Top 100 Contractors in NAICS 541690: Other Scientific and Technical Consulting Services, FY2024

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Lockheed Martin Corporation 7 awardees Top agencies Army (Department of the Army) USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration)	$168,091,655	6.4%	Rank history: #2 in FY2021, #2 in FY2022, #2 in FY2023 and #2 in FY2025; up 1 since FY2023.
2	Kelly Services, Inc. Top agencies HHS (Department of Health and Human Services)	$105,926,727	4.0%	Rank history: not on the FY2021 list, #49 in FY2022, not on the FY2023 list and #4 in FY2025; returned.
3	General Dynamics Corporation 3 awardees, including General Dynamics One Source LLC and General Dynamics Information Technology, Inc. Top agencies USAF (Department of the Air Force) DHS (Department of Homeland Security) HHS (Department of Health and Human Services)	$101,333,740	3.9%	Rank history: #6 in FY2021, #15 in FY2022, #12 in FY2023 and #3 in FY2025; up 9 since FY2023.
4	Ingenesis Inc. Through Kelly Services, Inc. Top agencies HHS (Department of Health and Human Services)	$72,979,427	2.8%	Rank history: #1 in FY2021, #1 in FY2022, #1 in FY2023 and not on the FY2025 list; down 3 since FY2023.
5	Chemonics International, Inc. Top agencies USAID (US Agency for International Development)	$59,271,881	2.3%	Rank history: #84 in FY2021, #17 in FY2022, #5 in FY2023 and #9 in FY2025; unchanged since FY2023.
6	System High Corporation Top agencies DARPA (Defense Advanced Research Projects Agency) MDA (DOD Missile Defense Agency)	$53,259,317	2.0%	Rank history: not on the FY2021 list, #9 in FY2022, #7 in FY2023 and #5 in FY2025; up 1 since FY2023.
7	Parsons Corporation Through Parsons Government Services Inc. Top agencies USAF (Department of the Air Force)	$44,026,204	1.7%	Rank history: not on the FY2021–FY2022 lists, #26 in FY2023 and #1 in FY2025; up 19 since FY2023.
8	Tetra Tech, Inc. 5 awardees, including Tetra TECH ES, Inc. Top agencies USAID (US Agency for International Development) MCC (Millennium Challenge Corporation)	$42,730,658	1.6%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
9	Unwin Co Top agencies DOE (Department of Energy)	$42,405,024	1.6%	Rank history: #10 in FY2021, #7 in FY2022, #6 in FY2023 and #13 in FY2025; down 3 since FY2023.
10	Leidos Holdings, Inc. 5 awardees, including Leidos, Inc. Top agencies NASA (National Aeronautics and Space Administration) WHS (DOD Washington Headquarters Service) USAF (Department of the Air Force)	$41,129,201	1.6%	Rank history: #5 in FY2021, #5 in FY2022, #3 in FY2023 and not on the FY2025 list; down 7 since FY2023.
11	Axle Informatics, LLC 2 awardees Top agencies HHS (Department of Health and Human Services)	$37,034,002	1.4%	Rank history: #57 in FY2021, #13 in FY2022, #9 in FY2023 and #12 in FY2025; down 2 since FY2023.
12	Michael Stapleton Associates, Ltd. Top agencies DOS (Department of State)	$32,079,411	1.2%	Rank history: #7 in FY2021, #16 in FY2022, #14 in FY2023 and #10 in FY2025; up 2 since FY2023.
13	Mantech International Corporation 3 awardees, including Mantech Advanced Systems International, Inc. Top agencies USAF (Department of the Air Force)	$31,492,721	1.2%	Rank history: #4 in FY2021, #4 in FY2022, #8 in FY2023 and #7 in FY2025; down 5 since FY2023.
14	Research Triangle Institute Top agencies USAID (US Agency for International Development) HHS (Department of Health and Human Services) Navy (Department of the Navy)	$29,090,573	1.1%	Rank history: not on the FY2021 list, #65 in FY2022, #30 in FY2023 and #6 in FY2025; up 16 since FY2023.
