Top 100 National Science Foundation Contractors, FY2025

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Leidos Holdings, Inc. Through Leidos, Inc. Top NAICS codes 561210 Facilities Support Services	$319,931,380	42.2%	Rank history: #1 in FY2021, #1 in FY2022, #1 in FY2023 and #1 in FY2024; unchanged since FY2024.
2	Booz Allen Hamilton Holding Corporation Through Booz Allen Hamilton Inc. Top NAICS codes 541512 Computer Systems Design Services	$50,030,224	6.6%	Rank history: #2 in FY2021, #2 in FY2022, #2 in FY2023 and #2 in FY2024; unchanged since FY2024.
3	Battelle Memorial Institute Top NAICS codes 561210 Facilities Support Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$41,937,124	5.5%	Rank history: #3 in FY2021, #3 in FY2022, #3 in FY2023 and #3 in FY2024; unchanged since FY2024.
4	Directviz Solutions, LLC Top NAICS codes 541511 Custom Computer Programming Services	$22,532,734	3.0%	Rank history: not on the FY2021–FY2022 lists, #9 in FY2023 and #6 in FY2024; up 2 since FY2024.
5	Synectics for Management Decisions, Inc. Top NAICS codes 541512 Computer Systems Design Services 541511 Custom Computer Programming Services	$16,833,078	2.2%	Rank history: #6 in FY2021, #5 in FY2022, #5 in FY2023 and #8 in FY2024; up 3 since FY2024.
6	By Light Professional It Services LLC Top NAICS codes 541512 Computer Systems Design Services	$14,577,753	1.9%	Rank history: #11 in FY2021, #4 in FY2022, #4 in FY2023 and #4 in FY2024; down 2 since FY2024.
7	Semanticbits LLC Through ICF Incorporated, L.L.C. Top NAICS codes 541330 Engineering Services 541611 Administrative Management and General Management Consulting Services	$13,298,114	1.8%	Rank history: not on the FY2021–FY2023 lists and #43 in FY2024; up 36 since FY2024.
8	Spatial Front Inc Top NAICS codes 541511 Custom Computer Programming Services	$11,545,949	1.5%	Rank history: not on the FY2021–FY2023 lists and #12 in FY2024; up 4 since FY2024.
9	Civicactions, Inc. Top NAICS codes 541519 Other Computer Related Services	$10,769,111	1.4%	Rank history: #13 in FY2021, #26 in FY2022, #14 in FY2023 and #18 in FY2024; up 9 since FY2024.
10	Carahsoft Technology Corp Top NAICS codes 541519 Other Computer Related Services 334111 Electronic Computer Manufacturing	$9,798,347	1.3%	Rank history: #60 in FY2021 and not on the FY2022–FY2024 lists; up 143 since FY2024.
11	Pathfinder Aviation LLC Top NAICS codes 481211 Nonscheduled Chartered Passenger Air Transportation	$8,048,163	1.1%	Rank history: not on the FY2021–FY2023 lists and #20 in FY2024; up 9 since FY2024.
12	Kenn Borek Air Ltd Top NAICS codes 481219 Other Nonscheduled Air Transportation	$7,841,542	1.0%	Rank history: #20 in FY2021, #15 in FY2022, #15 in FY2023 and #24 in FY2024; up 12 since FY2024.
13	Anika Systems Incorporated Top NAICS codes 541511 Custom Computer Programming Services 541611 Administrative Management and General Management Consulting Services	$7,744,036	1.0%	Rank history: not on the FY2021–FY2023 lists and #17 in FY2024; up 4 since FY2024.
14	Strategic Communications LLC Top NAICS codes 541519 Other Computer Related Services	$7,237,303	1.0%	Rank history: not on the FY2021–FY2023 lists and #27 in FY2024; up 13 since FY2024.
15	Westat, Inc. 2 awardees, including Insight Policy Research, Inc. Top NAICS codes 541611 Administrative Management and General Management Consulting Services 541990 All Other Professional, Scientific, and Technical Services	$6,927,316	0.9%	Rank history: #9 in FY2021, #12 in FY2022, #55 in FY2023 and not on the FY2024 list; up 136 since FY2024.
16	Accenture Federal Services LLC Top NAICS codes 541512 Computer Systems Design Services	$6,574,814	0.9%	Rank history: not on the FY2021–FY2023 lists and #16 in FY2024; unchanged since FY2024.
