Top 100 National Aeronautics and Space Administration Contractors, Jul 2025–Jun 2026

Name: Top 100 National Aeronautics and Space Administration Contractors, Jul 2025–Jun 2026
Creator: GovTribe
License: https://creativecommons.org/licenses/by/4.0/

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

The top 10 won 48% of National Aeronautics and Space Administration contract dollars from July 2025 through June 2026

Contract obligations: $15,477,398,431 Net of deobligations, by the National Aeronautics and Space Administration and its offices
Contractors: 2,370 Parent companies with an obligation
Largest contractor: California Institute of Technology $2.29 billion, 14.3% of obligations
Data as of: Oct 21, 2026

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

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	California Institute of Technology 2 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	$2,288,718,943	14.3%	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	The Boeing Company 13 awardees, including Millennium Space Systems, Inc., Boeing Aerospace Operations, Inc. and Aurora Flight Sciences Corporation Top NAICS codes 336414 Guided Missile and Space Vehicle Manufacturing 336415 Guided Missile and Space Vehicle Propulsion Unit and Propulsion Unit Parts Manufacturing 811219 Other Electronic and Precision Equipment Repair and Maintenance	$1,354,208,144	8.4%	Rank history: #2 in FY2021, #2 in FY2022, #3 in FY2023, #3 in FY2024 and #2 in FY2025; unchanged since Jul 2024–Jun 2025.
3	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) 517410 Satellite Telecommunications	$869,201,912	5.4%	Rank history: #3 in FY2021, #3 in FY2022, #2 in FY2023, #2 in FY2024 and #3 in FY2025; unchanged since Jul 2024–Jun 2025.
4	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	$631,725,458	3.9%	Rank history: #60 in FY2021, not on the FY2022 list, #8 in FY2023, #5 in FY2024 and #4 in FY2025; unchanged since Jul 2024–Jun 2025.
5	Northrop Grumman Systems Corporation 12 awardees, including Scaled Composites, 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) 336415 Guided Missile and Space Vehicle Propulsion Unit and Propulsion Unit Parts Manufacturing	$529,796,883	3.3%	Rank history: #5 in FY2021, #6 in FY2022, #6 in FY2023, #13 in FY2024 and #9 in FY2025; up 5 since Jul 2024–Jun 2025.
6	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) 541330 Engineering Services	$464,520,179	2.9%	Rank history: not on the FY2021–FY2024 lists and #8 in FY2025; up 65 since Jul 2024–Jun 2025.
7	Amentum Holdings, Inc. 7 awardees, including Amentum Technology, Inc., Amentum Spaceport LLC and Amentum Services, 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	$435,267,127	2.7%	Rank history: not on the FY2021–FY2023 lists, #50 in FY2024 and #6 in FY2025; unchanged since Jul 2024–Jun 2025.
8	Peraton Inc. Top NAICS codes 517919 All Other Telecommunications 541330 Engineering Services 541512 Computer Systems Design Services	$411,153,954	2.6%	Rank history: not on the FY2021–FY2023 lists, #9 in FY2024 and #5 in FY2025; up 3 since Jul 2024–Jun 2025.
9	Lockheed Martin Corporation 9 awardees, including Lockheed Martin Integrated Systems, LLC, Astrotech Space Operations, LLC and Lockheed Martin Services, LLC 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 336411 Aircraft Manufacturing	$376,388,490	2.3%	Rank history: #4 in FY2021, #4 in FY2022, #4 in FY2023, #4 in FY2024 and #7 in FY2025; down 4 since Jul 2024–Jun 2025.
10	KBR Wyle Services LLC 3 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) 541330 Engineering Services	$367,439,334	2.3%	Rank history: not on the FY2021–FY2022 lists, #71 in FY2023, #11 in FY2024 and #10 in FY2025; down 1 since Jul 2024–Jun 2025.
11	L3Harris Technologies, Inc. 8 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) 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 336414 Guided Missile and Space Vehicle Manufacturing	$343,878,229	2.1%	Rank history: #34 in FY2021, #30 in FY2022, #47 in FY2023, #6 in FY2024 and #11 in FY2025; down 3 since Jul 2024–Jun 2025.