15	Minatoishi Palumbo Architects, Inc. Top agencies Army (Department of the Army)	$28,712,217	1.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
16	JP Systems, Inc. Top agencies VA (Department of Veterans Affairs)	$27,785,981	1.1%	Rank history: #23 in FY2021, #26 in FY2022, #17 in FY2023 and not on the FY2025 list; up 1 since FY2023.
17	Palladium International LLC Top agencies USAID (US Agency for International Development)	$26,398,754	1.0%	Rank history: #11 in FY2021, #3 in FY2022, #22 in FY2023 and #88 in FY2025; up 5 since FY2023.
18	DAI Global LLC Top agencies USAID (US Agency for International Development)	$26,329,908	1.0%	Rank history: not on the FY2021 list, #72 in FY2022, #58 in FY2023 and not on the FY2025 list; up 40 since FY2023.
19	National Academy of Sciences Top agencies DOE (Department of Energy) Commerce (Department of Commerce) HHS (Department of Health and Human Services)	$26,296,722	1.0%	Rank history: #9 in FY2021, #18 in FY2022, #11 in FY2023 and #59 in FY2025; down 8 since FY2023.
20	KBR Wyle Services LLC 2 awardees, including Dependable Global Solutions, LLC Top agencies DOE (Department of Energy) NASA (National Aeronautics and Space Administration)	$26,121,068	1.0%	Rank history: not on the FY2021–FY2023 lists and #11 in FY2025; new.
21	Janus Research Group, LLC Top agencies Army (Department of the Army)	$25,852,092	1.0%	Rank history: not on the FY2021 list, #20 in FY2022, #18 in FY2023 and #22 in FY2025; down 3 since FY2023.
22	Gap Solutions, Inc. Top agencies HHS (Department of Health and Human Services)	$25,318,747	1.0%	Rank history: not on the FY2021–FY2023 lists and #14 in FY2025; new.
23	Booz Allen Hamilton Holding Corporation Through Booz Allen Hamilton Inc. Top agencies HHS (Department of Health and Human Services)	$23,659,261	0.9%	Rank history: #3 in FY2021, #28 in FY2022, #19 in FY2023 and #16 in FY2025; down 4 since FY2023.
24	Winrock International Institute for Agricultural Development Top agencies USAID (US Agency for International Development)	$22,952,083	0.9%	Rank history: not on the FY2021 list, #93 in FY2022, #96 in FY2023 and not on the FY2025 list; up 72 since FY2023.
25	Hdr, Inc. 2 awardees, including HDR Environmental, Operations and Construction, Inc. Top agencies Navy (Department of the Navy)	$22,590,657	0.9%	Rank history: #29 in FY2021, #45 in FY2022, #49 in FY2023 and #24 in FY2025; up 24 since FY2023.
26	RTX Corporation Through Raytheon Company Top agencies USAF (Department of the Air Force)	$22,466,004	0.9%	Rank history: not on the FY2021–FY2023 lists and #21 in FY2025; new.
27	Essex Management LLC Top agencies HHS (Department of Health and Human Services)	$22,030,069	0.8%	Rank history: #22 in FY2021, #22 in FY2022, #21 in FY2023 and #23 in FY2025; down 6 since FY2023.
28	RMC 2021 LLC Top agencies Navy (Department of the Navy)	$20,672,157	0.8%	Rank history: #39 in FY2021, #11 in FY2022, #15 in FY2023 and #19 in FY2025; down 13 since FY2023.
29	Pundir Group, Inc. Top agencies GSA (General Services Administration) Navy (Department of the Navy) AOUSC (Administrative Office of the U.S. Courts)	$19,608,674	0.7%	Rank history: not on the FY2021 list, #67 in FY2022, #44 in FY2023 and #15 in FY2025; up 15 since FY2023.
