Top 100 Contractors in PSC U005: Tuition, Registration, and Membership Fees, FY2021

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	University of San Diego Top agencies Navy (Department of the Navy)	$5,817,890	2.6%	Rank history: #2 in FY2022, #5 in FY2023, #7 in FY2024 and #4 in FY2025; up 2 since FY2020.
2	University of Southern California Top agencies Navy (Department of the Navy) Treasury (Department of the Treasury)	$5,668,411	2.6%	Rank history: #5 in FY2022, #3 in FY2023, #1 in FY2024 and #3 in FY2025; up 6 since FY2020.
3	George Washington University (The) 2 awardees Top agencies Navy (Department of the Navy) HHS (Department of Health and Human Services)	$5,460,638	2.5%	Rank history: #1 in FY2022, #2 in FY2023, #13 in FY2024 and #6 in FY2025; up 2 since FY2020.
4	The Trustees of the University of Pennsylvania 2 awardees Top agencies Navy (Department of the Navy)	$5,396,756	2.4%	Rank history: #4 in FY2022, #9 in FY2023, #9 in FY2024 and #48 in FY2025; up 10 since FY2020.
5	Embry-Riddle Aeronautical University, Inc. Top agencies Navy (Department of the Navy)	$5,067,870	2.3%	Rank history: #19 in FY2022, #4 in FY2023, #24 in FY2024 and #11 in FY2025; up 1 since FY2020.
6	Virginia Polytechnic Institute & State University Top agencies Navy (Department of the Navy)	$4,749,488	2.1%	Rank history: #6 in FY2022 and not on the FY2023–FY2025 lists; up 19 since FY2020.
7	The Pennsylvania State University 2 awardees Top agencies Navy (Department of the Navy) GSA (General Services Administration)	$4,356,015	2.0%	Rank history: #10 in FY2022, #35 in FY2023 and not on the FY2024–FY2025 lists; up 21 since FY2020.
8	Auburn University Top agencies Navy (Department of the Navy)	$3,953,703	1.8%	Rank history: not on the FY2022–FY2023 lists, #39 in FY2024 and #21 in FY2025; up 11 since FY2020.
9	Rector & Visitors of the University of Virginia Top agencies Navy (Department of the Navy)	$3,907,562	1.8%	Rank history: #21 in FY2022, #25 in FY2023, #25 in FY2024 and #57 in FY2025; up 24 since FY2020.
10	Virginia Military Institute Top agencies Navy (Department of the Navy)	$3,881,120	1.8%	Rank history: #8 in FY2022, #11 in FY2023, #4 in FY2024 and #8 in FY2025; up 1 since FY2020.
11	State of California Controllers Office 9 awardees, including San Diego State University, University of California, LOS Angeles and The Regents of the University of California. San Francisco Top agencies Navy (Department of the Navy) VA (Department of Veterans Affairs) EPA (Environmental Protection Agency)	$3,543,890	1.6%	Rank history: #20 in FY2022, #8 in FY2023, #59 in FY2024 and not on the FY2025 list; up 4 since FY2020.
12	Rensselaer Polytechnic Institute Top agencies Navy (Department of the Navy)	$3,341,757	1.5%	Rank history: #14 in FY2022, #19 in FY2023, #19 in FY2024 and #22 in FY2025; up 1 since FY2020.
13	Massachusetts Institute of Technology Top agencies Navy (Department of the Navy) Army (Department of the Army) Commerce (Department of Commerce)	$3,330,742	1.5%	Rank history: #15 in FY2022, #13 in FY2023, #10 in FY2024 and #20 in FY2025; down 6 since FY2020.
14	Norwich University Top agencies Navy (Department of the Navy)	$3,316,397	1.5%	Rank history: #12 in FY2022, #18 in FY2023, #6 in FY2024 and #7 in FY2025; down 5 since FY2020.
15	Jacksonville University Top agencies Navy (Department of the Navy)	$3,191,292	1.4%	Rank history: #13 in FY2022, #6 in FY2023, not on the FY2024 list and #2 in FY2025; up 20 since FY2020.
