Top 100 Contractors in PSC D308: Programming Services, FY2021

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Leidos Holdings, Inc. 6 awardees, including Leidos, Inc. and Leidos Management Systems Designers, Inc. Top agencies DHS (Department of Homeland Security) HHS (Department of Health and Human Services) Treasury (Department of the Treasury)	$117,985,478	9.5%	Rank history: #1 in FY2022, #1 in FY2023, #3 in FY2024 and #4 in FY2025; up 1 since FY2020.
2	Booz Allen Hamilton Holding Corporation 3 awardees, including Booz Allen Hamilton Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DHS (Department of Homeland Security)	$92,034,539	7.4%	Rank history: #2 in FY2022, #8 in FY2023, #35 in FY2024 and not on the FY2025 list; down 1 since FY2020.
3	Maximus Inc. 3 awardees, including Maximus Federal Services, Inc., Maximus Federal Technology Solutions, LLC and Insysco, Inc. Top agencies Treasury (Department of the Treasury) Army (Department of the Army)	$48,735,411	3.9%	Rank history: #7 in FY2022, #3 in FY2023 and not on the FY2024–FY2025 lists; up 1 since FY2020.
4	Insap Services, Inc. Top agencies Army (Department of the Army)	$40,504,265	3.3%	Rank history: #18 in FY2022 and not on the FY2023–FY2025 lists; up 3 since FY2020.
5	International Business Machines Corporation Top agencies Treasury (Department of the Treasury)	$36,803,934	3.0%	Rank history: #8 in FY2022, #7 in FY2023, #7 in FY2024 and not on the FY2025 list; up 3 since FY2020.
6	Research Management Consultants Inc. 2 awardees Top agencies OPM (Office of Personnel Management)	$32,217,050	2.6%	Rank history: #4 in FY2022, #4 in FY2023, #4 in FY2024 and #2 in FY2025; up 6 since FY2020.
7	Northrop Grumman Corporation 2 awardees, including Northrop Grumman Systems Corporation Top agencies Treasury (Department of the Treasury) NGA (Department of Defense National Geospatial Intelligence Agency)	$32,034,987	2.6%	Rank history: #52 in FY2022 and not on the FY2023–FY2025 lists; up 7 since FY2020.
8	Microsoft Corporation Top agencies Army (Department of the Army) DLA (Defense Logistics Agency) DOS (Department of State)	$30,345,015	2.4%	Rank history: #5 in FY2022, #9 in FY2023, #12 in FY2024 and not on the FY2025 list; down 5 since FY2020.
9	Nippon Telegraph and Telephone Corporation Through NTT Data Federal Services, Inc. Top agencies DOJ (Department of Justice)	$27,272,393	2.2%	Rank history: not on the FY2022–FY2025 lists; up 11 since FY2020.
10	Ready Computing Inc. Top agencies VA (Department of Veterans Affairs)	$26,678,756	2.2%	Rank history: #27 in FY2022 and not on the FY2023–FY2025 lists; up 7 since FY2020.
11	General Dynamics Corporation 5 awardees, including General Dynamics Information Technology, Inc. and General Dynamics Mission Systems, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) DOE (Department of Energy)	$25,132,184	2.0%	Rank history: #3 in FY2022, #2 in FY2023, #1 in FY2024 and #1 in FY2025; up 12 since FY2020.
12	Pluribus Digital, Inc. Top agencies DHS (Department of Homeland Security)	$24,535,904	2.0%	Rank history: #6 in FY2022, #10 in FY2023 and not on the FY2024–FY2025 lists; up 10 since FY2020.
13	Maximus Federal Technology Solutions, LLC Top agencies Army (Department of the Army)	$20,169,095	1.6%	Rank history: not on the FY2022–FY2025 lists; up 2 since FY2020.
14	Deloitte LLP Through Deloitte Consulting LLP Top agencies Treasury (Department of the Treasury) HHS (Department of Health and Human Services) DHS (Department of Homeland Security)	$19,307,675	1.6%	Rank history: not on the FY2022–FY2025 lists; up 25 since FY2020.
