Top 100 Contractors in NAICS 54171: Research and Development in the Physical, Engineering, and Life Sciences, Jul 2025–Jun 2026

Name: Top 100 Contractors in NAICS 54171: Research and Development in the Physical, Engineering, and Life Sciences, Jul 2025–Jun 2026
Creator: GovTribe

Parent companies by net contract obligations Jul 1, 2025 – Jun 30, 2026 Code page on GovTribe

The top 10 won 39% of NAICS 54171 contract dollars from July 2025 through June 2026

Contract obligations: $63,279,676,103 Net of deobligations, by contracts coded NAICS 54171 or a code under it
Contractors: 5,572 Parent companies with an obligation
Largest contractor: Lockheed Martin Corporation $7.27 billion, 11.0% of obligations
Data as of: Oct 16, 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 23 awardees, including Sikorsky Aircraft Corporation Top agencies MDA (DOD Missile Defense Agency) Navy (Department of the Navy) OSD (Office of the Secretary of Defense)	$7,272,355,956	11.0%	Rank history: #1 in FY2021, #1 in FY2022, #1 in FY2023, #1 in FY2024 and #1 in FY2025; unchanged since Jul 2024–Jun 2025.
2	Fluor Corporation 2 awardees, including Fluor Marine Propulsion, LLC and Fluor Intercontinental, Inc. Top agencies DOE (Department of Energy) Navy (Department of the Navy) MDA (DOD Missile Defense Agency)	$3,385,644,981	5.1%	Rank history: #2 in FY2021, #2 in FY2022, #2 in FY2023, #2 in FY2024 and #2 in FY2025; unchanged since Jul 2024–Jun 2025.
3	RTX Corporation 43 awardees, including Raytheon Company, RTX BBN Technologies, Inc. and Range Generation Next LLC Top agencies OSD (Office of the Secretary of Defense) USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$2,474,538,134	3.8%	Rank history: #8 in FY2021, #15 in FY2022, #14 in FY2023, #22 in FY2024 and #21 in FY2025; up 20 since Jul 2024–Jun 2025.
4	California Institute of Technology 2 awardees Top agencies NASA (National Aeronautics and Space Administration) DARPA (Defense Advanced Research Projects Agency) Navy (Department of the Navy)	$2,294,956,063	3.5%	Rank history: #3 in FY2021, #3 in FY2022, #3 in FY2023, #4 in FY2024 and #3 in FY2025; down 1 since Jul 2024–Jun 2025.
5	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)	$2,063,398,931	3.1%	Rank history: not on the FY2021–FY2024 lists and #4 in FY2025; up 392 since Jul 2024–Jun 2025.
6	Northrop Grumman Systems Corporation 33 awardees, including Scaled Composites, LLC Top agencies MDA (DOD Missile Defense Agency) USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration)	$1,850,494,219	2.8%	Rank history: #6 in FY2021, #5 in FY2022, #4 in FY2023, #3 in FY2024 and #5 in FY2025; down 1 since Jul 2024–Jun 2025.
7	Leidos Holdings, Inc. 10 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)	$1,714,001,373	2.6%	Rank history: #4 in FY2021, #4 in FY2022, #5 in FY2023, #5 in FY2024 and #7 in FY2025; down 1 since Jul 2024–Jun 2025.
8	Massachusetts Institute of Technology 3 awardees Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) WHS (DOD Washington Headquarters Service)	$1,619,773,664	2.5%	Rank history: #9 in FY2021, #9 in FY2022, #9 in FY2023, #6 in FY2024 and #8 in FY2025; up 1 since Jul 2024–Jun 2025.
9	The Mitre Corporation Top agencies USAF (Department of the Air Force) OSD (Office of the Secretary of Defense) Navy (Department of the Navy)	$1,530,799,905	2.3%	Rank history: #7 in FY2021, #6 in FY2022, #8 in FY2023, #13 in FY2024 and #13 in FY2025; up 3 since Jul 2024–Jun 2025.
