Top 100 Contractors in NAICS 325413: In-Vitro Diagnostic Substance Manufacturing, Aug 2025–Jul 2026

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Danaher Corporation 7 awardees, including Cepheid, Beckman Coulter, Inc. and Beckman Coulter Gesellschaft MIT Beschraenkter Haftung Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$39,751,834	17.7%	Rank history: #4 in FY2021, #5 in FY2022, #11 in FY2023, #1 in FY2024 and #1 in FY2025; unchanged since Aug 2024–Jul 2025.
2	Biomerieux Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$29,128,985	13.0%	Rank history: #85 in FY2021, not on the FY2022–FY2023 lists, #6 in FY2024 and #4 in FY2025; up 8 since Aug 2024–Jul 2025.
3	Roche Holdings Inc. 4 awardees, including Roche Diagnostics Corporation, Roche Diabetes Care Inc. and Ventana Medical Systems, Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$23,268,226	10.4%	Rank history: not on the FY2021–FY2024 lists and #3 in FY2025; up 1 since Aug 2024–Jul 2025.
4	Thermo Fisher Scientific Inc. 9 awardees, including Fisher Scientific Company L.L.C., One Lambda, Inc. and The Binding Site. Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) Navy (Department of the Navy)	$9,213,159	4.1%	Rank history: #3 in FY2021, #15 in FY2022, #20 in FY2023, #7 in FY2024 and #6 in FY2025; up 2 since Aug 2024–Jul 2025.
5	Quest Diagnostics Incorporated Top agencies VA (Department of Veterans Affairs)	$8,023,891	3.6%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
6	Abbott Laboratories Inc. 6 awardees, including Abbott Molecular Inc. and Alere San Diego, Inc. Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$7,531,943	3.4%	Rank history: #1 in FY2021, #2 in FY2022, #3 in FY2023, #38 in FY2024 and #5 in FY2025; down 1 since Aug 2024–Jul 2025.
7	Diasorin S.P.A. 3 awardees, including Diasorin Inc., Luminex Corp and Diasorin Molecular, LLC Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$4,443,100	2.0%	Rank history: not on the FY2021–FY2023 lists, #67 in FY2024 and #10 in FY2025; up 10 since Aug 2024–Jul 2025.
8	Hologic, Inc. 3 awardees, including Hologic Sales and Service, LLC and Gen-Probe Incorporated Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) Army (Department of the Army)	$4,361,131	1.9%	Rank history: #11 in FY2021, #14 in FY2022, #22 in FY2023, #5 in FY2024 and #7 in FY2025; up 7 since Aug 2024–Jul 2025.
9	Ortho-Clinical Diagnostics Inc. 5 awardees, including Quidelortho Sales Company, LLC Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$4,132,060	1.8%	Rank history: #5 in FY2021, #43 in FY2022, #71 in FY2023, #21 in FY2024 and #8 in FY2025; down 1 since Aug 2024–Jul 2025.
10	Biofire Defense LLC 4 awardees, including Biofire Diagnostics LLC, Biomerieux Japan Ltd. and Biomerieux Deutschland GMBH Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) DOS (Department of State)	$3,905,080	1.7%	Rank history: #85 in FY2021, not on the FY2022–FY2023 lists, #6 in FY2024 and #2 in FY2025; down 7 since Aug 2024–Jul 2025.
11	Werfen USA LLC Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$3,568,334	1.6%	Rank history: #52 in FY2021, #54 in FY2022, #47 in FY2023, #37 in FY2024 and #14 in FY2025; up 5 since Aug 2024–Jul 2025.
12	Vmrd Inc. Top agencies USDA (Department of Agriculture)	$3,330,499	1.5%	Rank history: #96 in FY2021, not on the FY2022 list, #77 in FY2023, #82 in FY2024 and #49 in FY2025; up 44 since Aug 2024–Jul 2025.
13	Siemens Corporation Through Siemens Healthcare Diagnostics Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DHA (Defense Health Agency)	$2,752,588	1.2%	Rank history: not on the FY2021–FY2023 lists, #64 in FY2024 and #9 in FY2025; down 4 since Aug 2024–Jul 2025.
