Top 100 Contractors in PSC AJ12: General Science and Technology R&D Services; General Science and Technology; Applied Research, FY2021

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Battelle Savannah River Alliance, LLC Top agencies DOE (Department of Energy)	$171,618,297	24.3%	Rank history: not on the FY2022–FY2023 lists, #1 in FY2024 and #1 in FY2025; new, not ranked in FY2020.
2	Vanderbelt University Medical Center Through Vanderbilt University Medical Center Top agencies HHS (Department of Health and Human Services)	$29,780,615	4.2%	Rank history: #13 in FY2022, #10 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
3	Universities Space Research Association Top agencies NASA (National Aeronautics and Space Administration)	$24,293,201	3.4%	Rank history: #7 in FY2022, #11 in FY2023, #14 in FY2024 and not on the FY2025 list; down 2 since FY2020.
4	Southwest Research Institute Top agencies USAF (Department of the Air Force) Treasury (Department of the Treasury) WHS (DOD Washington Headquarters Service)	$22,741,791	3.2%	Rank history: #6 in FY2022, #8 in FY2023, #8 in FY2024 and #27 in FY2025; up 40 since FY2020.
5	The Mitre Corporation Top agencies DHS (Department of Homeland Security) Commerce (Department of Commerce) HHS (Department of Health and Human Services)	$20,028,260	2.8%	Rank history: #3 in FY2022, #5 in FY2023, #5 in FY2024 and #3 in FY2025; new, not ranked in FY2020.
6	DCS Corporation 2 awardees Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$18,582,049	2.6%	Rank history: #11 in FY2022, #6 in FY2023, #7 in FY2024 and #9 in FY2025; new, not ranked in FY2020.
7	Linquest Corporation Through The Perduco Group, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$16,651,333	2.4%	Rank history: #5 in FY2022, #3 in FY2023, #4 in FY2024 and #7 in FY2025; new, not ranked in FY2020.
8	Next Defense Solutions, LLC Top agencies Army (Department of the Army)	$15,655,709	2.2%	Rank history: #10 in FY2022, #23 in FY2023, #16 in FY2024 and #26 in FY2025; new, not ranked in FY2020.
9	The Trustees of the Stevens Institute of Technology Top agencies Army (Department of the Army)	$15,488,294	2.2%	Rank history: not on the FY2022–FY2025 lists; down 3 since FY2020.
10	Battelle Memorial Institute 2 awardees, including Battelle Savannah River Alliance, LLC Top agencies DOE (Department of Energy) DHS (Department of Homeland Security) HHS (Department of Health and Human Services)	$11,744,447	1.7%	Rank history: #1 in FY2022, #1 in FY2023, #2 in FY2024 and #13 in FY2025; new, not ranked in FY2020.
11	The Tomorrow Companies Inc. Top agencies USAF (Department of the Air Force)	$10,000,000	1.4%	Rank history: #48 in FY2022, #41 in FY2023, #31 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
12	Illuminated Holdings Inc. Through Phoenix LLC Top agencies DHS (Department of Homeland Security)	$9,088,579	1.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
13	The Leland Stanford Junior University Top agencies HHS (Department of Health and Human Services)	$8,955,992	1.3%	Rank history: not on the FY2022–FY2024 lists and #76 in FY2025; down 10 since FY2020.
14	Kratos Defense & Security Solutions, Inc. Through Florida Turbine Technologies, Inc. Top agencies USAF (Department of the Air Force)	$8,129,226	1.2%	Rank history: #17 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
15	University of Maine System Top agencies Army (Department of the Army)	$7,898,652	1.1%	Rank history: not on the FY2022 list, #35 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
16	RTX Corporation 2 awardees, including Rockwell Collins, Inc. Top agencies DARPA (Defense Advanced Research Projects Agency) USAF (Department of the Air Force)	$7,185,020	1.0%	Rank history: #9 in FY2022, #7 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
17	Advanced Core Concepts LLC Through Arctos Technology Solutions, LLC Top agencies USAF (Department of the Air Force) OSD (Office of the Secretary of Defense)	$6,747,049	1.0%	Rank history: #16 in FY2022, #24 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
18	Hyperion Technology Group Inc. Top agencies Army (Department of the Army)	$6,599,108	0.9%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
19	The Johns Hopkins University 2 awardees, including The Johns Hopkins University Applied Physics Laboratory LLC Top agencies HHS (Department of Health and Human Services) Army (Department of the Army) DHS (Department of Homeland Security)	$6,361,048	0.9%	Rank history: #28 in FY2022, #15 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
20	Newsight Reality Inc. Top agencies USSOCOM (United States Special Operations Command)	$5,519,759	0.8%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
21	Mississippi State University Top agencies Army (Department of the Army)	$5,407,896	0.8%	Rank history: #40 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
22	University of Alaska System Through University of Alaska Fairbanks Top agencies Army (Department of the Army) HHS (Department of Health and Human Services)	$5,399,424	0.8%	Rank history: not on the FY2022 list, #49 in FY2023, #28 in FY2024 and not on the FY2025 list; up 40 since FY2020.