10	The Aerospace Corporation Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration) DOE (Department of Energy)	$1,409,591,367	2.1%	Rank history: #10 in FY2021, #8 in FY2022, #11 in FY2023, #8 in FY2024 and #9 in FY2025; unchanged since Jul 2024–Jun 2025.
11	Booz Allen Hamilton Holding Corporation 3 awardees, including Booz Allen Hamilton Inc., Everwatch Solutions Inc. and Ultra Electronics Advanced Tactical Systems Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$1,237,387,621	1.9%	Rank history: #14 in FY2021, #12 in FY2022, #13 in FY2023, #9 in FY2024 and #10 in FY2025; down 3 since Jul 2024–Jun 2025.
12	CACI International Inc. 5 awardees, including Caci Technologies, LLC, Caci, Inc. - Federal and Caci LGS Innovations LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$1,108,854,119	1.7%	Rank history: #25 in FY2021, #23 in FY2022, #20 in FY2023, #16 in FY2024 and #11 in FY2025; up 1 since Jul 2024–Jun 2025.
13	Fermi Forward Discovery Group, LLC Top agencies DOE (Department of Energy)	$1,024,124,489	1.6%	Rank history: not on the FY2021–FY2024 lists and #6 in FY2025; down 6 since Jul 2024–Jun 2025.
14	Brookhaven Science Associates LLC Top agencies DOE (Department of Energy) NASA (National Aeronautics and Space Administration)	$966,015,065	1.5%	Rank history: #17 in FY2021, #13 in FY2022, #17 in FY2023, #14 in FY2024 and #17 in FY2025; up 3 since Jul 2024–Jun 2025.
15	Amentum Holdings, Inc. 9 awardees, including Amentum Technology, Inc., Amentum Services, Inc. and Tate, Incorporated Top agencies MDA (DOD Missile Defense Agency) NASA (National Aeronautics and Space Administration) Navy (Department of the Navy)	$925,474,622	1.4%	Rank history: not on the FY2021–FY2024 lists and #14 in FY2025; up 5 since Jul 2024–Jun 2025.
16	L3Harris Technologies, Inc. 33 awardees, including Aerojet Rocketdyne of DE, Inc., L3 Technologies, Inc. and L3Harris Forcex, Inc. Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force) Navy (Department of the Navy)	$783,631,253	1.2%	Rank history: #26 in FY2021, #29 in FY2022, #35 in FY2023, #17 in FY2024 and #19 in FY2025; down 1 since Jul 2024–Jun 2025.
17	KBR Wyle Services LLC 5 awardees Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force) Navy (Department of the Navy)	$744,859,262	1.1%	Rank history: not on the FY2021–FY2023 lists, #21 in FY2024 and #12 in FY2025; down 1 since Jul 2024–Jun 2025.
18	Science Applications International Corporation Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$734,623,933	1.1%	Rank history: #13 in FY2021, #10 in FY2022, #12 in FY2023, #12 in FY2024 and #16 in FY2025; down 4 since Jul 2024–Jun 2025.
19	Georgia TECH Applied Research Corp 3 awardees, including Georgia TECH Research Corp Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$655,357,588	1.0%	Rank history: not on the FY2021–FY2023 lists, #27 in FY2024 and #26 in FY2025; up 9 since Jul 2024–Jun 2025.
20	General Dynamics Corporation 20 awardees, including General Dynamics Mission Systems, Inc., General Dynamics Global Force, LLC and Applied Physical Sciences Corp Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$652,706,249	1.0%	Rank history: #30 in FY2021, #26 in FY2022, #24 in FY2023, #28 in FY2024 and #22 in FY2025; up 4 since Jul 2024–Jun 2025.
21	Torch Technologies Inc. 2 awardees, including Nlogic, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$647,680,567	1.0%	Rank history: #27 in FY2021, #22 in FY2022, #26 in FY2023, #23 in FY2024 and #25 in FY2025; up 1 since Jul 2024–Jun 2025.