16	Midwestern University 2 awardees Top agencies Navy (Department of the Navy)	$3,157,423	1.4%	Rank history: #16 in FY2022, #12 in FY2023, #12 in FY2024 and #19 in FY2025; down 4 since FY2020.
17	The Vanderbilt University 2 awardees Top agencies Navy (Department of the Navy)	$3,102,271	1.4%	Rank history: #11 in FY2022, #10 in FY2023, #5 in FY2024 and #9 in FY2025; up 38 since FY2020.
18	The Regents of the University of Colorado 3 awardees Top agencies Navy (Department of the Navy) VA (Department of Veterans Affairs) DOI (Department of the Interior)	$2,837,838	1.3%	Rank history: #22 in FY2022, #21 in FY2023, #11 in FY2024 and #10 in FY2025; up 16 since FY2020.
19	Edward Via Virginia College of Osteopathic Medicine Top agencies Navy (Department of the Navy)	$2,767,700	1.3%	Rank history: #24 in FY2022, #26 in FY2023, #23 in FY2024 and #37 in FY2025; down 3 since FY2020.
20	The Administrators of Tulane Educational Fund 2 awardees Top agencies Navy (Department of the Navy)	$2,690,637	1.2%	Rank history: #40 in FY2022, #20 in FY2023, #21 in FY2024 and #23 in FY2025; down 2 since FY2020.
21	The Johns Hopkins University Top agencies OSD (Office of the Secretary of Defense) Navy (Department of the Navy)	$2,642,845	1.2%	Rank history: #17 in FY2022, #17 in FY2023, #17 in FY2024 and not on the FY2025 list; up 16 since FY2020.
22	George Mason University 2 awardees Top agencies USUHS (DOD Uniformed Services University of the Health Sciences) NASA (National Aeronautics and Space Administration) Navy (Department of the Navy)	$2,532,266	1.1%	Rank history: #27 in FY2022, #24 in FY2023 and not on the FY2024–FY2025 lists; up 9 since FY2020.
23	American University Top agencies DHS (Department of Homeland Security) Navy (Department of the Navy) HHS (Department of Health and Human Services)	$2,459,248	1.1%	Rank history: not on the FY2022–FY2025 lists; up 34 since FY2020.
24	President and Fellows of Harvard College 3 awardees Top agencies Navy (Department of the Navy) VA (Department of Veterans Affairs) Army (Department of the Army)	$2,453,503	1.1%	Rank history: #18 in FY2022, #22 in FY2023, #18 in FY2024 and #35 in FY2025; down 3 since FY2020.
25	Villanova University In the State of Pennsylvania Top agencies Navy (Department of the Navy)	$2,384,590	1.1%	Rank history: #7 in FY2022, #32 in FY2023 and not on the FY2024–FY2025 lists; down 21 since FY2020.
26	The Ohio State University 2 awardees Top agencies Navy (Department of the Navy) VA (Department of Veterans Affairs) Army (Department of the Army)	$2,312,511	1.0%	Rank history: #23 in FY2022, #28 in FY2023, #22 in FY2024 and #26 in FY2025; up 19 since FY2020.
27	Purdue University Top agencies Navy (Department of the Navy) USDA (Department of Agriculture)	$2,288,681	1.0%	Rank history: #26 in FY2022, #71 in FY2023, #26 in FY2024 and #13 in FY2025; down 7 since FY2020.
28	University of Rochester Top agencies Navy (Department of the Navy)	$2,272,225	1.0%	Rank history: #29 in FY2022, #36 in FY2023, #33 in FY2024 and #31 in FY2025; down 18 since FY2020.
29	The Texas A&M University System 3 awardees, including Texas A & M University System Health Science Center Top agencies Navy (Department of the Navy)	$2,271,155	1.0%	Rank history: #42 in FY2022, #15 in FY2023, #15 in FY2024 and #18 in FY2025; up 204 since FY2020.
30	University of the Pacific Top agencies Navy (Department of the Navy)	$2,252,844	1.0%	Rank history: #25 in FY2022, #16 in FY2023, #14 in FY2024 and #17 in FY2025; up 28 since FY2020.
31	University of Notre Dame DU Lac Top agencies Navy (Department of the Navy)	$2,209,187	1.0%	Rank history: #3 in FY2022, #1 in FY2023, #2 in FY2024 and #5 in FY2025; down 30 since FY2020.
