Top 100 Contractors in NAICS 541714: Research and Development in Biotechnology (except Nanobiotechnology), FY2021

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	The Boeing Company Top agencies MDA (DOD Missile Defense Agency)	$1,384,337,913	54.3%	Rank history: #1 in FY2022, #5 in FY2023, #3 in FY2024 and #6 in FY2025; unchanged since FY2020.
2	Siga Technologies, Inc. Top agencies HHS (Department of Health and Human Services)	$112,567,056	4.4%	Rank history: #17 in FY2022, #7 in FY2023, #6 in FY2024 and #9 in FY2025; up 1 since FY2020.
3	L3Harris Technologies, Inc. Through L3 Technologies, Inc. Top agencies Navy (Department of the Navy)	$73,473,850	2.9%	Rank history: not on the FY2022–FY2023 lists, #7 in FY2024 and #5 in FY2025; new, not ranked in FY2020.
4	Sabin Albert B Vaccine Inst Through Albert B. Sabin Vaccine Institute, Inc. (The) Top agencies HHS (Department of Health and Human Services)	$34,506,940	1.4%	Rank history: #23 in FY2022, #8 in FY2023 and not on the FY2024–FY2025 lists; up 7 since FY2020.
5	Allucent Government Services (Us) LLC Top agencies HHS (Department of Health and Human Services)	$34,161,959	1.3%	Rank history: not on the FY2022 list, #3 in FY2023, #59 in FY2024 and not on the FY2025 list; up 252 since FY2020.
6	Paratek Pharmaceuticals, Inc. Top agencies HHS (Department of Health and Human Services)	$31,618,151	1.2%	Rank history: not on the FY2022 list, #18 in FY2023, #28 in FY2024 and #72 in FY2025; down 4 since FY2020.
7	International Aids Vaccine Initiative Inc. Top agencies HHS (Department of Health and Human Services)	$30,351,043	1.2%	Rank history: #28 in FY2022, #16 in FY2023, #87 in FY2024 and not on the FY2025 list; up 137 since FY2020.
8	K W Tunnell Company Inc. Through Tunnell Consulting Inc. Top agencies HHS (Department of Health and Human Services)	$29,981,326	1.2%	Rank history: #13 in FY2022 and not on the FY2023–FY2025 lists; down 3 since FY2020.
9	Danaher Corporation 2 awardees, including Cepheid and Integrated DNA Technologies, Inc. Top agencies HHS (Department of Health and Human Services) NASA (National Aeronautics and Space Administration)	$27,959,316	1.1%	Rank history: #19 in FY2022, #27 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
10	Abss Solutions Inc. Top agencies USAF (Department of the Air Force)	$27,644,122	1.1%	Rank history: #14 in FY2022, not on the FY2023 list, #34 in FY2024 and #73 in FY2025; up 9 since FY2020.
11	Becton, Dickinson and Co Top agencies HHS (Department of Health and Human Services)	$24,748,754	1.0%	Rank history: #31 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
12	Microgem US Inc. Top agencies HHS (Department of Health and Human Services)	$24,369,230	1.0%	Rank history: not on the FY2022–FY2025 lists; up 3 since FY2020.
13	Puretech Health LLC Through Vedanta Biosciences, Inc. Top agencies HHS (Department of Health and Human Services)	$23,783,020	0.9%	Rank history: #68 in FY2022 and not on the FY2023–FY2025 lists; up 21 since FY2020.
14	Venatorx Pharmaceuticals Inc. Top agencies HHS (Department of Health and Human Services)	$21,986,788	0.9%	Rank history: #6 in FY2022, #22 in FY2023, #58 in FY2024 and not on the FY2025 list; down 8 since FY2020.
15	Icon Government and Public Health Solutions Inc. Top agencies HHS (Department of Health and Human Services) Army (Department of the Army)	$19,229,486	0.8%	Rank history: #48 in FY2022, #2 in FY2023 and not on the FY2024–FY2025 lists; up 136 since FY2020.
