Top 100 Contractors in PSC 6550: In Vitro Diagnostic Substances, Reagents, Test Kits and Sets, FY2021

Name: Top 100 Contractors in PSC 6550: In Vitro Diagnostic Substances, Reagents, Test Kits and Sets, FY2021
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2020 – Sep 30, 2021 Code page on GovTribe

The top 10 won 79% of FY2021 PSC 6550 contract dollars

Contract obligations: $597,888,712 Net of deobligations, by contracts coded PSC 6550
Contractors: 259 Parent companies with an obligation
Largest contractor: Astrazeneca PLC $215 million, 32.8% 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	Astrazeneca PLC Through Astrazeneca Pharmaceuticals LP Top agencies Army (Department of the Army)	$214,966,000	32.8%	Rank history: #1 in FY2022 and not on the FY2023–FY2025 lists; up 2 since FY2020.
2	Abbott Laboratories 10 awardees, including Abbott Rapid DX North America LLC, Abbott Molecular Inc. and Alere San Diego, Inc. Top agencies VA (Department of Veterans Affairs) DLA (Defense Logistics Agency) Army (Department of the Army)	$80,846,112	12.3%	Rank history: #2 in FY2022, #1 in FY2023, #7 in FY2024 and #4 in FY2025; up 4 since FY2020.
3	Danaher Corporation 9 awardees, including Cepheid, Beckman Coulter, Inc. and Integrated DNA Technologies, Inc. Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) HHS (Department of Health and Human Services)	$79,726,186	12.1%	Rank history: #5 in FY2022, #6 in FY2023, #1 in FY2024 and #1 in FY2025; up 1 since FY2020.
4	Ortho-Clinical Diagnostics, Inc. 2 awardees Top agencies USAF (Department of the Air Force) Army (Department of the Army) VA (Department of Veterans Affairs)	$53,838,919	8.2%	Rank history: #55 in FY2022, not on the FY2023 list, #17 in FY2024 and #6 in FY2025; up 14 since FY2020.
5	Roche Holding AG 2 awardees, including Roche Diagnostics Corporation and Roche Diabetes Care Inc. Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force) Army (Department of the Army)	$23,333,453	3.6%	Rank history: #4 in FY2022, #4 in FY2023, #4 in FY2024 and not on the FY2025 list; unchanged since FY2020.
6	Compagnie Merieux Alliance 4 awardees, including Biofire Diagnostics LLC, Biomerieux Inc. and Biofire Defense LLC Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) DHA (Defense Health Agency)	$16,054,056	2.4%	Rank history: #7 in FY2022, #7 in FY2023, #6 in FY2024 and not on the FY2025 list; down 4 since FY2020.
7	Becton, Dickinson and Co 4 awardees Top agencies DLA (Defense Logistics Agency) VA (Department of Veterans Affairs) Army (Department of the Army)	$13,782,811	2.1%	Rank history: #3 in FY2022, #18 in FY2023, #28 in FY2024 and not on the FY2025 list; down 6 since FY2020.
8	Thermo Electron Corporation 11 awardees, including Fisher Scientific Company L.L.C., Life Technologies Corporation and Microgenics Corporation Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) USAF (Department of the Air Force)	$11,917,570	1.8%	Rank history: #9 in FY2022, #10 in FY2023, #27 in FY2024 and not on the FY2025 list; up 1 since FY2020.
9	Luminex Corporation 3 awardees, including Diasorin Inc. and Diasorin Molecular, LLC Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force) Army (Department of the Army)	$11,208,292	1.7%	Rank history: #19 in FY2022, #41 in FY2023, #39 in FY2024 and #36 in FY2025; up 25 since FY2020.
10	Princeton Biomeditech Corp Top agencies USAF (Department of the Air Force)	$9,885,816	1.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
11	Johnson & Johnson Through Ortho-Clinical Diagnostics, Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$5,778,085	0.9%	Rank history: #15 in FY2022, #17 in FY2023, #15 in FY2024 and not on the FY2025 list; up 22 since FY2020.
12	Hologic, Inc. 3 awardees, including Hologic Sales and Service, LLC Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) Navy (Department of the Navy)	$5,397,449	0.8%	Rank history: #11 in FY2022, #12 in FY2023, #9 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
13	Government Scientific Source Inc. Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) DHA (Defense Health Agency)	$5,116,391	0.8%	Rank history: #13 in FY2022, #14 in FY2023, #13 in FY2024 and #13 in FY2025; up 2 since FY2020.
