Top 100 Contractors in PSC 6550: In Vitro Diagnostic Substances, Reagents, Test Kits and Sets, Jul 2025–Jun 2026

Name: Top 100 Contractors in PSC 6550: In Vitro Diagnostic Substances, Reagents, Test Kits and Sets, Jul 2025–Jun 2026
Creator: GovTribe

Parent companies by net contract obligations Jul 1, 2025 – Jun 30, 2026 Code page on GovTribe

The top 10 won 54% of PSC 6550 contract dollars from July 2025 through June 2026

Contract obligations: $199,828,178 Net of deobligations, by contracts coded PSC 6550
Contractors: 209 Parent companies with an obligation
Largest contractor: Danaher Corporation $35 million, 13.9% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Danaher Corporation 8 awardees, including Cepheid, Beckman Coulter Gesellschaft MIT Beschraenkter Haftung and Beckman Coulter, Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$35,034,430	13.9%	Rank history: #3 in FY2021, #5 in FY2022, #6 in FY2023, #1 in FY2024 and #1 in FY2025; up 1 since Jul 2024–Jun 2025.
2	Biomerieux Inc. 5 awardees, including Biofire Defense LLC, Biomerieux Japan Ltd. and Biomerieux Deutschland GMBH Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$28,249,373	11.2%	Rank history: #70 in FY2021, not on the FY2022–FY2023 lists, #5 in FY2024 and #2 in FY2025; up 1 since Jul 2024–Jun 2025.
3	Roche Holdings Inc. 2 awardees, including Roche Diagnostics Corporation and Ventana Medical Systems, Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) USDA (Department of Agriculture)	$21,585,478	8.6%	Rank history: not on the FY2021–FY2023 lists, #22 in FY2024 and #3 in FY2025; up 2 since Jul 2024–Jun 2025.
4	Abbott Laboratories Inc. 4 awardees, including Alere San Diego, Inc. Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) Navy (Department of the Navy)	$13,567,831	5.4%	Rank history: #2 in FY2021, #2 in FY2022, #1 in FY2023, #7 in FY2024 and #4 in FY2025; up 2 since Jul 2024–Jun 2025.
5	Beckman Coulter, Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$10,440,071	4.1%	Rank history: not on the FY2021–FY2023 lists, #3 in FY2024 and #5 in FY2025; down 1 since Jul 2024–Jun 2025.
6	Sysmex America Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) DOJ (Department of Justice)	$7,666,720	3.0%	Rank history: not on the FY2021–FY2023 lists, #12 in FY2024 and #7 in FY2025; up 3 since Jul 2024–Jun 2025.
7	PPD Development LP 5 awardees, including Fisher Scientific Company L.L.C., Microgenics Corporation and Life Technologies Corporation Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy) USDA (Department of Agriculture)	$5,759,648	2.3%	Rank history: not on the FY2021–FY2022 lists, #48 in FY2023, #10 in FY2024 and #12 in FY2025; up 5 since Jul 2024–Jun 2025.
8	Illumina, Inc. Top agencies HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$5,054,384	2.0%	Rank history: #15 in FY2021, #16 in FY2022, #15 in FY2023, #11 in FY2024 and #8 in FY2025; up 2 since Jul 2024–Jun 2025.
9	Quidelortho Sales Company, LLC Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$5,015,233	2.0%	Rank history: not on the FY2021–FY2024 lists and #52 in FY2025; new, not ranked in Jul 2024–Jun 2025.
10	Siemens Corporation Through Siemens Healthcare Diagnostics Inc. Top agencies DHA (Defense Health Agency) Navy (Department of the Navy) VA (Department of Veterans Affairs)	$4,868,560	1.9%	Rank history: not on the FY2021–FY2023 lists, #19 in FY2024 and #9 in FY2025; down 3 since Jul 2024–Jun 2025.
11	10X Genomics, Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$4,728,529	1.9%	Rank history: #37 in FY2021, #27 in FY2022, #21 in FY2023, #31 in FY2024 and #10 in FY2025; up 10 since Jul 2024–Jun 2025.
12	Hologic Sales and Service, LLC Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$4,172,102	1.7%	Rank history: not on the FY2021–FY2024 lists and #11 in FY2025; down 1 since Jul 2024–Jun 2025.
13	Government Scientific Source Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$3,929,598	1.6%	Rank history: #13 in FY2021, #13 in FY2022, #14 in FY2023, #13 in FY2024 and #13 in FY2025; unchanged since Jul 2024–Jun 2025.