15	Oakland Consulting Group Inc. Top agencies Army (Department of the Army)	$16,917,759	1.4%	Rank history: #54 in FY2022 and not on the FY2023–FY2025 lists; up 9 since FY2020.
16	TCG Inc. Top agencies EOP (Executive Office of the President)	$16,620,958	1.3%	Rank history: #10 in FY2022, #22 in FY2023 and not on the FY2024–FY2025 lists; up 2 since FY2020.
17	Science Applications International Corporation Top agencies NASA (National Aeronautics and Space Administration) EPA (Environmental Protection Agency) Treasury (Department of the Treasury)	$16,431,354	1.3%	Rank history: #29 in FY2022, #24 in FY2023, #13 in FY2024 and #15 in FY2025; down 7 since FY2020.
18	Pyramid Systems, Inc. Top agencies HUD (Department of Housing and Urban Development)	$15,472,247	1.2%	Rank history: not on the FY2022–FY2025 lists; up 3 since FY2020.
19	RTX Corporation 2 awardees, including RTX BBN Technologies, Inc. and Raytheon Company Top agencies USAF (Department of the Air Force) Commerce (Department of Commerce)	$15,289,598	1.2%	Rank history: #42 in FY2022, #16 in FY2023, #14 in FY2024 and #6 in FY2025; up 83 since FY2020.
20	Appsential LLC Top agencies DOE (Department of Energy)	$14,974,044	1.2%	Rank history: not on the FY2022–FY2025 lists; down 4 since FY2020.
21	Revolutional, LLC Top agencies Commerce (Department of Commerce) DCSA (Defense Counterintelligence and Security Agency) DOS (Department of State)	$14,629,221	1.2%	Rank history: #15 in FY2022, #25 in FY2023, #52 in FY2024 and not on the FY2025 list; down 12 since FY2020.
22	CACI International Inc. 3 awardees, including Caci, Inc. - Federal, R.m. Vredenburg, LLC and Caci-Iss, LLC Top agencies USTRANSCOM (Department of Defense United States Transportation Command) NARA (National Archives and Records Administration) Navy (Department of the Navy)	$13,771,538	1.1%	Rank history: not on the FY2022–FY2025 lists; up 168 since FY2020.
23	Sabel Systems Technology Solutions, LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$12,702,451	1.0%	Rank history: #28 in FY2022, #17 in FY2023, #33 in FY2024 and not on the FY2025 list; up 8 since FY2020.
24	Wakelight Technologies, LLC Top agencies Navy (Department of the Navy)	$11,281,905	0.9%	Rank history: #26 in FY2022 and not on the FY2023–FY2025 lists; up 13 since FY2020.
25	CGI Technologies and Solutions Inc. Through CGI Federal Inc. Top agencies Army (Department of the Army) Treasury (Department of the Treasury)	$11,190,307	0.9%	Rank history: #58 in FY2022 and not on the FY2023–FY2025 lists; up 219 since FY2020.
26	DV United LLC Top agencies HHS (Department of Health and Human Services)	$11,161,446	0.9%	Rank history: #47 in FY2022 and not on the FY2023–FY2025 lists; up 3 since FY2020.
27	Alethix, LLC Top agencies USAF (Department of the Air Force)	$10,762,523	0.9%	Rank history: #21 in FY2022, #13 in FY2023, #18 in FY2024 and not on the FY2025 list; up 9 since FY2020.
28	Accenture Federal Services LLC 3 awardees Top agencies USAF (Department of the Air Force)	$10,096,643	0.8%	Rank history: #9 in FY2022 and not on the FY2023–FY2025 lists; up 13 since FY2020.
29	ICF International, Inc. 2 awardees, including Incentive Technology Group LLC and ICF Incorporated, L.L.C. Top agencies DOS (Department of State) HHS (Department of Health and Human Services)	$9,635,030	0.8%	Rank history: #91 in FY2022 and not on the FY2023–FY2025 lists; up 4 since FY2020.
