Top 100 Defense Counterintelligence and Security Agency Contractors, FY2021

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	CACI International Inc. 2 awardees, including Caci Premier Technology, LLC and Caci, Inc. - Federal Top NAICS codes 561611 Investigation and Personal Background Check Services 541511 Custom Computer Programming Services	$226,183,512	22.9%	Rank history: #3 in FY2022, #2 in FY2023, #1 in FY2024 and #2 in FY2025; up 1 since FY2020.
2	Perspecta Inc. 2 awardees, including Peraton Risk Decision Inc. and Peraton Enterprise Solutions LLC Top NAICS codes 561611 Investigation and Personal Background Check Services 541512 Computer Systems Design Services	$195,564,810	19.8%	Rank history: not on the FY2022–FY2025 lists; down 1 since FY2020.
3	Securitas AB Through Securitas Critical Infrastructure Services, Inc. Top NAICS codes 561611 Investigation and Personal Background Check Services	$87,059,784	8.8%	Rank history: #4 in FY2022 and not on the FY2023–FY2025 lists; up 2 since FY2020.
4	Deloitte LLP 2 awardees, including Deloitte Consulting LLP Top NAICS codes 541512 Computer Systems Design Services	$71,915,475	7.3%	Rank history: #1 in FY2022, #12 in FY2023 and not on the FY2024–FY2025 lists; down 1 since FY2020.
5	Asrc Federal Professional Services, LLC Top NAICS codes 561611 Investigation and Personal Background Check Services	$71,813,085	7.3%	Rank history: #8 in FY2022, #9 in FY2023 and not on the FY2024–FY2025 lists; up 1 since FY2020.
6	Kpmg L.L.P. Top NAICS codes 541211 Offices of Certified Public Accountants 541611 Administrative Management and General Management Consulting Services	$25,864,050	2.6%	Rank history: #5 in FY2022, #6 in FY2023, #8 in FY2024 and #13 in FY2025; new, not ranked in FY2020.
7	Nana Regional Corporation Inc 5 awardees, including Rivertech LLC, Ikun LLC and Cloud Lake Technology LLC Top NAICS codes 561611 Investigation and Personal Background Check Services 541519 Other Computer Related Services 541512 Computer Systems Design Services	$23,650,642	2.4%	Rank history: #9 in FY2022, #36 in FY2023 and not on the FY2024–FY2025 lists; up 2 since FY2020.
8	Verato, Inc. Top NAICS codes 541219 Other Accounting Services	$21,525,867	2.2%	Rank history: #11 in FY2022, #10 in FY2023, #18 in FY2024 and #70 in FY2025; unchanged since FY2020.
9	Broadleaf, Inc. Top NAICS codes 541513 Computer Facilities Management Services 541512 Computer Systems Design Services 541611 Administrative Management and General Management Consulting Services	$17,591,922	1.8%	Rank history: #15 in FY2022, #87 in FY2023 and not on the FY2024–FY2025 lists; up 3 since FY2020.
10	Carahsoft Technology Corp Top NAICS codes 511210 Software Publishers 541519 Other Computer Related Services	$16,825,914	1.7%	Rank history: #7 in FY2022, #4 in FY2023, #9 in FY2024 and #5 in FY2025; up 20 since FY2020.
11	Iworks Corp Top NAICS codes 561611 Investigation and Personal Background Check Services	$16,686,139	1.7%	Rank history: #13 in FY2022, not on the FY2023 list, #15 in FY2024 and #8 in FY2025; new, not ranked in FY2020.
12	Sierra Nevada Company, LLC Top NAICS codes 511210 Software Publishers	$13,461,268	1.4%	Rank history: #17 in FY2022, #11 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
13	Dynanet Corporation Top NAICS codes 541511 Custom Computer Programming Services	$12,836,606	1.3%	Rank history: #16 in FY2022, #20 in FY2023, #35 in FY2024 and #38 in FY2025; up 34 since FY2020.