16	Novavax Inc. Top agencies Army (Department of the Army)	$15,718,275	0.6%	Rank history: not on the FY2022–FY2025 lists; down 9 since FY2020.
17	The Johns Hopkins University 2 awardees, including The Johns Hopkins University Applied Physics Laboratory LLC Top agencies DARPA (Defense Advanced Research Projects Agency) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$15,021,774	0.6%	Rank history: #20 in FY2022, #24 in FY2023 and not on the FY2024–FY2025 lists; up 4 since FY2020.
18	Selux Diagnostics, Inc. Top agencies HHS (Department of Health and Human Services)	$14,611,967	0.6%	Rank history: #35 in FY2022 and not on the FY2023–FY2025 lists; up 8 since FY2020.
19	Biofactura Inc. Top agencies HHS (Department of Health and Human Services)	$13,021,540	0.5%	Rank history: #29 in FY2022, not on the FY2023 list, #53 in FY2024 and not on the FY2025 list; up 122 since FY2020.
20	Seattle Children'S Hospital Top agencies HHS (Department of Health and Human Services)	$13,001,420	0.5%	Rank history: #27 in FY2022, #28 in FY2023, #21 in FY2024 and not on the FY2025 list; unchanged since FY2020.
21	Chembio Diagnostics Inc. Through Chembio Diagnostic Systems Inc. Top agencies HHS (Department of Health and Human Services)	$12,691,726	0.5%	Rank history: not on the FY2022–FY2025 lists; up 153 since FY2020.
22	Leidos Holdings, Inc. 2 awardees, including Leidos, Inc. Top agencies DARPA (Defense Advanced Research Projects Agency) HHS (Department of Health and Human Services)	$12,578,907	0.5%	Rank history: #37 in FY2022, #55 in FY2023, #35 in FY2024 and #12 in FY2025; up 13 since FY2020.
23	Icahn School of Medicine at Mount Sinai Top agencies DARPA (Defense Advanced Research Projects Agency) HHS (Department of Health and Human Services)	$12,383,945	0.5%	Rank history: #26 in FY2022, #78 in FY2023 and not on the FY2024–FY2025 lists; down 10 since FY2020.
24	Public Health Vaccines LLC Top agencies HHS (Department of Health and Human Services)	$12,294,690	0.5%	Rank history: not on the FY2022 list, #73 in FY2023, #55 in FY2024 and #23 in FY2025; new, not ranked in FY2020.
25	Inflammatix, Inc. Top agencies HHS (Department of Health and Human Services)	$12,183,772	0.5%	Rank history: not on the FY2022–FY2025 lists; up 7 since FY2020.
26	Visby Medical, Inc. Top agencies HHS (Department of Health and Human Services)	$12,172,171	0.5%	Rank history: #21 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
27	General Electric Company Top agencies DARPA (Defense Advanced Research Projects Agency)	$11,487,842	0.5%	Rank history: #41 in FY2022, #37 in FY2023, #61 in FY2024 and #39 in FY2025; up 27 since FY2020.
28	Infinity Biologix LLC Top agencies HHS (Department of Health and Human Services)	$11,445,000	0.4%	Rank history: not on the FY2022–FY2024 lists and #97 in FY2025; new, not ranked in FY2020.
29	Fincantieri Marine Systems North America Inc. Through Consiglio Nazionale Delle Ricerche - Istituto DI Ricerca Genetica E Biomedica Top agencies HHS (Department of Health and Human Services)	$11,408,934	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
30	Flambeau Diagnostics LLC Top agencies HHS (Department of Health and Human Services)	$10,900,000	0.4%	Rank history: #33 in FY2022 and not on the FY2023–FY2025 lists; up 21 since FY2020.
31	Chrysalis Biotherapeutics, Inc. Top agencies HHS (Department of Health and Human Services)	$10,455,381	0.4%	Rank history: #93 in FY2022 and not on the FY2023–FY2025 lists; up 90 since FY2020.