12	RTX Corporation 19 awardees, including Raytheon Company, Hamilton Sundstrand Space Systems International, Inc. and Blue Canyon Technologies LLC 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 541512 Computer Systems Design Services	$326,884,800	2.0%	Rank history: #14 in FY2021, #14 in FY2022, #17 in FY2023, #14 in FY2024 and #13 in FY2025; up 2 since Jul 2024–Jun 2025.
13	Blue Origin Manufacturing, LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$301,561,071	1.9%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
14	Bechtel Corp Through Bechtel National, Inc. Top NAICS codes 236210 Industrial Building Construction	$266,900,000	1.7%	Rank history: #35 in FY2021, #52 in FY2022, #13 in FY2023, #7 in FY2024 and #14 in FY2025; down 1 since Jul 2024–Jun 2025.
15	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)	$226,532,791	1.4%	Rank history: #20 in FY2021, #10 in FY2022, #15 in FY2023, #12 in FY2024 and #12 in FY2025; down 3 since Jul 2024–Jun 2025.
16	Nova Space Solutions, LLC Top NAICS codes 561210 Facilities Support Services	$222,742,114	1.4%	Rank history: not on the FY2021–FY2024 lists and #20 in FY2025; up 66 since Jul 2024–Jun 2025.
17	Axiom Space Inc. Top NAICS codes 336414 Guided Missile and Space Vehicle Manufacturing	$215,272,520	1.3%	Rank history: not on the FY2021 list, #43 in FY2022, #31 in FY2023, #17 in FY2024 and #19 in FY2025; up 14 since Jul 2024–Jun 2025.
18	Arctic Slope Regional Corporation 8 awardees, including Inuteq, LLC, Agile Decision Sciences, LLC and Asrc Federal Facilities Logistics LLC Top NAICS codes 541513 Computer Facilities Management Services 561210 Facilities Support Services 561110 Office Administrative Services	$212,424,752	1.3%	Rank history: #16 in FY2021, #15 in FY2022, #35 in FY2023, #38 in FY2024 and #15 in FY2025; up 18 since Jul 2024–Jun 2025.
19	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)	$144,756,241	0.9%	Rank history: not on the FY2021–FY2023 lists, #59 in FY2024 and #24 in FY2025; up 4 since Jul 2024–Jun 2025.
20	CACI International Inc. Through Caci, Inc. - Federal Top NAICS codes 541512 Computer Systems Design Services	$121,974,994	0.8%	Rank history: not on the FY2021–FY2024 lists and #18 in FY2025; up 1 since Jul 2024–Jun 2025.
21	Chenega Global Protection, LLC Top NAICS codes 561612 Security Guards and Patrol Services 561990 All Other Support Services	$117,482,618	0.7%	Rank history: not on the FY2021–FY2023 lists, #27 in FY2024 and #16 in FY2025; down 5 since Jul 2024–Jun 2025.
22	Kbr, Inc. 3 awardees, including KBR Wyle Services, LLC Top NAICS codes 541330 Engineering Services 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)	$114,284,712	0.7%	Rank history: #8 in FY2021, #7 in FY2022, #10 in FY2023, #22 in FY2024 and not on the FY2025 list; new, not ranked in Jul 2024–Jun 2025.
23	The Aerospace Corporation Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$99,754,141	0.6%	Rank history: #25 in FY2021, #28 in FY2022, #22 in FY2023, #21 in FY2024 and #22 in FY2025; down 4 since Jul 2024–Jun 2025.
24	Smithsonian Institution 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)	$92,905,965	0.6%	Rank history: not on the FY2021–FY2023 lists, #31 in FY2024 and #29 in FY2025; unchanged since Jul 2024–Jun 2025.
25	Southwest Research Institute Top NAICS codes 541330 Engineering Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541611 Administrative Management and General Management Consulting Services	$92,815,023	0.6%	Rank history: #18 in FY2021, #27 in FY2022, #34 in FY2023, #20 in FY2024 and #21 in FY2025; up 1 since Jul 2024–Jun 2025.