14	Metis Celestar JV LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$11,985,226	1.2%	Rank history: #12 in FY2022, #16 in FY2023, #21 in FY2024 and #63 in FY2025; up 1 since FY2020.
15	Global Connections To Employment, Inc. Top NAICS codes 541512 Computer Systems Design Services 541990 All Other Professional, Scientific, and Technical Services	$10,850,459	1.1%	Rank history: #14 in FY2022, #23 in FY2023, #11 in FY2024 and #30 in FY2025; up 14 since FY2020.
16	Reed Elsevier Inc. Through Relx Inc. Top NAICS codes 511120 Periodical Publishers	$9,262,753	0.9%	Rank history: #18 in FY2022 and not on the FY2023–FY2025 lists; down 5 since FY2020.
17	Sayres and Associates LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$7,769,606	0.8%	Rank history: #19 in FY2022 and not on the FY2023–FY2025 lists; down 7 since FY2020.
18	Advanced Technology Systems Inc. Through Salient Federal-Sgis Inc. Top NAICS codes 541519 Other Computer Related Services	$7,553,648	0.8%	Rank history: not on the FY2022 list, #21 in FY2023, #64 in FY2024 and not on the FY2025 list; up 6 since FY2020.
19	Fivecast PTY Ltd 2 awardees	$6,675,989	0.7%	Rank history: #43 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
20	Novetta Solutions, LLC Through Accenture Federal Services LLC Top NAICS codes 541512 Computer Systems Design Services	$6,346,774	0.6%	Rank history: not on the FY2022–FY2025 lists; down 7 since FY2020.
21	Rbr-Technologies, Inc. Top NAICS codes 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services	$6,031,924	0.6%	Rank history: #53 in FY2022, #68 in FY2023 and not on the FY2024–FY2025 lists; up 2 since FY2020.
22	The Mitre Corporation Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$5,795,064	0.6%	Rank history: #39 in FY2022, #5 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
23	Minburn Technology Group, LLC Top NAICS codes 511210 Software Publishers	$4,908,367	0.5%	Rank history: #24 in FY2022, #33 in FY2023, #23 in FY2024 and #14 in FY2025; new, not ranked in FY2020.
24	Frontier Inc. Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$4,892,962	0.5%	Rank history: #42 in FY2022, #37 in FY2023, #34 in FY2024 and #19 in FY2025; down 3 since FY2020.
25	International Business Machines Corporation Top NAICS codes 541511 Custom Computer Programming Services	$4,878,956	0.5%	Rank history: #23 in FY2022, #31 in FY2023, #38 in FY2024 and #24 in FY2025; new, not ranked in FY2020.
26	SJ Tech LLC Top NAICS codes 541512 Computer Systems Design Services	$4,851,937	0.5%	Rank history: #26 in FY2022, #35 in FY2023, #54 in FY2024 and not on the FY2025 list; up 13 since FY2020.
27	Team Carney, Inc. Top NAICS codes 611430 Professional and Management Development Training	$4,798,646	0.5%	Rank history: #29 in FY2022, #24 in FY2023, #17 in FY2024 and #15 in FY2025; down 8 since FY2020.
28	A3 Consulting LLC Top NAICS codes 541511 Custom Computer Programming Services	$4,755,850	0.5%	Rank history: #25 in FY2022, #30 in FY2023 and not on the FY2024–FY2025 lists; up 12 since FY2020.
29	Nova-Dine LLC Through DDC It Services LLC Top NAICS codes 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services	$4,721,946	0.5%	Rank history: #10 in FY2022, #17 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
30	Goldbelt Nighthawk, LLC Top NAICS codes 541519 Other Computer Related Services	$4,444,317	0.4%	Rank history: #28 in FY2022, #52 in FY2023, #29 in FY2024 and #58 in FY2025; down 4 since FY2020.