32	Contrafect Corporation Top agencies HHS (Department of Health and Human Services)	$9,767,226	0.4%	Rank history: #60 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
33	Duke University 2 awardees, including Duke University Health System, Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs) Navy (Department of the Navy)	$9,738,771	0.4%	Rank history: #30 in FY2022, #36 in FY2023, #30 in FY2024 and #57 in FY2025; down 25 since FY2020.
34	President and Fellows of Harvard College 2 awardees Top agencies HHS (Department of Health and Human Services) Army (Department of the Army) VA (Department of Veterans Affairs)	$9,371,073	0.4%	Rank history: #49 in FY2022, #25 in FY2023 and not on the FY2024–FY2025 lists; down 6 since FY2020.
35	The University of Chicago Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$8,756,382	0.3%	Rank history: #58 in FY2022, #52 in FY2023 and not on the FY2024–FY2025 lists; down 5 since FY2020.
36	Massachusetts Institute of Technology Top agencies HHS (Department of Health and Human Services)	$8,572,686	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
37	The Trustees of the University of Pennsylvania Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs) Navy (Department of the Navy)	$8,469,288	0.3%	Rank history: #57 in FY2022, #62 in FY2023 and not on the FY2024–FY2025 lists; up 3 since FY2020.
38	Florida Institute for Human & Machine Cognition Inc. Top agencies DARPA (Defense Advanced Research Projects Agency)	$8,284,623	0.3%	Rank history: not on the FY2022–FY2025 lists; down 1 since FY2020.
39	Sri International Top agencies HHS (Department of Health and Human Services)	$6,572,060	0.3%	Rank history: #42 in FY2022, #32 in FY2023, #77 in FY2024 and not on the FY2025 list; down 17 since FY2020.
40	University of Montana System Through University of Montana Top agencies HHS (Department of Health and Human Services)	$6,405,500	0.3%	Rank history: #32 in FY2022, #46 in FY2023 and not on the FY2024–FY2025 lists; down 28 since FY2020.
41	T2 Biosystems, Inc. Top agencies HHS (Department of Health and Human Services)	$6,357,371	0.2%	Rank history: #55 in FY2022 and not on the FY2023–FY2025 lists; down 16 since FY2020.
42	Access To Advanced Health Institute Top agencies HHS (Department of Health and Human Services)	$6,286,281	0.2%	Rank history: #59 in FY2022, not on the FY2023 list, #83 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
43	Battelle Memorial Institute Top agencies DARPA (Defense Advanced Research Projects Agency) HHS (Department of Health and Human Services)	$6,229,246	0.2%	Rank history: #38 in FY2022, #26 in FY2023, #15 in FY2024 and #4 in FY2025; unchanged since FY2020.
44	Ball Corp Through BAE Systems Space & Mission Systems Inc. Top agencies USAF (Department of the Air Force)	$5,999,093	0.2%	Rank history: not on the FY2022–FY2025 lists; down 6 since FY2020.
45	University of Pittsburgh - of the Commonwealth System of Higher Education Top agencies DARPA (Defense Advanced Research Projects Agency) HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$5,800,265	0.2%	Rank history: #88 in FY2022, #82 in FY2023, #85 in FY2024 and #98 in FY2025; up 18 since FY2020.
46	Abbott Laboratories Top agencies Army (Department of the Army)	$5,707,771	0.2%	Rank history: #16 in FY2022, not on the FY2023–FY2024 lists and #25 in FY2025; down 4 since FY2020.
47	Booz Allen Hamilton Holding Corporation 2 awardees, including Booz Allen Hamilton Inc. Top agencies HHS (Department of Health and Human Services)	$5,678,566	0.2%	Rank history: #36 in FY2022, #39 in FY2023, #39 in FY2024 and #47 in FY2025; up 340 since FY2020.
