Top 100 Contractors in PSC AN13: Health R&D Services; Health Care Services; Experimental Development, Aug 2025–Jul 2026

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Shionogi & Company Limited Through Shionogi Inc. Top agencies HHS (Department of Health and Human Services)	$119,160,688	12.8%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
2	Amgen USA Inc Top agencies HHS (Department of Health and Human Services)	$59,988,840	6.5%	Rank history: not on the FY2021–FY2023 lists, #1 in FY2024 and #1 in FY2025; down 1 since Aug 2024–Jul 2025.
3	Public Health Vaccines LLC Top agencies HHS (Department of Health and Human Services)	$52,936,200	5.7%	Rank history: #15 in FY2021, #81 in FY2022, #35 in FY2023, #22 in FY2024 and #15 in FY2025; up 24 since Aug 2024–Jul 2025.
4	Battelle Memorial Institute 2 awardees Top agencies HHS (Department of Health and Human Services) Army (Department of the Army)	$40,030,649	4.3%	Rank history: #9 in FY2021, #16 in FY2022, #18 in FY2023, #14 in FY2024 and #4 in FY2025; up 7 since Aug 2024–Jul 2025.
5	University of Illinois 2 awardees Top agencies HHS (Department of Health and Human Services)	$31,800,859	3.4%	Rank history: not on the FY2021–FY2024 lists and #5 in FY2025; new, not ranked in Aug 2024–Jul 2025.
6	Safetraces Inc Top agencies HHS (Department of Health and Human Services)	$24,243,802	2.6%	Rank history: not on the FY2021–FY2024 lists and #8 in FY2025; new, not ranked in Aug 2024–Jul 2025.
7	Biolytical Laboratories Inc. Top agencies DHA (Defense Health Agency) Army (Department of the Army)	$23,692,418	2.6%	Rank history: not on the FY2021–FY2023 lists, #33 in FY2024 and #31 in FY2025; up 27 since Aug 2024–Jul 2025.
8	Westat, Inc. Top agencies HHS (Department of Health and Human Services)	$22,200,000	2.4%	Rank history: not on the FY2021 list, #12 in FY2022, #13 in FY2023, #7 in FY2024 and #9 in FY2025; up 1 since Aug 2024–Jul 2025.
9	Abbott Laboratories Top agencies HHS (Department of Health and Human Services)	$21,014,610	2.3%	Rank history: #22 in FY2021, #5 in FY2022, #71 in FY2023, #78 in FY2024 and #12 in FY2025; up 3 since Aug 2024–Jul 2025.
10	Mayo Clinic Top agencies HHS (Department of Health and Human Services)	$21,008,442	2.3%	Rank history: not on the FY2021–FY2024 lists and #10 in FY2025; new, not ranked in Aug 2024–Jul 2025.
11	Virginia Commonwealth University Health System Authority Through Virginia Polytechnic Institute & State University Top agencies HHS (Department of Health and Human Services)	$20,308,180	2.2%	Rank history: not on the FY2021–FY2024 lists and #11 in FY2025; new, not ranked in Aug 2024–Jul 2025.
12	Prenosis, Inc. Top agencies HHS (Department of Health and Human Services)	$20,000,000	2.2%	Rank history: not on the FY2021–FY2022 lists, #80 in FY2023, not on the FY2024 list and #13 in FY2025; new, not ranked in Aug 2024–Jul 2025.
13	Poppy Health, Inc. Top agencies HHS (Department of Health and Human Services)	$19,601,012	2.1%	Rank history: not on the FY2021–FY2024 lists and #14 in FY2025; new, not ranked in Aug 2024–Jul 2025.
14	Basilea Pharmaceutica AG Through Basilea Pharmaceutica International Ltd, Allschwil Top agencies HHS (Department of Health and Human Services)	$19,321,270	2.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
15	Kernal Biologics, Inc. Top agencies HHS (Department of Health and Human Services)	$18,177,254	2.0%	Rank history: not on the FY2021–FY2024 lists and #17 in FY2025; new, not ranked in Aug 2024–Jul 2025.
16	Locus Biosciences Inc. Top agencies HHS (Department of Health and Human Services)	$18,000,000	1.9%	Rank history: not on the FY2021 list, #25 in FY2022, #28 in FY2023, #5 in FY2024 and #7 in FY2025; up 14 since Aug 2024–Jul 2025.
