Top 100 Contractors in NAICS 541714: Research and Development in Biotechnology (except Nanobiotechnology), Aug 2025–Jul 2026

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Albert B. Sabin Vaccine Institute, Inc. (The) Top agencies HHS (Department of Health and Human Services)	$223,798,176	11.0%	Rank history: not on the FY2021–FY2023 lists, #25 in FY2024 and #3 in FY2025; up 2 since Aug 2024–Jul 2025.
2	Shionogi & Company Limited Through Shionogi Inc. Top agencies HHS (Department of Health and Human Services)	$119,160,688	5.9%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
3	Start2 Group, Inc. Top agencies HHS (Department of Health and Human Services)	$117,505,224	5.8%	Rank history: not on the FY2021–FY2023 lists, #12 in FY2024 and #1 in FY2025; up 13 since Aug 2024–Jul 2025.
4	L3Harris Technologies, Inc. Through L3 Technologies, Inc. Top agencies Navy (Department of the Navy)	$85,500,000	4.2%	Rank history: #3 in FY2021, not on the FY2022–FY2023 lists, #7 in FY2024 and #5 in FY2025; down 2 since Aug 2024–Jul 2025.
5	Basilea Pharmaceutica AG Through Basilea Pharmaceutica International Ltd, Allschwil Top agencies HHS (Department of Health and Human Services)	$74,146,689	3.6%	Rank history: not on the FY2021–FY2023 lists, #16 in FY2024 and #7 in FY2025; down 1 since Aug 2024–Jul 2025.
6	Amgen USA Inc Top agencies HHS (Department of Health and Human Services)	$59,988,840	2.9%	Rank history: not on the FY2021–FY2023 lists, #5 in FY2024 and #2 in FY2025; down 5 since Aug 2024–Jul 2025.
7	Cidara Therapeutics Inc. Top agencies HHS (Department of Health and Human Services)	$58,051,984	2.9%	Rank history: not on the FY2021–FY2024 lists and #8 in FY2025; new, not ranked in Aug 2024–Jul 2025.
8	Public Health Vaccines LLC Top agencies HHS (Department of Health and Human Services)	$52,936,200	2.6%	Rank history: #24 in FY2021, not on the FY2022 list, #73 in FY2023, #55 in FY2024 and #24 in FY2025; up 52 since Aug 2024–Jul 2025.
9	Battelle Memorial Institute Top agencies HHS (Department of Health and Human Services) DARPA (Defense Advanced Research Projects Agency)	$50,374,350	2.5%	Rank history: #43 in FY2021, #38 in FY2022, #26 in FY2023, #15 in FY2024 and #4 in FY2025; up 2 since Aug 2024–Jul 2025.
10	Ossium Health Inc. Top agencies HHS (Department of Health and Human Services)	$39,993,959	2.0%	Rank history: not on the FY2021–FY2023 lists, #22 in FY2024 and not on the FY2025 list; up 15 since Aug 2024–Jul 2025.
11	The Boeing Company Top agencies MDA (DOD Missile Defense Agency)	$38,055,679	1.9%	Rank history: #1 in FY2021, #1 in FY2022, #5 in FY2023, #3 in FY2024 and #6 in FY2025; down 5 since Aug 2024–Jul 2025.
12	L3 Technologies, Inc. Top agencies Navy (Department of the Navy)	$37,362,638	1.8%	Rank history: not on the FY2021–FY2024 lists and #66 in FY2025; new, not ranked in Aug 2024–Jul 2025.
13	Mapp Biopharmaceutical, Inc. Top agencies HHS (Department of Health and Human Services)	$35,807,639	1.8%	Rank history: not on the FY2021 list, #3 in FY2022, #13 in FY2023, #95 in FY2024 and #10 in FY2025; down 3 since Aug 2024–Jul 2025.