22	Alliance for Energy Innovation, LLC Top agencies DOE (Department of Energy) OSD (Office of the Secretary of Defense) WHS (DOD Washington Headquarters Service)	$635,106,872	1.0%	Rank history: #18 in FY2021, #17 in FY2022, #10 in FY2023, #10 in FY2024 and #15 in FY2025; down 11 since Jul 2024–Jun 2025.
23	Odyssey Systems Consulting Group, Ltd. Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency) Navy (Department of the Navy)	$627,378,218	1.0%	Rank history: #76 in FY2021, #71 in FY2022, #39 in FY2023, #29 in FY2024 and #29 in FY2025; up 14 since Jul 2024–Jun 2025.
24	Parsons Corporation 6 awardees, including Parsons Government Services Inc., Altamira Technologies Corp and Space Ground System Solutions, Inc. Top agencies USAF (Department of the Air Force) MDA (DOD Missile Defense Agency) Army (Department of the Army)	$624,598,004	0.9%	Rank history: #19 in FY2021, #19 in FY2022, #25 in FY2023, #26 in FY2024 and #20 in FY2025; down 6 since Jul 2024–Jun 2025.
25	Blue Origin Washington, LLC Top agencies NASA (National Aeronautics and Space Administration)	$580,545,148	0.9%	Rank history: not on the FY2021–FY2022 lists, #27 in FY2023, #24 in FY2024 and #18 in FY2025; unchanged since Jul 2024–Jun 2025.
26	Intuitive Research and Technology Corporation Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$556,017,787	0.8%	Rank history: not on the FY2021–FY2023 lists, #99 in FY2024 and #28 in FY2025; up 22 since Jul 2024–Jun 2025.
27	The Pennsylvania State University Top agencies Navy (Department of the Navy) OSD (Office of the Secretary of Defense) USAF (Department of the Air Force)	$550,466,620	0.8%	Rank history: #40 in FY2021, #33 in FY2022, #34 in FY2023, #31 in FY2024 and #33 in FY2025; up 4 since Jul 2024–Jun 2025.
28	Huntington Ingalls Industries, Inc. 3 awardees, including HII Mission Technologies Corp Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) OSD (Office of the Secretary of Defense)	$490,648,705	0.7%	Rank history: not on the FY2021 list, #21 in FY2022, not on the FY2023 list, #18 in FY2024 and #24 in FY2025; down 9 since Jul 2024–Jun 2025.
29	The Boeing Company 20 awardees, including HRL Laboratories, LLC Top agencies MDA (DOD Missile Defense Agency) USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency)	$482,240,623	0.7%	Rank history: #5 in FY2021, #16 in FY2022, #23 in FY2023, #19 in FY2024 and #27 in FY2025; down 3 since Jul 2024–Jun 2025.
30	Modern Technology Solutions, Inc. Top agencies USAF (Department of the Air Force) OSD (Office of the Secretary of Defense) Army (Department of the Army)	$464,510,029	0.7%	Rank history: #62 in FY2021, #48 in FY2022, #42 in FY2023, #43 in FY2024 and #32 in FY2025; unchanged since Jul 2024–Jun 2025.
31	Aevex Aerospace, LLC Top agencies USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$427,766,971	0.6%	Rank history: not on the FY2021–FY2024 lists and #23 in FY2025; up 3 since Jul 2024–Jun 2025.
32	Arctic Slope Regional Corporation 10 awardees, including Applied Research Solutions, Inc., Asrc Federal System Solutions LLC and Data Networks, Inc. Top agencies USAF (Department of the Air Force) Commerce (Department of Commerce) DHRA (Defense Human Resources Activity)	$413,204,935	0.6%	Rank history: #43 in FY2021, #39 in FY2022, #70 in FY2023, #49 in FY2024 and #30 in FY2025; up 18 since Jul 2024–Jun 2025.
33	Mantech Tsg-2 Joint Venture Top agencies Navy (Department of the Navy) OSD (Office of the Secretary of Defense)	$386,348,840	0.6%	Rank history: #31 in FY2021, #35 in FY2022, #40 in FY2023, #25 in FY2024 and #31 in FY2025; down 6 since Jul 2024–Jun 2025.
