Top 100 National Aeronautics and Space Administration Contractors, FY2024

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	California Institute of Technology 3 awardees Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 611310 Colleges, Universities, and Professional Schools	$2,212,041,937	13.5%	Rank history: #1 in FY2021, #1 in FY2022, #1 in FY2023 and #1 in FY2025; unchanged since FY2023.
2	Space Exploration Technologies Corp. Top NAICS codes 336414 Guided Missile and Space Vehicle Manufacturing 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 481212 Nonscheduled Chartered Freight Air Transportation	$1,589,359,569	9.7%	Rank history: #3 in FY2021, #3 in FY2022, #2 in FY2023 and #3 in FY2025; unchanged since FY2023.
3	The Boeing Company 19 awardees, including Millennium Space Systems, Inc., Aurora Flight Sciences Corporation and Boeing Aerospace Operations, Inc. Top NAICS codes 336414 Guided Missile and Space Vehicle Manufacturing 336415 Guided Missile and Space Vehicle Propulsion Unit and Propulsion Unit Parts Manufacturing 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$1,510,042,677	9.2%	Rank history: #2 in FY2021, #2 in FY2022, #3 in FY2023 and #2 in FY2025; unchanged since FY2023.
4	Lockheed Martin Corporation 11 awardees, including Astrotech Space Operations, LLC and Lockheed Martin Integrated Systems, LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 336411 Aircraft Manufacturing 336414 Guided Missile and Space Vehicle Manufacturing	$647,984,086	4.0%	Rank history: #4 in FY2021, #4 in FY2022, #4 in FY2023 and #7 in FY2025; unchanged since FY2023.
5	Blue Origin LLC 2 awardees, including Blue Origin Washington, LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 481212 Nonscheduled Chartered Freight Air Transportation	$503,942,293	3.1%	Rank history: #60 in FY2021, not on the FY2022 list, #8 in FY2023 and #4 in FY2025; up 3 since FY2023.
6	L3Harris Technologies, Inc. 6 awardees, including Aerojet Rocketdyne of DE, Inc., Aerojet Rocketdyne, Inc. and NV5 Geospatial Solutions, Inc. Top NAICS codes 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) 333314 Optical Instrument and Lens Manufacturing 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$372,016,733	2.3%	Rank history: #34 in FY2021, #30 in FY2022, #47 in FY2023 and #11 in FY2025; up 41 since FY2023.
7	Bechtel Corp Through Bechtel National, Inc. Top NAICS codes 236210 Industrial Building Construction	$322,596,908	2.0%	Rank history: #35 in FY2021, #52 in FY2022, #13 in FY2023 and #14 in FY2025; up 6 since FY2023.
8	The Johns Hopkins University Applied Physics Laboratory LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$309,483,277	1.9%	Rank history: not on the FY2021 list, #86 in FY2022, not on the FY2023 list and not on the FY2025 list; returned.
9	Peraton Inc. Top NAICS codes 541330 Engineering Services 517919 All Other Telecommunications 541512 Computer Systems Design Services	$292,355,447	1.8%	Rank history: not on the FY2021–FY2023 lists and #5 in FY2025; new.
10	Jacobs Government Services Company 3 awardees, including Amentum Technology, Inc. and Jacobs Engineering Group Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 561210 Facilities Support Services 541330 Engineering Services	$285,578,203	1.7%	Rank history: not on the FY2021–FY2023 lists and #47 in FY2025; new.
11	KBR Wyle Services LLC 4 awardees Top NAICS codes 541330 Engineering Services 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) 517919 All Other Telecommunications	$282,571,877	1.7%	Rank history: not on the FY2021–FY2022 lists, #71 in FY2023 and #10 in FY2025; up 60 since FY2023.
12	Association of Universities for Research In Astronomy, Inc. 3 awardees Top NAICS codes 333314 Optical Instrument and Lens Manufacturing 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$253,159,518	1.5%	Rank history: #20 in FY2021, #10 in FY2022, #15 in FY2023 and #12 in FY2025; up 3 since FY2023.
13	Northrop Grumman Corporation 14 awardees, including Northrop Grumman Systems Corporation Top NAICS codes 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) 336415 Guided Missile and Space Vehicle Propulsion Unit and Propulsion Unit Parts Manufacturing 488190 Other Support Activities for Air Transportation	$247,810,478	1.5%	Rank history: #5 in FY2021, #6 in FY2022, #6 in FY2023 and #9 in FY2025; down 7 since FY2023.