26	Astrobotic Technology 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) 541713 Research and Development in Nanotechnology	$87,723,914	0.5%	Rank history: #23 in FY2021, #18 in FY2022, #32 in FY2023, not on the FY2024 list and #65 in FY2025; up 195 since Jul 2024–Jun 2025.
27	Air Products and Chemicals, Inc. Top NAICS codes 325120 Industrial Gas Manufacturing	$86,796,069	0.5%	Rank history: #52 in FY2021, #39 in FY2022, #16 in FY2023, #18 in FY2024 and #27 in FY2025; down 9 since Jul 2024–Jun 2025.
28	The Regents of the University of Colorado 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) 541720 Research and Development in the Social Sciences and Humanities	$78,297,244	0.5%	Rank history: #21 in FY2021, #20 in FY2022, #28 in FY2023, #28 in FY2024 and #26 in FY2025; down 1 since Jul 2024–Jun 2025.
29	BAE Systems Space & Mission Systems 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) 334511 Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing	$75,854,478	0.5%	Rank history: not on the FY2021–FY2024 lists and #34 in FY2025; up 14 since Jul 2024–Jun 2025.
30	Adnet Systems Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$75,360,266	0.5%	Rank history: #37 in FY2021, #38 in FY2022, #37 in FY2023, #39 in FY2024 and #30 in FY2025; up 3 since Jul 2024–Jun 2025.
31	Teledyne Flir Unmanned Ground Systems Inc 2 awardees, including Teledyne Brown Engineering, Inc. and Teledyne Energy 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)	$75,061,346	0.5%	Rank history: #28 in FY2021, #36 in FY2022, #27 in FY2023, #29 in FY2024 and #33 in FY2025; up 1 since Jul 2024–Jun 2025.
32	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)	$71,443,508	0.4%	Rank history: #30 in FY2021, #22 in FY2022, #42 in FY2023, #24 in FY2024 and #90 in FY2025; down 12 since Jul 2024–Jun 2025.
33	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)	$70,991,506	0.4%	Rank history: #12 in FY2021, #13 in FY2022, #14 in FY2023, #15 in FY2024 and #17 in FY2025; down 18 since Jul 2024–Jun 2025.
34	Aerodyne-Sgt Engineering Services, LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$70,126,601	0.4%	Rank history: not on the FY2021 list, #50 in FY2022, #19 in FY2023, #25 in FY2024 and #28 in FY2025; down 9 since Jul 2024–Jun 2025.
35	Booz Allen Hamilton Holding Corporation Through Booz Allen Hamilton Inc. Top NAICS codes 541330 Engineering Services 541611 Administrative Management and General Management Consulting Services	$67,227,136	0.4%	Rank history: #42 in FY2021, #35 in FY2022, #30 in FY2023, #34 in FY2024 and #35 in FY2025; up 3 since Jul 2024–Jun 2025.
36	Lunar Outpost Inc. Top NAICS codes 336414 Guided Missile and Space Vehicle Manufacturing	$66,396,470	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
37	Venturi Astrolab Inc Top NAICS codes 336414 Guided Missile and Space Vehicle Manufacturing	$66,082,992	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
38	University of Maryland, College Park Top NAICS codes 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)	$65,393,893	0.4%	Rank history: not on the FY2021 list, #87 in FY2022, not on the FY2023 list, #41 in FY2024 and #23 in FY2025; down 10 since Jul 2024–Jun 2025.
39	Space Network Solutions LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$65,179,033	0.4%	Rank history: not on the FY2021–FY2022 lists, #89 in FY2023, #19 in FY2024 and #31 in FY2025; down 9 since Jul 2024–Jun 2025.
40	Blue Origin, LLC Top NAICS codes 481212 Nonscheduled Chartered Freight Air Transportation 336414 Guided Missile and Space Vehicle Manufacturing 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$62,209,923	0.4%	Rank history: not on the FY2021–FY2025 lists; up 289 since Jul 2024–Jun 2025.