14	Government Scientific Source Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$2,019,999	0.9%	Rank history: #20 in FY2021, #21 in FY2022, #32 in FY2023, #27 in FY2024 and #16 in FY2025; up 13 since Aug 2024–Jul 2025.
15	Sysmex America Inc. Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$1,933,538	0.9%	Rank history: not on the FY2021–FY2024 lists and #13 in FY2025; up 3 since Aug 2024–Jul 2025.
16	Illumina, Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$1,903,597	0.8%	Rank history: #15 in FY2021, #29 in FY2022, #29 in FY2023, #17 in FY2024 and #12 in FY2025; down 2 since Aug 2024–Jul 2025.
17	Sebia, Inc. Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$1,794,913	0.8%	Rank history: #42 in FY2021, #46 in FY2022, #38 in FY2023, #23 in FY2024 and #15 in FY2025; up 3 since Aug 2024–Jul 2025.
18	Fisher Scientific Company L.L.C. Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$1,792,363	0.8%	Rank history: not on the FY2021 list, #37 in FY2022 and not on the FY2023–FY2025 lists; up 41 since Aug 2024–Jul 2025.
19	Qiagen, LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) Army (Department of the Army)	$1,577,272	0.7%	Rank history: #32 in FY2021, #50 in FY2022, #39 in FY2023, #24 in FY2024 and #19 in FY2025; up 2 since Aug 2024–Jul 2025.
20	Diagnostica Stago Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$1,512,816	0.7%	Rank history: not on the FY2021–FY2023 lists, #99 in FY2024 and #18 in FY2025; up 4 since Aug 2024–Jul 2025.
21	Bio-Rad Laboratories, Inc. 3 awardees Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) DARPA (Defense Advanced Research Projects Agency)	$1,505,523	0.7%	Rank history: #31 in FY2021, #41 in FY2022, #40 in FY2023, #19 in FY2024 and #22 in FY2025; up 8 since Aug 2024–Jul 2025.
22	Becton, Dickinson and Co 3 awardees Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$1,477,244	0.7%	Rank history: #9 in FY2021, #6 in FY2022, #28 in FY2023, #22 in FY2024 and not on the FY2025 list; new, not ranked in Aug 2024–Jul 2025.
23	Phadia US Inc. Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$1,268,377	0.6%	Rank history: not on the FY2021–FY2024 lists and #35 in FY2025; up 38 since Aug 2024–Jul 2025.
24	10X Genomics, Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$966,586	0.4%	Rank history: not on the FY2021 list, #33 in FY2022, #36 in FY2023, #25 in FY2024 and #17 in FY2025; up 1 since Aug 2024–Jul 2025.
25	Summit Shoji Inc. Top agencies DLA (Defense Logistics Agency)	$951,710	0.4%	Rank history: not on the FY2021 list, #64 in FY2022, #50 in FY2023, #33 in FY2024 and #29 in FY2025; up 11 since Aug 2024–Jul 2025.
26	Charm Sciences Inc. Top agencies USDA (Department of Agriculture) DLA (Defense Logistics Agency)	$882,705	0.4%	Rank history: #44 in FY2021, #60 in FY2022, #59 in FY2023, #42 in FY2024 and #30 in FY2025; up 15 since Aug 2024–Jul 2025.
27	Ortho-Clinical Diagnostics Singapore Pte. Ltd. Korea Branch Top agencies DHA (Defense Health Agency)	$865,680	0.4%	Rank history: #46 in FY2021, not on the FY2022 list, #52 in FY2023, #49 in FY2024 and #24 in FY2025; up 7 since Aug 2024–Jul 2025.
28	Cytopath Biopsy Lab Inc. Top agencies VA (Department of Veterans Affairs)	$760,000	0.3%	Rank history: not on the FY2021–FY2024 lists and #39 in FY2025; up 23 since Aug 2024–Jul 2025.
29	Cerus Corporation Top agencies DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$590,478	0.3%	Rank history: not on the FY2021 list, #90 in FY2022, #89 in FY2023, #87 in FY2024 and #52 in FY2025; up 45 since Aug 2024–Jul 2025.