31	Enlightened, Inc. Top NAICS codes 541512 Computer Systems Design Services	$3,990,250	0.4%	Rank history: #31 in FY2022, #38 in FY2023, #42 in FY2024 and #47 in FY2025; up 54 since FY2020.
32	Cbeyondata LLC Top NAICS codes 541511 Custom Computer Programming Services	$3,017,256	0.3%	Rank history: #50 in FY2022 and not on the FY2023–FY2025 lists; up 1 since FY2020.
33	Keystone Vocational Services Inc. Top NAICS codes 561499 All Other Business Support Services	$2,967,251	0.3%	Rank history: #38 in FY2022, #40 in FY2023, #47 in FY2024 and #45 in FY2025; down 11 since FY2020.
34	ICF International, Inc. Through ICF Incorporated, L.L.C. Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$2,735,777	0.3%	Rank history: #56 in FY2022 and not on the FY2023–FY2025 lists; down 9 since FY2020.
35	HP Enterprise Services LLC 2 awardees, including Peraton Enterprise Solutions LLC Top NAICS codes 541512 Computer Systems Design Services	$2,575,003	0.3%	Rank history: #2 in FY2022, #1 in FY2023, #4 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
36	Manta Group LLC Top NAICS codes 541330 Engineering Services	$2,539,288	0.3%	Rank history: #34 in FY2022, #41 in FY2023, #48 in FY2024 and #39 in FY2025; up 16 since FY2020.
37	Revolutional, LLC Top NAICS codes 541511 Custom Computer Programming Services	$2,114,931	0.2%	Rank history: #41 in FY2022, #47 in FY2023, #70 in FY2024 and #48 in FY2025; up 1 since FY2020.
38	Business Enabled Acquisition and Technology, Inc. Top NAICS codes 541512 Computer Systems Design Services	$1,986,149	0.2%	Rank history: #55 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
39	Martek Global Services, Inc. Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$1,982,989	0.2%	Rank history: #48 in FY2022 and not on the FY2023–FY2025 lists; up 43 since FY2020.
40	Celerity Government Solutions LLC Top NAICS codes 561611 Investigation and Personal Background Check Services 541611 Administrative Management and General Management Consulting Services	$1,892,099	0.2%	Rank history: #89 in FY2022, #99 in FY2023 and not on the FY2024–FY2025 lists; down 26 since FY2020.
41	Kbr, Inc. Through Dependable Global Solutions, LLC Top NAICS codes 541512 Computer Systems Design Services 541611 Administrative Management and General Management Consulting Services	$1,837,464	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
42	Rockwood Company LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$1,807,573	0.2%	Rank history: #30 in FY2022, #46 in FY2023, #67 in FY2024 and #54 in FY2025; down 11 since FY2020.
43	Infotek Systems and Solutions Inc. Top NAICS codes 561621 Security Systems Services (except Locksmiths)	$1,674,550	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
44	At&T Inc. 2 awardees, including At&T Mobility National Accounts LLC and At&T Enterprises, LLC Top NAICS codes 517312 Wireless Telecommunications Carriers (except Satellite) 517110 Wired Telecommunications Carriers	$1,662,908	0.2%	Rank history: #52 in FY2022, #53 in FY2023, #65 in FY2024 and #72 in FY2025; up 11 since FY2020.
45	Goodwill Commercial Services, Inc. Top NAICS codes 561720 Janitorial Services	$1,598,151	0.2%	Rank history: #54 in FY2022, #55 in FY2023, #100 in FY2024 and #96 in FY2025; down 8 since FY2020.
46	SHI International Corp Top NAICS codes 334113 Computer Terminal Manufacturing	$1,586,348	0.2%	Rank history: not on the FY2022–FY2025 lists; up 8 since FY2020.