41	Yulista Solutions, LLC Top NAICS codes 488190 Other Support Activities for Air Transportation	$61,482,427	0.4%	Rank history: not on the FY2021–FY2022 lists, #43 in FY2023, #35 in FY2024 and #38 in FY2025; down 2 since Jul 2024–Jun 2025.
42	Halvik LLC Top NAICS codes 541330 Engineering Services	$61,441,264	0.4%	Rank history: not on the FY2021 list, #67 in FY2022, #63 in FY2023, #78 in FY2024 and #54 in FY2025; up 44 since Jul 2024–Jun 2025.
43	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) 336419 Other Guided Missile and Space Vehicle Parts and Auxiliary Equipment Manufacturing	$58,709,438	0.4%	Rank history: not on the FY2021–FY2024 lists and #25 in FY2025; up 244 since Jul 2024–Jun 2025.
44	Leidos Holdings, Inc. 5 awardees, including Leidos, Inc. and Dynetics, Inc. Top NAICS codes 541330 Engineering Services 336419 Other Guided Missile and Space Vehicle Parts and Auxiliary Equipment Manufacturing 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$58,130,913	0.4%	Rank history: #13 in FY2021, #21 in FY2022, #39 in FY2023, #48 in FY2024 and #44 in FY2025; up 7 since Jul 2024–Jun 2025.
45	Columbus Technologies and Services, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$57,325,528	0.4%	Rank history: not on the FY2021–FY2024 lists and #40 in FY2025; up 12 since Jul 2024–Jun 2025.
46	Thundercat Technology LLC Top NAICS codes 541519 Other Computer Related Services	$54,511,856	0.3%	Rank history: not on the FY2021–FY2022 lists, #61 in FY2023, #58 in FY2024 and #43 in FY2025; up 7 since Jul 2024–Jun 2025.
47	Astrion Group, LLC Top NAICS codes 541380 Testing Laboratories and Services	$48,850,411	0.3%	Rank history: not on the FY2021–FY2022 lists, #53 in FY2023, #56 in FY2024 and #39 in FY2025; down 1 since Jul 2024–Jun 2025.
48	Advon Corporation Top NAICS codes 236210 Industrial Building Construction	$47,804,576	0.3%	Rank history: not on the FY2021 list, #94 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
49	Advanced Space LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541713 Research and Development in Nanotechnology	$45,808,349	0.3%	Rank history: not on the FY2021–FY2024 lists and #84 in FY2025; up 111 since Jul 2024–Jun 2025.
50	University of Arizona Top NAICS codes 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) 611310 Colleges, Universities, and Professional Schools	$44,651,352	0.3%	Rank history: not on the FY2021–FY2023 lists, #80 in FY2024 and #32 in FY2025; down 2 since Jul 2024–Jun 2025.
51	A & H-Ambica JV LLC Top NAICS codes 236210 Industrial Building Construction	$44,269,111	0.3%	Rank history: #66 in FY2021, not on the FY2022–FY2024 lists and #82 in FY2025; up 97 since Jul 2024–Jun 2025.
52	Rsi-Quantitech JV LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$43,702,046	0.3%	Rank history: not on the FY2021–FY2023 lists, #45 in FY2024 and #37 in FY2025; down 8 since Jul 2024–Jun 2025.
53	Science Applications International Corporation Top NAICS codes 541330 Engineering Services 541513 Computer Facilities Management Services 541512 Computer Systems Design Services	$43,399,458	0.3%	Rank history: #10 in FY2021, #11 in FY2022, not on the FY2023–FY2024 lists and #41 in FY2025; down 8 since Jul 2024–Jun 2025.
54	Mitchell Vantage Systems LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$37,671,961	0.2%	Rank history: not on the FY2021–FY2022 lists, #26 in FY2023, #36 in FY2024 and #45 in FY2025; down 13 since Jul 2024–Jun 2025.
55	General Electric Company 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)	$35,721,877	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
56	Four Points Technology, L.L.C. Top NAICS codes 541519 Other Computer Related Services	$35,536,741	0.2%	Rank history: #89 in FY2021, #92 in FY2022, #62 in FY2023, #44 in FY2024 and #52 in FY2025; unchanged since Jul 2024–Jun 2025.