30	Agilent Technologies, Inc. 2 awardees Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$587,946	0.3%	Rank history: not on the FY2021–FY2023 lists, #50 in FY2024 and #27 in FY2025; up 16 since Aug 2024–Jul 2025.
31	Polymedco LLC 2 awardees, including Polymedco Cancer Diagnostic Products LLC Top agencies VA (Department of Veterans Affairs)	$554,593	0.2%	Rank history: #87 in FY2021, #67 in FY2022, #65 in FY2023, #56 in FY2024 and #42 in FY2025; up 40 since Aug 2024–Jul 2025.
32	Grifols Diagnostic Solutions Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$530,071	0.2%	Rank history: not on the FY2021–FY2023 lists, #74 in FY2024 and #25 in FY2025; up 5 since Aug 2024–Jul 2025.
33	Branch Medical LLC Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy)	$487,964	0.2%	Rank history: #43 in FY2021, #47 in FY2022, #51 in FY2023, #34 in FY2024 and #23 in FY2025; up 12 since Aug 2024–Jul 2025.
34	Medpharm Inc. Top agencies DHA (Defense Health Agency)	$466,549	0.2%	Rank history: #75 in FY2021, #70 in FY2022, #75 in FY2023, not on the FY2024 list and #32 in FY2025; up 19 since Aug 2024–Jul 2025.
35	Tosoh Bioscience, Inc. Top agencies VA (Department of Veterans Affairs)	$465,557	0.2%	Rank history: not on the FY2021–FY2023 lists, #79 in FY2024 and #53 in FY2025; up 37 since Aug 2024–Jul 2025.
36	SL Meditech Co. Top agencies DHA (Defense Health Agency)	$446,880	0.2%	Rank history: not on the FY2021–FY2023 lists, #66 in FY2024 and #40 in FY2025; up 16 since Aug 2024–Jul 2025.
37	Immucor Inc. Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$438,476	0.2%	Rank history: #18 in FY2021, #20 in FY2022, #27 in FY2023, #12 in FY2024 and #11 in FY2025; down 25 since Aug 2024–Jul 2025.
38	Veterans Healthcare Supply Solutions, Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$418,098	0.2%	Rank history: #12 in FY2021, #18 in FY2022, #62 in FY2023, not on the FY2024 list and #62 in FY2025; up 43 since Aug 2024–Jul 2025.
39	Promega Corporation Top agencies DHA (Defense Health Agency) HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$407,985	0.2%	Rank history: #54 in FY2021, #61 in FY2022, #57 in FY2023, #59 in FY2024 and #41 in FY2025; up 19 since Aug 2024–Jul 2025.
40	The Davinci Company, LLC Top agencies VA (Department of Veterans Affairs)	$396,000	0.2%	Rank history: not on the FY2021 list, #71 in FY2022, #35 in FY2023, #29 in FY2024 and #21 in FY2025; down 17 since Aug 2024–Jul 2025.
41	Advanced Instruments LLC 2 awardees, including Nova Biomedical Corp Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$369,871	0.2%	Rank history: not on the FY2021–FY2024 lists and #59 in FY2025; new, not ranked in Aug 2024–Jul 2025.
42	Cardinal Health 200, LLC Top agencies VA (Department of Veterans Affairs)	$368,925	0.2%	Rank history: not on the FY2021–FY2024 lists and #26 in FY2025; down 7 since Aug 2024–Jul 2025.
43	Henry Schein, Inc. Top agencies DHA (Defense Health Agency)	$348,390	0.2%	Rank history: #57 in FY2021, #68 in FY2022, #68 in FY2023, #53 in FY2024 and #38 in FY2025; up 7 since Aug 2024–Jul 2025.
44	Alba Bioscience, Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$344,246	0.2%	Rank history: #72 in FY2021, #87 in FY2022, #80 in FY2023, #69 in FY2024 and #50 in FY2025; up 22 since Aug 2024–Jul 2025.
45	Chembio Diagnostic Systems Inc. Top agencies USDA (Department of Agriculture)	$310,777	0.1%	Rank history: not on the FY2021–FY2024 lists and #99 in FY2025; up 69 since Aug 2024–Jul 2025.