14	Vericel Corporation Top agencies HHS (Department of Health and Human Services)	$34,880,932	1.7%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
15	Cerus Corporation Top agencies HHS (Department of Health and Human Services)	$33,237,040	1.6%	Rank history: not on the FY2021–FY2023 lists, #14 in FY2024 and not on the FY2025 list; up 3 since Aug 2024–Jul 2025.
16	Spectral MD Inc. Top agencies HHS (Department of Health and Human Services)	$31,671,140	1.6%	Rank history: not on the FY2021–FY2022 lists, #15 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
17	PPD Development LP Top agencies HHS (Department of Health and Human Services)	$31,124,352	1.5%	Rank history: not on the FY2021–FY2023 lists, #4 in FY2024 and #86 in FY2025; up 24 since Aug 2024–Jul 2025.
18	Leidos Holdings, Inc. 2 awardees, including Leidos, Inc. Top agencies Navy (Department of the Navy) DHA (Defense Health Agency) DARPA (Defense Advanced Research Projects Agency)	$27,965,793	1.4%	Rank history: #22 in FY2021, #37 in FY2022, #55 in FY2023, #35 in FY2024 and #13 in FY2025; up 3 since Aug 2024–Jul 2025.
19	Sanofi Pasteur Inc. Through Sanofi Vaccines US Inc. Top agencies HHS (Department of Health and Human Services)	$26,442,894	1.3%	Rank history: not on the FY2021–FY2023 lists, #26 in FY2024 and #14 in FY2025; up 13 since Aug 2024–Jul 2025.
20	Locus Biosciences Inc. Top agencies HHS (Department of Health and Human Services)	$25,895,865	1.3%	Rank history: not on the FY2021 list, #62 in FY2022, #56 in FY2023, #18 in FY2024 and #15 in FY2025; up 45 since Aug 2024–Jul 2025.
21	PGI Holding Corporation Through Psychogenics Inc. Top agencies HHS (Department of Health and Human Services)	$24,263,665	1.2%	Rank history: not on the FY2021–FY2024 lists and #41 in FY2025; new, not ranked in Aug 2024–Jul 2025.
22	Analytic Services Inc. Through Advanced Technology International Top agencies HHS (Department of Health and Human Services)	$23,000,000	1.1%	Rank history: not on the FY2021–FY2022 lists, #1 in FY2023, #1 in FY2024 and not on the FY2025 list; new, not ranked in Aug 2024–Jul 2025.
23	SNA International LLC Top agencies DHA (Defense Health Agency)	$22,108,584	1.1%	Rank history: not on the FY2021–FY2023 lists, #44 in FY2024 and #21 in FY2025; up 3 since Aug 2024–Jul 2025.
24	Melinta Therapeutics, LLC Top agencies HHS (Department of Health and Human Services)	$21,335,789	1.0%	Rank history: not on the FY2021–FY2022 lists, #29 in FY2023, #67 in FY2024 and #19 in FY2025; up 57 since Aug 2024–Jul 2025.
25	Abbott Laboratories Top agencies HHS (Department of Health and Human Services)	$21,014,610	1.0%	Rank history: #46 in FY2021, #16 in FY2022, not on the FY2023–FY2024 lists and #26 in FY2025; up 3 since Aug 2024–Jul 2025.
26	Prenosis, Inc. Top agencies HHS (Department of Health and Human Services)	$20,000,000	1.0%	Rank history: not on the FY2021–FY2024 lists and #23 in FY2025; new, not ranked in Aug 2024–Jul 2025.
27	The Chenega Corporation 3 awardees, including Chenega Professional & Technical Services LLC, Chenega Services & Federal Solutions, LLC and Chenega Reliable Services LLC Top agencies DHA (Defense Health Agency)	$19,938,797	1.0%	Rank history: not on the FY2021–FY2024 lists and #39 in FY2025; new, not ranked in Aug 2024–Jul 2025.