32	Regents of the University of Michigan Top agencies Navy (Department of the Navy)	$2,196,999	1.0%	Rank history: not on the FY2022–FY2024 lists and #34 in FY2025; down 10 since FY2020.
33	Board of Governers State University System of Florida 8 awardees, including University of Florida, Florida State University and Florida A & M University Top agencies Navy (Department of the Navy)	$2,105,913	1.0%	Rank history: #34 in FY2022, #23 in FY2023, #67 in FY2024 and not on the FY2025 list; down 1 since FY2020.
34	A.t. Still University of Health Sciences Top agencies Navy (Department of the Navy)	$1,896,568	0.9%	Rank history: #30 in FY2022, #31 in FY2023, #32 in FY2024 and #27 in FY2025; down 5 since FY2020.
35	University System of Maryland 4 awardees, including University of Maryland, College Park, University of Maryland, Baltimore and University of Maryland Baltimore County Top agencies Navy (Department of the Navy) HHS (Department of Health and Human Services)	$1,760,434	0.8%	Rank history: #28 in FY2022, #75 in FY2023 and not on the FY2024–FY2025 lists; down 9 since FY2020.
36	University of Washington Top agencies Navy (Department of the Navy)	$1,625,580	0.7%	Rank history: #41 in FY2022, #50 in FY2023 and not on the FY2024–FY2025 lists; up 10 since FY2020.
37	Georgetown University Top agencies Navy (Department of the Navy) Smithsonian (Smithsonian Institution)	$1,620,466	0.7%	Rank history: #31 in FY2022, #33 in FY2023, #29 in FY2024 and #68 in FY2025; up 12 since FY2020.
38	Nova Southeastern University, Inc. Top agencies Navy (Department of the Navy)	$1,588,204	0.7%	Rank history: #32 in FY2022, #34 in FY2023, #27 in FY2024 and #30 in FY2025; up 12 since FY2020.
39	Western University of Health Sciences Top agencies Navy (Department of the Navy)	$1,511,730	0.7%	Rank history: #73 in FY2022, #29 in FY2023, #35 in FY2024 and #64 in FY2025; up 12 since FY2020.
40	Marquette University 2 awardees Top agencies Navy (Department of the Navy)	$1,448,939	0.7%	Rank history: #77 in FY2022, not on the FY2023 list, #89 in FY2024 and #46 in FY2025; up 22 since FY2020.
41	Oregon University System Through Oregon State University Top agencies Navy (Department of the Navy)	$1,406,991	0.6%	Rank history: #39 in FY2022, #57 in FY2023, #98 in FY2024 and not on the FY2025 list; up 80 since FY2020.
42	Lake Erie College of Osteopathic Medicine, Inc. Top agencies Navy (Department of the Navy)	$1,365,856	0.6%	Rank history: #58 in FY2022, #48 in FY2023, #42 in FY2024 and #47 in FY2025; down 4 since FY2020.
43	Carnegie-Mellon University Top agencies Navy (Department of the Navy) Treasury (Department of the Treasury)	$1,357,849	0.6%	Rank history: #46 in FY2022, #49 in FY2023, #50 in FY2024 and #56 in FY2025; down 7 since FY2020.
44	Arizona State University Top agencies Navy (Department of the Navy)	$1,340,707	0.6%	Rank history: #47 in FY2022, #45 in FY2023, #85 in FY2024 and #43 in FY2025; up 16 since FY2020.
45	South Carolina State of Through The Medical University of South Carolina Top agencies Navy (Department of the Navy)	$1,292,918	0.6%	Rank history: #50 in FY2022, #52 in FY2023, #63 in FY2024 and not on the FY2025 list; up 23 since FY2020.
46	University of Maryland, College Park Top agencies Navy (Department of the Navy)	$1,241,091	0.6%	Rank history: not on the FY2022–FY2025 lists; up 38 since FY2020.
47	Touro College 4 awardees, including Touro University, Touro University Nevada and New York Medical College Top agencies Navy (Department of the Navy)	$1,231,437	0.6%	Rank history: #59 in FY2022, #27 in FY2023, #36 in FY2024 and #53 in FY2025; down 5 since FY2020.