46	Oxford Nanopore Technologies, Inc. Top agencies HHS (Department of Health and Human Services)	$301,824	0.1%	Rank history: not on the FY2021–FY2024 lists and #90 in FY2025; up 48 since Aug 2024–Jul 2025.
47	Cidichem S.R.L. Top agencies DHA (Defense Health Agency)	$297,959	0.1%	Rank history: not on the FY2021–FY2023 lists, #72 in FY2024 and #36 in FY2025; up 1 since Aug 2024–Jul 2025.
48	Derrah Morrison Enterprises LLC Top agencies VA (Department of Veterans Affairs)	$289,497	0.1%	Rank history: not on the FY2021–FY2024 lists and #65 in FY2025; up 43 since Aug 2024–Jul 2025.
49	Speed Biosystems, LLC Top agencies HHS (Department of Health and Human Services)	$248,930	0.1%	Rank history: #50 in FY2021, #77 in FY2022, #81 in FY2023, not on the FY2024 list and #58 in FY2025; new, not ranked in Aug 2024–Jul 2025.
50	Newcomer Supply, Inc. Top agencies DHA (Defense Health Agency)	$229,357	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
51	Cambridge Isotope Laboratories Inc. Top agencies HHS (Department of Health and Human Services)	$221,095	0.1%	Rank history: not on the FY2021–FY2023 lists, #100 in FY2024 and #61 in FY2025; up 73 since Aug 2024–Jul 2025.
52	Biofire Diagnostics LLC Top agencies VA (Department of Veterans Affairs)	$196,294	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
53	Orasure Technologies Inc. Top agencies HHS (Department of Health and Human Services)	$191,450	0.1%	Rank history: #10 in FY2021, #59 in FY2022, #9 in FY2023, not on the FY2024 list and #60 in FY2025; up 39 since Aug 2024–Jul 2025.
54	Reidy Medical Supply Inc. Top agencies VA (Department of Veterans Affairs)	$182,900	0.1%	Rank history: not on the FY2021–FY2023 lists, #63 in FY2024 and #34 in FY2025; down 16 since Aug 2024–Jul 2025.
55	Ahlstrom USA Inc. Top agencies DHA (Defense Health Agency)	$182,560	0.1%	Rank history: #74 in FY2021, #79 in FY2022, #67 in FY2023, #57 in FY2024 and #47 in FY2025; up 8 since Aug 2024–Jul 2025.
56	SZY Holdings, LLC Top agencies DLA (Defense Logistics Agency)	$177,032	0.1%	Rank history: #93 in FY2021, not on the FY2022–FY2023 lists, #80 in FY2024 and #75 in FY2025; up 42 since Aug 2024–Jul 2025.
57	Medline Industries, LP Top agencies VA (Department of Veterans Affairs)	$172,740	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
58	McKesson Corporation 2 awardees, including Mckesson Medical-Surgical Government Solutions LLC Top agencies HHS (Department of Health and Human Services)	$158,912	0.1%	Rank history: not on the FY2021–FY2023 lists, #85 in FY2024 and #81 in FY2025; up 59 since Aug 2024–Jul 2025.
59	Maxim Biomedical, Inc. Top agencies Navy (Department of the Navy)	$155,000	0.1%	Rank history: not on the FY2021 list, #8 in FY2022, #10 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
60	Meso Scale Diagnostics LLC Top agencies Navy (Department of the Navy) HHS (Department of Health and Human Services)	$153,229	0.1%	Rank history: #16 in FY2021, #35 in FY2022, #46 in FY2023, #52 in FY2024 and #54 in FY2025; down 13 since Aug 2024–Jul 2025.
61	First Nation Group LLC Top agencies VA (Department of Veterans Affairs)	$146,995	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
62	Meditrade Medical Trading GMBH Top agencies DHA (Defense Health Agency)	$142,777	0.1%	Rank history: not on the FY2021–FY2022 lists, #42 in FY2023, not on the FY2024 list and #74 in FY2025; up 6 since Aug 2024–Jul 2025.