30	The Boeing Company 2 awardees Top agencies Army (Department of the Army) Navy (Department of the Navy)	$8,828,730	0.7%	Rank history: #19 in FY2022, #12 in FY2023, #9 in FY2024 and not on the FY2025 list; up 2 since FY2020.
31	Mantech International Corporation 2 awardees, including Mantech Mgs, Inc. and Mantech Advanced Systems International, Inc. Top agencies USAF (Department of the Air Force) DOJ (Department of Justice)	$8,713,392	0.7%	Rank history: #16 in FY2022, #20 in FY2023 and not on the FY2024–FY2025 lists; up 24 since FY2020.
32	FU Associates, Ltd. Top agencies HHS (Department of Health and Human Services)	$8,465,521	0.7%	Rank history: not on the FY2022–FY2025 lists; up 8 since FY2020.
33	Linquest Corporation Through The Perduco Group, Inc. Top agencies USAF (Department of the Air Force)	$8,147,579	0.7%	Rank history: not on the FY2022–FY2025 lists; up 39 since FY2020.
34	Omni Fed LLC Top agencies USAF (Department of the Air Force)	$8,088,027	0.7%	Rank history: #17 in FY2022 and not on the FY2023–FY2025 lists; up 25 since FY2020.
35	Lintech Global Inc. Top agencies Army (Department of the Army) Treasury (Department of the Treasury)	$8,069,181	0.7%	Rank history: #20 in FY2022, #19 in FY2023 and not on the FY2024–FY2025 lists; up 132 since FY2020.
36	Datum Software, Inc. Top agencies USAF (Department of the Air Force)	$7,561,449	0.6%	Rank history: #37 in FY2022, #53 in FY2023, #47 in FY2024 and not on the FY2025 list; up 15 since FY2020.
37	Enterprise Resource Planning International, LLC Top agencies USAF (Department of the Air Force)	$7,327,520	0.6%	Rank history: #24 in FY2022, #27 in FY2023, #79 in FY2024 and not on the FY2025 list; up 13 since FY2020.
38	BAE Systems PLC 2 awardees, including BAE Systems Information and Electronic Systems Integration Inc. and BAE Systems Technology Solutions & Services Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$7,240,884	0.6%	Rank history: #43 in FY2022, #100 in FY2023 and not on the FY2024–FY2025 lists; down 13 since FY2020.
39	Interimage, Inc. Top agencies Army (Department of the Army) Treasury (Department of the Treasury)	$6,994,171	0.6%	Rank history: #62 in FY2022, #83 in FY2023 and not on the FY2024–FY2025 lists; up 17 since FY2020.
40	Communications Training Analysis Corporation Top agencies HHS (Department of Health and Human Services) CFTC (Commodity Futures Trading Commission)	$6,590,520	0.5%	Rank history: #63 in FY2022, #57 in FY2023, #37 in FY2024 and not on the FY2025 list; up 25 since FY2020.
41	Advanced Technology Systems Inc. 4 awardees, including Salient Federal-Sgis Inc. Top agencies DCSA (Defense Counterintelligence and Security Agency)	$6,513,164	0.5%	Rank history: not on the FY2022 list, #15 in FY2023 and not on the FY2024–FY2025 lists; up 73 since FY2020.
42	Acuity Inc. Top agencies DHS (Department of Homeland Security) DOJ (Department of Justice)	$6,304,490	0.5%	Rank history: #65 in FY2022 and not on the FY2023–FY2025 lists; up 24 since FY2020.
43	BAE Systems Land & Armaments L.P. 2 awardees, including BAE Systems Technology Solutions & Services Inc. and BAE Systems Information and Electronic Systems Integration Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$6,212,436	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
44	Insignia Technology Services, LLC Top agencies VA (Department of Veterans Affairs)	$5,891,294	0.5%	Rank history: #34 in FY2022 and not on the FY2023–FY2025 lists; up 34 since FY2020.
45	Information Management Services, Inc. Top agencies HHS (Department of Health and Human Services)	$5,874,469	0.5%	Rank history: #12 in FY2022 and not on the FY2023–FY2025 lists; down 40 since FY2020.