34	Linquest Corporation Top agencies USAF (Department of the Air Force)	$348,891,560	0.5%	Rank history: #41 in FY2021, #42 in FY2022, #37 in FY2023, #35 in FY2024 and #35 in FY2025; down 1 since Jul 2024–Jun 2025.
35	Blue Origin Manufacturing, LLC Top agencies NASA (National Aeronautics and Space Administration)	$301,561,071	0.5%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
36	Suratech LLC Top agencies DOE (Department of Energy)	$289,988,170	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
37	Battelle Memorial Institute 2 awardees Top agencies HHS (Department of Health and Human Services) USAF (Department of the Air Force) Army (Department of the Army)	$283,750,718	0.4%	Rank history: #28 in FY2021, #25 in FY2022, #22 in FY2023, #30 in FY2024 and #36 in FY2025; down 1 since Jul 2024–Jun 2025.
38	Battelle Savannah River Alliance, LLC Top agencies DOE (Department of Energy)	$278,394,676	0.4%	Rank history: #44 in FY2021, not on the FY2022–FY2023 lists, #34 in FY2024 and #34 in FY2025; down 9 since Jul 2024–Jun 2025.
39	Kbr, Inc. 3 awardees, including KBR Wyle Services, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) NASA (National Aeronautics and Space Administration)	$264,306,807	0.4%	Rank history: #15 in FY2021, #18 in FY2022, #16 in FY2023, #39 in FY2024 and not on the FY2025 list; new, not ranked in Jul 2024–Jun 2025.
40	Albert B. Sabin Vaccine Institute, Inc. (The) Top agencies HHS (Department of Health and Human Services)	$264,050,109	0.4%	Rank history: not on the FY2021–FY2024 lists and #95 in FY2025; up 86 since Jul 2024–Jun 2025.
41	Applied Research Associates, Inc. 3 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)	$259,682,042	0.4%	Rank history: #37 in FY2021, #36 in FY2022, #36 in FY2023, #36 in FY2024 and #40 in FY2025; up 1 since Jul 2024–Jun 2025.
42	University of Dayton Top agencies USAF (Department of the Air Force) WHS (DOD Washington Headquarters Service) OSD (Office of the Secretary of Defense)	$248,042,765	0.4%	Rank history: #79 in FY2021, #78 in FY2022, #75 in FY2023, #59 in FY2024 and #42 in FY2025; up 2 since Jul 2024–Jun 2025.
43	Space Exploration Technologies Corp. 2 awardees Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$239,497,756	0.4%	Rank history: #22 in FY2021, #14 in FY2022, #15 in FY2023, #20 in FY2024 and #38 in FY2025; down 22 since Jul 2024–Jun 2025.
44	Tecolote Research, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DHS (Department of Homeland Security)	$231,605,572	0.4%	Rank history: #52 in FY2021, #50 in FY2022, #50 in FY2023, #47 in FY2024 and #39 in FY2025; down 1 since Jul 2024–Jun 2025.
45	Mag DS Corp Top agencies Army (Department of the Army) USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$226,975,368	0.3%	Rank history: not on the FY2021–FY2023 lists, #38 in FY2024 and #43 in FY2025; down 10 since Jul 2024–Jun 2025.
46	Castelion Corporation Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$194,947,540	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
47	Radiance Technologies, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) WHS (DOD Washington Headquarters Service)	$193,228,136	0.3%	Rank history: not on the FY2021–FY2023 lists, #50 in FY2024 and #45 in FY2025; unchanged since Jul 2024–Jun 2025.
48	BAE Systems 12 awardees, including BAE Systems Information & Electronic Systems Integration Inc., BAE Systems Space & Mission Systems Inc. and BAE Systems Land and Armaments L.P. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency)	$168,643,950	0.3%	Rank history: not on the FY2021–FY2023 lists, #80 in FY2024 and #50 in FY2025; up 7 since Jul 2024–Jun 2025.