63	Laboratory Corporation of America 2 awardees, including Medtox Diagnostics, Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$133,768	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
64	Immuno Mycologies Inc. Top agencies VA (Department of Veterans Affairs)	$133,351	0.1%	Rank history: not on the FY2021–FY2023 lists, #70 in FY2024 and #44 in FY2025; down 2 since Aug 2024–Jul 2025.
65	Diagnostic Consulting Network, LLC Top agencies USDA (Department of Agriculture)	$129,000	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
66	National Environmental Inc. Top agencies HHS (Department of Health and Human Services)	$125,244	0.1%	Rank history: not on the FY2021–FY2025 lists; up 120 since Aug 2024–Jul 2025.
67	Revvity Inc. 3 awardees, including Revvity Health Sciences, Inc. and Euroimmun US Incorporated Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$124,486	0.1%	Rank history: not on the FY2021 list, #85 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
68	Red Heritage Medical LLC Top agencies HHS (Department of Health and Human Services)	$123,500	0.1%	Rank history: not on the FY2021–FY2023 lists, #86 in FY2024 and #46 in FY2025; down 13 since Aug 2024–Jul 2025.
69	Stripes Global, Inc. Top agencies VA (Department of Veterans Affairs)	$123,390	0.1%	Rank history: #84 in FY2021 and not on the FY2022–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
70	Idexx Distribution, Inc. Top agencies USDA (Department of Agriculture)	$120,583	0.1%	Rank history: not on the FY2021–FY2025 lists; up 41 since Aug 2024–Jul 2025.
71	Sysmex Deutschland GMBH Top agencies DHA (Defense Health Agency)	$120,115	0.1%	Rank history: #23 in FY2021, #27 in FY2022, #31 in FY2023, #14 in FY2024 and not on the FY2025 list; up 67 since Aug 2024–Jul 2025.
72	STG Korea Inc. Top agencies DHA (Defense Health Agency)	$116,573	0.1%	Rank history: not on the FY2021–FY2024 lists and #83 in FY2025; up 28 since Aug 2024–Jul 2025.
73	International Hospital Supply Corporation Top agencies DHA (Defense Health Agency)	$112,972	0.1%	Rank history: not on the FY2021–FY2022 lists, #98 in FY2023 and not on the FY2024–FY2025 lists; up 70 since Aug 2024–Jul 2025.
74	Communications Professionals Inc. Top agencies USDA (Department of Agriculture)	$111,196	<0.1%	Rank history: not on the FY2021–FY2024 lists and #84 in FY2025; up 16 since Aug 2024–Jul 2025.
75	Biocartis US Inc Top agencies VA (Department of Veterans Affairs)	$108,922	<0.1%	Rank history: not on the FY2021–FY2025 lists; up 45 since Aug 2024–Jul 2025.
76	Streck LLC Top agencies VA (Department of Veterans Affairs)	$106,888	<0.1%	Rank history: not on the FY2021–FY2024 lists and #93 in FY2025; up 60 since Aug 2024–Jul 2025.
77	Biocare Medical LLC Top agencies DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$99,813	<0.1%	Rank history: not on the FY2021–FY2024 lists and #100 in FY2025; up 41 since Aug 2024–Jul 2025.
78	Asem Solutions LLC Top agencies VA (Department of Veterans Affairs)	$94,080	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
79	Edge Biosystems Inc. Top agencies DHA (Defense Health Agency)	$92,205	<0.1%	Rank history: not on the FY2021–FY2024 lists and #80 in FY2025; up 20 since Aug 2024–Jul 2025.
80	Nichiei-Tokai Co., Ltd. Top agencies DHA (Defense Health Agency)	$91,425	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
81	Mapp Biopharmaceutical, Inc. Top agencies DHA (Defense Health Agency)	$91,250	<0.1%	Rank history: not on the FY2021–FY2024 lists and #77 in FY2025; up 28 since Aug 2024–Jul 2025.
82	Franklin Young International, Incorporated Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) VA (Department of Veterans Affairs)	$88,670	<0.1%	Rank history: #73 in FY2021, #97 in FY2022, #86 in FY2023, #65 in FY2024 and #57 in FY2025; down 4 since Aug 2024–Jul 2025.