48	Trustees of Boston University Top agencies Navy (Department of the Navy)	$1,184,824	0.5%	Rank history: #33 in FY2022, #38 in FY2023, #30 in FY2024 and #40 in FY2025; up 18 since FY2020.
49	University of South Carolina Top agencies Navy (Department of the Navy)	$1,183,985	0.5%	Rank history: #49 in FY2022, #63 in FY2023, #87 in FY2024 and not on the FY2025 list; down 5 since FY2020.
50	University of Wisconsin System Top agencies Navy (Department of the Navy)	$1,181,735	0.5%	Rank history: #53 in FY2022, #47 in FY2023 and not on the FY2024–FY2025 lists; up 9 since FY2020.
51	Rocky Vista University LLC Top agencies Navy (Department of the Navy)	$1,087,997	0.5%	Rank history: #45 in FY2022, #30 in FY2023, #16 in FY2024 and #15 in FY2025; up 2 since FY2020.
52	Old Dominion University Top agencies Navy (Department of the Navy)	$1,077,587	0.5%	Rank history: not on the FY2022 list, #79 in FY2023 and not on the FY2024–FY2025 lists; up 18 since FY2020.
53	Kansas City University Top agencies Navy (Department of the Navy)	$1,071,330	0.5%	Rank history: #62 in FY2022, #82 in FY2023, #84 in FY2024 and not on the FY2025 list; up 11 since FY2020.
54	Lincoln Memorial University Top agencies Navy (Department of the Navy)	$1,066,967	0.5%	Rank history: #44 in FY2022, #44 in FY2023, #41 in FY2024 and #42 in FY2025; up 7 since FY2020.
55	The Linux Foundation Top agencies Navy (Department of the Navy)	$1,062,000	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
56	Trustees of Boston College Top agencies Navy (Department of the Navy)	$1,030,010	0.5%	Rank history: #70 in FY2022, not on the FY2023 list, #91 in FY2024 and #96 in FY2025; up 11 since FY2020.
57	Iowa State University Through Iowa State University of Science and Technology Top agencies Navy (Department of the Navy)	$1,029,139	0.5%	Rank history: #79 in FY2022, #92 in FY2023, not on the FY2024 list and #70 in FY2025; up 61 since FY2020.
58	University of New Mexico 2 awardees, including University-Nm Controllers OFC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) VA (Department of Veterans Affairs)	$1,020,598	0.5%	Rank history: not on the FY2022 list, #74 in FY2023 and not on the FY2024–FY2025 lists; down 18 since FY2020.
59	University of Texas System 5 awardees, including The University of Texas Health Science Center At Houston, University of Texas At Austin and University of Texas Medical Branch At Galveston Top agencies Navy (Department of the Navy) DOS (Department of State) Smithsonian (Smithsonian Institution)	$1,011,143	0.5%	Rank history: #52 in FY2022, #51 in FY2023 and not on the FY2024–FY2025 lists; up 16 since FY2020.
60	Society of Defense Financial Management Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$1,004,007	0.5%	Rank history: #90 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
61	The Trustees of Columbia University In the City of New York 2 awardees Top agencies Navy (Department of the Navy)	$958,582	0.4%	Rank history: #57 in FY2022, #60 in FY2023, #62 in FY2024 and #58 in FY2025; up 2 since FY2020.
62	New York Institute of Technology Top agencies Navy (Department of the Navy)	$945,475	0.4%	Rank history: #61 in FY2022, #41 in FY2023, #47 in FY2024 and #63 in FY2025; up 7 since FY2020.
63	University of Utah 2 awardees Top agencies Navy (Department of the Navy)	$938,220	0.4%	Rank history: #64 in FY2022, #96 in FY2023 and not on the FY2024–FY2025 lists; up 34 since FY2020.
64	Advance Employee Intelligence, LLC Top agencies DOT (Department of Transportation)	$920,605	0.4%	Rank history: not on the FY2022–FY2025 lists; up 15 since FY2020.
65	Maine Maritime Academy Top agencies Navy (Department of the Navy)	$920,122	0.4%	Rank history: #36 in FY2022, #37 in FY2023, #38 in FY2024 and #29 in FY2025; up 70 since FY2020.
