (Defense Advanced Research Projects Agency) HHS (Department of Health and Human Services) DLA (Defense Logistics Agency)	$106,426,574	0.2%	Rank history: #57 in FY2021, #55 in FY2022, #66 in FY2023 and #79 in FY2025; down 8 since FY2023.
75	Colsa Corp Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$106,291,420	0.2%	Rank history: #29 in FY2021, #51 in FY2022, #81 in FY2023 and #85 in FY2025; up 6 since FY2023.
76	Systems & Technology Research LLC Top agencies DARPA (Defense Advanced Research Projects Agency) Navy (Department of the Navy) USAF (Department of the Air Force)	$106,082,468	0.2%	Rank history: #56 in FY2021, #74 in FY2022, #60 in FY2023 and #86 in FY2025; down 16 since FY2023.
77	Westat, Inc. Top agencies HHS (Department of Health and Human Services) DHA (Defense Health Agency) EPA (Environmental Protection Agency)	$103,225,333	0.2%	Rank history: #69 in FY2021, #73 in FY2022, not on the FY2023 list and #90 in FY2025; up 26 since FY2023.
78	Aerodyne-Sgt Engineering Services, LLC Top agencies NASA (National Aeronautics and Space Administration)	$101,244,456	0.2%	Rank history: not on the FY2021–FY2022 lists, #67 in FY2023 and #74 in FY2025; down 11 since FY2023.
79	Qinetiq Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) DHS (Department of Homeland Security)	$100,432,561	0.2%	Rank history: not on the FY2021–FY2023 lists and #65 in FY2025; new.
80	BAE Systems 10 awardees, including BAE Systems Information & Electronic Systems Integration Inc., BAE Systems Land & Armaments L.P. and BAE Systems Ordnance Systems Inc. Top agencies DARPA (Defense Advanced Research Projects Agency) Army (Department of the Army) Navy (Department of the Navy)	$98,641,406	0.2%	Rank history: not on the FY2021–FY2023 lists and #50 in FY2025; new.
81	CQ JV, LLC Top agencies USAF (Department of the Air Force)	$94,816,345	0.2%	Rank history: not on the FY2021 list, #96 in FY2022, #91 in FY2023 and #66 in FY2025; up 10 since FY2023.
82	Deloitte Through Deloitte Consulting LLP Top agencies WHS (DOD Washington Headquarters Service) DLA (Defense Logistics Agency) Navy (Department of the Navy)	$91,230,175	0.1%	Rank history: not on the FY2021–FY2023 lists and #46 in FY2025; new.
83	HX5 LLC Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration)	$89,797,282	0.1%	Rank history: #59 in FY2021, #60 in FY2022, not on the FY2023 list and #88 in FY2025; up 34 since FY2023.
84	Bluehalo, LLC Top agencies USAF (Department of the Air Force) OSD (Office of the Secretary of Defense) Army (Department of the Army)	$89,729,830	0.1%	Rank history: #78 in FY2021, #80 in FY2022, #93 in FY2023 and not on the FY2025 list; up 9 since FY2023.
85	American Electronic Warfare Associates Incorporated Top agencies Navy (Department of the Navy)	$88,230,496	0.1%	Rank history: not on the FY2021–FY2023 lists and #69 in FY2025; new.
86	Ascend Performance Materials Texas Inc. Top agencies HHS (Department of Health and Human Services)	$87,666,336	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
87	General Atomic Technologies Corporation 3 awardees, including General Atomics Aeronautical Systems, Inc. and General Atomics Top agencies DARPA (Defense Advanced Research Projects Agency) Navy (Department of the Navy) DOE (Department of Energy)	$87,048,220	0.1%	Rank history: #38 in FY2021, #63 in FY2022, #33 in FY2023 and not on the FY2025 list; down 54 since FY2023.
88	QED Systems LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$83,713,562	0.1%	Rank history: not on the FY2021–FY2022 lists, #89 in FY2023 and #47 in FY2025; up 1 since FY2023.
89	University of Texas System 8 awardees, including University of Texas At Austin, The University of Texas At San Antonio and University of Texas Medical Branch At Galveston Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency)	$82,981,347	0.1%	Rank history: #60 in FY2021, #52 in FY2022, #69 in FY2023 and not on the FY2025 list; down 20 since FY2023.
90	Parsons Government Services Inc. Top agencies MDA (DOD Missile Defense Agency) Army (Department of the Army) DOT (Department of Transportation)	$82,681,666	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
91	Innovative Defense Technologies LLC Top agencies Navy (Department of the Navy) Army (Department of the Army) MDA (DOD Missile Defense Agency)	$82,511,501	0.1%	Rank history: not on the FY2021–FY2023 lists and #77 in FY2025; new.
92	Barrios Technology, LLC Top agencies NASA (National Aeronautics and Space Administration)	$82,349,120	0.1%	Rank history: #91 in FY2021, #90 in FY2022, not on the FY2023 list and not on the FY2025 list; up 10 since FY2023.
93	General Atomics Aeronautical Systems, Inc. Top agencies DARPA (Defense Advanced Research Projects Agency) Navy (Department of the Navy) WHS (DOD Washington Headquarters Service)	$81,325,670	0.1%	Rank history: not on the FY2021–FY2023 lists and #62 in FY2025; new.
94	MP Solutions, LLC Top agencies MDA (DOD Missile Defense Agency)	$81,014,893	0.1%	Rank history: not on the FY2021–FY2023 lists and #100 in FY2025; up 17 since FY2023.
95	Assured Information Security, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$78,983,057	0.1%	Rank history: #54 in FY2021, #81 in FY2022, #94 in FY2023 and not on the FY2025 list; down 1 since FY2023.
96	Credence Management Solutions Limited Liability Company Top agencies USAF (Department of the Air Force)	$78,061,746	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
97	The Emmes Company, LLC Top agencies HHS (Department of Health and Human Services)	$77,865,328	0.1%	Rank history: #87 in FY2021, #95 in FY2022, #98 in FY2023 and not on the FY2025 list; up 1 since FY2023.
98	Mantech Advanced Systems International, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) DTRA (Defense Threat Reduction Agency)	$77,453,175	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
99	Intuitive Research and Technology Corporation Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$74,419,333	0.1%	Rank history: not on the FY2021–FY2023 lists and #28 in FY2025; new.
100	Assurance Technology Corp Top agencies Navy (Department of the Navy)	$73,582,529	0.1%	Rank history: #100 in FY2021, #86 in FY2022, #87 in FY2023 and #53 in FY2025; down 13 since FY2023.

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100 of 4,688 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 54171

Code	Net obligations	Largest contractor
541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$44,153,897,559	Lockheed Martin Corporation
541714 Research and Development in Biotechnology (except Nanobiotechnology)	$3,801,984,064	Analytic Services Inc.
541713 Research and Development in Nanotechnology	$205,016,796	The Emmes Company, LLC

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 $61.2 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 2024 ran Oct 1, 2023 – Sep 30, 2024. 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 FY2023. "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 FY2023 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 54171 contractors in FY2024?

1. Lockheed Martin Corporation ($4.99B), 2. Fluor Corporation ($3.47B), 3. Northrop Grumman Corporation ($2.34B), 4. California Institute of Technology ($2.23B), 5. Leidos Holdings, Inc. ($1.69B), 6. Massachusetts Institute of Technology ($1.46B), 7. The Johns Hopkins University Applied Physics Laboratory LLC ($1.37B), 8. The Aerospace Corporation ($1.33B), 9. Booz Allen Hamilton Holding Corporation ($1.26B), 10. Alliance for Energy Innovation, LLC ($1.17B).

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