14	RTX Corporation 17 awardees, including Hamilton Sundstrand Space Systems International, Inc., Raytheon Company and Rohr, Inc. Top NAICS codes 336419 Other Guided Missile and Space Vehicle Parts and Auxiliary Equipment Manufacturing 541512 Computer Systems Design Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$217,737,958	1.3%	Rank history: not on the FY2021–FY2023 lists and #13 in FY2025; up 109 since FY2023.
15	Science Systems and Applications, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) 541990 All Other Professional, Scientific, and Technical Services	$192,244,227	1.2%	Rank history: #12 in FY2021, #13 in FY2022, #14 in FY2023 and #17 in FY2025; down 1 since FY2023.
16	The Johns Hopkins University 2 awardees, including The Johns Hopkins University Applied Physics Laboratory LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$155,158,010	0.9%	Rank history: #9 in FY2021, #8 in FY2022, #5 in FY2023 and not on the FY2025 list; down 11 since FY2023.
17	Axiom Space Inc. Top NAICS codes 336414 Guided Missile and Space Vehicle Manufacturing 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$133,797,526	0.8%	Rank history: not on the FY2021 list, #43 in FY2022, #31 in FY2023 and #19 in FY2025; up 14 since FY2023.
18	Air Products and Chemicals, Inc. Top NAICS codes 325120 Industrial Gas Manufacturing	$125,553,400	0.8%	Rank history: #52 in FY2021, #39 in FY2022, #16 in FY2023 and #27 in FY2025; down 2 since FY2023.
19	Space Network Solutions LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$125,314,492	0.8%	Rank history: not on the FY2021–FY2022 lists, #89 in FY2023 and #31 in FY2025; up 70 since FY2023.
20	Southwest Research Institute Top NAICS codes 336414 Guided Missile and Space Vehicle Manufacturing 541330 Engineering Services 541611 Administrative Management and General Management Consulting Services	$119,691,359	0.7%	Rank history: #18 in FY2021, #27 in FY2022, #34 in FY2023 and #21 in FY2025; up 14 since FY2023.
21	The Aerospace Corporation Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 336414 Guided Missile and Space Vehicle Manufacturing	$115,392,298	0.7%	Rank history: #25 in FY2021, #28 in FY2022, #22 in FY2023 and #22 in FY2025; up 1 since FY2023.
22	Kbr, Inc. 3 awardees, including KBR Wyle Services, LLC Top NAICS codes 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) 541330 Engineering Services 541512 Computer Systems Design Services	$114,248,199	0.7%	Rank history: #8 in FY2021, #7 in FY2022, #10 in FY2023 and not on the FY2025 list; down 12 since FY2023.
23	Pacific TECH Construction Inc. Top NAICS codes 238160 Roofing Contractors	$108,281,936	0.7%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
24	Intuitive Machines, LLC Top NAICS codes 481212 Nonscheduled Chartered Freight Air Transportation 517410 Satellite Telecommunications 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$103,884,423	0.6%	Rank history: #30 in FY2021, #22 in FY2022, #42 in FY2023 and #90 in FY2025; up 18 since FY2023.
25	Aerodyne-Sgt Engineering Services, LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$101,244,456	0.6%	Rank history: not on the FY2021 list, #50 in FY2022, #19 in FY2023 and #28 in FY2025; down 6 since FY2023.
26	Science Applications International Corporation 3 awardees Top NAICS codes 541512 Computer Systems Design Services 541330 Engineering Services 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)	$100,640,271	0.6%	Rank history: #10 in FY2021, #11 in FY2022, #12 in FY2023 and not on the FY2025 list; down 14 since FY2023.
27	Chenega Global Protection, LLC Top NAICS codes 561612 Security Guards and Patrol Services 561990 All Other Support Services	$98,919,781	0.6%	Rank history: not on the FY2021–FY2023 lists and #16 in FY2025; new.
28	The Regents of the University of Colorado 2 awardees Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) 336419 Other Guided Missile and Space Vehicle Parts and Auxiliary Equipment Manufacturing	$84,542,305	0.5%	Rank history: #21 in FY2021, #20 in FY2022, #28 in FY2023 and #26 in FY2025; unchanged since FY2023.