66	Idaho College of Osteopathic Medicine LLC Top agencies Navy (Department of the Navy)	$882,244	0.4%	Rank history: #48 in FY2022, #40 in FY2023, #44 in FY2024 and #50 in FY2025; up 33 since FY2020.
67	Duke University Top agencies Navy (Department of the Navy)	$876,513	0.4%	Rank history: not on the FY2022 list, #43 in FY2023, #95 in FY2024 and #83 in FY2025; up 16 since FY2020.
68	University of the Incarnate Word Top agencies Navy (Department of the Navy)	$836,574	0.4%	Rank history: #56 in FY2022, #88 in FY2023, #75 in FY2024 and not on the FY2025 list; up 13 since FY2020.
69	University of Illinois Top agencies Navy (Department of the Navy)	$826,963	0.4%	Rank history: not on the FY2022–FY2025 lists; up 4 since FY2020.
70	The University of Alabama System Through University of Alabama At Birmingham Top agencies Navy (Department of the Navy)	$818,041	0.4%	Rank history: #83 in FY2022, #78 in FY2023 and not on the FY2024–FY2025 lists; down 5 since FY2020.
71	Campbell University Top agencies Navy (Department of the Navy)	$805,542	0.4%	Rank history: #76 in FY2022, #70 in FY2023, #68 in FY2024 and #74 in FY2025; up 14 since FY2020.
72	UEI PJGESUN6AWC8 Top agencies Navy (Department of the Navy)	$802,147	0.4%	Rank history: #88 in FY2022, not on the FY2023–FY2024 lists and #85 in FY2025; up 61 since FY2020.
73	Northwestern University Top agencies Navy (Department of the Navy)	$787,202	0.4%	Rank history: #72 in FY2022, #73 in FY2023, #56 in FY2024 and #44 in FY2025; down 25 since FY2020.
74	Trustees of Tufts College 2 awardees Top agencies Navy (Department of the Navy)	$782,752	0.4%	Rank history: #80 in FY2022 and not on the FY2023–FY2025 lists; down 33 since FY2020.
75	Rutgers, the State University Top agencies Navy (Department of the Navy)	$773,615	0.3%	Rank history: #37 in FY2022, #56 in FY2023, #65 in FY2024 and #45 in FY2025; up 88 since FY2020.
76	UEI D7VCKYC47XF3 Top agencies Navy (Department of the Navy)	$771,605	0.3%	Rank history: #54 in FY2022, #76 in FY2023, #73 in FY2024 and not on the FY2025 list; up 14 since FY2020.
77	Alabama College of Osteopathic Medicine, Inc The Top agencies Navy (Department of the Navy)	$756,318	0.3%	Rank history: #74 in FY2022, #66 in FY2023, #79 in FY2024 and not on the FY2025 list; up 14 since FY2020.
78	Burrell College of Osteopathic Medicine LLC Top agencies Navy (Department of the Navy)	$743,111	0.3%	Rank history: not on the FY2022 list, #91 in FY2023, #51 in FY2024 and #54 in FY2025; up 14 since FY2020.
79	American Hospital Association 2 awardees, including American Organization for Nursing Leadership Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) Army (Department of the Army)	$740,361	0.3%	Rank history: #67 in FY2022, #64 in FY2023, #54 in FY2024 and #72 in FY2025; up 65 since FY2020.
80	Gartner, Inc. Top agencies DHS (Department of Homeland Security) DLA (Defense Logistics Agency) Commerce (Department of Commerce)	$729,218	0.3%	Rank history: #71 in FY2022, #80 in FY2023, #74 in FY2024 and not on the FY2025 list; up 125 since FY2020.
81	Creighton University Top agencies Navy (Department of the Navy)	$721,448	0.3%	Rank history: #55 in FY2022, #54 in FY2023, #53 in FY2024 and #62 in FY2025; down 4 since FY2020.
82	National Academy of Sciences Top agencies USAF (Department of the Air Force) DOI (Department of the Interior) DOT (Department of Transportation)	$720,720	0.3%	Rank history: #94 in FY2022, #95 in FY2023, #100 in FY2024 and not on the FY2025 list; down 2 since FY2020.