17	North Dakota University System Through University of North Dakota Top agencies HHS (Department of Health and Human Services)	$16,952,932	1.8%	Rank history: not on the FY2021–FY2024 lists and #19 in FY2025; new, not ranked in Aug 2024–Jul 2025.
18	Danaher Corporation 3 awardees, including Global Life Sciences Solutions USA LLC and Cepheid Top agencies HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$16,548,561	1.8%	Rank history: not on the FY2021–FY2023 lists, #32 in FY2024 and #16 in FY2025; up 10 since Aug 2024–Jul 2025.
19	Flosonics Medical LLC Top agencies HHS (Department of Health and Human Services)	$15,002,035	1.6%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
20	Marpam Pharma LLC Top agencies HHS (Department of Health and Human Services)	$14,131,077	1.5%	Rank history: not on the FY2021–FY2024 lists and #22 in FY2025; new, not ranked in Aug 2024–Jul 2025.
21	Hoffmann-La Roche Inc. Top agencies HHS (Department of Health and Human Services)	$13,750,000	1.5%	Rank history: not on the FY2021–FY2024 lists and #3 in FY2025; new, not ranked in Aug 2024–Jul 2025.
22	Tessera Therapeutics, Inc. Top agencies HHS (Department of Health and Human Services)	$11,891,248	1.3%	Rank history: not on the FY2021–FY2024 lists and #26 in FY2025; new, not ranked in Aug 2024–Jul 2025.
23	University of Pittsburgh - of the Commonwealth System of Higher Education Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$11,829,998	1.3%	Rank history: #31 in FY2021, #22 in FY2022, #46 in FY2023, #38 in FY2024 and #23 in FY2025; up 55 since Aug 2024–Jul 2025.
24	Crossject SA Top agencies HHS (Department of Health and Human Services)	$11,291,005	1.2%	Rank history: not on the FY2021–FY2024 lists and #28 in FY2025; new, not ranked in Aug 2024–Jul 2025.
25	Immunovec, Inc. Top agencies HHS (Department of Health and Human Services)	$11,049,460	1.2%	Rank history: not on the FY2021–FY2024 lists and #30 in FY2025; new, not ranked in Aug 2024–Jul 2025.
26	Terasaki Institute for Biomedical Innovation Top agencies HHS (Department of Health and Human Services)	$10,259,311	1.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
27	Lacristat LLC Top agencies HHS (Department of Health and Human Services)	$9,628,264	1.0%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
28	The Trustees of Columbia University In the City of New York Top agencies HHS (Department of Health and Human Services)	$9,364,971	1.0%	Rank history: #48 in FY2021 and not on the FY2022–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
29	Theradex Systems, Inc. Top agencies HHS (Department of Health and Human Services)	$9,307,613	1.0%	Rank history: not on the FY2021 list, #23 in FY2022, #25 in FY2023, #19 in FY2024 and #34 in FY2025; down 6 since Aug 2024–Jul 2025.
30	University of California, LOS Angeles Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$9,192,077	1.0%	Rank history: not on the FY2021–FY2024 lists and #33 in FY2025; up 66 since Aug 2024–Jul 2025.
31	Technical Resources International, Inc. Top agencies HHS (Department of Health and Human Services)	$9,036,140	1.0%	Rank history: #11 in FY2021, #21 in FY2022, #27 in FY2023, #80 in FY2024 and #35 in FY2025; up 49 since Aug 2024–Jul 2025.
32	The Emmes Company, LLC Top agencies HHS (Department of Health and Human Services)	$9,000,000	1.0%	Rank history: #19 in FY2021, #24 in FY2022, #24 in FY2023, #18 in FY2024 and #32 in FY2025; down 10 since Aug 2024–Jul 2025.
33	Orexo AB Through Orexo US Inc. Top agencies HHS (Department of Health and Human Services)	$8,450,715	0.9%	Rank history: not on the FY2021–FY2024 lists and #37 in FY2025; new, not ranked in Aug 2024–Jul 2025.
34	Strm.bio Incorporated Top agencies HHS (Department of Health and Human Services)	$8,375,271	0.9%	Rank history: not on the FY2021–FY2024 lists and #38 in FY2025; new, not ranked in Aug 2024–Jul 2025.