46	Leidos, Inc. Top agencies Treasury (Department of the Treasury)	$5,682,747	0.5%	Rank history: not on the FY2022–FY2025 lists; up 21 since FY2020.
47	Ondaro LLC Top agencies USDA (Department of Agriculture)	$5,574,110	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
48	Leidos Management Systems Designers, Inc. Top agencies Treasury (Department of the Treasury)	$5,347,087	0.4%	Rank history: not on the FY2022–FY2025 lists; up 4 since FY2020.
49	Advanced Alliant Solutions Team, Limited Partnership Top agencies Treasury (Department of the Treasury)	$5,245,008	0.4%	Rank history: #41 in FY2022 and not on the FY2023–FY2025 lists; up 44 since FY2020.
50	Digital Management LLC Top agencies OPM (Office of Personnel Management)	$5,220,772	0.4%	Rank history: #33 in FY2022, #18 in FY2023 and not on the FY2024–FY2025 lists; up 19 since FY2020.
51	Horizon Industries, Limited Top agencies DOL (Department of Labor)	$4,636,931	0.4%	Rank history: #31 in FY2022, #21 in FY2023 and not on the FY2024–FY2025 lists; up 43 since FY2020.
52	Robbins-Gioia LLC Top agencies USAF (Department of the Air Force)	$4,548,263	0.4%	Rank history: #13 in FY2022, #11 in FY2023, #8 in FY2024 and #7 in FY2025; up 80 since FY2020.
53	Carahsoft Technology Corp Top agencies Treasury (Department of the Treasury) Army (Department of the Army) HUD (Department of Housing and Urban Development)	$4,382,992	0.4%	Rank history: #14 in FY2022, #90 in FY2023, #54 in FY2024 and not on the FY2025 list; down 42 since FY2020.
54	Cybermedia Technologies, LLC Top agencies OPM (Office of Personnel Management)	$4,378,694	0.4%	Rank history: #30 in FY2022, #67 in FY2023 and not on the FY2024–FY2025 lists; up 50 since FY2020.
55	Alpha Omega Integration LLC Top agencies DOS (Department of State) HUD (Department of Housing and Urban Development)	$4,309,327	0.3%	Rank history: #39 in FY2022, #31 in FY2023, #32 in FY2024 and not on the FY2025 list; up 18 since FY2020.
56	Clarity Innovations LLC Top agencies USAF (Department of the Air Force)	$4,214,126	0.3%	Rank history: #35 in FY2022 and not on the FY2023–FY2025 lists; up 8 since FY2020.
57	Knowledge Management Inc. Top agencies Navy (Department of the Navy)	$4,095,348	0.3%	Rank history: #57 in FY2022 and not on the FY2023–FY2025 lists; up 46 since FY2020.
58	Bixal Solutions Incorporated Top agencies SBA (Small Business Administration) DOJ (Department of Justice) ED (Department of Education)	$4,007,372	0.3%	Rank history: not on the FY2022–FY2025 lists; up 2 since FY2020.
59	Siertek, Ltd. Top agencies USAF (Department of the Air Force)	$3,768,388	0.3%	Rank history: #38 in FY2022, #99 in FY2023 and not on the FY2024–FY2025 lists; up 31 since FY2020.
60	Addx Corporation Top agencies DHS (Department of Homeland Security)	$3,752,723	0.3%	Rank history: not on the FY2022–FY2025 lists; up 32 since FY2020.
61	XL Associates, Inc. Top agencies NARA (National Archives and Records Administration)	$3,705,094	0.3%	Rank history: #61 in FY2022, #35 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
62	Techtrend, Inc. Top agencies USDA (Department of Agriculture)	$3,660,802	0.3%	Rank history: #36 in FY2022, #23 in FY2023, #27 in FY2024 and not on the FY2025 list; unchanged since FY2020.
63	Project Services Group, LLC Top agencies Treasury (Department of the Treasury)	$3,653,024	0.3%	Rank history: not on the FY2022 list, #71 in FY2023 and not on the FY2024–FY2025 lists; up 28 since FY2020.