17	Research Triangle Institute Top NAICS codes 541611 Administrative Management and General Management Consulting Services 541990 All Other Professional, Scientific, and Technical Services	$6,534,110	0.9%	Rank history: #10 in FY2021, #7 in FY2022, #6 in FY2023 and #5 in FY2024; down 12 since FY2024.
18	Institute for Defense Analyses Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$5,769,512	0.8%	Rank history: #12 in FY2021, #11 in FY2022, #8 in FY2023 and #13 in FY2024; down 5 since FY2024.
19	Criterion Systems, L.L.C. Top NAICS codes 541519 Other Computer Related Services	$4,935,455	0.7%	Rank history: #17 in FY2021, #18 in FY2022, #19 in FY2023 and #23 in FY2024; up 4 since FY2024.
20	National Opinion Research Center Top NAICS codes 541611 Administrative Management and General Management Consulting Services 541990 All Other Professional, Scientific, and Technical Services	$4,653,904	0.6%	Rank history: #92 in FY2021, #37 in FY2022, #10 in FY2023 and #11 in FY2024; down 9 since FY2024.
21	Montage + Magnum, LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services 519290 Web Search Portals and All Other Information Services	$4,572,174	0.6%	Rank history: not on the FY2021–FY2023 lists and #67 in FY2024; up 46 since FY2024.
22	VMD Systems Integrators Inc Top NAICS codes 541512 Computer Systems Design Services	$4,339,694	0.6%	Rank history: not on the FY2021–FY2022 lists, #25 in FY2023 and #38 in FY2024; up 16 since FY2024.
23	Thundercat Technology LLC Top NAICS codes 541519 Other Computer Related Services	$4,339,619	0.6%	Rank history: not on the FY2021–FY2022 lists, #23 in FY2023 and #31 in FY2024; up 8 since FY2024.
24	Federal Management Partners, LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$3,881,261	0.5%	Rank history: #15 in FY2021, #13 in FY2022, #7 in FY2023 and #10 in FY2024; down 14 since FY2024.
25	Three Wire Systems, LLC Top NAICS codes 541519 Other Computer Related Services	$3,870,488	0.5%	Rank history: not on the FY2021–FY2023 lists and #28 in FY2024; up 3 since FY2024.
26	Sri International Top NAICS codes 541611 Administrative Management and General Management Consulting Services 541990 All Other Professional, Scientific, and Technical Services	$3,758,013	0.5%	Rank history: #21 in FY2021, #58 in FY2022, #78 in FY2023 and #41 in FY2024; up 15 since FY2024.
27	Mathematica Inc. Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$3,592,488	0.5%	Rank history: not on the FY2021–FY2024 lists; new.
28	Aptive Resources LLC Top NAICS codes 541613 Marketing Consulting Services	$3,485,304	0.5%	Rank history: not on the FY2021–FY2023 lists and #9 in FY2024; down 19 since FY2024.
29	Penbay Technology Group LLC Top NAICS codes 541512 Computer Systems Design Services	$3,454,854	0.5%	Rank history: not on the FY2021 list, #19 in FY2022, #31 in FY2023 and #22 in FY2024; down 7 since FY2024.
30	Blake Willson Group LLC Top NAICS codes 541211 Offices of Certified Public Accountants 541611 Administrative Management and General Management Consulting Services	$3,190,817	0.4%	Rank history: #85 in FY2021, not on the FY2022 list, #86 in FY2023 and #33 in FY2024; up 3 since FY2024.
31	Creative Business Solutions, Inc. Top NAICS codes 541511 Custom Computer Programming Services 541512 Computer Systems Design Services	$3,146,252	0.4%	Rank history: #27 in FY2021, #16 in FY2022, #17 in FY2023 and #21 in FY2024; down 10 since FY2024.
32	Chainbridge Solutions Incorporated Top NAICS codes 541519 Other Computer Related Services	$3,066,606	0.4%	Rank history: not on the FY2021–FY2022 lists, #29 in FY2023 and #34 in FY2024; up 2 since FY2024.
33	Integrity Management Services Inc. Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$2,914,748	0.4%	Rank history: not on the FY2021 list, #57 in FY2022, #18 in FY2023 and #66 in FY2024; up 33 since FY2024.
34	Heritage Interiors LLC Top NAICS codes 337127 Institutional Furniture Manufacturing 541513 Computer Facilities Management Services	$2,906,162	0.4%	Rank history: not on the FY2021–FY2022 lists, #24 in FY2023 and #35 in FY2024; up 1 since FY2024.
35	Totally Joined for Achieving Collaborative Techniques (Tjfact), LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$2,865,750	0.4%	Rank history: not on the FY2021–FY2022 lists, #51 in FY2023 and #52 in FY2024; up 17 since FY2024.