28	Emergent Biosolutions Inc. 2 awardees, including Emergent Biodefense Operations Lansing LLC and Emergent Product Development Gaithersburg Inc. Top agencies HHS (Department of Health and Human Services)	$19,475,712	1.0%	Rank history: not on the FY2021–FY2023 lists, #10 in FY2024 and #11 in FY2025; down 21 since Aug 2024–Jul 2025.
29	Technical Resources International, Inc. Top agencies HHS (Department of Health and Human Services)	$18,920,904	0.9%	Rank history: not on the FY2021–FY2022 lists, #4 in FY2023, #11 in FY2024 and #20 in FY2025; down 17 since Aug 2024–Jul 2025.
30	Paratek Pharmaceuticals, Inc. Top agencies HHS (Department of Health and Human Services)	$17,471,250	0.9%	Rank history: #6 in FY2021, not on the FY2022 list, #18 in FY2023, #28 in FY2024 and #70 in FY2025; up 46 since Aug 2024–Jul 2025.
31	Innovative Defense Technologies LLC Top agencies Navy (Department of the Navy)	$16,246,960	0.8%	Rank history: not on the FY2021–FY2023 lists, #68 in FY2024 and #65 in FY2025; up 65 since Aug 2024–Jul 2025.
32	Bering Straits Native Corporation 2 awardees, including Kapili Services, LLC and Laulima Government Solutions, LLC Top agencies DHA (Defense Health Agency)	$15,596,851	0.8%	Rank history: not on the FY2021–FY2024 lists and #43 in FY2025; new, not ranked in Aug 2024–Jul 2025.
33	General Dynamics Corporation 2 awardees, including General Dynamics Information Technology, Inc. and Applied Physical Sciences Corp Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$15,334,750	0.8%	Rank history: not on the FY2021–FY2022 lists, #48 in FY2023, #72 in FY2024 and #62 in FY2025; up 45 since Aug 2024–Jul 2025.
34	Goldbelt, Incorporated 3 awardees, including Goldbelt C6, LLC, Goldbelt Apex, LLC and Goldbelt Frontier, LLC Top agencies DHA (Defense Health Agency) Navy (Department of the Navy) USDA (Department of Agriculture)	$15,310,977	0.8%	Rank history: not on the FY2021–FY2024 lists and #27 in FY2025; new, not ranked in Aug 2024–Jul 2025.
35	Avian, LLC Top agencies Navy (Department of the Navy)	$14,635,221	0.7%	Rank history: not on the FY2021 list, #39 in FY2022, #40 in FY2023, #37 in FY2024 and #33 in FY2025; up 2 since Aug 2024–Jul 2025.
36	Applied Research Associates, Inc. Top agencies DTRA (Defense Threat Reduction Agency) Navy (Department of the Navy)	$13,528,184	0.7%	Rank history: not on the FY2021 list, #90 in FY2022, #35 in FY2023, #33 in FY2024 and #18 in FY2025; down 14 since Aug 2024–Jul 2025.
37	Personalis, Inc. Top agencies VA (Department of Veterans Affairs)	$13,497,527	0.7%	Rank history: not on the FY2021 list, #45 in FY2022, #57 in FY2023, #54 in FY2024 and #31 in FY2025; up 18 since Aug 2024–Jul 2025.
38	Rafa Laboratories Ltd Top agencies HHS (Department of Health and Human Services)	$13,437,694	0.7%	Rank history: not on the FY2021–FY2022 lists, #58 in FY2023, not on the FY2024 list and #32 in FY2025; new, not ranked in Aug 2024–Jul 2025.
39	Johns Hopkins University 2 awardees, including The Johns Hopkins University Applied Physics Laboratory LLC Top agencies HHS (Department of Health and Human Services) DHA (Defense Health Agency) Army (Department of the Army)	$11,804,918	0.6%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
40	The Leland Stanford Junior University 2 awardees Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$11,691,139	0.6%	Rank history: not on the FY2021 list, #67 in FY2022, #41 in FY2023, #27 in FY2024 and #40 in FY2025; down 2 since Aug 2024–Jul 2025.