29	Teledyne Technologies Incorporated 5 awardees, including Teledyne Brown Engineering, Inc., Teledyne Energy Systems, Inc. and Teledyne Flir Commercial Systems, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) 334513 Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables	$84,492,980	0.5%	Rank history: #28 in FY2021, #36 in FY2022, #27 in FY2023 and #33 in FY2025; down 2 since FY2023.
30	Barrios Technology, LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)	$82,349,120	0.5%	Rank history: #36 in FY2021, #31 in FY2022, #36 in FY2023 and #42 in FY2025; up 6 since FY2023.
31	Smithsonian Institution Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)	$78,886,441	0.5%	Rank history: not on the FY2021–FY2023 lists and #29 in FY2025; new.
32	HP Enterprise Services LLC Through Peraton Inc. Top NAICS codes 517919 All Other Telecommunications 541330 Engineering Services 541512 Computer Systems Design Services	$78,196,230	0.5%	Rank history: #15 in FY2021, #12 in FY2022, #11 in FY2023 and not on the FY2025 list; down 21 since FY2023.
33	General Electric Company 4 awardees Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) 811210 Electronic and Precision Equipment Repair and Maintenance	$76,053,424	0.5%	Rank history: #40 in FY2021, #49 in FY2022, #40 in FY2023 and #36 in FY2025; up 7 since FY2023.
34	Booz Allen Hamilton Holding Corporation Through Booz Allen Hamilton Inc. Top NAICS codes 541330 Engineering Services 541611 Administrative Management and General Management Consulting Services 541990 All Other Professional, Scientific, and Technical Services	$72,739,702	0.4%	Rank history: #42 in FY2021, #35 in FY2022, #30 in FY2023 and #35 in FY2025; down 4 since FY2023.
35	Yulista Solutions, LLC Top NAICS codes 488190 Other Support Activities for Air Transportation	$72,308,072	0.4%	Rank history: not on the FY2021–FY2022 lists, #43 in FY2023 and #38 in FY2025; up 8 since FY2023.
36	Mitchell Vantage Systems LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$71,107,227	0.4%	Rank history: not on the FY2021–FY2022 lists, #26 in FY2023 and #45 in FY2025; down 10 since FY2023.
37	Syncom Space Services LLC Top NAICS codes 561210 Facilities Support Services	$70,123,365	0.4%	Rank history: #17 in FY2021, #16 in FY2022, #18 in FY2023 and not on the FY2025 list; down 19 since FY2023.
38	Arctic Slope Regional Corporation 8 awardees, including Asrc Federal Facilities Logistics LLC, Inuteq, LLC and Asrc Federal System Solutions LLC Top NAICS codes 561210 Facilities Support Services 541513 Computer Facilities Management Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$69,038,395	0.4%	Rank history: #16 in FY2021, #15 in FY2022, #35 in FY2023 and #15 in FY2025; down 3 since FY2023.
39	Adnet Systems Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$68,355,096	0.4%	Rank history: #37 in FY2021, #38 in FY2022, #37 in FY2023 and #30 in FY2025; down 2 since FY2023.
40	Amentum Services, Inc. 3 awardees, including Syncom Space Services LLC and Centra Technology, Inc. Top NAICS codes 561210 Facilities Support Services 541330 Engineering Services	$66,432,165	0.4%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
41	University of Maryland, College Park Top NAICS codes 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$63,348,964	0.4%	Rank history: not on the FY2021 list, #87 in FY2022, not on the FY2023 list and #23 in FY2025; up 106 since FY2023.
42	L3HARRIS Aviation Products Inc 4 awardees, including Aerojet Rocketdyne of DE, Inc., L3Harris Technologies, Inc. and Aerojet Rocketdyne, Inc. Top NAICS codes 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) 333314 Optical Instrument and Lens Manufacturing	$62,181,096	0.4%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
43	Agile Decision Sciences, LLC Top NAICS codes 561110 Office Administrative Services 541330 Engineering Services	$61,494,467	0.4%	Rank history: #50 in FY2021, #46 in FY2022, #51 in FY2023 and not on the FY2025 list; up 8 since FY2023.
44	Four Points Technology, L.L.C. Top NAICS codes 541519 Other Computer Related Services	$56,228,449	0.3%	Rank history: #89 in FY2021, #92 in FY2022, #62 in FY2023 and #52 in FY2025; up 18 since FY2023.
45	Rsi-Quantitech JV LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$55,079,775	0.3%	Rank history: not on the FY2021–FY2023 lists and #37 in FY2025; new.