14	Grifols Diagnostic Solutions Inc. 2 awardees, including Gen-Probe Incorporated Top agencies Army (Department of the Army) DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$4,996,991	0.8%	Rank history: #12 in FY2022 and not on the FY2023–FY2025 lists; up 13 since FY2020.
15	Illumina, Inc. Top agencies HHS (Department of Health and Human Services) Navy (Department of the Navy) VA (Department of Veterans Affairs)	$4,089,961	0.6%	Rank history: #16 in FY2022, #15 in FY2023, #11 in FY2024 and #8 in FY2025; down 1 since FY2020.
16	Werfen USA LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$3,950,837	0.6%	Rank history: #18 in FY2022, #24 in FY2023, #18 in FY2024 and #14 in FY2025; up 1 since FY2020.
17	Trillamed LLC Top agencies VA (Department of Veterans Affairs)	$3,858,703	0.6%	Rank history: #88 in FY2022, #100 in FY2023 and not on the FY2024–FY2025 lists; up 86 since FY2020.
18	Murtech, Inc. Top agencies Army (Department of the Army)	$3,633,801	0.6%	Rank history: #22 in FY2022, #26 in FY2023, #55 in FY2024 and #42 in FY2025; down 2 since FY2020.
19	Sysmex Corporation 3 awardees, including Sysmex America, Inc., Sysmex Deutschland GMBH and Sysmex UK Limited Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) Army (Department of the Army)	$3,297,997	0.5%	Rank history: #14 in FY2022, #13 in FY2023, #14 in FY2024 and not on the FY2025 list; up 2 since FY2020.
20	Siemens Aktiengesellschaft 5 awardees, including Siemens Healthcare Diagnostics Inc., Petnet Solutions, Inc. and Siemens Healthcare SL. Top agencies HHS (Department of Health and Human Services) Army (Department of the Army) USAF (Department of the Air Force)	$2,148,427	0.3%	Rank history: #17 in FY2022, #16 in FY2023, #8 in FY2024 and not on the FY2025 list; down 13 since FY2020.
21	Cardinal Health, Inc. 3 awardees, including Cardinal Health 414, LLC and Cardinal Health 200, LLC Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) HHS (Department of Health and Human Services)	$2,136,249	0.3%	Rank history: #40 in FY2022, not on the FY2023 list, #61 in FY2024 and not on the FY2025 list; up 235 since FY2020.
22	Immucor Inc. 2 awardees, including Bioarray Solutions Ltd Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) Army (Department of the Army)	$1,987,578	0.3%	Rank history: #21 in FY2022, #25 in FY2023, #25 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
23	Branch Medical LLC Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) DLA (Defense Logistics Agency)	$1,574,227	0.2%	Rank history: #20 in FY2022, #51 in FY2023, #35 in FY2024 and #28 in FY2025; up 51 since FY2020.
24	Ortho Clinical Diagnostics K.K. Top agencies Navy (Department of the Navy)	$1,531,456	0.2%	Rank history: #28 in FY2022, #37 in FY2023, #42 in FY2024 and #27 in FY2025; up 7 since FY2020.
25	Pathsensors, Inc. Top agencies DOD (Department of Defense)	$1,510,205	0.2%	Rank history: not on the FY2022–FY2025 lists; up 4 since FY2020.
26	Qiagen N.V. 3 awardees, including Qiagen Beverly, LLC Top agencies USAF (Department of the Air Force) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$1,347,488	0.2%	Rank history: #47 in FY2022, #39 in FY2023, #30 in FY2024 and #19 in FY2025; up 27 since FY2020.
27	Biobridge Global Through Qualtex Laboratories Top agencies Army (Department of the Army)	$1,208,336	0.2%	Rank history: #62 in FY2022, #35 in FY2023, #32 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
28	Roche Diagnostics Corporation Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) HHS (Department of Health and Human Services)	$1,185,776	0.2%	Rank history: not on the FY2022–FY2025 lists; down 20 since FY2020.