41	Crossject SA Top agencies HHS (Department of Health and Human Services)	$11,291,005	0.6%	Rank history: not on the FY2021 list, #5 in FY2022, not on the FY2023–FY2024 lists and #35 in FY2025; new, not ranked in Aug 2024–Jul 2025.
42	Trustees of Boston University Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$10,823,272	0.5%	Rank history: not on the FY2021 list, #22 in FY2022, #12 in FY2023, #20 in FY2024 and #12 in FY2025; down 27 since Aug 2024–Jul 2025.
43	RTX Corporation 5 awardees, including Raytheon Company, Rockwell Collins, Inc. and RTX BBN Technologies, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency)	$10,578,883	0.5%	Rank history: not on the FY2021–FY2023 lists, #40 in FY2024 and #34 in FY2025; up 13 since Aug 2024–Jul 2025.
44	Knowesis, Inc. Top agencies DHA (Defense Health Agency)	$10,146,577	0.5%	Rank history: not on the FY2021–FY2023 lists, #82 in FY2024 and #58 in FY2025; up 19 since Aug 2024–Jul 2025.
45	Thermo Fisher Scientific Inc. 2 awardees, including Fisher Bioservices Inc. and Life Technologies Corporation Top agencies HHS (Department of Health and Human Services)	$10,008,851	0.5%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
46	STI Legacy, Inc. Top agencies NASA (National Aeronautics and Space Administration)	$9,968,158	0.5%	Rank history: not on the FY2021–FY2024 lists and #56 in FY2025; up 23 since Aug 2024–Jul 2025.
47	Seattle Children's Hospital Top agencies HHS (Department of Health and Human Services)	$9,576,646	0.5%	Rank history: not on the FY2021–FY2024 lists and #42 in FY2025; up 35 since Aug 2024–Jul 2025.
48	University of California, LOS Angeles Top agencies HHS (Department of Health and Human Services)	$9,188,827	0.5%	Rank history: not on the FY2021–FY2024 lists and #44 in FY2025; new, not ranked in Aug 2024–Jul 2025.
49	University System of Maryland 2 awardees, including University of Maryland, Baltimore and University of Maryland, College Park Top agencies HHS (Department of Health and Human Services) DARPA (Defense Advanced Research Projects Agency) VA (Department of Veterans Affairs)	$9,073,856	0.4%	Rank history: #53 in FY2021, #75 in FY2022, #66 in FY2023, not on the FY2024 list and #36 in FY2025; new, not ranked in Aug 2024–Jul 2025.
50	Advanced Systems Supportability Engineering Technologies and Tools, Inc. Top agencies Navy (Department of the Navy)	$8,902,811	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
51	Orexo AB Through Orexo US Inc. Top agencies HHS (Department of Health and Human Services)	$8,450,715	0.4%	Rank history: not on the FY2021–FY2024 lists and #46 in FY2025; new, not ranked in Aug 2024–Jul 2025.
52	Rho Federal Systems Division Inc. Top agencies HHS (Department of Health and Human Services)	$8,000,000	0.4%	Rank history: not on the FY2021–FY2024 lists and #50 in FY2025; up 1 since Aug 2024–Jul 2025.
53	The Broad Institute, Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$7,469,200	0.4%	Rank history: not on the FY2021–FY2022 lists, #44 in FY2023, #56 in FY2024 and #53 in FY2025; up 9 since Aug 2024–Jul 2025.
54	Innovation Development Institute Inc. Top agencies HHS (Department of Health and Human Services)	$7,368,462	0.4%	Rank history: not on the FY2021–FY2024 lists and #54 in FY2025; up 73 since Aug 2024–Jul 2025.