14	Werfen USA LLC Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$3,331,839	1.3%	Rank history: #16 in FY2021, #18 in FY2022, #24 in FY2023, #18 in FY2024 and #14 in FY2025; up 2 since Jul 2024–Jun 2025.
15	Ortho-Clinical Diagnostics Inc. 5 awardees Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$3,035,710	1.2%	Rank history: #4 in FY2021, #55 in FY2022, not on the FY2023 list, #17 in FY2024 and #6 in FY2025; down 7 since Jul 2024–Jun 2025.
16	Becton, Dickinson and Co 4 awardees, including Becton, Dickinson Italia S.P.A. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$2,616,048	1.0%	Rank history: #7 in FY2021, #3 in FY2022, #18 in FY2023, #28 in FY2024 and not on the FY2025 list; new, not ranked in Jul 2024–Jun 2025.
17	Greer Laboratories, Inc. Top agencies DHA (Defense Health Agency)	$2,291,752	0.9%	Rank history: not on the FY2021–FY2023 lists, #60 in FY2024 and #16 in FY2025; up 5 since Jul 2024–Jun 2025.
18	Oneblood, Inc. Top agencies VA (Department of Veterans Affairs)	$2,045,388	0.8%	Rank history: not on the FY2021–FY2024 lists and #25 in FY2025; new, not ranked in Jul 2024–Jun 2025.
19	Mariano Prime LLC Top agencies DHA (Defense Health Agency)	$1,952,614	0.8%	Rank history: not on the FY2021–FY2023 lists, #23 in FY2024 and #20 in FY2025; up 4 since Jul 2024–Jun 2025.
20	Fisher Scientific Company L.L.C. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) Navy (Department of the Navy)	$1,857,692	0.7%	Rank history: not on the FY2021 list, #26 in FY2022, not on the FY2023–FY2024 lists and #32 in FY2025; up 20 since Jul 2024–Jun 2025.
21	Polymedco LLC Top agencies VA (Department of Veterans Affairs)	$1,698,711	0.7%	Rank history: #40 in FY2021, #52 in FY2022, #36 in FY2023, #34 in FY2024 and #17 in FY2025; down 3 since Jul 2024–Jun 2025.
22	Qiagen, LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$1,619,267	0.6%	Rank history: #26 in FY2021, #47 in FY2022, #39 in FY2023, #30 in FY2024 and #19 in FY2025; down 2 since Jul 2024–Jun 2025.
23	Diasorin S.P.A. Through Diasorin Inc. Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$1,494,617	0.6%	Rank history: not on the FY2021–FY2024 lists and #22 in FY2025; up 1 since Jul 2024–Jun 2025.
24	BIO - RAD Laboratories Gesellschaft MIT Beschraenkter Haftung 3 awardees, including Bio Rad Laboratories Inc. Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$1,487,414	0.6%	Rank history: #30 in FY2021, #29 in FY2022, #34 in FY2023, #26 in FY2024 and #30 in FY2025; up 12 since Jul 2024–Jun 2025.
25	Abbott Molecular Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$1,319,161	0.5%	Rank history: not on the FY2021–FY2024 lists and #15 in FY2025; down 11 since Jul 2024–Jun 2025.
26	Ortho Clinical Diagnostics K.K. Top agencies DHA (Defense Health Agency)	$1,200,542	0.5%	Rank history: #24 in FY2021, #28 in FY2022, #37 in FY2023, #42 in FY2024 and #27 in FY2025; up 5 since Jul 2024–Jun 2025.
27	Sebia, Inc. Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$1,051,245	0.4%	Rank history: #36 in FY2021, #39 in FY2022, #31 in FY2023, #43 in FY2024 and #23 in FY2025; unchanged since Jul 2024–Jun 2025.
28	Smiths Detection Inc. Top agencies DOD (Department of Defense)	$1,008,866	0.4%	Rank history: not on the FY2021–FY2023 lists, #36 in FY2024 and #26 in FY2025; unchanged since Jul 2024–Jun 2025.
29	Advanced Accelerator Applications USA Inc Through Novartis Pharmaceuticals Corporation Top agencies DHA (Defense Health Agency)	$981,345	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
30	Oxford Nanopore Technologies, Inc. Top agencies HHS (Department of Health and Human Services)	$923,414	0.4%	Rank history: not on the FY2021–FY2024 lists and #61 in FY2025; up 37 since Jul 2024–Jun 2025.