29	Stago International Through Diagnostica Stago Inc. Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) DHA (Defense Health Agency)	$1,121,642	0.2%	Rank history: #35 in FY2022, #38 in FY2023, #48 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
30	BIO - RAD Laboratories Gesellschaft MIT Beschraenkter Haftung 3 awardees, including Bio Rad Laboratories Inc. Top agencies Army (Department of the Army) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$1,111,879	0.2%	Rank history: #29 in FY2022, #34 in FY2023, #26 in FY2024 and #30 in FY2025; up 46 since FY2020.
31	Biofire Diagnostics LLC Top agencies HHS (Department of Health and Human Services)	$1,047,589	0.2%	Rank history: not on the FY2022–FY2025 lists; down 12 since FY2020.
32	Siemens Healthcare Diagnostics Inc. Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) DHA (Defense Health Agency)	$895,618	0.1%	Rank history: #97 in FY2022 and not on the FY2023–FY2025 lists; up 6 since FY2020.
33	Charm Sciences Inc. Top agencies USDA (Department of Agriculture) DLA (Defense Logistics Agency)	$815,481	0.1%	Rank history: #42 in FY2022, #49 in FY2023, #45 in FY2024 and #41 in FY2025; up 14 since FY2020.
34	The American National Red Cross Top agencies DHA (Defense Health Agency)	$750,000	0.1%	Rank history: #37 in FY2022, #30 in FY2023, #62 in FY2024 and #38 in FY2025; up 34 since FY2020.
35	SZY Holdings, LLC Top agencies DLA (Defense Logistics Agency)	$718,216	0.1%	Rank history: #46 in FY2022, #59 in FY2023, #52 in FY2024 and #46 in FY2025; up 11 since FY2020.
36	Sebia, Inc. Top agencies VA (Department of Veterans Affairs) Army (Department of the Army)	$708,917	0.1%	Rank history: #39 in FY2022, #31 in FY2023, #43 in FY2024 and #23 in FY2025; up 23 since FY2020.
37	10X Genomics, Inc. Top agencies HHS (Department of Health and Human Services) USDA (Department of Agriculture)	$687,846	0.1%	Rank history: #27 in FY2022, #21 in FY2023, #31 in FY2024 and #10 in FY2025; up 99 since FY2020.
38	Cepheid Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$674,311	0.1%	Rank history: #24 in FY2022, #11 in FY2023 and not on the FY2024–FY2025 lists; down 26 since FY2020.
39	Techne Corporation 3 awardees, including Research and Diagnostic Systems, Inc. and Advanced Cell Diagnostics, Inc. Top agencies HHS (Department of Health and Human Services)	$632,450	0.1%	Rank history: #84 in FY2022, #79 in FY2023 and not on the FY2024–FY2025 lists; up 218 since FY2020.
40	Polymedco LLC 2 awardees, including Polymedco Cancer Diagnostic Products LLC Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$616,889	0.1%	Rank history: #52 in FY2022, #36 in FY2023, #34 in FY2024 and #17 in FY2025; up 16 since FY2020.
41	Henry Schein, Inc. Top agencies DHA (Defense Health Agency) DLA (Defense Logistics Agency)	$611,805	0.1%	Rank history: #50 in FY2022, #55 in FY2023, #57 in FY2024 and #44 in FY2025; up 158 since FY2020.
42	Genmark Diagnostics, Inc. Top agencies VA (Department of Veterans Affairs)	$609,873	0.1%	Rank history: #91 in FY2022 and not on the FY2023–FY2025 lists; down 2 since FY2020.
43	The Binding Site. Inc. Top agencies VA (Department of Veterans Affairs)	$596,453	0.1%	Rank history: #44 in FY2022, #40 in FY2023, #37 in FY2024 and #35 in FY2025; up 12 since FY2020.
44	The Blood Center Top agencies VA (Department of Veterans Affairs)	$583,354	0.1%	Rank history: #43 in FY2022, #65 in FY2023, #72 in FY2024 and #57 in FY2025; up 111 since FY2020.
45	Franklin Young International, Incorporated Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy) Army (Department of the Army)	$534,938	0.1%	Rank history: #53 in FY2022, #72 in FY2023, #49 in FY2024 and #29 in FY2025; up 28 since FY2020.
46	Life Technologies GMBH Top agencies Army (Department of the Army)	$491,671	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
47	Solution D Sh.p.k Top agencies Army (Department of the Army)	$476,000	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
48	Fresenius Kabi LLC Through Fenwal, Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$459,504	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
49	Alere San Diego, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$434,149	0.1%	Rank history: not on the FY2022–FY2025 lists; down 25 since FY2020.