47	R3 Government Solutions, LLC Top NAICS codes 541612 Human Resources Consulting Services	$1,524,650	0.2%	Rank history: #36 in FY2022, #42 in FY2023, #50 in FY2024 and #43 in FY2025; new, not ranked in FY2020.
48	Equifax Inc. Through Equifax Workforce Solutions LLC Top NAICS codes 561611 Investigation and Personal Background Check Services	$1,477,079	0.1%	Rank history: #59 in FY2022, #49 in FY2023 and not on the FY2024–FY2025 lists; down 20 since FY2020.
49	Global Skills Exchange Corporation Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$1,411,855	0.1%	Rank history: #51 in FY2022, #64 in FY2023, #84 in FY2024 and not on the FY2025 list; down 8 since FY2020.
50	Techguard Security LLC Top NAICS codes 541512 Computer Systems Design Services	$1,407,100	0.1%	Rank history: not on the FY2022–FY2025 lists; down 23 since FY2020.
51	Guardian Defense Group, Inc. Top NAICS codes 561611 Investigation and Personal Background Check Services	$1,227,685	0.1%	Rank history: #57 in FY2022 and not on the FY2023–FY2025 lists; up 6 since FY2020.
52	Mckinsey & Company, Inc. Through Mckinsey & Company, Inc. Washington D.c. Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$1,225,000	0.1%	Rank history: #69 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
53	C2 Technologies, Inc. Top NAICS codes 611430 Professional and Management Development Training	$1,199,623	0.1%	Rank history: not on the FY2022–FY2025 lists; down 10 since FY2020.
54	Purdy Group LLC Top NAICS codes 561210 Facilities Support Services	$1,167,405	0.1%	Rank history: #99 in FY2022, #77 in FY2023, #80 in FY2024 and #85 in FY2025; down 8 since FY2020.
55	Afognak Native Corporation Through Alutiiq Advanced Security Solutions LLC Top NAICS codes 561612 Security Guards and Patrol Services	$1,120,855	0.1%	Rank history: not on the FY2022–FY2025 lists; down 5 since FY2020.
56	Inquiries Inc. Top NAICS codes 561611 Investigation and Personal Background Check Services	$1,087,435	0.1%	Rank history: not on the FY2022–FY2025 lists; up 15 since FY2020.
57	Organizational Development Resource Group, LLC Top NAICS codes 611430 Professional and Management Development Training	$884,224	0.1%	Rank history: #80 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
58	Pat V Mack Inc. Top NAICS codes 541512 Computer Systems Design Services	$879,851	0.1%	Rank history: #61 in FY2022 and not on the FY2023–FY2025 lists; down 10 since FY2020.
59	Software Information Resource Corp. Top NAICS codes 541519 Other Computer Related Services	$772,169	0.1%	Rank history: #65 in FY2022 and not on the FY2023–FY2025 lists; down 3 since FY2020.
60	Four LLC Top NAICS codes 541519 Other Computer Related Services 511210 Software Publishers	$765,358	0.1%	Rank history: #70 in FY2022, #73 in FY2023, #78 in FY2024 and #98 in FY2025; new, not ranked in FY2020.
61	Center for Creative Leadership Top NAICS codes 611430 Professional and Management Development Training	$725,534	0.1%	Rank history: #82 in FY2022, #57 in FY2023, #60 in FY2024 and #65 in FY2025; up 5 since FY2020.
62	Sei Group Inc. Top NAICS codes 541512 Computer Systems Design Services	$657,476	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
63	National Student Clearinghouse Top NAICS codes 519130 Internet Publishing and Broadcasting and Web Search Portals	$639,600	0.1%	Rank history: #27 in FY2022, #32 in FY2023, #37 in FY2024 and #32 in FY2025; down 45 since FY2020.
64	Cartridge Technologies, LLC Top NAICS codes 811212 Computer and Office Machine Repair and Maintenance	$632,925	0.1%	Rank history: not on the FY2022–FY2025 lists; down 6 since FY2020.