55	Duke University Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs) Navy (Department of the Navy)	$6,510,480	0.3%	Rank history: #33 in FY2021, #30 in FY2022, #36 in FY2023, #30 in FY2024 and #57 in FY2025; down 9 since Aug 2024–Jul 2025.
56	GE Medical Systems Information Technologies, Inc. Top agencies HHS (Department of Health and Human Services)	$6,500,205	0.3%	Rank history: not on the FY2021–FY2022 lists, #23 in FY2023, #57 in FY2024 and #16 in FY2025; down 42 since Aug 2024–Jul 2025.
57	Science Applications International Corporation Top agencies USAF (Department of the Air Force)	$6,346,278	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
58	Cherokee Nation Through Cherokee Nation Operational Solutions, L.L.C. Top agencies DHA (Defense Health Agency)	$6,250,934	0.3%	Rank history: not on the FY2021–FY2024 lists and #69 in FY2025; new, not ranked in Aug 2024–Jul 2025.
59	Culmen International, LLC Top agencies DHA (Defense Health Agency)	$6,238,427	0.3%	Rank history: not on the FY2021–FY2025 lists; up 122 since Aug 2024–Jul 2025.
60	Lumos Diagnostics, Inc. Top agencies HHS (Department of Health and Human Services)	$6,198,459	0.3%	Rank history: not on the FY2021–FY2023 lists, #100 in FY2024 and #60 in FY2025; up 43 since Aug 2024–Jul 2025.
61	University of Texas System 4 awardees, including University of Texas Medical Branch At Galveston, The Univeristy of Texas M.d. Anderson Cancer Center and The University of Texas Health Science Center At San Antonio Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$6,157,017	0.3%	Rank history: #54 in FY2021, not on the FY2022 list, #92 in FY2023, not on the FY2024 list and #78 in FY2025; new, not ranked in Aug 2024–Jul 2025.
62	Regents of the University of Michigan Top agencies HHS (Department of Health and Human Services) DARPA (Defense Advanced Research Projects Agency)	$5,697,958	0.3%	Rank history: not on the FY2021 list, #72 in FY2022, #68 in FY2023, #42 in FY2024 and #61 in FY2025; up 5 since Aug 2024–Jul 2025.
63	The Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc. Top agencies USUHS (DOD Uniformed Services University of the Health Sciences) DHA (Defense Health Agency)	$5,334,050	0.3%	Rank history: not on the FY2021–FY2023 lists, #32 in FY2024 and #51 in FY2025; down 20 since Aug 2024–Jul 2025.
64	Potomacwave, Inc. Top agencies DHA (Defense Health Agency)	$5,042,146	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
65	Odyssey Systems Consulting Group, Ltd. Top agencies DHA (Defense Health Agency) Navy (Department of the Navy)	$4,857,076	0.2%	Rank history: not on the FY2021–FY2024 lists and #72 in FY2025; up 26 since Aug 2024–Jul 2025.
66	Northwestern University 2 awardees Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$4,754,897	0.2%	Rank history: not on the FY2021 list, #61 in FY2022, #69 in FY2023, #65 in FY2024 and #75 in FY2025; up 11 since Aug 2024–Jul 2025.
67	Wake Forest University Through Wake Forest University Health Sciences Top agencies HHS (Department of Health and Human Services)	$4,694,720	0.2%	Rank history: not on the FY2021–FY2024 lists and #74 in FY2025; new, not ranked in Aug 2024–Jul 2025.
68	Redwire Space Technologies, Inc. Top agencies NASA (National Aeronautics and Space Administration)	$4,560,172	0.2%	Rank history: not on the FY2021–FY2024 lists and #100 in FY2025; new, not ranked in Aug 2024–Jul 2025.
69	Texas Biomedical Research Institute Top agencies HHS (Department of Health and Human Services)	$4,535,752	0.2%	Rank history: not on the FY2021–FY2024 lists and #76 in FY2025; up 267 since Aug 2024–Jul 2025.