23	Rowan University Top agencies Army (Department of the Army)	$5,200,000	0.7%	Rank history: not on the FY2022 list, #18 in FY2023, #72 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
24	Technology Service Corp Through Praxis, Inc. Top agencies Navy (Department of the Navy)	$5,132,998	0.7%	Rank history: #14 in FY2022, #16 in FY2023, #30 in FY2024 and #21 in FY2025; down 19 since FY2020.
25	Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek TNO Through Ministerie Van Volksgezondheid, Welzijn En Sport Top agencies HHS (Department of Health and Human Services)	$5,031,575	0.7%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
26	Research Triangle Institute Top agencies HHS (Department of Health and Human Services)	$4,933,523	0.7%	Rank history: #39 in FY2022, #48 in FY2023, #59 in FY2024 and #42 in FY2025; new, not ranked in FY2020.
27	GXM Technologies LLC Top agencies Army (Department of the Army)	$4,493,081	0.6%	Rank history: #19 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
28	New Jersey Institute of Technology Top agencies Army (Department of the Army) NASA (National Aeronautics and Space Administration)	$4,268,789	0.6%	Rank history: not on the FY2022 list, #50 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
29	Aptima Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$4,120,970	0.6%	Rank history: #78 in FY2022, #29 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
30	HDT Bio Corp Top agencies HHS (Department of Health and Human Services)	$4,015,904	0.6%	Rank history: #63 in FY2022 and not on the FY2023–FY2025 lists; down 22 since FY2020.
31	Nevada State Veterans Home 2 awardees, including Nevada System of Higher Education and Board of Regents of Nevada System of Higher Education Top agencies Army (Department of the Army) HHS (Department of Health and Human Services)	$3,984,585	0.6%	Rank history: not on the FY2022 list, #76 in FY2023 and not on the FY2024–FY2025 lists; down 20 since FY2020.
32	State of California Controllers Office 8 awardees, including University of California Santa Cruz, The Regents of the University of California. San Francisco and University of California Irvine Top agencies HHS (Department of Health and Human Services) Army (Department of the Army) Navy (Department of the Navy)	$3,904,690	0.6%	Rank history: #36 in FY2022, #33 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
33	University of Wisconsin System Top agencies HHS (Department of Health and Human Services) NRC (Nuclear Regulatory Commission)	$3,857,869	0.5%	Rank history: #25 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
34	Family Health Centers of San Diego Inc. Top agencies HHS (Department of Health and Human Services)	$3,686,672	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
35	The University of Southern Mississippi Top agencies Army (Department of the Army)	$3,637,179	0.5%	Rank history: #50 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
36	General Dynamics Corporation 2 awardees, including General Dynamics Mission Systems, Inc. and General Dynamics One Source LLC Top agencies Commerce (Department of Commerce) Army (Department of the Army)	$3,486,936	0.5%	Rank history: #45 in FY2022, not on the FY2023–FY2024 lists and #29 in FY2025; new, not ranked in FY2020.
37	4D TECH Solutions, Inc. Top agencies Army (Department of the Army)	$3,251,555	0.5%	Rank history: not on the FY2022 list, #53 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
38	National Academy of Sciences Top agencies USAF (Department of the Air Force) WHS (DOD Washington Headquarters Service) HHS (Department of Health and Human Services)	$3,214,199	0.5%	Rank history: #46 in FY2022, #38 in FY2023, #62 in FY2024 and #77 in FY2025; down 20 since FY2020.
39	Calista Corp Through Yulista Support Services LLC Top agencies Army (Department of the Army)	$3,093,444	0.4%	Rank history: #37 in FY2022, #59 in FY2023 and not on the FY2024–FY2025 lists; down 32 since FY2020.
40	Leidos Holdings, Inc. 2 awardees, including Leidos, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$3,077,458	0.4%	Rank history: #2 in FY2022, #2 in FY2023, #13 in FY2024 and #5 in FY2025; up 24 since FY2020.
41	Arkansas University Of Through University of Arkansas Top agencies Army (Department of the Army)	$3,000,000	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
42	University of Dayton Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration)	$2,847,105	0.4%	Rank history: #43 in FY2022, #14 in FY2023, #18 in FY2024 and #22 in FY2025; down 13 since FY2020.