48	State of California Controllers Office 4 awardees, including University of California, LOS Angeles, University of California, San Diego and The Regents of the University of California. San Francisco Top agencies HHS (Department of Health and Human Services) DARPA (Defense Advanced Research Projects Agency) VA (Department of Veterans Affairs)	$5,535,013	0.2%	Rank history: #51 in FY2022, #33 in FY2023 and not on the FY2024–FY2025 lists; up 71 since FY2020.
49	Research Triangle Institute Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$5,462,676	0.2%	Rank history: #73 in FY2022, #80 in FY2023, #79 in FY2024 and #86 in FY2025; up 87 since FY2020.
50	Innovative Defense Technologies, LLC Top agencies Navy (Department of the Navy)	$5,405,000	0.2%	Rank history: #78 in FY2022, #99 in FY2023 and not on the FY2024–FY2025 lists; down 5 since FY2020.
51	Nexelis Group Inc. Through Laboratories Nexelis Canada Inc. Top agencies HHS (Department of Health and Human Services)	$5,390,485	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
52	William Marsh Rice University Top agencies DARPA (Defense Advanced Research Projects Agency)	$5,363,480	0.2%	Rank history: not on the FY2022–FY2025 lists; up 115 since FY2020.
53	University System of Maryland 2 awardees, including University of Maryland, Baltimore and University of Maryland Baltimore County Top agencies HHS (Department of Health and Human Services) USUHS (DOD Uniformed Services University of the Health Sciences) VA (Department of Veterans Affairs)	$5,243,979	0.2%	Rank history: #75 in FY2022, #66 in FY2023 and not on the FY2024–FY2025 lists; up 19 since FY2020.
54	University of Texas System 4 awardees, including The Univeristy of Texas M.d. Anderson Cancer Center, University of Texas At Austin and The University of Texas Health Science Center At San Antonio Top agencies HHS (Department of Health and Human Services) DARPA (Defense Advanced Research Projects Agency) Army (Department of the Army)	$5,220,027	0.2%	Rank history: not on the FY2022 list, #92 in FY2023 and not on the FY2024–FY2025 lists; up 23 since FY2020.
55	Rutgers, the State University 3 awardees Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$4,859,821	0.2%	Rank history: #50 in FY2022, #87 in FY2023, #60 in FY2024 and #89 in FY2025; down 2 since FY2020.
56	Donald Danforth Plant Science Center Top agencies DARPA (Defense Advanced Research Projects Agency)	$4,633,262	0.2%	Rank history: not on the FY2022–FY2025 lists; up 34 since FY2020.
57	The Charles Stark Draper Laboratory, Inc. Top agencies DARPA (Defense Advanced Research Projects Agency)	$4,323,845	0.2%	Rank history: not on the FY2022 list, #19 in FY2023, #29 in FY2024 and #64 in FY2025; new, not ranked in FY2020.
58	Resilience Government Services, Inc. Top agencies HHS (Department of Health and Human Services)	$4,133,495	0.2%	Rank history: not on the FY2022 list, #84 in FY2023 and not on the FY2024–FY2025 lists; up 36 since FY2020.
59	Intific Inc Through Cubic Defense Applications, Inc. Top agencies DARPA (Defense Advanced Research Projects Agency)	$4,037,073	0.2%	Rank history: not on the FY2022–FY2025 lists; down 4 since FY2020.
60	Teledyne Technologies Incorporated Through Teledyne Scientific & Imaging, LLC Top agencies DARPA (Defense Advanced Research Projects Agency)	$3,700,000	0.1%	Rank history: not on the FY2022–FY2025 lists; up 149 since FY2020.
61	Brigham & Womens Hospital Inc 2 awardees, including The Mclean Hospital Corporation Top agencies HHS (Department of Health and Human Services) Army (Department of the Army)	$3,669,288	0.1%	Rank history: #56 in FY2022, #88 in FY2023 and not on the FY2024–FY2025 lists; up 8 since FY2020.
62	La Jolla Institute for Immunology Top agencies HHS (Department of Health and Human Services) Navy (Department of the Navy)	$3,633,923	0.1%	Rank history: #77 in FY2022, not on the FY2023 list, #63 in FY2024 and #69 in FY2025; up 2 since FY2020.