57	United Launch Alliance, L.L.C. Through United Launch Services, LLC Top NAICS codes 336415 Guided Missile and Space Vehicle Propulsion Unit and Propulsion Unit Parts Manufacturing 481212 Nonscheduled Chartered Freight Air Transportation	$35,416,931	0.2%	Rank history: not on the FY2021–FY2023 lists, #61 in FY2024 and not on the FY2025 list; up 1 since Jul 2024–Jun 2025.
58	Minburn Technology Group, LLC Top NAICS codes 541519 Other Computer Related Services	$33,597,483	0.2%	Rank history: not on the FY2021–FY2022 lists, #56 in FY2023, #51 in FY2024 and #51 in FY2025; down 9 since Jul 2024–Jun 2025.
59	PCI Productions LLC Top NAICS codes 541820 Public Relations Agencies 561110 Office Administrative Services	$33,113,639	0.2%	Rank history: not on the FY2021–FY2023 lists, #65 in FY2024 and #53 in FY2025; up 2 since Jul 2024–Jun 2025.
60	Hitt Contracting, Inc. Top NAICS codes 236210 Industrial Building Construction	$30,259,198	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
61	Katalyst Space Technologies, LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$29,949,767	0.2%	Rank history: not on the FY2021–FY2024 lists and #75 in FY2025; new, not ranked in Jul 2024–Jun 2025.
62	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	$29,721,129	0.2%	Rank history: not on the FY2021 list, #99 in FY2022, not on the FY2023 list, #95 in FY2024 and not on the FY2025 list; up 52 since Jul 2024–Jun 2025.
63	Birmingham Industrial Construction, LLC Top NAICS codes 236210 Industrial Building Construction	$29,424,034	0.2%	Rank history: not on the FY2021–FY2024 lists and #60 in FY2025; up 63 since Jul 2024–Jun 2025.
64	Rocket Lab USA 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)	$26,719,603	0.2%	Rank history: not on the FY2021–FY2025 lists; up 405 since Jul 2024–Jun 2025.
65	Countertrade Products, Inc. Top NAICS codes 334111 Electronic Computer Manufacturing 541519 Other Computer Related Services	$25,432,941	0.2%	Rank history: not on the FY2021–FY2025 lists; up 248 since Jul 2024–Jun 2025.
66	Linde Engineering North America LLC Top NAICS codes 325120 Industrial Gas Manufacturing 333415 Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing	$24,494,000	0.2%	Rank history: not on the FY2021–FY2025 lists; up 426 since Jul 2024–Jun 2025.
67	Analytical Mechanics Associates Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$24,410,162	0.2%	Rank history: not on the FY2021–FY2022 lists, #93 in FY2023, #88 in FY2024 and #55 in FY2025; unchanged since Jul 2024–Jun 2025.
68	OPR LLC Top NAICS codes 541330 Engineering Services	$24,149,395	0.2%	Rank history: #59 in FY2021, #62 in FY2022, #60 in FY2023, #60 in FY2024 and #59 in FY2025; down 6 since Jul 2024–Jun 2025.
69	University of California, LOS Angeles 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	$23,872,392	0.1%	Rank history: not on the FY2021–FY2024 lists and #79 in FY2025; up 20 since Jul 2024–Jun 2025.
70	University of Maryland Baltimore County Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$23,069,694	0.1%	Rank history: not on the FY2021–FY2024 lists and #48 in FY2025; down 18 since Jul 2024–Jun 2025.
71	Healtheon, Inc. Top NAICS codes 236210 Industrial Building Construction	$23,042,928	0.1%	Rank history: #74 in FY2021, #33 in FY2022, #49 in FY2023, #76 in FY2024 and #86 in FY2025; down 12 since Jul 2024–Jun 2025.
72	HX5 LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$22,528,615	0.1%	Rank history: not on the FY2021–FY2025 lists; up 104 since Jul 2024–Jun 2025.