31	Hologic, Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$914,561	0.4%	Rank history: #12 in FY2021, #11 in FY2022, #12 in FY2023, #9 in FY2024 and not on the FY2025 list; up 4 since Jul 2024–Jun 2025.
32	The Binding Site. Inc. Top agencies VA (Department of Veterans Affairs)	$902,854	0.4%	Rank history: #43 in FY2021, #44 in FY2022, #40 in FY2023, #37 in FY2024 and #35 in FY2025; up 1 since Jul 2024–Jun 2025.
33	Luminex Corp Top agencies DHA (Defense Health Agency) USDA (Department of Agriculture) VA (Department of Veterans Affairs)	$863,440	0.3%	Rank history: #9 in FY2021, #19 in FY2022, #41 in FY2023, #39 in FY2024 and #36 in FY2025; up 9 since Jul 2024–Jun 2025.
34	Phadia US Inc. Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$851,699	0.3%	Rank history: not on the FY2021–FY2024 lists and #47 in FY2025; up 71 since Jul 2024–Jun 2025.
35	Charm Sciences Inc. Top agencies USDA (Department of Agriculture)	$821,653	0.3%	Rank history: #33 in FY2021, #42 in FY2022, #49 in FY2023, #45 in FY2024 and #41 in FY2025; up 2 since Jul 2024–Jun 2025.
36	Grifols Diagnostic Solutions Inc. Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$792,901	0.3%	Rank history: not on the FY2021–FY2023 lists, #69 in FY2024 and #31 in FY2025; up 13 since Jul 2024–Jun 2025.
37	Lantheus Holdings, Inc. Through Progenics Pharmaceuticals Inc. Top agencies VA (Department of Veterans Affairs)	$721,744	0.3%	Rank history: #89 in FY2021, not on the FY2022 list, #75 in FY2023, #29 in FY2024 and #34 in FY2025; up 2 since Jul 2024–Jun 2025.
38	Agilent Technologies, Inc. 2 awardees Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$665,456	0.3%	Rank history: not on the FY2021–FY2023 lists, #51 in FY2024 and #37 in FY2025; up 7 since Jul 2024–Jun 2025.
39	Summit Shoji Inc. Top agencies DLA (Defense Logistics Agency)	$646,053	0.3%	Rank history: not on the FY2021 list, #61 in FY2022, #45 in FY2023, #40 in FY2024 and #43 in FY2025; down 1 since Jul 2024–Jun 2025.
40	The American National Red Cross Top agencies DHA (Defense Health Agency)	$595,000	0.2%	Rank history: #34 in FY2021, #37 in FY2022, #30 in FY2023, #62 in FY2024 and #38 in FY2025; up 1 since Jul 2024–Jun 2025.
41	Murtech, Inc. Top agencies Army (Department of the Army)	$584,819	0.2%	Rank history: #18 in FY2021, #22 in FY2022, #26 in FY2023, #55 in FY2024 and #42 in FY2025; up 5 since Jul 2024–Jun 2025.
42	Polymedco Cancer Diagnostic Products LLC Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$580,041	0.2%	Rank history: not on the FY2021–FY2024 lists and #33 in FY2025; up 10 since Jul 2024–Jun 2025.
43	Diagnostica Stago Inc. Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$553,692	0.2%	Rank history: not on the FY2021–FY2024 lists and #24 in FY2025; down 17 since Jul 2024–Jun 2025.
44	Somalogic Operating Co., Inc. Top agencies HHS (Department of Health and Human Services)	$538,136	0.2%	Rank history: not on the FY2021–FY2022 lists, #43 in FY2023, #47 in FY2024 and #18 in FY2025; down 27 since Jul 2024–Jun 2025.
45	Tosoh Bioscience, Inc. Top agencies VA (Department of Veterans Affairs)	$535,558	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
46	McKesson Corporation 2 awardees, including Mckesson Medical-Surgical Inc. and Mckesson Medical-Surgical Government Solutions LLC Top agencies HHS (Department of Health and Human Services) DLA (Defense Logistics Agency)	$518,346	0.2%	Rank history: not on the FY2021–FY2024 lists and #50 in FY2025; up 58 since Jul 2024–Jun 2025.