63	University of Liverpool Top agencies HHS (Department of Health and Human Services)	$3,510,074	0.1%	Rank history: not on the FY2022–FY2025 lists; down 19 since FY2020.
64	University of Notre Dame DU Lac Top agencies Army (Department of the Army)	$3,485,095	0.1%	Rank history: #87 in FY2022, #91 in FY2023 and not on the FY2024–FY2025 lists; up 383 since FY2020.
65	Goldbelt Frontier, LLC Top agencies Army (Department of the Army)	$3,139,185	0.1%	Rank history: #69 in FY2022, #64 in FY2023, #45 in FY2024 and not on the FY2025 list; up 8 since FY2020.
66	Emory University Top agencies HHS (Department of Health and Human Services)	$3,111,731	0.1%	Rank history: #83 in FY2022, #98 in FY2023, not on the FY2024 list and #95 in FY2025; down 14 since FY2020.
67	ST Jude Children's Research Hospital Inc. Top agencies HHS (Department of Health and Human Services)	$3,095,955	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
68	Mango Materials Inc. Top agencies NASA (National Aeronautics and Space Administration)	$3,000,000	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
69	Johnson & Johnson Through Janssen Research & Development, LLC Top agencies HHS (Department of Health and Human Services)	$2,979,429	0.1%	Rank history: not on the FY2022 list, #38 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
70	Honeywell International Inc. Top agencies DARPA (Defense Advanced Research Projects Agency)	$2,904,921	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
71	Carnegie-Mellon University Top agencies DARPA (Defense Advanced Research Projects Agency)	$2,800,000	0.1%	Rank history: #91 in FY2022 and not on the FY2023–FY2025 lists; up 92 since FY2020.
72	Physical Sciences Inc. Top agencies DARPA (Defense Advanced Research Projects Agency) Army (Department of the Army)	$2,795,799	0.1%	Rank history: #71 in FY2022, #81 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
73	World Wide Technology Holding Co. Inc. Through Asynchrony Solutions, LLC Top agencies DTRA (Defense Threat Reduction Agency)	$2,790,933	0.1%	Rank history: #98 in FY2022 and not on the FY2023–FY2025 lists; down 2 since FY2020.
74	DCS Corporation Top agencies Army (Department of the Army)	$2,734,548	0.1%	Rank history: #99 in FY2022, #93 in FY2023 and not on the FY2024–FY2025 lists; up 28 since FY2020.
75	Ministry of Defence Top agencies DTRA (Defense Threat Reduction Agency)	$2,649,251	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
76	University of Tennessee Top agencies DARPA (Defense Advanced Research Projects Agency)	$2,645,784	0.1%	Rank history: #70 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
77	CACI International Inc. 2 awardees, including Next Century Corporation and LGS Innovations LLC Top agencies DARPA (Defense Advanced Research Projects Agency)	$2,620,368	0.1%	Rank history: #81 in FY2022 and not on the FY2023–FY2025 lists; up 1 since FY2020.
78	Greffex Inc. Top agencies HHS (Department of Health and Human Services)	$2,543,566	0.1%	Rank history: not on the FY2022–FY2025 lists; down 8 since FY2020.
79	Myelo Therapeutics GMBH Top agencies HHS (Department of Health and Human Services)	$2,519,309	0.1%	Rank history: not on the FY2022–FY2025 lists; up 10 since FY2020.
80	Invirsa, Inc. Top agencies HHS (Department of Health and Human Services)	$2,511,750	0.1%	Rank history: not on the FY2022–FY2024 lists and #30 in FY2025; down 63 since FY2020.
81	Meabco Inc. Top agencies HHS (Department of Health and Human Services)	$2,438,747	0.1%	Rank history: not on the FY2022–FY2025 lists; up 11 since FY2020.
82	University of Washington Top agencies HHS (Department of Health and Human Services)	$2,390,677	0.1%	Rank history: not on the FY2022–FY2025 lists; up 173 since FY2020.