73	Colsa Corp Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$22,420,359	0.1%	Rank history: #53 in FY2021, #65 in FY2022, not on the FY2023 list, #64 in FY2024 and #63 in FY2025; down 10 since Jul 2024–Jun 2025.
74	Bay Area Environmental Research Institute	$22,418,098	0.1%	Rank history: #76 in FY2021, #79 in FY2022, #84 in FY2023, #66 in FY2024 and #64 in FY2025; down 6 since Jul 2024–Jun 2025.
75	Bastion Technologies, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541690 Other Scientific and Technical Consulting Services	$22,001,882	0.1%	Rank history: #47 in FY2021, #45 in FY2022, #45 in FY2023, #54 in FY2024 and #46 in FY2025; down 28 since Jul 2024–Jun 2025.
76	Trax International Corporation Top NAICS codes 561210 Facilities Support Services	$21,900,799	0.1%	Rank history: #43 in FY2021, #37 in FY2022, #48 in FY2023, #57 in FY2024 and #61 in FY2025; down 21 since Jul 2024–Jun 2025.
77	Potomac Electric Power Co Top NAICS codes 221118 Other Electric Power Generation	$21,799,188	0.1%	Rank history: not on the FY2021–FY2025 lists; up 28 since Jul 2024–Jun 2025.
78	CGI Federal Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$21,565,161	0.1%	Rank history: not on the FY2021–FY2024 lists and #50 in FY2025; up 40 since Jul 2024–Jun 2025.
79	Tetra Tech, Inc. 2 awardees Top NAICS codes 541620 Environmental Consulting Services	$21,478,394	0.1%	Rank history: not on the FY2021–FY2024 lists and #73 in FY2025; up 20 since Jul 2024–Jun 2025.
80	Barrios Technology, LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$21,343,938	0.1%	Rank history: #36 in FY2021, #31 in FY2022, #36 in FY2023, #30 in FY2024 and #42 in FY2025; down 46 since Jul 2024–Jun 2025.
81	1 - 8A Iso9001 Fedsync-Bfs, LLC Top NAICS codes 561110 Office Administrative Services	$21,296,424	0.1%	Rank history: not on the FY2021–FY2025 lists; up 70 since Jul 2024–Jun 2025.
82	Techtrans International Inc. Top NAICS codes 541930 Translation and Interpretation Services 493110 General Warehousing and Storage	$21,129,990	0.1%	Rank history: #72 in FY2021, #72 in FY2022, #80 in FY2023, #84 in FY2024 and #71 in FY2025; up 1 since Jul 2024–Jun 2025.
83	The Southern Company 3 awardees, including Mississippi Power Co and Virginia Natural Gas, Inc. Top NAICS codes 221122 Electric Power Distribution 221210 Natural Gas Distribution 238210 Electrical Contractors and Other Wiring Installation Contractors	$20,984,069	0.1%	Rank history: not on the FY2021–FY2025 lists; up 375 since Jul 2024–Jun 2025.
84	Creare LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541713 Research and Development in Nanotechnology 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)	$20,287,211	0.1%	Rank history: not on the FY2021–FY2024 lists and #74 in FY2025; up 72 since Jul 2024–Jun 2025.
85	Messer North America Inc. Through Messer LLC Top NAICS codes 325120 Industrial Gas Manufacturing	$20,033,178	0.1%	Rank history: not on the FY2021–FY2024 lists and #72 in FY2025; down 4 since Jul 2024–Jun 2025.
86	Erie Affiliates Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction	$19,620,255	0.1%	Rank history: not on the FY2021–FY2022 lists, #92 in FY2023 and not on the FY2024–FY2025 lists; up 79 since Jul 2024–Jun 2025.
87	Maclean Engineering & Applied Technologies L.L.C. Top NAICS codes 541511 Custom Computer Programming Services	$19,557,358	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
88	Aleut Construction LLC Top NAICS codes 236220 Commercial and Institutional Building Construction	$19,034,014	0.1%	Rank history: not on the FY2021–FY2025 lists; up 145 since Jul 2024–Jun 2025.