50	Quanterix Corporation Top agencies HHS (Department of Health and Human Services)	$424,823	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
51	Lifeshare Blood Center Top agencies VA (Department of Veterans Affairs)	$402,061	0.1%	Rank history: #65 in FY2022, #64 in FY2023, #71 in FY2024 and #67 in FY2025; up 9 since FY2020.
52	3M Company Top agencies DLA (Defense Logistics Agency)	$395,893	0.1%	Rank history: #83 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
53	Zoetis Inc. 2 awardees, including Abaxis, Inc. Top agencies USDA (Department of Agriculture) DLA (Defense Logistics Agency)	$394,961	0.1%	Rank history: #36 in FY2022, #46 in FY2023, #46 in FY2024 and not on the FY2025 list; down 12 since FY2020.
54	Agilent Technologies, Inc. 2 awardees Top agencies VA (Department of Veterans Affairs) Army (Department of the Army)	$390,823	0.1%	Rank history: #49 in FY2022, #47 in FY2023 and not on the FY2024–FY2025 lists; up 25 since FY2020.
55	Keres Consulting Inc. Through Nativevet Materiel, LLC Top agencies HHS (Department of Health and Human Services)	$377,568	0.1%	Rank history: #57 in FY2022 and not on the FY2023–FY2025 lists; down 3 since FY2020.
56	Geo-Med, LLC Top agencies VA (Department of Veterans Affairs)	$347,139	0.1%	Rank history: not on the FY2022 list, #66 in FY2023 and not on the FY2024–FY2025 lists; up 10 since FY2020.
57	Emergency Physicians Medical Group P.C. 3 awardees, including Biosearch Technologies, Inc., Maine Standards Company, LLC and LGC Genomics LLC Top agencies HHS (Department of Health and Human Services) DHA (Defense Health Agency) Navy (Department of the Navy)	$293,811	<0.1%	Rank history: not on the FY2022 list, #56 in FY2023 and not on the FY2024–FY2025 lists; up 91 since FY2020.
58	Vela Diagnostics USA Inc. Top agencies VA (Department of Veterans Affairs)	$292,334	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
59	General Electric Company 2 awardees, including Medi-Physics, Inc. Top agencies VA (Department of Veterans Affairs)	$291,989	<0.1%	Rank history: #96 in FY2022, not on the FY2023 list, #78 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
60	Ahlstrom USA Inc. Top agencies DHA (Defense Health Agency) Army (Department of the Army)	$291,710	<0.1%	Rank history: #54 in FY2022, #91 in FY2023, #90 in FY2024 and not on the FY2025 list; up 21 since FY2020.
61	Novartis AG Through Advanced Accelerator Applications USA Inc. Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$280,642	<0.1%	Rank history: #79 in FY2022, #44 in FY2023, #20 in FY2024 and not on the FY2025 list; unchanged since FY2020.
62	Boston Scientific Corp Through Biocompatibles, Inc. Top agencies VA (Department of Veterans Affairs)	$277,000	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
63	Native Supply Resources LLC Top agencies HHS (Department of Health and Human Services)	$266,820	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 25 since FY2020.
64	Alba Bioscience, Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$266,691	<0.1%	Rank history: #82 in FY2022, #71 in FY2023, #80 in FY2024 and #71 in FY2025; up 26 since FY2020.
65	Ortho-Clinical Diagnostics Singapore PTE. Ltd. Korea Branch 2 awardees, including Ortho-Clinical Diagnostics GMBH Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$265,741	<0.1%	Rank history: not on the FY2022 list, #53 in FY2023, #95 in FY2024 and not on the FY2025 list; up 52 since FY2020.
66	Pacific Biosciences of California, Inc. Top agencies HHS (Department of Health and Human Services)	$257,806	<0.1%	Rank history: #78 in FY2022, #76 in FY2023, #56 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
67	Fuji Photo Film Company Limited (0000) 2 awardees, including Fujifilm Cellular Dynamics, Inc. Top agencies HHS (Department of Health and Human Services)	$249,775	<0.1%	Rank history: #68 in FY2022 and not on the FY2023–FY2025 lists; up 113 since FY2020.