30	Yale New Haven Health Services Corporation Top agencies HHS (Department of Health and Human Services)	$17,116,181	0.7%	Rank history: #15 in FY2021, #19 in FY2022, #23 in FY2023 and #30 in FY2025; down 7 since FY2023.
31	Ameresco Inc. 2 awardees, including Ameresco Select, Inc. and Ameresco Federal Solutions, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration)	$16,081,018	0.6%	Rank history: #14 in FY2021, #25 in FY2022, #28 in FY2023 and #20 in FY2025; down 3 since FY2023.
32	Battelle Memorial Institute Top agencies DHS (Department of Homeland Security) HHS (Department of Health and Human Services) Treasury (Department of the Treasury)	$14,594,460	0.6%	Rank history: #33 in FY2021, #31 in FY2022, #40 in FY2023 and #26 in FY2025; up 8 since FY2023.
33	Amentum Holdings, Inc. 2 awardees, including Amentum Services, Inc. Top agencies DOS (Department of State)	$14,230,589	0.5%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
34	Kegman Inc. Top agencies USAF (Department of the Air Force)	$14,149,075	0.5%	Rank history: #69 in FY2021, #54 in FY2022, #35 in FY2023 and #27 in FY2025; up 1 since FY2023.
35	Acumen LLC Top agencies HHS (Department of Health and Human Services)	$14,022,663	0.5%	Rank history: #25 in FY2021, #21 in FY2022, #27 in FY2023 and #58 in FY2025; down 8 since FY2023.
36	Noblis, Inc. Top agencies Army (Department of the Army)	$13,754,705	0.5%	Rank history: #59 in FY2021, #30 in FY2022, #41 in FY2023 and #38 in FY2025; up 5 since FY2023.
37	Digitalis Commons, Inc. Top agencies HHS (Department of Health and Human Services)	$13,633,391	0.5%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 199 since FY2023.
38	Ids International, LLC Top agencies DOS (Department of State)	$13,182,234	0.5%	Rank history: #26 in FY2021, not on the FY2022–FY2023 lists and not on the FY2025 list; returned.
39	ABT Global LLC 2 awardees Top agencies HHS (Department of Health and Human Services) USAID (US Agency for International Development)	$13,039,320	0.5%	Rank history: #41 in FY2021, #27 in FY2022, #55 in FY2023 and not on the FY2025 list; up 16 since FY2023.
40	WSP USA Environment & Infrastructure Inc. Top agencies DHS (Department of Homeland Security)	$12,319,904	0.5%	Rank history: not on the FY2021–FY2023 lists and #17 in FY2025; new.
41	Deloitte 2 awardees, including Deloitte Consulting LLP Top agencies HHS (Department of Health and Human Services) USAID (US Agency for International Development) USTDA (United States Trade and Development Agency)	$11,998,720	0.5%	Rank history: not on the FY2021–FY2023 lists and #18 in FY2025; new.
42	Mathematica Inc. Top agencies HHS (Department of Health and Human Services) MCC (Millennium Challenge Corporation)	$11,880,398	0.5%	Rank history: not on the FY2021–FY2023 lists and #46 in FY2025; new.
43	Technology Security Associates, Inc. Top agencies Navy (Department of the Navy)	$10,628,043	0.4%	Rank history: #67 in FY2021, #60 in FY2022, #64 in FY2023 and #52 in FY2025; up 21 since FY2023.
44	The Johns Hopkins University Applied Physics Laboratory LLC Top agencies USAF (Department of the Air Force) DOS (Department of State)	$10,583,888	0.4%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
45	John Snow, Incorporated Top agencies USAID (US Agency for International Development)	$10,521,776	0.4%	Rank history: not on the FY2021 list, #62 in FY2022, #43 in FY2023 and not on the FY2025 list; down 2 since FY2023.
46	Nana Regional Corporation Inc. 2 awardees, including Akima Data Management LLC and TKC Global Solutions, LLC Top agencies DTRA (Defense Threat Reduction Agency) DOE (Department of Energy)	$10,267,403	0.4%	Rank history: not on the FY2021–FY2023 lists and #25 in FY2025; new.