49	Teledyne Flir Unmanned Ground Systems Inc 5 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)	$167,325,136	0.3%	Rank history: #58 in FY2021, #67 in FY2022, #57 in FY2023, #44 in FY2024 and #48 in FY2025; down 3 since Jul 2024–Jun 2025.
50	General Atomics Aeronautical Systems, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$166,763,760	0.3%	Rank history: not on the FY2021–FY2023 lists, #93 in FY2024 and #62 in FY2025; up 4 since Jul 2024–Jun 2025.
51	Aerovironment, Inc. 3 awardees, including Bluehalo LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$165,780,122	0.3%	Rank history: not on the FY2021–FY2024 lists and #51 in FY2025; up 366 since Jul 2024–Jun 2025.
52	QED Systems LLC Top agencies Army (Department of the Army) MDA (DOD Missile Defense Agency)	$160,327,918	0.2%	Rank history: not on the FY2021–FY2022 lists, #89 in FY2023, #88 in FY2024 and #47 in FY2025; up 6 since Jul 2024–Jun 2025.
53	Innovative Defense Technologies LLC Top agencies Navy (Department of the Navy) OSD (Office of the Secretary of Defense) MDA (DOD Missile Defense Agency)	$158,882,854	0.2%	Rank history: not on the FY2021–FY2023 lists, #91 in FY2024 and #77 in FY2025; up 11 since Jul 2024–Jun 2025.
54	Amgen USA Inc Top agencies HHS (Department of Health and Human Services)	$149,963,872	0.2%	Rank history: not on the FY2021–FY2023 lists, #61 in FY2024 and #76 in FY2025; up 7 since Jul 2024–Jun 2025.
55	X-Bow Launch Systems Inc. Top agencies USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$139,767,526	0.2%	Rank history: not on the FY2021–FY2024 lists and #49 in FY2025; up 203 since Jul 2024–Jun 2025.
56	P E Systems, Inc. Top agencies USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$134,955,874	0.2%	Rank history: #85 in FY2021, not on the FY2022–FY2024 lists and #58 in FY2025; up 31 since Jul 2024–Jun 2025.
57	Oasis Systems, LLC Top agencies USAF (Department of the Air Force)	$132,059,822	0.2%	Rank history: #32 in FY2021, #27 in FY2022, #49 in FY2023, #56 in FY2024 and #44 in FY2025; down 12 since Jul 2024–Jun 2025.
58	Utah State University Space Dynamics Laboratory Top agencies USAF (Department of the Air Force) MDA (DOD Missile Defense Agency) Navy (Department of the Navy)	$126,648,441	0.2%	Rank history: not on the FY2021–FY2023 lists, #73 in FY2024 and #59 in FY2025; down 2 since Jul 2024–Jun 2025.
59	Joint Technical Solutions, LLC Top agencies Army (Department of the Army)	$126,276,474	0.2%	Rank history: not on the FY2021–FY2024 lists and #64 in FY2025; up 10 since Jul 2024–Jun 2025.
60	Shionogi & Company Limited Through Shionogi Inc. Top agencies HHS (Department of Health and Human Services)	$119,160,688	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
61	Assurance Technology Corp Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$117,915,198	0.2%	Rank history: #100 in FY2021, #86 in FY2022, #87 in FY2023, #100 in FY2024 and #53 in FY2025; up 15 since Jul 2024–Jun 2025.
62	Technology Service Corp Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) MDA (DOD Missile Defense Agency)	$115,815,056	0.2%	Rank history: #95 in FY2021, #79 in FY2022, #55 in FY2023, #62 in FY2024 and #61 in FY2025; down 2 since Jul 2024–Jun 2025.
63	Southwest Research Institute Top agencies DTRA (Defense Threat Reduction Agency) DARPA (Defense Advanced Research Projects Agency) USAF (Department of the Air Force)	$112,555,494	0.2%	Rank history: #80 in FY2021, #82 in FY2022, #71 in FY2023, #67 in FY2024 and #70 in FY2025; up 8 since Jul 2024–Jun 2025.