64	Octo Metric LLC Top agencies USAF (Department of the Air Force)	$3,604,367	0.3%	Rank history: #64 in FY2022 and not on the FY2023–FY2025 lists; up 49 since FY2020.
65	I3 LLC Top agencies DOJ (Department of Justice)	$3,440,384	0.3%	Rank history: not on the FY2022–FY2025 lists; up 187 since FY2020.
66	The Tatitlek Corporation Through Geonorth, LLC Top agencies DOS (Department of State)	$3,440,158	0.3%	Rank history: not on the FY2022–FY2025 lists; up 198 since FY2020.
67	Four Points Technology, L.L.C. Top agencies VA (Department of Veterans Affairs)	$3,372,607	0.3%	Rank history: #44 in FY2022, #14 in FY2023, not on the FY2024 list and #5 in FY2025; up 358 since FY2020.
68	Radiant Infotech, LLC Top agencies HHS (Department of Health and Human Services)	$3,351,818	0.3%	Rank history: #45 in FY2022, #26 in FY2023, #17 in FY2024 and #8 in FY2025; up 134 since FY2020.
69	Fei-Nha, LLC Top agencies HHS (Department of Health and Human Services)	$3,319,562	0.3%	Rank history: #49 in FY2022, #33 in FY2023, #20 in FY2024 and not on the FY2025 list; up 29 since FY2020.
70	Aegis Defense Services LLC Through Crisis24 Inc. Top agencies DHRA (Defense Human Resources Activity)	$3,195,376	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
71	Tista Science and Technology Corporation Top agencies HHS (Department of Health and Human Services) Treasury (Department of the Treasury)	$3,037,611	0.2%	Rank history: not on the FY2022–FY2025 lists; up 25 since FY2020.
72	Skylight Inc. Top agencies USAF (Department of the Air Force) HHS (Department of Health and Human Services)	$2,887,402	0.2%	Rank history: #69 in FY2022, #78 in FY2023 and not on the FY2024–FY2025 lists; up 55 since FY2020.
73	Excella, LLC Top agencies DHS (Department of Homeland Security)	$2,821,470	0.2%	Rank history: #56 in FY2022 and not on the FY2023–FY2025 lists; down 45 since FY2020.
74	Chenega Professional & Technical Services LLC Top agencies DHA (Defense Health Agency)	$2,723,509	0.2%	Rank history: not on the FY2022–FY2025 lists; up 45 since FY2020.
75	VET Advisor LLC Through Three Wire Systems, LLC Top agencies Army (Department of the Army)	$2,646,116	0.2%	Rank history: #55 in FY2022, #38 in FY2023 and not on the FY2024–FY2025 lists; up 35 since FY2020.
76	Swingtech Consulting Inc. Top agencies DODEA (Department of Defense Education Activity)	$2,606,008	0.2%	Rank history: #53 in FY2022, #29 in FY2023, #15 in FY2024 and not on the FY2025 list; up 75 since FY2020.
77	Agiletrailblazers, LLC Top agencies USAF (Department of the Air Force)	$2,589,844	0.2%	Rank history: not on the FY2022–FY2025 lists; up 88 since FY2020.
78	Koniag, Inc. 2 awardees, including Koniag Information Security Services LLC and Koniag Services, Inc. Top agencies DOS (Department of State) HUD (Department of Housing and Urban Development)	$2,476,871	0.2%	Rank history: not on the FY2022–FY2025 lists; up 172 since FY2020.
79	Belcan Government Solutions, Inc. Top agencies Treasury (Department of the Treasury)	$2,409,743	0.2%	Rank history: not on the FY2022–FY2025 lists; up 4 since FY2020.
80	Medidata Solutions Inc. Through Dassault Systemes Americas Corp. Top agencies DOT (Department of Transportation)	$2,286,980	0.2%	Rank history: #76 in FY2022, #44 in FY2023, #61 in FY2024 and not on the FY2025 list; up 277 since FY2020.
81	Usmax Corporation Top agencies USAF (Department of the Air Force)	$2,268,882	0.2%	Rank history: #51 in FY2022, #37 in FY2023, #24 in FY2024 and not on the FY2025 list; up 107 since FY2020.