83	New York University 2 awardees Top agencies Navy (Department of the Navy) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$702,720	0.3%	Rank history: #63 in FY2022, #55 in FY2023, not on the FY2024 list and #59 in FY2025; up 10 since FY2020.
84	Loma Linda University Top agencies Navy (Department of the Navy)	$677,856	0.3%	Rank history: not on the FY2022 list, #39 in FY2023, #37 in FY2024 and #24 in FY2025; up 4 since FY2020.
85	Trustees of Indiana University 2 awardees Top agencies Navy (Department of the Navy) VA (Department of Veterans Affairs)	$673,880	0.3%	Rank history: #89 in FY2022, #61 in FY2023 and not on the FY2024–FY2025 lists; down 7 since FY2020.
86	The University of Mississippi Top agencies Navy (Department of the Navy)	$660,003	0.3%	Rank history: not on the FY2022–FY2023 lists, #72 in FY2024 and #73 in FY2025; down 4 since FY2020.
87	DES Moines University Osteopathic Medical Center Top agencies Navy (Department of the Navy)	$638,650	0.3%	Rank history: not on the FY2022 list, #77 in FY2023, #86 in FY2024 and not on the FY2025 list; up 22 since FY2020.
88	University of New England Top agencies Navy (Department of the Navy)	$609,828	0.3%	Rank history: #85 in FY2022, #68 in FY2023, #64 in FY2024 and #86 in FY2025; up 13 since FY2020.
89	UEI V731MPDBSRL8 Top agencies Navy (Department of the Navy)	$593,438	0.3%	Rank history: #78 in FY2022, #65 in FY2023, #48 in FY2024 and not on the FY2025 list; up 14 since FY2020.
90	Meharry Medical College Top agencies Navy (Department of the Navy)	$585,693	0.3%	Rank history: not on the FY2022–FY2025 lists; up 40 since FY2020.
91	University of North Carolina at Chapel Hill 4 awardees, including East Carolina University and University of North Carolina System Office Top agencies Navy (Department of the Navy) HHS (Department of Health and Human Services)	$577,704	0.3%	Rank history: not on the FY2022 list, #67 in FY2023 and not on the FY2024–FY2025 lists; down 74 since FY2020.
92	Marian University Inc. Top agencies Navy (Department of the Navy)	$577,186	0.3%	Rank history: not on the FY2022–FY2025 lists; up 10 since FY2020.
93	University of South Florida Top agencies Navy (Department of the Navy)	$573,924	0.3%	Rank history: not on the FY2022–FY2025 lists; up 44 since FY2020.
94	Regents of the University of Idaho Top agencies Navy (Department of the Navy)	$567,631	0.3%	Rank history: #92 in FY2022, not on the FY2023 list, #71 in FY2024 and #81 in FY2025; up 22 since FY2020.
95	Philadelphia College of Osteopathic Medicine Top agencies Navy (Department of the Navy)	$561,961	0.3%	Rank history: #38 in FY2022, #46 in FY2023, #60 in FY2024 and #60 in FY2025; down 56 since FY2020.
96	A Nevada Non-Profit Corporation Roseman University of Health Sciences Top agencies Navy (Department of the Navy)	$558,576	0.3%	Rank history: not on the FY2022 list, #85 in FY2023, #66 in FY2024 and #89 in FY2025; up 26 since FY2020.
97	The University of Iowa Top agencies Navy (Department of the Navy)	$550,760	0.2%	Rank history: #81 in FY2022, #62 in FY2023, #58 in FY2024 and #84 in FY2025; up 71 since FY2020.
98	Quinnipiac University Top agencies Navy (Department of the Navy)	$546,815	0.2%	Rank history: not on the FY2022–FY2025 lists; up 16 since FY2020.
99	Neevsys Inc. Top agencies HHS (Department of Health and Human Services)	$538,630	0.2%	Rank history: #97 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
100	Oregon Health & Science University Top agencies Navy (Department of the Navy)	$538,000	0.2%	Rank history: #68 in FY2022, not on the FY2023 list, #94 in FY2024 and #92 in FY2025; up 8 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 $221 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