46	Northrop Grumman Systems Corporation Top NAICS codes 336415 Guided Missile and Space Vehicle Propulsion Unit and Propulsion Unit Parts Manufacturing	$54,500,000	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
47	Jacobs Engineering Group Inc. 5 awardees, including Amentum Technology, Inc. and Ch2M Hill, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 561210 Facilities Support Services 541330 Engineering Services	$53,007,060	0.3%	Rank history: #6 in FY2021, #5 in FY2022, #7 in FY2023 and not on the FY2025 list; down 40 since FY2023.
48	Leidos Holdings, Inc. 4 awardees, including Leidos, Inc. and Dynetics, Inc. Top NAICS codes 541690 Other Scientific and Technical Consulting Services 541330 Engineering Services 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)	$52,914,166	0.3%	Rank history: #13 in FY2021, #21 in FY2022, #39 in FY2023 and #44 in FY2025; down 9 since FY2023.
49	Amentum Spaceport LLC Top NAICS codes 561210 Facilities Support Services	$49,058,075	0.3%	Rank history: #29 in FY2021, not on the FY2022–FY2023 lists and not on the FY2025 list; returned.
50	Amentum Holdings, Inc. 3 awardees, including Amentum Spaceport LLC, Syncom Space Services LLC and Amentum Services, Inc. Top NAICS codes 561210 Facilities Support Services 541330 Engineering Services 541380 Testing Laboratories and Services	$48,669,224	0.3%	Rank history: not on the FY2021–FY2023 lists and #6 in FY2025; new.
51	Minburn Technology Group, LLC Top NAICS codes 541519 Other Computer Related Services	$48,575,519	0.3%	Rank history: not on the FY2021–FY2022 lists, #56 in FY2023 and #51 in FY2025; up 5 since FY2023.
52	The Charles Stark Draper Laboratory, Inc. Top NAICS codes 481212 Nonscheduled Chartered Freight Air Transportation	$48,574,702	0.3%	Rank history: not on the FY2021 list, #56 in FY2022, not on the FY2023 list and not on the FY2025 list; returned.
53	Inuteq, LLC Top NAICS codes 541513 Computer Facilities Management Services	$48,489,033	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
54	Bastion Technologies, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 561210 Facilities Support Services	$46,400,905	0.3%	Rank history: #47 in FY2021, #45 in FY2022, #45 in FY2023 and #46 in FY2025; down 9 since FY2023.
55	Manufacturing Technical Solutions, LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$44,195,745	0.3%	Rank history: #46 in FY2021, #57 in FY2022, #54 in FY2023 and not on the FY2025 list; down 1 since FY2023.
56	Astrion Group, LLC Top NAICS codes 541380 Testing Laboratories and Services	$41,591,723	0.3%	Rank history: not on the FY2021–FY2022 lists, #53 in FY2023 and #39 in FY2025; down 3 since FY2023.
57	Trax International Corporation Top NAICS codes 561110 Office Administrative Services 561210 Facilities Support Services	$40,789,172	0.2%	Rank history: #43 in FY2021, #37 in FY2022, #48 in FY2023 and #61 in FY2025; down 9 since FY2023.
58	Thundercat Technology LLC Top NAICS codes 541519 Other Computer Related Services	$39,942,448	0.2%	Rank history: not on the FY2021–FY2022 lists, #61 in FY2023 and #43 in FY2025; up 3 since FY2023.
59	Firefly Aerospace Inc. Top NAICS codes 481212 Nonscheduled Chartered Freight Air Transportation 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$39,167,711	0.2%	Rank history: not on the FY2021–FY2023 lists and #24 in FY2025; new.
60	OPR LLC Top NAICS codes 541330 Engineering Services	$36,740,735	0.2%	Rank history: #59 in FY2021, #62 in FY2022, #60 in FY2023 and #59 in FY2025; unchanged since FY2023.
61	United Launch Alliance, L.L.C. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$34,977,529	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 42 since FY2023.
62	The Regents of the University of California Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)	$34,215,934	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
63	Diversified Construction of Oklahoma, Inc. Top NAICS codes 236210 Industrial Building Construction	$31,765,731	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 408 since FY2023.
64	Colsa Corp Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$30,751,880	0.2%	Rank history: #53 in FY2021, #65 in FY2022, not on the FY2023 list and #63 in FY2025; up 93 since FY2023.