83	Neogen Corp Top agencies USDA (Department of Agriculture)	$87,187	<0.1%	Rank history: not on the FY2021–FY2024 lists and #70 in FY2025; up 39 since Aug 2024–Jul 2025.
84	Meridian Bioscience Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$81,803	<0.1%	Rank history: not on the FY2021–FY2025 lists; up 18 since Aug 2024–Jul 2025.
85	Alliant Enterprises, LLC Top agencies VA (Department of Veterans Affairs)	$80,115	<0.1%	Rank history: not on the FY2021–FY2025 lists; up 57 since Aug 2024–Jul 2025.
86	Asuragen Incorporated Top agencies DHA (Defense Health Agency)	$77,360	<0.1%	Rank history: not on the FY2021–FY2024 lists and #78 in FY2025; up 9 since Aug 2024–Jul 2025.
87	Nationwide Pharmaceutical LLC Top agencies VA (Department of Veterans Affairs)	$72,188	<0.1%	Rank history: #55 in FY2021, not on the FY2022 list, #90 in FY2023 and not on the FY2024–FY2025 lists; up 39 since Aug 2024–Jul 2025.
88	Caredx, Inc. Top agencies VA (Department of Veterans Affairs)	$71,019	<0.1%	Rank history: not on the FY2021–FY2023 lists, #96 in FY2024 and #64 in FY2025; down 23 since Aug 2024–Jul 2025.
89	Synyoung Biomedics Top agencies DHA (Defense Health Agency)	$66,316	<0.1%	Rank history: not on the FY2021–FY2025 lists; up 43 since Aug 2024–Jul 2025.
90	Siemens Aktiengesellschaft Through Siemens Healthcare SL. Top agencies DHA (Defense Health Agency)	$65,599	<0.1%	Rank history: #22 in FY2021, #3 in FY2022, #24 in FY2023, #8 in FY2024 and not on the FY2025 list; up 47 since Aug 2024–Jul 2025.
91	Arkray Marketing, Inc. Top agencies DHA (Defense Health Agency)	$64,400	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
92	Inbios International Inc. Top agencies HHS (Department of Health and Human Services)	$62,066	<0.1%	Rank history: not on the FY2021 list, #9 in FY2022, #16 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
93	Defcol Global Trading WLL Top agencies USAF (Department of the Air Force)	$61,799	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
94	Invivoscribe, Inc. Top agencies HHS (Department of Health and Human Services)	$57,435	<0.1%	Rank history: not on the FY2021–FY2025 lists; up 29 since Aug 2024–Jul 2025.
95	Red Heritage Medical Diagnostics Company LLC Top agencies HHS (Department of Health and Human Services)	$56,356	<0.1%	Rank history: not on the FY2021–FY2025 lists; up 50 since Aug 2024–Jul 2025.
96	Namu Med Top agencies DHA (Defense Health Agency)	$54,983	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
97	Bio-Techne Sales Corporation Top agencies Army (Department of the Army) HHS (Department of Health and Human Services)	$54,079	<0.1%	Rank history: not on the FY2021–FY2024 lists and #85 in FY2025; up 15 since Aug 2024–Jul 2025.
98	KKR & Co. Inc. Through Biosearch Technologies, Inc. Top agencies Navy (Department of the Navy)	$50,968	<0.1%	Rank history: not on the FY2021–FY2022 lists, #72 in FY2023, #39 in FY2024 and not on the FY2025 list; down 65 since Aug 2024–Jul 2025.
99	Lonza Walkersville Inc. Top agencies HHS (Department of Health and Human Services)	$48,493	<0.1%	Rank history: not on the FY2021–FY2023 lists, #94 in FY2024 and #97 in FY2025; up 6 since Aug 2024–Jul 2025.
100	Fresenius Medical Care Holdings Inc. Through Fenwal, Inc. Top agencies DHA (Defense Health Agency)	$48,356	<0.1%	Rank history: not on the FY2021–FY2025 lists; up 21 since 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 $225 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.

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