35	The Commonwealth of Massachusetts Through Northeastern University Top agencies HHS (Department of Health and Human Services)	$7,968,548	0.9%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
36	Isola Therapeutics Inc. Top agencies HHS (Department of Health and Human Services)	$7,485,417	0.8%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
37	IX Biopharma Ltd. Top agencies Army (Department of the Army)	$7,127,731	0.8%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
38	Siemens Corporation Through Siemens Medical Solutions Usa, Inc. Top agencies HHS (Department of Health and Human Services)	$6,916,711	0.7%	Rank history: not on the FY2021–FY2024 lists and #41 in FY2025; new, not ranked in Aug 2024–Jul 2025.
39	University of Southern California Top agencies HHS (Department of Health and Human Services)	$6,842,620	0.7%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
40	GE Medical Systems Information Technologies, Inc. Top agencies HHS (Department of Health and Human Services)	$6,500,205	0.7%	Rank history: not on the FY2021–FY2022 lists, #11 in FY2023, #20 in FY2024 and #6 in FY2025; down 34 since Aug 2024–Jul 2025.
41	The Boeing Company Through HRL Laboratories, LLC Top agencies HHS (Department of Health and Human Services)	$6,449,893	0.7%	Rank history: not on the FY2021–FY2024 lists and #43 in FY2025; new, not ranked in Aug 2024–Jul 2025.
42	Mucommune LLC Top agencies HHS (Department of Health and Human Services)	$6,146,970	0.7%	Rank history: not on the FY2021–FY2024 lists and #45 in FY2025; new, not ranked in Aug 2024–Jul 2025.
43	Yale Univ Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$5,127,309	0.6%	Rank history: not on the FY2021–FY2024 lists and #47 in FY2025; new, not ranked in Aug 2024–Jul 2025.
44	Massachusetts Institute of Technology Top agencies HHS (Department of Health and Human Services)	$5,076,134	0.5%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
45	Texas Biomedical Research Institute Top agencies HHS (Department of Health and Human Services)	$4,535,752	0.5%	Rank history: not on the FY2021–FY2022 lists, #50 in FY2023, #85 in FY2024 and #49 in FY2025; up 44 since Aug 2024–Jul 2025.
46	The Children's Hospital Corporation Top agencies HHS (Department of Health and Human Services)	$4,499,741	0.5%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
47	Harvard College President & Fellows Of Through President and Fellows of Harvard College Top agencies HHS (Department of Health and Human Services)	$4,399,574	0.5%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
48	The Vanderbilt University Top agencies HHS (Department of Health and Human Services)	$4,294,748	0.5%	Rank history: not on the FY2021–FY2024 lists and #50 in FY2025; new, not ranked in Aug 2024–Jul 2025.
49	Galois, Inc. Top agencies HHS (Department of Health and Human Services)	$4,187,046	0.5%	Rank history: not on the FY2021–FY2024 lists and #51 in FY2025; new, not ranked in Aug 2024–Jul 2025.
50	University System of Maryland Through University of Maryland, Baltimore Top agencies HHS (Department of Health and Human Services)	$3,909,795	0.4%	Rank history: not on the FY2021–FY2022 lists, #38 in FY2023, not on the FY2024 list and #52 in FY2025; new, not ranked in Aug 2024–Jul 2025.
51	The Leland Stanford Junior University Top agencies HHS (Department of Health and Human Services)	$3,858,191	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
52	Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek TNO Top agencies HHS (Department of Health and Human Services)	$3,720,333	0.4%	Rank history: not on the FY2021–FY2024 lists and #54 in FY2025; new, not ranked in Aug 2024–Jul 2025.
53	Biofire Defense LLC Top agencies HHS (Department of Health and Human Services)	$3,576,239	0.4%	Rank history: not on the FY2021–FY2023 lists, #89 in FY2024 and #56 in FY2025; up 38 since Aug 2024–Jul 2025.
54	Physical Sciences Inc. Top agencies HHS (Department of Health and Human Services)	$3,499,996	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
55	Zigguratum, Inc. Top agencies HHS (Department of Health and Human Services)	$3,499,991	0.4%	Rank history: not on the FY2021–FY2023 lists, #77 in FY2024 and not on the FY2025 list; up 22 since Aug 2024–Jul 2025.
56	Sibel Health Inc. Top agencies HHS (Department of Health and Human Services)	$3,497,930	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
57	Hawksbill LLC Top agencies HHS (Department of Health and Human Services)	$3,339,715	0.4%	Rank history: not on the FY2021–FY2024 lists and #59 in FY2025; new, not ranked in Aug 2024–Jul 2025.