70	University of Illinois 2 awardees Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$3,932,691	0.2%	Rank history: not on the FY2021–FY2024 lists and #87 in FY2025; up 299 since Aug 2024–Jul 2025.
71	Physical Sciences Inc. Top agencies HHS (Department of Health and Human Services) DARPA (Defense Advanced Research Projects Agency)	$3,834,157	0.2%	Rank history: #72 in FY2021, #71 in FY2022, #81 in FY2023 and not on the FY2024–FY2025 lists; up 106 since Aug 2024–Jul 2025.
72	University of Montana Top agencies HHS (Department of Health and Human Services)	$3,796,000	0.2%	Rank history: not on the FY2021–FY2025 lists; up 47 since Aug 2024–Jul 2025.
73	Kaleo, Inc. Top agencies HHS (Department of Health and Human Services)	$3,784,396	0.2%	Rank history: not on the FY2021–FY2023 lists, #90 in FY2024 and #17 in FY2025; down 53 since Aug 2024–Jul 2025.
74	Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek TNO Top agencies HHS (Department of Health and Human Services)	$3,720,333	0.2%	Rank history: not on the FY2021–FY2024 lists and #82 in FY2025; up 236 since Aug 2024–Jul 2025.
75	President and Fellows of Harvard College 2 awardees Top agencies HHS (Department of Health and Human Services)	$3,702,853	0.2%	Rank history: #34 in FY2021, #49 in FY2022, #25 in FY2023, not on the FY2024 list and #84 in FY2025; new, not ranked in Aug 2024–Jul 2025.
76	Invirsa, Inc. Top agencies HHS (Department of Health and Human Services)	$3,641,138	0.2%	Rank history: #80 in FY2021, not on the FY2022–FY2024 lists and #30 in FY2025; down 40 since Aug 2024–Jul 2025.
77	The Bionetics Corporation Top agencies HHS (Department of Health and Human Services)	$3,609,482	0.2%	Rank history: not on the FY2021–FY2023 lists, #69 in FY2024 and #81 in FY2025; up 12 since Aug 2024–Jul 2025.
78	Chromologic LLC Top agencies HHS (Department of Health and Human Services)	$3,399,664	0.2%	Rank history: not on the FY2021–FY2025 lists; up 60 since Aug 2024–Jul 2025.
79	Biofire Defense LLC 2 awardees Top agencies HHS (Department of Health and Human Services) DOS (Department of State)	$3,365,820	0.2%	Rank history: not on the FY2021–FY2024 lists and #94 in FY2025; new, not ranked in Aug 2024–Jul 2025.
80	DLH Holdings Corp 2 awardees, including Irving Burton Associates, LLC Top agencies DHA (Defense Health Agency)	$3,305,797	0.2%	Rank history: not on the FY2021–FY2024 lists and #95 in FY2025; new, not ranked in Aug 2024–Jul 2025.
81	Emory University Top agencies HHS (Department of Health and Human Services)	$3,237,237	0.2%	Rank history: #66 in FY2021, #83 in FY2022, #98 in FY2023, not on the FY2024 list and #93 in FY2025; up 23 since Aug 2024–Jul 2025.
82	Glaxosmithkline, LLC Top agencies HHS (Department of Health and Human Services)	$3,209,550	0.2%	Rank history: not on the FY2021–FY2025 lists; down 63 since Aug 2024–Jul 2025.
83	Ministry of Defence Top agencies DTRA (Defense Threat Reduction Agency)	$3,202,909	0.2%	Rank history: not on the FY2021–FY2025 lists; up 52 since Aug 2024–Jul 2025.
84	Eitr Biologics, Inc. Top agencies HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$3,186,250	0.2%	Rank history: not on the FY2021–FY2024 lists and #64 in FY2025; down 18 since Aug 2024–Jul 2025.