47	Medpharm Inc. Top agencies DHA (Defense Health Agency)	$466,549	0.2%	Rank history: #80 in FY2021, #85 in FY2022, not on the FY2023–FY2024 lists and #40 in FY2025; up 6 since Jul 2024–Jun 2025.
48	Veterans Healthcare Supply Solutions, Inc. Top agencies VA (Department of Veterans Affairs)	$395,823	0.2%	Rank history: not on the FY2021 list, #45 in FY2022, not on the FY2023–FY2024 lists and #66 in FY2025; up 49 since Jul 2024–Jun 2025.
49	The Blood Center Top agencies VA (Department of Veterans Affairs)	$391,010	0.2%	Rank history: #44 in FY2021, #43 in FY2022, #65 in FY2023, #72 in FY2024 and #57 in FY2025; down 5 since Jul 2024–Jun 2025.
50	Cardinal Health 200, LLC Top agencies VA (Department of Veterans Affairs)	$390,845	0.2%	Rank history: not on the FY2021–FY2024 lists and #45 in FY2025; down 3 since Jul 2024–Jun 2025.
51	Clear Labs Inc. Top agencies VA (Department of Veterans Affairs)	$373,401	0.1%	Rank history: #71 in FY2021, #38 in FY2022, #70 in FY2023, #59 in FY2024 and #48 in FY2025; up 3 since Jul 2024–Jun 2025.
52	Branch Medical LLC Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy)	$353,102	0.1%	Rank history: #23 in FY2021, #20 in FY2022, #51 in FY2023, #35 in FY2024 and #28 in FY2025; down 9 since Jul 2024–Jun 2025.
53	Henry Schein, Inc. Top agencies DHA (Defense Health Agency)	$348,390	0.1%	Rank history: #41 in FY2021, #50 in FY2022, #55 in FY2023, #57 in FY2024 and #44 in FY2025; down 2 since Jul 2024–Jun 2025.
54	Instrumentation Laboratory Japan Co., Ltd. Top agencies DHA (Defense Health Agency)	$347,507	0.1%	Rank history: not on the FY2021–FY2024 lists and #65 in FY2025; up 22 since Jul 2024–Jun 2025.
55	SZY Holdings, LLC Top agencies DLA (Defense Logistics Agency)	$344,058	0.1%	Rank history: #35 in FY2021, #46 in FY2022, #59 in FY2023, #52 in FY2024 and #46 in FY2025; down 5 since Jul 2024–Jun 2025.
56	Life Technologies Corporation Top agencies Navy (Department of the Navy) EPA (Environmental Protection Agency) HHS (Department of Health and Human Services)	$317,807	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
57	Immucor Inc. Top agencies DHA (Defense Health Agency)	$301,462	0.1%	Rank history: not on the FY2021–FY2024 lists and #21 in FY2025; down 32 since Jul 2024–Jun 2025.
58	Caredx Lab Solutions Inc. Top agencies HHS (Department of Health and Human Services)	$292,973	0.1%	Rank history: not on the FY2021–FY2024 lists and #58 in FY2025; up 8 since Jul 2024–Jun 2025.
59	NNA Inc. Through Fenwal, Inc. Top agencies DHA (Defense Health Agency)	$286,074	0.1%	Rank history: not on the FY2021–FY2025 lists; up 59 since Jul 2024–Jun 2025.
60	Vmrd Inc. Top agencies USDA (Department of Agriculture)	$270,499	0.1%	Rank history: not on the FY2021–FY2023 lists, #77 in FY2024 and #56 in FY2025; down 5 since Jul 2024–Jun 2025.
61	RLS (USA) Inc. Top agencies VA (Department of Veterans Affairs)	$250,075	0.1%	Rank history: not on the FY2021–FY2024 lists and #49 in FY2025; down 4 since Jul 2024–Jun 2025.
62	Jackson Laboratory Top agencies HHS (Department of Health and Human Services)	$248,906	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
63	Cerus Corporation Top agencies DHA (Defense Health Agency)	$246,510	0.1%	Rank history: not on the FY2021 list, #81 in FY2022, #81 in FY2023, #94 in FY2024 and #63 in FY2025; up 7 since Jul 2024–Jun 2025.
64	Diasorin Molecular, LLC Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$234,531	0.1%	Rank history: not on the FY2021 list, #73 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
65	Franklin Young International, Incorporated Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy) HHS (Department of Health and Human Services)	$234,033	0.1%	Rank history: #45 in FY2021, #53 in FY2022, #72 in FY2023, #49 in FY2024 and #29 in FY2025; down 35 since Jul 2024–Jun 2025.