64	Serco Inc 3 awardees, including Brtrc Federal Solutions, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$111,782,288	0.2%	Rank history: not on the FY2021–FY2024 lists and #73 in FY2025; up 269 since Jul 2024–Jun 2025.
65	Fibertek, Inc. Top agencies Army (Department of the Army) NASA (National Aeronautics and Space Administration) DARPA (Defense Advanced Research Projects Agency)	$111,127,140	0.2%	Rank history: #71 in FY2021, #70 in FY2022, #85 in FY2023, #68 in FY2024 and #99 in FY2025; up 9 since Jul 2024–Jun 2025.
66	American Electronic Warfare Associates Incorporated Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$107,943,012	0.2%	Rank history: not on the FY2021–FY2023 lists, #85 in FY2024 and #69 in FY2025; up 11 since Jul 2024–Jun 2025.
67	Start2 Group, Inc. Top agencies HHS (Department of Health and Human Services)	$106,908,704	0.2%	Rank history: not on the FY2021–FY2024 lists and #68 in FY2025; up 110 since Jul 2024–Jun 2025.
68	JJR Solutions LLC Top agencies Navy (Department of the Navy) Army (Department of the Army) DHS (Department of Homeland Security)	$104,438,383	0.2%	Rank history: not on the FY2021–FY2025 lists; up 18 since Jul 2024–Jun 2025.
69	DCS Corporation Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$102,816,977	0.2%	Rank history: #42 in FY2021, #46 in FY2022, #48 in FY2023, #57 in FY2024 and #63 in FY2025; up 1 since Jul 2024–Jun 2025.
70	CQ JV, LLC Top agencies USAF (Department of the Air Force)	$102,340,536	0.2%	Rank history: not on the FY2021 list, #96 in FY2022, #91 in FY2023, #81 in FY2024 and #66 in FY2025; up 2 since Jul 2024–Jun 2025.
71	Sigmatech Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$99,534,244	0.2%	Rank history: not on the FY2021–FY2022 lists, #99 in FY2023, #66 in FY2024 and #60 in FY2025; down 4 since Jul 2024–Jun 2025.
72	American Systems Corporation Top agencies OSD (Office of the Secretary of Defense) Navy (Department of the Navy) USAF (Department of the Air Force)	$99,329,071	0.2%	Rank history: not on the FY2021 list, #83 in FY2022, #80 in FY2023, #60 in FY2024 and #67 in FY2025; up 10 since Jul 2024–Jun 2025.
73	Systems & Technology Research LLC Top agencies DARPA (Defense Advanced Research Projects Agency) Navy (Department of the Navy) WHS (DOD Washington Headquarters Service)	$98,153,164	0.1%	Rank history: #56 in FY2021, #74 in FY2022, #60 in FY2023, #76 in FY2024 and #86 in FY2025; up 24 since Jul 2024–Jun 2025.
74	Peopletec, Inc. Top agencies Army (Department of the Army) MDA (DOD Missile Defense Agency) USSOCOM (United States Special Operations Command)	$90,920,995	0.1%	Rank history: not on the FY2021–FY2025 lists; up 268 since Jul 2024–Jun 2025.
75	MP Solutions, LLC Top agencies MDA (DOD Missile Defense Agency) OSD (Office of the Secretary of Defense) Navy (Department of the Navy)	$88,302,603	0.1%	Rank history: not on the FY2021–FY2023 lists, #94 in FY2024 and #100 in FY2025; up 37 since Jul 2024–Jun 2025.
76	Chickasaw Nation Through Corvid Technologies, LLC Top agencies MDA (DOD Missile Defense Agency) OSD (Office of the Secretary of Defense) Navy (Department of the Navy)	$88,013,962	0.1%	Rank history: not on the FY2021–FY2024 lists and #96 in FY2025; up 48 since Jul 2024–Jun 2025.
77	Sev1Tech, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) MDA (DOD Missile Defense Agency)	$86,413,632	0.1%	Rank history: #66 in FY2021, #72 in FY2022, #73 in FY2023, not on the FY2024 list and #55 in FY2025; down 12 since Jul 2024–Jun 2025.