58	Inhalon Biopharma, Inc. Top agencies DHA (Defense Health Agency)	$3,175,643	0.3%	Rank history: not on the FY2021–FY2024 lists and #60 in FY2025; new, not ranked in Aug 2024–Jul 2025.
59	Craniosense, Inc. Top agencies DHA (Defense Health Agency)	$3,034,774	0.3%	Rank history: not on the FY2021–FY2024 lists and #61 in FY2025; new, not ranked in Aug 2024–Jul 2025.
60	Acrocyte Therapeutics Inc. Top agencies HHS (Department of Health and Human Services)	$2,653,048	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
61	Syracuse University Top agencies HHS (Department of Health and Human Services)	$2,256,884	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
62	Optosurgical, LLC Top agencies HHS (Department of Health and Human Services)	$2,095,748	0.2%	Rank history: not on the FY2021–FY2022 lists, #31 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
63	The Trustees of the University of Pennsylvania Top agencies HHS (Department of Health and Human Services)	$2,001,309	0.2%	Rank history: not on the FY2021 list, #26 in FY2022, not on the FY2023 list, #98 in FY2024 and not on the FY2025 list; new, not ranked in Aug 2024–Jul 2025.
64	Trail of Bits Inc. Top agencies HHS (Department of Health and Human Services)	$1,951,095	0.2%	Rank history: not on the FY2021–FY2024 lists and #65 in FY2025; new, not ranked in Aug 2024–Jul 2025.
65	Synedgen, Inc. Top agencies HHS (Department of Health and Human Services)	$1,891,200	0.2%	Rank history: not on the FY2021–FY2023 lists, #10 in FY2024 and #66 in FY2025; down 52 since Aug 2024–Jul 2025.
66	University of Rochester Top agencies HHS (Department of Health and Human Services)	$1,860,109	0.2%	Rank history: not on the FY2021 list, #28 in FY2022, not on the FY2023 list, #39 in FY2024 and #67 in FY2025; down 17 since Aug 2024–Jul 2025.
67	Curia Global Inc. Top agencies HHS (Department of Health and Human Services)	$1,778,642	0.2%	Rank history: not on the FY2021–FY2022 lists, #70 in FY2023, #46 in FY2024 and #69 in FY2025; down 7 since Aug 2024–Jul 2025.
68	AD Astra Diagnostics, Inc. Top agencies HHS (Department of Health and Human Services)	$1,702,732	0.2%	Rank history: not on the FY2021–FY2023 lists, #24 in FY2024 and not on the FY2025 list; down 33 since Aug 2024–Jul 2025.
69	Rafa Laboratories Ltd Top agencies HHS (Department of Health and Human Services)	$1,670,282	0.2%	Rank history: #30 in FY2021, #50 in FY2022, #30 in FY2023, not on the FY2024 list and #70 in FY2025; new, not ranked in Aug 2024–Jul 2025.
70	Hemoglobin Oxygen Therapeutics LLC Top agencies DHA (Defense Health Agency)	$1,607,385	0.2%	Rank history: not on the FY2021–FY2024 lists and #36 in FY2025; down 45 since Aug 2024–Jul 2025.
71	The Charles Stark Draper Laboratory, Inc. Top agencies HHS (Department of Health and Human Services)	$1,282,415	0.1%	Rank history: #56 in FY2021, not on the FY2022 list, #12 in FY2023, #21 in FY2024 and #72 in FY2025; down 47 since Aug 2024–Jul 2025.
72	University of Texas System 2 awardees, including University of Texas At Austin and The Univeristy of Texas M.d. Anderson Cancer Center Top agencies HHS (Department of Health and Human Services)	$1,165,599	0.1%	Rank history: not on the FY2021–FY2024 lists and #25 in FY2025; new, not ranked in Aug 2024–Jul 2025.
73	EDJ Associates, Inc. Top agencies HHS (Department of Health and Human Services)	$1,158,476	0.1%	Rank history: not on the FY2021 list, #55 in FY2022, #72 in FY2023, #47 in FY2024 and #75 in FY2025; down 9 since Aug 2024–Jul 2025.
74	MRIGLOBAL Top agencies HHS (Department of Health and Human Services)	$1,143,659	0.1%	Rank history: not on the FY2021–FY2022 lists, #69 in FY2023, #51 in FY2024 and #73 in FY2025; down 9 since Aug 2024–Jul 2025.