83	The Administrators of Tulane Educational Fund Top agencies HHS (Department of Health and Human Services) DTRA (Defense Threat Reduction Agency)	$2,323,554	0.1%	Rank history: #74 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
84	Rejuvenate Bio Inc. Top agencies USSOCOM (United States Special Operations Command)	$2,274,657	0.1%	Rank history: not on the FY2022–FY2025 lists; down 8 since FY2020.
85	Oregon Health & Science University Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$2,248,300	0.1%	Rank history: #97 in FY2022 and not on the FY2023–FY2025 lists; down 3 since FY2020.
86	University of Oklahoma Top agencies HHS (Department of Health and Human Services)	$2,239,885	0.1%	Rank history: #79 in FY2022 and not on the FY2023–FY2025 lists; down 24 since FY2020.
87	Jackson Laboratory Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$2,197,449	0.1%	Rank history: not on the FY2022–FY2023 lists, #96 in FY2024 and not on the FY2025 list; down 6 since FY2020.
88	The Geneva Foundation Top agencies Army (Department of the Army)	$2,181,251	0.1%	Rank history: not on the FY2022–FY2025 lists; up 124 since FY2020.
89	Synergene Therapeutics Inc. Top agencies DTRA (Defense Threat Reduction Agency)	$2,151,241	0.1%	Rank history: not on the FY2022–FY2025 lists; up 51 since FY2020.
90	Ginkgo Bioworks, Inc. Top agencies DARPA (Defense Advanced Research Projects Agency)	$2,147,823	0.1%	Rank history: not on the FY2022–FY2025 lists; down 22 since FY2020.
91	University of Wisconsin System 4 awardees, including University of Wisconsin Hospitals and Clinics Authority Top agencies HHS (Department of Health and Human Services) Navy (Department of the Navy) VA (Department of Veterans Affairs)	$2,141,387	0.1%	Rank history: not on the FY2022–FY2025 lists; up 47 since FY2020.
92	Lumostech, Inc. Top agencies OSD (Office of the Secretary of Defense) USSOCOM (United States Special Operations Command)	$2,141,340	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
93	Lovelace Respiratory 2 awardees, including Lovelace Biomedical and Environmental Research Institute, Inc. and Lovelace Biomedical Research Institute Top agencies HHS (Department of Health and Human Services)	$2,108,997	0.1%	Rank history: not on the FY2022–FY2025 lists; up 24 since FY2020.
94	Mantel Technologies, Inc. Top agencies USSOCOM (United States Special Operations Command) OSD (Office of the Secretary of Defense)	$2,051,421	0.1%	Rank history: not on the FY2022–FY2025 lists; up 20 since FY2020.
95	Southern Research Institute Top agencies HHS (Department of Health and Human Services)	$2,025,337	0.1%	Rank history: not on the FY2022–FY2025 lists; up 125 since FY2020.
96	Zymeron Corporation Top agencies HHS (Department of Health and Human Services) DARPA (Defense Advanced Research Projects Agency)	$2,024,999	0.1%	Rank history: not on the FY2022–FY2025 lists; up 83 since FY2020.
97	The Children's Hospital Corporation Top agencies HHS (Department of Health and Human Services)	$1,966,833	0.1%	Rank history: #44 in FY2022, #59 in FY2023 and not on the FY2024–FY2025 lists; down 81 since FY2020.
98	University of Miami Top agencies HHS (Department of Health and Human Services)	$1,891,753	0.1%	Rank history: not on the FY2022–FY2025 lists; down 32 since FY2020.
99	Military Health Research Foundation, Inc. Top agencies Army (Department of the Army)	$1,842,556	0.1%	Rank history: not on the FY2022 list, #96 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
100	Spaulding Clinical Research, LLC Top agencies HHS (Department of Health and Human Services)	$1,717,124	0.1%	Rank history: #96 in FY2022, #77 in FY2023 and not on the FY2024–FY2025 lists; down 33 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 $2.55 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