36	Fedwriters, Inc. Top NAICS codes 541611 Administrative Management and General Management Consulting Services 541512 Computer Systems Design Services	$2,766,047	0.4%	Rank history: #51 in FY2021, #59 in FY2022, #56 in FY2023 and #48 in FY2024; up 12 since FY2024.
37	Strategix Management LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$2,631,414	0.3%	Rank history: #25 in FY2021, #20 in FY2022, #22 in FY2023 and #29 in FY2024; down 8 since FY2024.
38	Lynker Corporation Top NAICS codes 541511 Custom Computer Programming Services	$2,603,796	0.3%	Rank history: #26 in FY2021, #36 in FY2022, #39 in FY2023 and #19 in FY2024; down 19 since FY2024.
39	Metgreen Solutions Inc. Top NAICS codes 541519 Other Computer Related Services	$2,512,670	0.3%	Rank history: not on the FY2021–FY2024 lists; up 194 since FY2024.
40	Fusion Mastech Incorporated Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$2,445,610	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
41	QED Enterprises Inc. Top NAICS codes 541330 Engineering Services	$2,065,890	0.3%	Rank history: #46 in FY2021, not on the FY2022 list, #49 in FY2023 and #59 in FY2024; up 18 since FY2024.
42	Alluvionic Inc. Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$2,008,690	0.3%	Rank history: not on the FY2021–FY2023 lists and #78 in FY2024; up 36 since FY2024.
43	Teledyne Technologies Incorporated Through Teledyne Flir Defense, LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$2,000,101	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
44	University of Maryland, College Park Top NAICS codes 541720 Research and Development in the Social Sciences and Humanities	$2,000,000	0.3%	Rank history: not on the FY2021–FY2022 lists, #100 in FY2023 and #55 in FY2024; up 11 since FY2024.
45	Iridescent Sensors Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$1,999,996	0.3%	Rank history: not on the FY2021–FY2024 lists; up 77 since FY2024.
46	Sweetsense Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$1,998,732	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
47	Geosyntec Consultants, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$1,992,066	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
48	Delta Bravo Artificial Intelligence Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$1,989,583	0.3%	Rank history: not on the FY2021–FY2024 lists; up 81 since FY2024.
49	International Business Machines Corporation Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$1,985,500	0.3%	Rank history: not on the FY2021 list, #85 in FY2022, not on the FY2023 list and #56 in FY2024; up 7 since FY2024.
50	Minburn Technology Group, LLC Top NAICS codes 541519 Other Computer Related Services	$1,961,016	0.3%	Rank history: not on the FY2021–FY2023 lists and #65 in FY2024; up 15 since FY2024.
51	Rei Systems, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$1,899,378	0.3%	Rank history: not on the FY2021 list, #43 in FY2022, #58 in FY2023 and #45 in FY2024; down 6 since FY2024.
52	Unico LLC Top NAICS codes 561210 Facilities Support Services	$1,764,984	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
53	Digital Science & Research Solutions Inc. Top NAICS codes 513210 Software Publishers	$1,748,345	0.2%	Rank history: not on the FY2021–FY2023 lists and #85 in FY2024; up 32 since FY2024.
54	EDJ Associates, Inc. Top NAICS codes 561920 Convention and Trade Show Organizers	$1,686,269	0.2%	Rank history: #36 in FY2021, #32 in FY2022, #38 in FY2023 and #30 in FY2024; down 24 since FY2024.
55	Re3D, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$1,682,187	0.2%	Rank history: not on the FY2021–FY2023 lists and #62 in FY2024; up 7 since FY2024.
56	Genco General Contractors of Puerto Rico Corp. 2 awardees Top NAICS codes 236220 Commercial and Institutional Building Construction 561210 Facilities Support Services	$1,667,066	0.2%	Rank history: not on the FY2021–FY2022 lists, #53 in FY2023 and #49 in FY2024; down 7 since FY2024.
57	GBS Solutions Corp Top NAICS codes 541511 Custom Computer Programming Services 541512 Computer Systems Design Services	$1,653,436	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
58	I Tech AG LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$1,614,870	0.2%	Rank history: not on the FY2021–FY2023 lists and #44 in FY2024; down 14 since FY2024.
59	CMA Technology Inc. Top NAICS codes 541519 Other Computer Related Services	$1,517,964	0.2%	Rank history: #33 in FY2021, #38 in FY2022, #20 in FY2023 and not on the FY2024 list; up 75 since FY2024.