47	Linxx Global Solutions, LLC Top agencies DOS (Department of State)	$10,111,931	0.4%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
48	CDM Smith Inc Through CDM Federal Programs Corporation Top agencies DHS (Department of Homeland Security)	$9,732,634	0.4%	Rank history: not on the FY2021–FY2022 lists, #29 in FY2023 and not on the FY2025 list; down 19 since FY2023.
49	Accenture Federal Services LLC Top agencies Navy (Department of the Navy) CFTC (Commodity Futures Trading Commission)	$9,336,846	0.4%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
50	National Opinion Research Center Top agencies HHS (Department of Health and Human Services)	$9,157,791	0.3%	Rank history: #64 in FY2021, not on the FY2022 list, #32 in FY2023 and #37 in FY2025; down 18 since FY2023.
51	System One Holdings, LLC Through Gap Solutions, Inc. Top agencies HHS (Department of Health and Human Services)	$9,142,441	0.3%	Rank history: not on the FY2021 list, #48 in FY2022, #20 in FY2023 and not on the FY2025 list; down 31 since FY2023.
52	American Institutes for Research In the Behavioral Sciences Top agencies HHS (Department of Health and Human Services)	$8,835,160	0.3%	Rank history: #95 in FY2021, #78 in FY2022, #70 in FY2023 and #47 in FY2025; up 18 since FY2023.
53	22ND Century Technologies Inc. Top agencies HHS (Department of Health and Human Services)	$8,755,355	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 240 since FY2023.
54	MRIGLOBAL Top agencies HHS (Department of Health and Human Services) DARPA (Defense Advanced Research Projects Agency)	$8,748,400	0.3%	Rank history: not on the FY2021–FY2022 lists, #84 in FY2023 and #45 in FY2025; up 30 since FY2023.
55	Cherokee Insights LLC Top agencies DCSA (Defense Counterintelligence and Security Agency)	$8,641,235	0.3%	Rank history: not on the FY2021–FY2022 lists, #76 in FY2023 and #43 in FY2025; up 21 since FY2023.
56	Mantech Advanced Systems International, Inc. Top agencies USAF (Department of the Air Force)	$8,493,404	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
57	Global Engineering & Technology Inc Top agencies DOE (Department of Energy)	$8,417,561	0.3%	Rank history: not on the FY2021–FY2022 lists, #39 in FY2023 and #51 in FY2025; down 18 since FY2023.
58	W R Systems Ltd. Top agencies Navy (Department of the Navy)	$8,235,581	0.3%	Rank history: #53 in FY2021, not on the FY2022–FY2023 lists and #79 in FY2025; up 43 since FY2023.
59	K2 Group, Inc. Top agencies DTRA (Defense Threat Reduction Agency)	$8,220,200	0.3%	Rank history: #61 in FY2021, #64 in FY2022, not on the FY2023 list and #42 in FY2025; returned.
60	Science Applications International Corporation 4 awardees Top agencies DOT (Department of Transportation)	$8,185,232	0.3%	Rank history: #31 in FY2021, #42 in FY2022, #46 in FY2023 and #39 in FY2025; down 14 since FY2023.
61	Fedwriters, Inc. Top agencies Commerce (Department of Commerce) Navy (Department of the Navy)	$8,181,371	0.3%	Rank history: not on the FY2021 list, #83 in FY2022, #78 in FY2023 and #33 in FY2025; up 17 since FY2023.
62	Chippewa Government Solutions, LLC Top agencies HHS (Department of Health and Human Services)	$8,007,998	0.3%	Rank history: not on the FY2021–FY2022 lists, #47 in FY2023 and #48 in FY2025; down 15 since FY2023.
63	Managed Business Solutions LLC Top agencies DOI (Department of the Interior)	$7,984,399	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
64	Bates White, LLC Top agencies FTC (Federal Trade Commission)	$7,691,335	0.3%	Rank history: not on the FY2021 list, #81 in FY2022, #85 in FY2023 and not on the FY2025 list; up 21 since FY2023.