43	The Washington University Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$2,843,970	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
44	Rolls-Royce Military Aero Engines Ltd Through Rolls-Royce North American Technologies Inc. Top agencies USAF (Department of the Air Force) OSD (Office of the Secretary of Defense)	$2,702,000	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
45	National Opinion Research Center Top agencies HHS (Department of Health and Human Services)	$2,692,719	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
46	Board of Governers State University System of Florida 3 awardees, including The University of Central Florida Board of Trustees, Florida Atlantic University and University of Florida Top agencies Army (Department of the Army) HHS (Department of Health and Human Services) NASA (National Aeronautics and Space Administration)	$2,637,115	0.4%	Rank history: #57 in FY2022, #75 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
47	The University of Mississippi Top agencies Army (Department of the Army)	$2,569,241	0.4%	Rank history: #23 in FY2022, #37 in FY2023, #50 in FY2024 and #84 in FY2025; new, not ranked in FY2020.
48	Luna Innovations Incorporated Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$2,563,208	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
49	Diligent Corporation Through Galvanize Inc. Top agencies USSOCOM (United States Special Operations Command) USAF (Department of the Air Force)	$2,537,532	0.4%	Rank history: #58 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
50	University of Nebraska Through Board of Regents of the University of Nebraska Top agencies HHS (Department of Health and Human Services)	$2,489,781	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
51	Emory University Top agencies HHS (Department of Health and Human Services)	$2,404,075	0.3%	Rank history: not on the FY2022 list, #85 in FY2023 and not on the FY2024–FY2025 lists; down 2 since FY2020.
52	Helios Remote Sensing Systems, Inc. Top agencies Army (Department of the Army)	$2,351,995	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
53	BAE Systems Land & Armaments L.P. Through BAE Systems Information and Electronic Systems Integration Inc. Top agencies Army (Department of the Army)	$2,300,173	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
54	The Trustees of the University of Pennsylvania Top agencies HHS (Department of Health and Human Services)	$2,221,231	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
55	Virginia TECH Applied Research Corp Top agencies DISA (Defense Information Systems Agency)	$2,207,897	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
56	J Michael Consulting LLC Top agencies HHS (Department of Health and Human Services)	$2,166,469	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
57	University of Georgia Research Foundation, Inc. Top agencies HHS (Department of Health and Human Services)	$2,112,164	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
58	ABT Global LLC Top agencies HHS (Department of Health and Human Services)	$2,042,044	0.3%	Rank history: #79 in FY2022, #68 in FY2023, #90 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
59	University of Vermont & State Agricultural College Top agencies Army (Department of the Army)	$2,000,000	0.3%	Rank history: #90 in FY2022, not on the FY2023 list, #38 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
60	Israel-U.s. Binational Industrial Research & Dev. Foundation Top agencies DHS (Department of Homeland Security)	$1,895,000	0.3%	Rank history: #88 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
61	Engineering & Computer Simulations, Inc. Top agencies Army (Department of the Army)	$1,893,688	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
62	HII Mission Technologies Corp Top agencies Navy (Department of the Navy)	$1,801,127	0.3%	Rank history: #41 in FY2022, #62 in FY2023 and not on the FY2024–FY2025 lists; down 42 since FY2020.
63	Marshfield Clinic Health System, Inc. Through Marshfield Clinic, Inc. Top agencies HHS (Department of Health and Human Services)	$1,725,838	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
64	University of Oxford Top agencies HHS (Department of Health and Human Services)	$1,703,771	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
65	Advanced Magnet Lab, Inc. Top agencies WHS (DOD Washington Headquarters Service)	$1,698,275	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
66	Colorado State University System Through Colorado State University Top agencies HHS (Department of Health and Human Services) Army (Department of the Army)	$1,646,724	0.2%	Rank history: not on the FY2022–FY2025 lists; down 54 since FY2020.
67	Cherokee Nation Through Cherokee Nation Strategic Programs, L.L.C. Top agencies Commerce (Department of Commerce)	$1,642,532	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
68	Excet, LLC Top agencies Navy (Department of the Navy)	$1,605,682	0.2%	Rank history: #69 in FY2022, #46 in FY2023, #47 in FY2024 and #38 in FY2025; down 54 since FY2020.
69	Marshall University Research Corporation Top agencies Army (Department of the Army)	$1,597,357	0.2%	Rank history: #49 in FY2022, not on the FY2023 list, #80 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
70	University of North Carolina at Chapel Hill Through North Carolina State University Top agencies HHS (Department of Health and Human Services)	$1,550,190	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
71	Teamstaff Inc. Through Social & Scientific Systems, Inc. Top agencies HHS (Department of Health and Human Services)	$1,546,058	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
72	NP Strategies, LLC Top agencies DHS (Department of Homeland Security)	$1,545,286	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
73	Ansol Inc. Top agencies Navy (Department of the Navy)	$1,511,538	0.2%	Rank history: #75 in FY2022, #99 in FY2023, #77 in FY2024 and #69 in FY2025; new, not ranked in FY2020.