60	Amaze Technologies LLC Top NAICS codes 541330 Engineering Services	$1,512,981	0.2%	Rank history: not on the FY2021 list, #74 in FY2022, #16 in FY2023 and #26 in FY2024; down 34 since FY2024.
61	Nana Regional Corporation, Inc. 2 awardees, including Akima Data Management LLC and Affigent, LLC Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services 541519 Other Computer Related Services	$1,501,806	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
62	Ldss, Inc. Top NAICS codes 611430 Professional and Management Development Training	$1,500,000	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
63	Red Carrot Inc. Top NAICS codes 541613 Marketing Consulting Services	$1,431,793	0.2%	Rank history: #73 in FY2021, #68 in FY2022, #72 in FY2023 and #51 in FY2024; down 12 since FY2024.
64	Gartner, Inc. Top NAICS codes 519290 Web Search Portals and All Other Information Services 541519 Other Computer Related Services	$1,367,095	0.2%	Rank history: not on the FY2021–FY2024 lists; up 44 since FY2024.
65	Agility Technologies Inc. Top NAICS codes 541512 Computer Systems Design Services 541511 Custom Computer Programming Services 541519 Other Computer Related Services	$1,277,595	0.2%	Rank history: #14 in FY2021, #21 in FY2022, #27 in FY2023 and #42 in FY2024; down 23 since FY2024.
66	UIC Science, LLC Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$1,197,610	0.2%	Rank history: not on the FY2021–FY2024 lists; up 129 since FY2024.
67	Raye It Consulting LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$1,175,686	0.2%	Rank history: #55 in FY2021, #72 in FY2022, #85 in FY2023 and #75 in FY2024; up 8 since FY2024.
68	Ebsco Information Services, LLC Top NAICS codes 519290 Web Search Portals and All Other Information Services	$1,065,245	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
69	E.f. Kearney, Limited Through Kearney & Company, P.C. Top NAICS codes 541219 Other Accounting Services 541211 Offices of Certified Public Accountants	$1,064,009	0.1%	Rank history: not on the FY2021–FY2023 lists and #93 in FY2024; up 24 since FY2024.
70	Lumen Technologies Government Solutions, Inc. Top NAICS codes 517110 Wired Telecommunications Carriers	$1,026,172	0.1%	Rank history: not on the FY2021–FY2023 lists and #92 in FY2024; up 22 since FY2024.
71	RP Professional Services, LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$1,000,784	0.1%	Rank history: not on the FY2021–FY2022 lists, #62 in FY2023 and #74 in FY2024; up 3 since FY2024.
72	TSC Management, LLC Top NAICS codes 561499 All Other Business Support Services	$988,238	0.1%	Rank history: not on the FY2021 list, #99 in FY2022 and not on the FY2023–FY2024 lists; up 30 since FY2024.
73	Willmeng Construction Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction	$983,217	0.1%	Rank history: not on the FY2021–FY2023 lists and #7 in FY2024; down 66 since FY2024.
74	EFK Group, Llc. Top NAICS codes 541613 Marketing Consulting Services	$982,954	0.1%	Rank history: #43 in FY2021, #35 in FY2022, #46 in FY2023 and #47 in FY2024; down 27 since FY2024.
75	Electrosoft Services Inc. Top NAICS codes 561210 Facilities Support Services	$965,348	0.1%	Rank history: not on the FY2021–FY2022 lists, #92 in FY2023 and #96 in FY2024; up 21 since FY2024.
76	ICF Macro Inc. Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$928,453	0.1%	Rank history: not on the FY2021–FY2023 lists and #76 in FY2024; unchanged since FY2024.
77	Lord and Tucker Management Consultants, L.L.C. Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$925,029	0.1%	Rank history: not on the FY2021–FY2023 lists and #98 in FY2024; up 21 since FY2024.
78	Soliel LLC Top NAICS codes 541512 Computer Systems Design Services	$918,206	0.1%	Rank history: not on the FY2021–FY2024 lists; up 29 since FY2024.
79	The Building People LLC Top NAICS codes 541512 Computer Systems Design Services	$907,184	0.1%	Rank history: not on the FY2021–FY2022 lists, #76 in FY2023 and #88 in FY2024; up 9 since FY2024.
80	Relx Inc. 3 awardees, including Elsevier Inc. and Lexisnexis Risk Solutions FL Inc. Top NAICS codes 516210 Media Streaming Distribution Services, Social Networks, and Other Media Networks and Content Providers 513210 Software Publishers 519190 All Other Information Services	$880,398	0.1%	Rank history: not on the FY2021–FY2024 lists; up 171 since FY2024.