65	Health Services Holdings Inc. Through Health Services Advisory Group, Inc. Top agencies HHS (Department of Health and Human Services)	$7,421,566	0.3%	Rank history: #32 in FY2021, #43 in FY2022, #31 in FY2023 and not on the FY2025 list; down 34 since FY2023.
66	Tatitlek Government Services, LLC Top agencies DOS (Department of State)	$7,257,276	0.3%	Rank history: not on the FY2021–FY2023 lists and #35 in FY2025; new.
67	Kennell & Associates Inc. Top agencies DHA (Defense Health Agency)	$7,051,393	0.3%	Rank history: #70 in FY2021, #75 in FY2022, #69 in FY2023 and #54 in FY2025; up 2 since FY2023.
68	Serco Inc Top agencies Navy (Department of the Navy)	$6,847,141	0.3%	Rank history: not on the FY2021–FY2022 lists, #59 in FY2023 and not on the FY2025 list; down 9 since FY2023.
69	Northrop Grumman Corporation Through Orbital Sciences LLC Top agencies Navy (Department of the Navy)	$6,752,146	0.3%	Rank history: #44 in FY2021, #70 in FY2022, not on the FY2023 list and not on the FY2025 list; up 58 since FY2023.
70	Space Systems/Loral LLC Through Vantor Services Inc. Top agencies USSOCOM (United States Special Operations Command)	$6,452,369	0.2%	Rank history: #47 in FY2021, #40 in FY2022, #37 in FY2023 and not on the FY2025 list; down 33 since FY2023.
71	CDM Federal Programs Corporation Top agencies DHS (Department of Homeland Security)	$6,393,990	0.2%	Rank history: not on the FY2021–FY2023 lists and #67 in FY2025; new.
72	Bmnt Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$6,167,276	0.2%	Rank history: #82 in FY2021, #71 in FY2022, #100 in FY2023 and not on the FY2025 list; up 28 since FY2023.
73	Kaiva Strategies, LLC Top agencies HHS (Department of Health and Human Services)	$6,096,776	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 69 since FY2023.
74	Swmg Productions Inc. Top agencies Army (Department of the Army)	$6,094,096	0.2%	Rank history: #55 in FY2021, #55 in FY2022, not on the FY2023 list and #49 in FY2025; returned.
75	Tierra Data Inc. Top agencies Navy (Department of the Navy)	$6,023,827	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
76	Chinook Systems Inc. Top agencies WHS (DOD Washington Headquarters Service) Army (Department of the Army) DOI (Department of the Interior)	$6,003,965	0.2%	Rank history: not on the FY2021–FY2023 lists and #55 in FY2025; new.
77	Ho-Chunk Shared Services Company Top agencies USAF (Department of the Air Force)	$5,919,985	0.2%	Rank history: not on the FY2021 list, #84 in FY2022, #86 in FY2023 and not on the FY2025 list; up 9 since FY2023.
78	ACE Info Solutions LLC Through Guidehouse Digital LLC Top agencies HHS (Department of Health and Human Services)	$5,654,106	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
79	S.P. Cramer & Associates, Inc. Top agencies Army (Department of the Army)	$5,591,257	0.2%	Rank history: not on the FY2021–FY2022 lists, #51 in FY2023 and #60 in FY2025; down 28 since FY2023.
80	CCS Associates, Inc. Top agencies HHS (Department of Health and Human Services)	$5,563,263	0.2%	Rank history: #60 in FY2021, #82 in FY2022, #89 in FY2023 and #81 in FY2025; up 9 since FY2023.
81	Goldbelt Professional Services, LLC Top agencies HHS (Department of Health and Human Services)	$5,483,306	0.2%	Rank history: not on the FY2021–FY2023 lists and #28 in FY2025; new.
82	Systex, Inc. Top agencies HHS (Department of Health and Human Services)	$5,481,995	0.2%	Rank history: #79 in FY2021, #89 in FY2022, #79 in FY2023 and #65 in FY2025; down 3 since FY2023.