78	Carnegie Mellon University Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DARPA (Defense Advanced Research Projects Agency)	$85,878,541	0.1%	Rank history: #47 in FY2021, #47 in FY2022, #53 in FY2023, #46 in FY2024 and #54 in FY2025; down 26 since Jul 2024–Jun 2025.
79	Dzyne Technologies, LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$85,748,686	0.1%	Rank history: not on the FY2021–FY2025 lists; up 108 since Jul 2024–Jun 2025.
80	Anduril Industries Inc. 3 awardees, including Exoanalytic Solutions Inc. Top agencies USAF (Department of the Air Force) OSD (Office of the Secretary of Defense) Navy (Department of the Navy)	$84,919,489	0.1%	Rank history: not on the FY2021–FY2024 lists and #89 in FY2025; up 16 since Jul 2024–Jun 2025.
81	University of Texas System 3 awardees, including University of Texas At Austin and University of Texas Health Science Center of San Antonio Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$83,727,293	0.1%	Rank history: #60 in FY2021, #52 in FY2022, #69 in FY2023, #89 in FY2024 and not on the FY2025 list; new, not ranked in Jul 2024–Jun 2025.
82	Basilea Pharmaceutica AG Through Basilea Pharmaceutica International Ltd, Allschwil Top agencies HHS (Department of Health and Human Services)	$83,140,980	0.1%	Rank history: not on the FY2021–FY2025 lists; up 123 since Jul 2024–Jun 2025.
83	Axient LLC Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration)	$82,555,084	0.1%	Rank history: #64 in FY2021, #53 in FY2022, #72 in FY2023, #72 in FY2024 and #75 in FY2025; up 8 since Jul 2024–Jun 2025.
84	Qinetiq Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) MDA (DOD Missile Defense Agency)	$81,609,522	0.1%	Rank history: not on the FY2021–FY2023 lists, #79 in FY2024 and #65 in FY2025; down 25 since Jul 2024–Jun 2025.
85	Advanced Technology International Top agencies Navy (Department of the Navy) HHS (Department of Health and Human Services) DLA (Defense Logistics Agency)	$81,364,323	0.1%	Rank history: not on the FY2021–FY2023 lists, #15 in FY2024 and not on the FY2025 list; new, not ranked in Jul 2024–Jun 2025.
86	J.f. Taylor, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$79,276,558	0.1%	Rank history: not on the FY2021–FY2024 lists and #93 in FY2025; up 18 since Jul 2024–Jun 2025.
87	Abacus Technology Corporation Top agencies USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$77,345,754	0.1%	Rank history: not on the FY2021–FY2025 lists; up 103 since Jul 2024–Jun 2025.
88	Adnet Systems Inc. Top agencies NASA (National Aeronautics and Space Administration) MDA (DOD Missile Defense Agency)	$75,275,598	0.1%	Rank history: #94 in FY2021, not on the FY2022–FY2024 lists and #80 in FY2025; up 10 since Jul 2024–Jun 2025.
89	Intrepid LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$73,217,104	0.1%	Rank history: not on the FY2021–FY2023 lists, #42 in FY2024 and #41 in FY2025; down 49 since Jul 2024–Jun 2025.
90	Technical Resources International, Inc. Top agencies HHS (Department of Health and Human Services)	$72,202,359	0.1%	Rank history: #77 in FY2021, #92 in FY2022, #28 in FY2023 and not on the FY2024–FY2025 lists; up 13 since Jul 2024–Jun 2025.
91	Ntsi LLC Top agencies MDA (DOD Missile Defense Agency) OSD (Office of the Secretary of Defense)	$71,377,378	0.1%	Rank history: not on the FY2021–FY2025 lists; up 53 since Jul 2024–Jun 2025.
92	Colsa Corp Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$70,723,793	0.1%	Rank history: #29 in FY2021, #51 in FY2022, #81 in FY2023, #75 in FY2024 and #85 in FY2025; up 28 since Jul 2024–Jun 2025.