89	Tesla Laboratories Inc. Top NAICS codes 541330 Engineering Services	$18,976,187	0.1%	Rank history: not on the FY2021–FY2025 lists; up 212 since Jul 2024–Jun 2025.
90	Nana Regional Corporation, Inc. 2 awardees, including Akima Global Logistics, LLC and Affigent, LLC Top NAICS codes 561210 Facilities Support Services 541519 Other Computer Related Services	$18,458,272	0.1%	Rank history: not on the FY2021–FY2024 lists and #98 in FY2025; up 151 since Jul 2024–Jun 2025.
91	The University of Iowa Top NAICS codes 541713 Research and Development in Nanotechnology	$18,296,030	0.1%	Rank history: not on the FY2021 list, #19 in FY2022, not on the FY2023–FY2024 lists and #62 in FY2025; down 18 since Jul 2024–Jun 2025.
92	Honeybee Robotics LLC Top NAICS codes 541330 Engineering Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 336414 Guided Missile and Space Vehicle Manufacturing	$18,215,723	0.1%	Rank history: not on the FY2021–FY2024 lists and #68 in FY2025; unchanged since Jul 2024–Jun 2025.
93	Diversified Construction of Oklahoma, Inc. Top NAICS codes 236210 Industrial Building Construction	$17,578,700	0.1%	Rank history: not on the FY2021–FY2023 lists, #63 in FY2024 and not on the FY2025 list; down 33 since Jul 2024–Jun 2025.
94	Ares Technical Services Corporation Top NAICS codes 541330 Engineering Services	$17,479,297	0.1%	Rank history: not on the FY2021–FY2023 lists, #91 in FY2024 and not on the FY2025 list; down 1 since Jul 2024–Jun 2025.
95	The Timken Company 2 awardees, including CGI Federal Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$17,288,428	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
96	UEI NVJ3APL7YKL3 Top NAICS codes 336414 Guided Missile and Space Vehicle Manufacturing	$17,258,370	0.1%	Rank history: not on the FY2021–FY2022 lists, #75 in FY2023 and not on the FY2024–FY2025 lists; up 118 since Jul 2024–Jun 2025.
97	Coldquanta Inc. Through Infleqtion Quantum, LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$17,019,904	0.1%	Rank history: not on the FY2021–FY2024 lists and #89 in FY2025; up 173 since Jul 2024–Jun 2025.
98	Catholic University of America (The)	$16,882,509	0.1%	Rank history: #86 in FY2021, not on the FY2022 list, #94 in FY2023, #87 in FY2024 and #70 in FY2025; down 19 since Jul 2024–Jun 2025.
99	Mccallie Associates, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$15,968,923	0.1%	Rank history: not on the FY2021–FY2023 lists, #71 in FY2024 and #77 in FY2025; down 22 since Jul 2024–Jun 2025.
100	Regents of the University of Michigan Top NAICS codes 336419 Other Guided Missile and Space Vehicle Parts and Auxiliary Equipment Manufacturing 541713 Research and Development in Nanotechnology 541330 Engineering Services	$15,966,580	0.1%	Rank history: #98 in FY2021, not on the FY2022 list, #99 in FY2023, #93 in FY2024 and #78 in FY2025; down 9 since Jul 2024–Jun 2025.

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100 of 2,370 contractors listed here. See the rest on GovTribe.

How this ranking works

Source: every contract action FPDS records (as published on SAM.gov) in the period, as GovTribe received it.
Amounts are net obligations: what was obligated, less what was deobligated. Shares are of $16.1 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 National Aeronautics and Space Administration contractors in Jul 2025–Jun 2026?

1. California Institute of Technology ($2.29B), 2. The Boeing Company ($1.35B), 3. Space Exploration Technologies Corp. ($869M), 4. Blue Origin Washington, LLC ($632M), 5. Northrop Grumman Systems Corporation ($530M), 6. Johns Hopkins University ($465M), 7. Amentum Holdings, Inc. ($435M), 8. Peraton Inc. ($411M), 9. Lockheed Martin Corporation ($376M), 10. KBR Wyle Services LLC ($367M).

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