65	Goldbelt, Incorporated Through Peregrine Technical Solutions, LLC Top NAICS codes 541513 Computer Facilities Management Services	$611,907	0.1%	Rank history: not on the FY2022–FY2025 lists; down 49 since FY2020.
66	Bloomberg LP 2 awardees, including Bloomberg Finance LP and Bloomberg Industry Group, Inc. Top NAICS codes 519190 All Other Information Services	$610,508	0.1%	Rank history: #60 in FY2022, #61 in FY2023 and not on the FY2024–FY2025 lists; down 5 since FY2020.
67	Iron Mountain Incorporated Through Iron Mountain Information Management LLC Top NAICS codes 238210 Electrical Contractors and Other Wiring Installation Contractors 493110 General Warehousing and Storage 485991 Special Needs Transportation	$567,021	0.1%	Rank history: not on the FY2022–FY2024 lists and #78 in FY2025; up 12 since FY2020.
68	Professional Management Enterprises, Inc. Top NAICS codes 621112 Offices of Physicians, Mental Health Specialists	$517,725	0.1%	Rank history: not on the FY2022–FY2025 lists; up 1 since FY2020.
69	Piton Science & Technology LLC Top NAICS codes 541612 Human Resources Consulting Services	$480,056	<0.1%	Rank history: #79 in FY2022 and not on the FY2023–FY2025 lists; down 4 since FY2020.
70	Steelcase Inc. Top NAICS codes 337214 Office Furniture (except Wood) Manufacturing	$469,981	<0.1%	Rank history: #97 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
71	August Schell Enterprises, Inc. Top NAICS codes 541519 Other Computer Related Services	$458,218	<0.1%	Rank history: #71 in FY2022, #75 in FY2023, #95 in FY2024 and not on the FY2025 list; down 4 since FY2020.
72	Spectrum Solutions Inc. Top NAICS codes 541512 Computer Systems Design Services	$453,501	<0.1%	Rank history: #98 in FY2022, not on the FY2023 list, #96 in FY2024 and not on the FY2025 list; up 4 since FY2020.
73	G2 Global Solutions, LLC Top NAICS codes 541330 Engineering Services	$452,607	<0.1%	Rank history: #49 in FY2022, #59 in FY2023, #72 in FY2024 and not on the FY2025 list; up 11 since FY2020.
74	Skillsoft Corporation Through Skillsoft (Us) LLC Top NAICS codes 511210 Software Publishers	$436,450	<0.1%	Rank history: #81 in FY2022, #88 in FY2023 and not on the FY2024–FY2025 lists; down 11 since FY2020.
75	Accessagility LLC Top NAICS codes 541519 Other Computer Related Services	$435,969	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
76	Cybermedia Technologies, LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$380,463	<0.1%	Rank history: #62 in FY2022 and not on the FY2023–FY2025 lists; down 2 since FY2020.
77	The Lioce Group Inc. Top NAICS codes 333293 Printing Machinery and Equipment Manufacturing	$319,644	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 9 since FY2020.
78	Government Acquisitions LLC Top NAICS codes 541519 Other Computer Related Services	$306,381	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
79	Adnet Systems Inc. Top NAICS codes 541511 Custom Computer Programming Services	$299,988	<0.1%	Rank history: #87 in FY2022, #95 in FY2023 and not on the FY2024–FY2025 lists; up 1 since FY2020.
80	NCS Pearson Inc. Top NAICS codes 611710 Educational Support Services	$296,759	<0.1%	Rank history: #64 in FY2022, #74 in FY2023 and not on the FY2024–FY2025 lists; down 5 since FY2020.
81	National Association for Public Health Statistics and Information Systems, Inc. Top NAICS codes 813920 Professional Organizations	$295,577	<0.1%	Rank history: #84 in FY2022, #89 in FY2023, #87 in FY2024 and #87 in FY2025; down 19 since FY2020.