65	PCI Productions LLC Top NAICS codes 541820 Public Relations Agencies 561110 Office Administrative Services	$28,145,129	0.2%	Rank history: not on the FY2021–FY2023 lists and #53 in FY2025; up 123 since FY2023.
66	Bay Area Environmental Research Institute	$25,918,755	0.2%	Rank history: #76 in FY2021, #79 in FY2022, #84 in FY2023 and #64 in FY2025; up 18 since FY2023.
67	The Chenega Corporation Through Chenega Global Protection, LLC Top NAICS codes 561612 Security Guards and Patrol Services 561990 All Other Support Services	$25,906,173	0.2%	Rank history: not on the FY2021 list, #63 in FY2022, #23 in FY2023 and not on the FY2025 list; down 44 since FY2023.
68	Massachusetts Institute of Technology Top NAICS codes 611310 Colleges, Universities, and Professional Schools 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 927110 Space Research and Technology	$25,899,654	0.2%	Rank history: #65 in FY2021, #53 in FY2022, #66 in FY2023 and #57 in FY2025; down 2 since FY2023.
69	University System of Maryland 5 awardees, including University of Maryland, College Park, University of Maryland Baltimore County and University of Maryland Center for Environmental Science Top NAICS codes 813920 Professional Organizations	$25,515,993	0.2%	Rank history: #33 in FY2021, #24 in FY2022, #21 in FY2023 and not on the FY2025 list; down 48 since FY2023.
70	Amentum Technology, Inc. Top NAICS codes 561210 Facilities Support Services	$24,244,485	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
71	Mccallie Associates, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$24,072,587	0.1%	Rank history: not on the FY2021–FY2023 lists and #77 in FY2025; new.
72	State of California Controllers Office 13 awardees, including The Regents of the University of California, University of California, LOS Angeles and University of California, Davis Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 336419 Other Guided Missile and Space Vehicle Parts and Auxiliary Equipment Manufacturing 336414 Guided Missile and Space Vehicle Manufacturing	$23,965,888	0.1%	Rank history: #22 in FY2021, #17 in FY2022, #20 in FY2023 and not on the FY2025 list; down 52 since FY2023.
73	The Trustees of Columbia University In the City of New York Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$23,944,295	0.1%	Rank history: #85 in FY2021, #76 in FY2022, #81 in FY2023 and #92 in FY2025; up 8 since FY2023.
74	Axient LLC Top NAICS codes 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$23,563,681	0.1%	Rank history: #55 in FY2021, #55 in FY2022, #58 in FY2023 and #83 in FY2025; down 16 since FY2023.
75	CBF Partners JV LLC Top NAICS codes 561110 Office Administrative Services	$23,521,817	0.1%	Rank history: not on the FY2021–FY2022 lists, #97 in FY2023 and not on the FY2025 list; up 22 since FY2023.
76	Healtheon, Inc. Top NAICS codes 236210 Industrial Building Construction	$23,339,612	0.1%	Rank history: #74 in FY2021, #33 in FY2022, #49 in FY2023 and #86 in FY2025; down 27 since FY2023.
77	The University of Alabama System 2 awardees, including The University of Alabama In Huntsville and University of Alabama Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$23,141,012	0.1%	Rank history: #61 in FY2021, #59 in FY2022, #52 in FY2023 and not on the FY2025 list; down 25 since FY2023.
78	Halvik LLC Top NAICS codes 541330 Engineering Services	$23,000,000	0.1%	Rank history: not on the FY2021 list, #67 in FY2022, #63 in FY2023 and #54 in FY2025; down 15 since FY2023.
79	Ball Corp Through BAE Systems Space & Mission Systems Inc. Top NAICS codes 336414 Guided Missile and Space Vehicle Manufacturing 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)	$22,665,481	0.1%	Rank history: #19 in FY2021, #25 in FY2022, #46 in FY2023 and not on the FY2025 list; down 33 since FY2023.
80	University of Arizona Top NAICS codes 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)	$22,496,161	0.1%	Rank history: not on the FY2021–FY2023 lists and #32 in FY2025; up 68 since FY2023.
81	Universities Space Research Association Top NAICS codes 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)	$22,267,161	0.1%	Rank history: #24 in FY2021, #40 in FY2022, not on the FY2023 list and #96 in FY2025; up 159 since FY2023.
82	Guardians of Honor, LLC Top NAICS codes 611710 Educational Support Services	$22,229,313	0.1%	Rank history: not on the FY2021–FY2023 lists and #67 in FY2025; new.