82	Counterpointe Solutions Inc. Top agencies Treasury (Department of the Treasury)	$2,259,033	0.2%	Rank history: #86 in FY2022 and not on the FY2023–FY2025 lists; up 47 since FY2020.
83	Appddictionstudio Limited Liability Company Top agencies USAF (Department of the Air Force)	$2,166,528	0.2%	Rank history: not on the FY2022–FY2025 lists; up 43 since FY2020.
84	Dpra Incorporated Top agencies USAF (Department of the Air Force)	$2,087,523	0.2%	Rank history: #40 in FY2022, #32 in FY2023 and not on the FY2024–FY2025 lists; up 4 since FY2020.
85	Groundswell Corporation Top agencies ED (Department of Education) DOL (Department of Labor)	$2,076,376	0.2%	Rank history: #70 in FY2022 and not on the FY2023–FY2025 lists; down 9 since FY2020.
86	Stellar Innovations & Solutions Inc. Top agencies USAF (Department of the Air Force)	$2,074,238	0.2%	Rank history: #66 in FY2022 and not on the FY2023–FY2025 lists; up 37 since FY2020.
87	Cormac Corporation Top agencies HHS (Department of Health and Human Services)	$2,072,322	0.2%	Rank history: not on the FY2022–FY2025 lists; up 21 since FY2020.
88	Nana Regional Corporation Inc 2 awardees, including Qivliq Commercial Group LLC and Tuvli LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$2,061,533	0.2%	Rank history: not on the FY2022–FY2025 lists; down 13 since FY2020.
89	Synergy Business Innovation & Solutions Inc. Top agencies DOT (Department of Transportation)	$2,059,224	0.2%	Rank history: #60 in FY2022, #36 in FY2023, #23 in FY2024 and #11 in FY2025; up 29 since FY2020.
90	Dark Wolf Solutions, LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$2,055,514	0.2%	Rank history: not on the FY2022–FY2025 lists; up 22 since FY2020.
91	Cask Technologies, LLC Top agencies Navy (Department of the Navy)	$1,980,125	0.2%	Rank history: not on the FY2022–FY2025 lists; down 56 since FY2020.
92	Humanit Solutions LLC Top agencies USAF (Department of the Air Force)	$1,961,688	0.2%	Rank history: #84 in FY2022, #52 in FY2023 and not on the FY2024–FY2025 lists; up 68 since FY2020.
93	BRZ Inc. Top agencies Navy (Department of the Navy)	$1,931,565	0.2%	Rank history: #96 in FY2022 and not on the FY2023–FY2025 lists; up 13 since FY2020.
94	Appteon, Inc. Top agencies DOL (Department of Labor)	$1,919,356	0.2%	Rank history: not on the FY2022–FY2025 lists; down 24 since FY2020.
95	ASI Government, LLC Top agencies Treasury (Department of the Treasury)	$1,860,000	0.2%	Rank history: not on the FY2022–FY2025 lists; up 136 since FY2020.
96	Raft LLC Top agencies CFPB (Consumer Financial Protection Bureau)	$1,851,151	0.1%	Rank history: not on the FY2022–FY2025 lists; up 52 since FY2020.
97	Ukpeagvik Inupiat Corpor Through Bowhead Professional Solutions LLC Top agencies Army (Department of the Army)	$1,849,935	0.1%	Rank history: not on the FY2022–FY2025 lists; up 263 since FY2020.
98	Deloitte Consulting LLP Top agencies Treasury (Department of the Treasury)	$1,806,732	0.1%	Rank history: not on the FY2022–FY2025 lists; down 92 since FY2020.
99	Makpar Corporation Top agencies Treasury (Department of the Treasury)	$1,774,940	0.1%	Rank history: #83 in FY2022 and not on the FY2023–FY2025 lists; up 32 since FY2020.
100	Nuaxis LLC Top agencies DOI (Department of the Interior)	$1,762,791	0.1%	Rank history: not on the FY2022–FY2025 lists; down 14 since 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 $1.24 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 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