74	Kaiser Foundation Health Plan of Washington Through Kaiser Foundation Hospitals Top agencies HHS (Department of Health and Human Services)	$1,495,325	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
75	Applied Research Associates, Inc. Top agencies Navy (Department of the Navy) DOT (Department of Transportation) Army (Department of the Army)	$1,464,354	0.2%	Rank history: #55 in FY2022, #25 in FY2023, #35 in FY2024 and #32 in FY2025; down 42 since FY2020.
76	The Pennsylvania State University Top agencies HHS (Department of Health and Human Services) Army (Department of the Army)	$1,441,795	0.2%	Rank history: #56 in FY2022, not on the FY2023 list, #67 in FY2024 and #55 in FY2025; new, not ranked in FY2020.
77	Saildrone Inc. Top agencies Commerce (Department of Commerce)	$1,411,880	0.2%	Rank history: #72 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
78	Virginia Polytechnic Institute & State University Top agencies Army (Department of the Army) VA (Department of Veterans Affairs)	$1,377,779	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
79	Cubrc, Inc. Top agencies Navy (Department of the Navy)	$1,366,000	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
80	University of Washington Top agencies HHS (Department of Health and Human Services) DHS (Department of Homeland Security)	$1,349,789	0.2%	Rank history: #60 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
81	Orbital Micro Systems, Inc. Top agencies USAF (Department of the Air Force)	$1,349,209	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
82	Cortana Corporation Top agencies Navy (Department of the Navy)	$1,283,000	0.2%	Rank history: #76 in FY2022, #90 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
83	The Children'S Hospital of Philadelphia Foundation Through The Children's Hospital of Philadelphia Top agencies HHS (Department of Health and Human Services)	$1,279,777	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
84	Rochester Regional Health Through The Rochester General Hospital Top agencies HHS (Department of Health and Human Services)	$1,260,219	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
85	Regents of the University of Michigan Top agencies HHS (Department of Health and Human Services) Commerce (Department of Commerce)	$1,259,346	0.2%	Rank history: #61 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
86	Jacobs Engineering Group Inc. 2 awardees, including The Keyw Corporation and Sotera Defense Solutions, Inc. Top agencies Navy (Department of the Navy)	$1,250,500	0.2%	Rank history: not on the FY2022 list, #32 in FY2023 and not on the FY2024–FY2025 lists; down 48 since FY2020.
87	Neany, Inc. Top agencies Army (Department of the Army)	$1,139,452	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
88	Oregon Health & Science University Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$1,137,892	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
89	Goldbelt, Incorporated Through Goldbelt C6, LLC Top agencies HHS (Department of Health and Human Services)	$1,121,222	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
90	Regents of the University of Minnesota Top agencies HHS (Department of Health and Human Services)	$1,120,359	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
91	Oneida Nation Through Oneida Total Integrated Enterprises LLC Top agencies USAF (Department of the Air Force)	$1,117,009	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
92	Vistology, Inc. Top agencies Army (Department of the Army)	$1,109,902	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
93	Aeroprobe Corporation Through Meld Manufacturing Corporation Top agencies Army (Department of the Army)	$1,099,970	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
94	Space Micro Inc. Top agencies Army (Department of the Army)	$1,099,825	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
95	The Translational Genomics Research Institute Top agencies HHS (Department of Health and Human Services)	$1,074,709	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
96	University of Texas System 4 awardees, including University of Texas Medical Branch At Galveston, The University of Texas At San Antonio and University of Texas At Austin Top agencies HHS (Department of Health and Human Services) Army (Department of the Army) Commerce (Department of Commerce)	$1,063,817	0.2%	Rank history: not on the FY2022–FY2025 lists; down 27 since FY2020.
97	Icon Government and Public Health Solutions Inc. Top agencies Army (Department of the Army) DHA (Defense Health Agency)	$1,052,552	0.1%	Rank history: not on the FY2022–FY2025 lists; down 88 since FY2020.
98	Carnegie Robotics LLC Top agencies Army (Department of the Army)	$1,050,000	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
99	PPG Industries, Inc. Top agencies OSD (Office of the Secretary of Defense)	$1,032,216	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
100	Eaton Corporation Top agencies Army (Department of the Army)	$1,000,000	0.1%	Rank history: #44 in FY2022, #43 in FY2023 and not on the FY2024–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 $706 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