83	University of Alaska System 3 awardees, including University of Alaska Fairbanks and University of Alaska Anchorage Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 561210 Facilities Support Services 611310 Colleges, Universities, and Professional Schools	$22,074,843	0.1%	Rank history: #81 in FY2021, #70 in FY2022, #77 in FY2023 and not on the FY2025 list; down 6 since FY2023.
84	Techtrans International Inc. Top NAICS codes 493110 General Warehousing and Storage 541930 Translation and Interpretation Services	$22,014,940	0.1%	Rank history: #72 in FY2021, #72 in FY2022, #80 in FY2023 and #71 in FY2025; down 4 since FY2023.
85	Metis Flight Research Associates, LLC Top NAICS codes 541330 Engineering Services	$21,786,889	0.1%	Rank history: #75 in FY2021, #58 in FY2022, #55 in FY2023 and not on the FY2025 list; down 30 since FY2023.
86	Maxar Technologies Inc. Through Lanteris Space LLC Top NAICS codes 336414 Guided Missile and Space Vehicle Manufacturing 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)	$21,298,381	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 124 since FY2023.
87	Catholic University of America (The)	$21,183,943	0.1%	Rank history: #86 in FY2021, not on the FY2022 list, #94 in FY2023 and #70 in FY2025; up 7 since FY2023.
88	Analytical Mechanics Associates Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)	$20,656,256	0.1%	Rank history: not on the FY2021–FY2022 lists, #93 in FY2023 and #55 in FY2025; up 5 since FY2023.
89	Oak Ridge Associated Universities, Incorporated Top NAICS codes 541612 Human Resources Consulting Services	$20,188,206	0.1%	Rank history: not on the FY2021 list, #85 in FY2022, #73 in FY2023 and #66 in FY2025; down 16 since FY2023.
90	Commonwealth Scientific and Industrial Research Organisation Top NAICS codes 561210 Facilities Support Services	$18,710,813	0.1%	Rank history: not on the FY2021–FY2023 lists and #76 in FY2025; up 86 since FY2023.
91	Ares Technical Services Corporation Top NAICS codes 541330 Engineering Services	$18,086,421	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
92	Georgia TECH Research Corp Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 611310 Colleges, Universities, and Professional Schools	$17,952,229	0.1%	Rank history: #96 in FY2021, not on the FY2022–FY2023 lists and #85 in FY2025; up 9 since FY2023.
93	Regents of the University of Michigan Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 336419 Other Guided Missile and Space Vehicle Parts and Auxiliary Equipment Manufacturing 611310 Colleges, Universities, and Professional Schools	$17,787,425	0.1%	Rank history: #98 in FY2021, not on the FY2022 list, #99 in FY2023 and #78 in FY2025; up 6 since FY2023.
94	Victory Solutions, LLC Top NAICS codes 541330 Engineering Services	$17,455,667	0.1%	Rank history: #97 in FY2021, not on the FY2022–FY2023 lists and #100 in FY2025; returned.
95	The Trustees of Princeton University Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 334511 Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing	$17,405,490	0.1%	Rank history: not on the FY2021 list, #99 in FY2022, not on the FY2023 list and not on the FY2025 list; up 29 since FY2023.
96	University Corporation for Atmospheric Research Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541511 Custom Computer Programming Services	$17,179,056	0.1%	Rank history: #88 in FY2021, #81 in FY2022, #96 in FY2023 and not on the FY2025 list; unchanged since FY2023.
97	University of Hawaii Top NAICS codes 517410 Satellite Telecommunications 561210 Facilities Support Services	$16,880,226	0.1%	Rank history: not on the FY2021–FY2023 lists and #81 in FY2025; new.
98	Stellar Solutions Inc. Top NAICS codes 541330 Engineering Services	$16,805,868	0.1%	Rank history: not on the FY2021–FY2022 lists, #83 in FY2023 and #99 in FY2025; down 15 since FY2023.
99	Baylor College of Medicine	$16,472,985	0.1%	Rank history: #87 in FY2021, not on the FY2022–FY2023 lists and not on the FY2025 list; up 9 since FY2023.
100	San Jose State University Research Foundation	$16,137,886	0.1%	Rank history: #94 in FY2021, not on the FY2022–FY2023 lists and #88 in FY2025; up 5 since FY2023.

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 $16.4 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