83	The Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc. Top agencies DHA (Defense Health Agency)	$5,397,041	0.2%	Rank history: not on the FY2021–FY2022 lists, #66 in FY2023 and not on the FY2025 list; down 17 since FY2023.
84	Goldbelt C6, LLC Top agencies HHS (Department of Health and Human Services)	$5,389,434	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
85	Rainmakers Strategic Solutions LLC Top agencies HHS (Department of Health and Human Services)	$5,328,820	0.2%	Rank history: not on the FY2021–FY2023 lists and #71 in FY2025; up 292 since FY2023.
86	Sapper Solutions LLC Top agencies Army (Department of the Army)	$5,250,972	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 42 since FY2023.
87	KSM A&E Federal Group, LLC Top agencies VA (Department of Veterans Affairs)	$5,248,859	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
88	Guidehouse Digital LLC Top agencies HHS (Department of Health and Human Services)	$5,243,699	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
89	Dataconsult-Io LLC Top agencies HHS (Department of Health and Human Services)	$5,242,485	0.2%	Rank history: not on the FY2021 list, #99 in FY2022, #87 in FY2023 and not on the FY2025 list; down 2 since FY2023.
90	Acc3 International Incorporated Top agencies USAF (Department of the Air Force)	$5,237,776	0.2%	Rank history: not on the FY2021–FY2023 lists and #93 in FY2025; new.
91	Tetra TECH ES, Inc. Top agencies USAID (US Agency for International Development)	$5,190,424	0.2%	Rank history: not on the FY2021–FY2023 lists and #8 in FY2025; new.
92	Arctic Slope Regional Corporation 3 awardees, including Broadleaf, Inc. and Asrc Federal Facilities Logistics LLC Top agencies Army (Department of the Army) OSD (Office of the Secretary of Defense) CFTC (Commodity Futures Trading Commission)	$5,188,662	0.2%	Rank history: not on the FY2021–FY2023 lists and #40 in FY2025; up 113 since FY2023.
93	Float Partners LLC Top agencies Commerce (Department of Commerce)	$5,062,898	0.2%	Rank history: not on the FY2021–FY2023 lists and #73 in FY2025; up 41 since FY2023.
94	Kbr, Inc. 2 awardees, including Dependable Global Solutions, LLC and KBR Wyle Services, LLC Top agencies DOE (Department of Energy) NASA (National Aeronautics and Space Administration)	$5,051,685	0.2%	Rank history: #19 in FY2021, #23 in FY2022, #13 in FY2023 and not on the FY2025 list; down 81 since FY2023.
95	Regents of the University of Michigan Top agencies HHS (Department of Health and Human Services) NRC (Nuclear Regulatory Commission)	$5,037,491	0.2%	Rank history: #93 in FY2021, #98 in FY2022, #72 in FY2023 and #99 in FY2025; down 23 since FY2023.
96	The Wright Way Enterprises LLC Top agencies Treasury (Department of the Treasury)	$5,036,376	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 18 since FY2023.
97	Nathan Associates LLC Top agencies USAID (US Agency for International Development)	$4,996,997	0.2%	Rank history: not on the FY2021 list, #53 in FY2022, #48 in FY2023 and #70 in FY2025; down 49 since FY2023.
98	UEI F1D1GLREXKW5 Top agencies Navy (Department of the Navy)	$4,859,721	0.2%	Rank history: #76 in FY2021, #94 in FY2022, #93 in FY2023 and #94 in FY2025; down 5 since FY2023.
99	A.i.s., Inc. Top agencies Commerce (Department of Commerce)	$4,830,087	0.2%	Rank history: #83 in FY2021, not on the FY2022–FY2023 lists and #56 in FY2025; up 12 since FY2023.
100	Mobius Consulting LLC Top agencies MDA (DOD Missile Defense Agency)	$4,803,696	0.2%	Rank history: not on the FY2021–FY2023 lists and #50 in FY2025; new.

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 $2.62 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