81	Ventana Productions, Inc. Top NAICS codes 512110 Motion Picture and Video Production	$868,632	0.1%	Rank history: #90 in FY2021, not on the FY2022–FY2023 lists and #99 in FY2024; up 18 since FY2024.
82	Distributed Solutions, Inc. Top NAICS codes 541519 Other Computer Related Services	$855,492	0.1%	Rank history: not on the FY2021 list, #94 in FY2022 and not on the FY2023–FY2024 lists; returned.
83	Ebsco Industries Inc. Top NAICS codes 511130 Book Publishers	$835,109	0.1%	Rank history: #61 in FY2021, #71 in FY2022, #65 in FY2023 and #57 in FY2024; down 26 since FY2024.
84	Priwils Inc. Top NAICS codes 541511 Custom Computer Programming Services	$825,189	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
85	Software Information Resource Corp Top NAICS codes 541519 Other Computer Related Services	$799,671	0.1%	Rank history: not on the FY2021–FY2022 lists, #94 in FY2023 and not on the FY2024 list; up 19 since FY2024.
86	Govsmart, Inc. Top NAICS codes 541519 Other Computer Related Services	$775,243	0.1%	Rank history: #39 in FY2021 and not on the FY2022–FY2024 lists; up 99 since FY2024.
87	Agile Business Concepts LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$753,005	0.1%	Rank history: not on the FY2021 list, #63 in FY2022, #84 in FY2023 and not on the FY2024 list; up 18 since FY2024.
88	Colossal Contracting LLC Top NAICS codes 541519 Other Computer Related Services	$750,888	0.1%	Rank history: not on the FY2021–FY2023 lists and #69 in FY2024; down 19 since FY2024.
89	Lawelawe Technology Services, Inc. Top NAICS codes 561110 Office Administrative Services	$748,566	0.1%	Rank history: not on the FY2021–FY2024 lists; up 27 since FY2024.
90	Prosidian Consulting LLC Top NAICS codes 524292 Pharmacy Benefit Management and Other Third Party Administration of Insurance and Pension Funds	$697,957	0.1%	Rank history: not on the FY2021–FY2024 lists; up 69 since FY2024.
91	Windsor Group LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services 541519 Other Computer Related Services	$684,790	0.1%	Rank history: #22 in FY2021, #17 in FY2022, #44 in FY2023 and #40 in FY2024; down 51 since FY2024.
92	RMA Associates LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$663,345	0.1%	Rank history: not on the FY2021–FY2023 lists and #87 in FY2024; down 5 since FY2024.
93	Widepoint Integrated Solutions Corp Top NAICS codes 517312 Wireless Telecommunications Carriers (except Satellite)	$616,160	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
94	Epic Systems Inc. Top NAICS codes 541511 Custom Computer Programming Services	$602,634	0.1%	Rank history: not on the FY2021–FY2024 lists; up 15 since FY2024.
95	BLH Technologies Inc. Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$562,000	0.1%	Rank history: #63 in FY2021 and not on the FY2022–FY2024 lists; up 22 since FY2024.
96	Regents of the University of Michigan Top NAICS codes 519130 Internet Publishing and Broadcasting and Web Search Portals	$525,514	0.1%	Rank history: #24 in FY2021, not on the FY2022–FY2023 lists and #95 in FY2024; down 1 since FY2024.
97	Enterprise Technology Solutions, Inc. Top NAICS codes 541519 Other Computer Related Services	$524,569	0.1%	Rank history: #99 in FY2021, #76 in FY2022, #83 in FY2023 and #94 in FY2024; down 3 since FY2024.
98	Rape, Abuse and Incest National Network Rainn Top NAICS codes 624190 Other Individual and Family Services	$510,000	0.1%	Rank history: not on the FY2021–FY2024 lists; up 173 since FY2024.
99	Bahfed Corp Top NAICS codes 541519 Other Computer Related Services	$499,181	0.1%	Rank history: #58 in FY2021, #51 in FY2022, #82 in FY2023 and not on the FY2024 list; up 12 since FY2024.
100	Professional Management Consulting Services LLC Top NAICS codes 541512 Computer Systems Design Services	$495,383	0.1%	Rank history: #34 in FY2021, #34 in FY2022, #33 in FY2023 and #25 in FY2024; down 75 since FY2024.

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 $758 million 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 2025 ran Oct 1, 2024 – Sep 30, 2025. 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 FY2024. "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 FY2024 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