82	Idemia Identity & Security USA LLC Top NAICS codes 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services	$291,835	<0.1%	Rank history: #86 in FY2022, #78 in FY2023 and not on the FY2024–FY2025 lists; down 9 since FY2020.
83	Datamaxx Group, Inc. Through Datamaxx Applied Technologies, Inc. Top NAICS codes 511210 Software Publishers	$269,909	<0.1%	Rank history: #74 in FY2022, #92 in FY2023 and not on the FY2024–FY2025 lists; down 2 since FY2020.
84	Fedresults, Inc. Top NAICS codes 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services 511210 Software Publishers	$217,084	<0.1%	Rank history: #75 in FY2022, #72 in FY2023, #79 in FY2024 and not on the FY2025 list; up 14 since FY2020.
85	Verint Systems Inc. Through Verint Americas Inc. Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$215,050	<0.1%	Rank history: #68 in FY2022 and not on the FY2023–FY2025 lists; down 15 since FY2020.
86	Electrosoft Services, LLC Top NAICS codes 541330 Engineering Services	$204,425	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
87	Mythics, LLC Through Emergent, LLC Top NAICS codes 511210 Software Publishers	$204,247	<0.1%	Rank history: #72 in FY2022 and not on the FY2023–FY2025 lists; unchanged since FY2020.
88	Frontier Technologies Inc. Top NAICS codes 541519 Other Computer Related Services	$192,585	<0.1%	Rank history: #78 in FY2022, #94 in FY2023 and not on the FY2024–FY2025 lists; up 23 since FY2020.
89	Caspia Technologies Inc. Top NAICS codes 541690 Other Scientific and Technical Consulting Services	$188,500	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
90	National Law Enforcement Telecommunication System (Nlets), Inc. Top NAICS codes 519190 All Other Information Services	$186,432	<0.1%	Rank history: #94 in FY2022, not on the FY2023–FY2024 lists and #100 in FY2025; up 23 since FY2020.
91	Alamo City Engineering Services, Inc. Top NAICS codes 541519 Other Computer Related Services	$186,248	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 2 since FY2020.
92	Fedstore Corporation Top NAICS codes 541519 Other Computer Related Services	$178,120	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 7 since FY2020.
93	Eco-Shred, LLC Top NAICS codes 561990 All Other Support Services	$176,110	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 14 since FY2020.
94	Lumen Technologies, Inc. Through Lumen Technologies Government Solutions, Inc. Top NAICS codes 517311 Wired Telecommunications Carriers	$170,555	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 58 since FY2020.
95	Bestpass Inc. Top NAICS codes 488490 Other Support Activities for Road Transportation	$166,897	<0.1%	Rank history: #93 in FY2022, #98 in FY2023 and not on the FY2024–FY2025 lists; down 17 since FY2020.
96	Integrity Management Consulting, Inc. Through MHM Innovations, Inc. Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$165,394	<0.1%	Rank history: #95 in FY2022, #76 in FY2023, #82 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
97	Skopenow Inc. Top NAICS codes 519130 Internet Publishing and Broadcasting and Web Search Portals	$150,000	<0.1%	Rank history: #90 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
98	Thomson Reuters (Tax & Accounting) Inc. Through West Publishing Corporation Top NAICS codes 519130 Internet Publishing and Broadcasting and Web Search Portals 519190 All Other Information Services	$142,805	<0.1%	Rank history: #88 in FY2022, #96 in FY2023 and not on the FY2024–FY2025 lists; down 6 since FY2020.
99	Levi Ray & Shoup Inc. Top NAICS codes 511210 Software Publishers	$140,141	<0.1%	Rank history: #100 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
100	4 Star Technologies, Inc. Top NAICS codes 541519 Other Computer Related Services	$124,740	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.

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 $990 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 2021 ran Oct 1, 2020 – Sep 30, 2021. 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 FY2020. "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 FY2020 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