66	Otsuka Holdings Co. Ltd. Through Cambridge Isotope Laboratories, Inc. Top agencies HHS (Department of Health and Human Services)	$221,095	0.1%	Rank history: not on the FY2021–FY2024 lists and #64 in FY2025; up 133 since Jul 2024–Jun 2025.
67	Alba Bioscience, Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$210,558	0.1%	Rank history: #64 in FY2021, #82 in FY2022, #71 in FY2023, #80 in FY2024 and #71 in FY2025; up 10 since Jul 2024–Jun 2025.
68	Ortho-Clinical Diagnostics Singapore Pte. Ltd. Korea Branch Top agencies DHA (Defense Health Agency)	$200,895	0.1%	Rank history: not on the FY2021–FY2024 lists and #88 in FY2025; up 17 since Jul 2024–Jun 2025.
69	The Trustees of Columbia University In the City of New York Top agencies Navy (Department of the Navy)	$190,084	0.1%	Rank history: not on the FY2021–FY2024 lists and #70 in FY2025; new, not ranked in Jul 2024–Jun 2025.
70	Orasure Technologies Inc. Top agencies HHS (Department of Health and Human Services)	$188,660	0.1%	Rank history: not on the FY2021 list, #10 in FY2022, #8 in FY2023, #84 in FY2024 and #62 in FY2025; up 11 since Jul 2024–Jun 2025.
71	Communications Professionals Inc. Top agencies USDA (Department of Agriculture)	$187,338	0.1%	Rank history: #93 in FY2021, not on the FY2022 list, #96 in FY2023, not on the FY2024 list and #80 in FY2025; up 32 since Jul 2024–Jun 2025.
72	Promega Corporation Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$184,738	0.1%	Rank history: not on the FY2021 list, #71 in FY2022, #60 in FY2023, #79 in FY2024 and #77 in FY2025; up 16 since Jul 2024–Jun 2025.
73	Nova Biomedical Corp Top agencies DHA (Defense Health Agency)	$176,071	0.1%	Rank history: not on the FY2021–FY2024 lists and #53 in FY2025; down 11 since Jul 2024–Jun 2025.
74	Medline Industries, LP Top agencies VA (Department of Veterans Affairs)	$172,740	0.1%	Rank history: #77 in FY2021, #30 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
75	Biocartis US Inc Top agencies VA (Department of Veterans Affairs)	$159,501	0.1%	Rank history: not on the FY2021–FY2025 lists; up 79 since Jul 2024–Jun 2025.
76	Chembio Diagnostic Systems Inc. Top agencies USDA (Department of Agriculture)	$155,227	0.1%	Rank history: not on the FY2021–FY2025 lists; up 93 since Jul 2024–Jun 2025.
77	Maxim Biomedical, Inc. Top agencies Navy (Department of the Navy)	$155,000	0.1%	Rank history: not on the FY2021–FY2022 lists, #22 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
78	Jubilant Draximage Radiopharmacies, Inc. Top agencies VA (Department of Veterans Affairs)	$151,845	0.1%	Rank history: not on the FY2021–FY2022 lists, #94 in FY2023, not on the FY2024 list and #51 in FY2025; down 14 since Jul 2024–Jun 2025.
79	University of California, San Diego Top agencies Navy (Department of the Navy)	$148,968	0.1%	Rank history: not on the FY2021–FY2024 lists and #84 in FY2025; up 11 since Jul 2024–Jun 2025.
80	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 Jul 2024–Jun 2025.
81	Ultima Genomics, Inc. Top agencies HHS (Department of Health and Human Services)	$146,500	0.1%	Rank history: not on the FY2021–FY2024 lists and #78 in FY2025; new, not ranked in Jul 2024–Jun 2025.
82	Meditrade Medical Trading GMBH Top agencies DHA (Defense Health Agency)	$142,777	0.1%	Rank history: not on the FY2021–FY2022 lists, #33 in FY2023, not on the FY2024 list and #72 in FY2025; down 19 since Jul 2024–Jun 2025.
83	SL Meditech Co. Top agencies DHA (Defense Health Agency)	$135,240	0.1%	Rank history: not on the FY2021–FY2023 lists, #96 in FY2024 and #85 in FY2025; up 8 since Jul 2024–Jun 2025.