93	Aerodyne-Sgt Engineering Services, LLC Top agencies NASA (National Aeronautics and Space Administration)	$70,126,601	0.1%	Rank history: not on the FY2021–FY2022 lists, #67 in FY2023, #78 in FY2024 and #74 in FY2025; down 8 since Jul 2024–Jun 2025.
94	Universal Technical Resource Services Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$69,978,727	0.1%	Rank history: not on the FY2021–FY2025 lists; up 15 since Jul 2024–Jun 2025.
95	Sri International Top agencies DARPA (Defense Advanced Research Projects Agency) HHS (Department of Health and Human Services) Navy (Department of the Navy)	$69,926,802	0.1%	Rank history: #57 in FY2021, #55 in FY2022, #66 in FY2023, #74 in FY2024 and #79 in FY2025; down 16 since Jul 2024–Jun 2025.
96	Credence Management Solutions Limited Liability Company Top agencies USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$69,652,402	0.1%	Rank history: not on the FY2021–FY2023 lists, #96 in FY2024 and not on the FY2025 list; down 4 since Jul 2024–Jun 2025.
97	Science Systems and Applications, Inc. Top agencies NASA (National Aeronautics and Space Administration) DOI (Department of the Interior) MDA (DOD Missile Defense Agency)	$68,795,265	0.1%	Rank history: #36 in FY2021, #38 in FY2022, #44 in FY2023, #48 in FY2024 and #56 in FY2025; down 46 since Jul 2024–Jun 2025.
98	University of Texas At Austin Top agencies Navy (Department of the Navy) Army (Department of the Army) OSD (Office of the Secretary of Defense)	$67,444,725	0.1%	Rank history: not on the FY2021–FY2024 lists and #52 in FY2025; down 41 since Jul 2024–Jun 2025.
99	Sumaria Systems, LLC Top agencies USAF (Department of the Air Force) DTRA (Defense Threat Reduction Agency) MDA (DOD Missile Defense Agency)	$66,333,419	0.1%	Rank history: #98 in FY2021, #97 in FY2022, not on the FY2023–FY2024 lists and #87 in FY2025; up 14 since Jul 2024–Jun 2025.
100	Two Six Labs, LLC Top agencies WHS (DOD Washington Headquarters Service) DARPA (Defense Advanced Research Projects Agency) USAF (Department of the Air Force)	$65,843,365	0.1%	Rank history: not on the FY2021–FY2024 lists and #97 in FY2025; up 2 since Jul 2024–Jun 2025.

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100 of 5,572 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)	$51,724,355,208	Lockheed Martin Corporation
541714 Research and Development in Biotechnology (except Nanobiotechnology)	$2,048,505,131	Albert B. Sabin Vaccine Institute, Inc. (The)
541713 Research and Development in Nanotechnology	$381,057,418	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 $65.9 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.
Period: the trailing 12 months end with the last month that ended at least 90 days ago, because the Department of Defense reports its contract actions to FPDS about 90 days late. The list is rebuilt each night.
Rank changes compare with Jul 2024–Jun 2025. "New" marks a company outside that period's top 500, and "Returned" one of those that was on an earlier fiscal year's list.
Rank lines show each company's rank on every fiscal year's list since FY2021, #1 at the top, on a scale that gives the top of the list more room. A dashed stretch spans years it wasn't on the list.
Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

Quick answers

Who were the top 10 NAICS 54171 contractors in Jul 2025–Jun 2026?

1. Lockheed Martin Corporation ($7.27B), 2. Fluor Corporation ($3.39B), 3. RTX Corporation ($2.47B), 4. California Institute of Technology ($2.29B), 5. Johns Hopkins University ($2.06B), 6. Northrop Grumman Systems Corporation ($1.85B), 7. Leidos Holdings, Inc. ($1.71B), 8. Massachusetts Institute of Technology ($1.62B), 9. The Mitre Corporation ($1.53B), 10. The Aerospace Corporation ($1.41B).

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