75	Mantel Technologies, Inc. Top agencies DHA (Defense Health Agency)	$1,027,602	0.1%	Rank history: not on the FY2021 list, #44 in FY2022, not on the FY2023–FY2024 lists and #78 in FY2025; new, not ranked in Aug 2024–Jul 2025.
76	The Pennsylvania State University Top agencies HHS (Department of Health and Human Services)	$982,051	0.1%	Rank history: not on the FY2021–FY2024 lists and #74 in FY2025; new, not ranked in Aug 2024–Jul 2025.
77	Sherlock Biosciences Inc. Top agencies HHS (Department of Health and Human Services)	$930,341	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
78	Dynasil Corporation of America Through Radiation Monitoring Devices, Inc. Top agencies Army (Department of the Army)	$865,836	0.1%	Rank history: not on the FY2021–FY2024 lists and #79 in FY2025; new, not ranked in Aug 2024–Jul 2025.
79	Enalare Therapeutics Inc. Top agencies HHS (Department of Health and Human Services)	$810,132	0.1%	Rank history: #52 in FY2021, #29 in FY2022, #94 in FY2023, #25 in FY2024 and not on the FY2025 list; down 43 since Aug 2024–Jul 2025.
80	Red Balloon Security, Inc. Top agencies HHS (Department of Health and Human Services)	$786,029	0.1%	Rank history: not on the FY2021–FY2024 lists and #76 in FY2025; new, not ranked in Aug 2024–Jul 2025.
81	Guidehouse Inc. Top agencies VA (Department of Veterans Affairs)	$634,278	0.1%	Rank history: not on the FY2021–FY2024 lists and #77 in FY2025; new, not ranked in Aug 2024–Jul 2025.
82	Nirsense, Inc. Top agencies HHS (Department of Health and Human Services)	$600,000	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
83	Quantitative Biosciences, Inc. Top agencies HHS (Department of Health and Human Services)	$600,000	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
84	Halcyon Biomedical Inc. Top agencies HHS (Department of Health and Human Services)	$600,000	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
85	Esperto Medical Inc. Top agencies HHS (Department of Health and Human Services)	$600,000	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
86	Heliowave Technologies Inc. Top agencies HHS (Department of Health and Human Services)	$600,000	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
87	GT Biosciences, Inc. Top agencies HHS (Department of Health and Human Services)	$599,992	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
88	TDA Research, Inc. Top agencies Navy (Department of the Navy)	$599,925	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
89	Voicelove Inc. Top agencies HHS (Department of Health and Human Services)	$599,276	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
90	Zenso Inc. Top agencies HHS (Department of Health and Human Services)	$599,251	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
91	Alethium Technologies, Inc. Top agencies HHS (Department of Health and Human Services)	$597,951	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
92	AO Technologies, Inc. Top agencies HHS (Department of Health and Human Services)	$597,088	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
93	Memsel Inc. Top agencies HHS (Department of Health and Human Services)	$593,800	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
94	University of Wisconsin System Top agencies HHS (Department of Health and Human Services)	$449,084	<0.1%	Rank history: not on the FY2021–FY2024 lists and #80 in FY2025; new, not ranked in Aug 2024–Jul 2025.
95	General Dynamics Corporation Through General Dynamics Information Technology, Inc. Top agencies DHA (Defense Health Agency)	$406,354	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
96	University of Arizona Top agencies USAF (Department of the Air Force) VA (Department of Veterans Affairs)	$223,753	<0.1%	Rank history: not on the FY2021–FY2024 lists and #82 in FY2025; down 3 since Aug 2024–Jul 2025.
97	The Tiny Cargo Company Top agencies Army (Department of the Army)	$209,574	<0.1%	Rank history: not on the FY2021–FY2024 lists and #83 in FY2025; new, not ranked in Aug 2024–Jul 2025.
98	Integrated Solutions for Systems, Inc. Top agencies Army (Department of the Army)	$199,036	<0.1%	Rank history: not on the FY2021–FY2024 lists and #88 in FY2025; new, not ranked in Aug 2024–Jul 2025.
99	Virscio, Inc. Top agencies VA (Department of Veterans Affairs)	$185,908	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
100	Neurosetta LLC Top agencies HHS (Department of Health and Human Services)	$135,000	<0.1%	Rank history: not on the FY2021–FY2024 lists and #90 in FY2025; 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 $928 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. 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.

Quick answers