84	Indical Inc. Top agencies USDA (Department of Agriculture)	$134,152	0.1%	Rank history: not on the FY2021–FY2025 lists; up 32 since Jul 2024–Jun 2025.
85	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 Jul 2024–Jun 2025.
86	Abcam Inc. Top agencies HHS (Department of Health and Human Services)	$124,750	<0.1%	Rank history: not on the FY2021–FY2024 lists and #75 in FY2025; up 79 since Jul 2024–Jun 2025.
87	Advanced Instruments LLC Top agencies VA (Department of Veterans Affairs)	$121,440	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
88	Sysmex Corporation Through Sysmex Deutschland GMBH Top agencies DHA (Defense Health Agency)	$120,115	<0.1%	Rank history: #19 in FY2021, #14 in FY2022, #13 in FY2023, #14 in FY2024 and not on the FY2025 list; up 39 since Jul 2024–Jun 2025.
89	Immuno Mycologies Inc. Top agencies VA (Department of Veterans Affairs)	$118,170	<0.1%	Rank history: not on the FY2021–FY2023 lists, #65 in FY2024 and not on the FY2025 list; up 25 since Jul 2024–Jun 2025.
90	STG Korea Inc. Top agencies DHA (Defense Health Agency)	$116,573	<0.1%	Rank history: not on the FY2021–FY2024 lists and #79 in FY2025; down 1 since Jul 2024–Jun 2025.
91	Streck LLC Top agencies VA (Department of Veterans Affairs)	$106,888	<0.1%	Rank history: not on the FY2021–FY2024 lists and #92 in FY2025; up 44 since Jul 2024–Jun 2025.
92	Bio-Techne Sales Corporation Top agencies Army (Department of the Army) HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$104,952	<0.1%	Rank history: not on the FY2021–FY2024 lists and #82 in FY2025; up 44 since Jul 2024–Jun 2025.
93	Cenmed Enterprises Inc. Top agencies DLA (Defense Logistics Agency)	$103,721	<0.1%	Rank history: not on the FY2021 list, #76 in FY2022, not on the FY2023 list, #98 in FY2024 and not on the FY2025 list; up 27 since Jul 2024–Jun 2025.
94	Metro Medical Equipment & Supply, Inc. Top agencies DHA (Defense Health Agency)	$102,402	<0.1%	Rank history: not on the FY2021–FY2024 lists and #98 in FY2025; up 14 since Jul 2024–Jun 2025.
95	Nikon Americas Inc. Through Nikon Instruments Inc. Top agencies VA (Department of Veterans Affairs)	$100,580	<0.1%	Rank history: not on the FY2021–FY2024 lists and #96 in FY2025; new, not ranked in Jul 2024–Jun 2025.
96	Monument Health Rapid City Hospital, Inc. Top agencies VA (Department of Veterans Affairs)	$96,268	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
97	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 Jul 2024–Jun 2025.
98	Meridian Bioscience Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$87,563	<0.1%	Rank history: not on the FY2021–FY2025 lists; up 17 since Jul 2024–Jun 2025.
99	Stripes Global, Inc. Top agencies VA (Department of Veterans Affairs)	$84,079	<0.1%	Rank history: not on the FY2021 list, #90 in FY2022, #89 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
100	Hemosonics, LLC Top agencies VA (Department of Veterans Affairs)	$82,300	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.

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100 of 209 contractors listed here. See the rest on GovTribe.

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 $252 million obligated before deobligations, so they never pass 100%.
Parent companies: each action counts under the ultimate parent its award record names, or under the awardee when it names none, so no dollar counts twice. Parents of the same name (Inc., LLC and the like aside) count as one company, since FPDS records a company's parent under more than one UEI over time. GovTribe corrects a few parents and names by hand; see the corrections.
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 Jul 2024–Jun 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

Who were the top 10 PSC 6550 contractors in Jul 2025–Jun 2026?

1. Danaher Corporation ($35M), 2. Biomerieux Inc. ($28.2M), 3. Roche Holdings Inc. ($21.6M), 4. Abbott Laboratories Inc. ($13.6M), 5. Beckman Coulter, Inc. ($10.4M), 6. Sysmex America Inc. ($7.67M), 7. PPD Development LP ($5.76M), 8. Illumina, Inc. ($5.05M), 9. Quidelortho Sales Company, LLC ($5.02M), 10. Siemens Corporation ($4.87M).

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