85	DNA Hive LLC Top agencies HHS (Department of Health and Human Services)	$3,090,715	0.2%	Rank history: not on the FY2021–FY2024 lists and #91 in FY2025; new, not ranked in Aug 2024–Jul 2025.
86	Aerovironment, Inc. 2 awardees, including Bluehalo LLC Top agencies USAF (Department of the Air Force)	$2,995,853	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
87	Infinity Biologix LLC Top agencies HHS (Department of Health and Human Services)	$2,957,934	0.1%	Rank history: #28 in FY2021, not on the FY2022–FY2024 lists and #96 in FY2025; up 21 since Aug 2024–Jul 2025.
88	National Stem Cell Foundation Inc. Top agencies NASA (National Aeronautics and Space Administration)	$2,883,952	0.1%	Rank history: not on the FY2021–FY2025 lists; up 98 since Aug 2024–Jul 2025.
89	Mass General Brigham Incorporated 2 awardees, including The Mclean Hospital Corporation Top agencies HHS (Department of Health and Human Services)	$2,852,572	0.1%	Rank history: not on the FY2021–FY2023 lists, #84 in FY2024 and not on the FY2025 list; down 18 since Aug 2024–Jul 2025.
90	Abss Solutions Inc. Top agencies DHA (Defense Health Agency)	$2,840,895	0.1%	Rank history: #10 in FY2021, #14 in FY2022, not on the FY2023 list, #34 in FY2024 and #71 in FY2025; down 59 since Aug 2024–Jul 2025.
91	University of California Irvine Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$2,799,217	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
92	La Jolla Institute for Immunology Top agencies HHS (Department of Health and Human Services)	$2,611,909	0.1%	Rank history: #62 in FY2021, #77 in FY2022, not on the FY2023 list, #63 in FY2024 and #67 in FY2025; down 22 since Aug 2024–Jul 2025.
93	The Translational Genomics Research Institute Top agencies HHS (Department of Health and Human Services)	$2,583,244	0.1%	Rank history: not on the FY2021–FY2025 lists; up 56 since Aug 2024–Jul 2025.
94	Parsons Corporation Through Parsons Government Services Inc. Top agencies Navy (Department of the Navy)	$2,366,240	0.1%	Rank history: not on the FY2021–FY2024 lists and #73 in FY2025; down 14 since Aug 2024–Jul 2025.
95	Florida State University Top agencies HHS (Department of Health and Human Services)	$2,277,208	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
96	Amgen Inc. Top agencies HHS (Department of Health and Human Services)	$2,276,291	0.1%	Rank history: not on the FY2021 list, #2 in FY2022, #6 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
97	American Type Culture Collection Top agencies HHS (Department of Health and Human Services)	$2,189,338	0.1%	Rank history: not on the FY2021–FY2025 lists; up 67 since Aug 2024–Jul 2025.
98	Medigen, Inc. Top agencies HHS (Department of Health and Human Services)	$2,181,107	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
99	New York University Top agencies DARPA (Defense Advanced Research Projects Agency)	$2,166,887	0.1%	Rank history: not on the FY2021–FY2024 lists and #99 in FY2025; new, not ranked in Aug 2024–Jul 2025.
100	Optosurgical, LLC Top agencies HHS (Department of Health and Human Services)	$2,095,748	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.

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 $2.04 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. An awardee whose own actions mostly name no parent, and that no other company's actions name as their parent, rolls up its SAM.gov registration's chain of parent companies: it counts under the first company there that other companies' actions name as their parent, or under the parent most of a company's own actions name, whichever comes first; with neither, under the highest company in the chain with federal contracts of its own. Joint ventures stay companies of their own. 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.
• Period: the trailing 12 months end with the last month that ended at least 90 days ago, because the Department of Defense reports its contract actions to FPDS about 90 days late. The list is rebuilt each night.
• Rank changes compare with Aug 2024–Jul 2025. "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.
• Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

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