68	Nanostring Technologies, Inc. Top agencies Army (Department of the Army)	$249,498	<0.1%	Rank history: not on the FY2022–FY2023 lists, #74 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
69	American Type Culture Collection Top agencies HHS (Department of Health and Human Services)	$249,363	<0.1%	Rank history: not on the FY2022 list, #73 in FY2023 and not on the FY2024–FY2025 lists; down 18 since FY2020.
70	Biomerieux Inc. Top agencies Army (Department of the Army) DHA (Defense Health Agency)	$243,633	<0.1%	Rank history: not on the FY2022–FY2023 lists, #5 in FY2024 and #2 in FY2025; down 48 since FY2020.
71	Clear Labs Inc. Top agencies VA (Department of Veterans Affairs)	$232,328	<0.1%	Rank history: #38 in FY2022, #70 in FY2023, #59 in FY2024 and #48 in FY2025; new, not ranked in FY2020.
72	Ars Sales & Services LLC Top agencies DLA (Defense Logistics Agency)	$206,802	<0.1%	Rank history: #74 in FY2022, not on the FY2023 list, #97 in FY2024 and not on the FY2025 list; up 55 since FY2020.
73	Agena Bioscience, Inc. Top agencies VA (Department of Veterans Affairs)	$205,747	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
74	More Prepared LLC Top agencies Peace Corps	$204,450	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
75	Tosoh Corporation 2 awardees, including Tosoh Bioscience LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$203,350	<0.1%	Rank history: not on the FY2022 list, #99 in FY2023, #92 in FY2024 and not on the FY2025 list; up 99 since FY2020.
76	Merck KG AUF Aktien 3 awardees, including Cell Marque Corp, Sigma-Aldrich, Inc. and EMD Millipore Corp Top agencies DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$202,020	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 100 since FY2020.
77	Medline Industries, LP Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$194,251	<0.1%	Rank history: #30 in FY2022 and not on the FY2023–FY2025 lists; up 96 since FY2020.
78	Microgenics Corporation Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$190,464	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 1 since FY2020.
79	Sysmex America, Inc. Top agencies Army (Department of the Army) DHA (Defense Health Agency) DLA (Defense Logistics Agency)	$176,774	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 44 since FY2020.
80	Medpharm Inc. Top agencies DHA (Defense Health Agency)	$172,454	<0.1%	Rank history: #85 in FY2022, not on the FY2023–FY2024 lists and #40 in FY2025; up 71 since FY2020.
81	Trinity Biotech PLC Through Biopool U.s., Inc. Top agencies VA (Department of Veterans Affairs)	$168,851	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
82	Hospitality Logistics Concept LLC Top agencies DOS (Department of State)	$164,455	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
83	Caredx, Inc. Top agencies VA (Department of Veterans Affairs)	$147,719	<0.1%	Rank history: not on the FY2022 list, #27 in FY2023, #38 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
84	Biosite Incorporated Through Alere San Diego, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$142,221	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
85	POC Korea Ltd. Top agencies Army (Department of the Army)	$139,210	<0.1%	Rank history: #92 in FY2022, #68 in FY2023, not on the FY2024 list and #94 in FY2025; up 19 since FY2020.
86	Community Blood Center of the Ozarks Top agencies VA (Department of Veterans Affairs)	$138,775	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 22 since FY2020.
87	Melling LLC Top agencies VA (Department of Veterans Affairs)	$137,283	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
88	CPI Pharmacy Services Holding, LLC Top agencies VA (Department of Veterans Affairs)	$136,865	<0.1%	Rank history: #89 in FY2022 and not on the FY2023–FY2025 lists; down 4 since FY2020.
89	Lantheus Holdings, Inc. Through Lantheus Medical Imaging, Inc. Top agencies Army (Department of the Army)	$135,259	<0.1%	Rank history: not on the FY2022 list, #75 in FY2023, #29 in FY2024 and #34 in FY2025; new, not ranked in FY2020.
90	State of Alaska Through State of Alaska Department of Health Top agencies USAF (Department of the Air Force)	$133,980	<0.1%	Rank history: not on the FY2022–FY2023 lists, #88 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
91	Zeus Scientific, LLC Top agencies VA (Department of Veterans Affairs)	$129,031	<0.1%	Rank history: #98 in FY2022, not on the FY2023 list, #68 in FY2024 and #60 in FY2025; new, not ranked in FY2020.
92	Oxford Nanopore Technologies PLC Top agencies USDA (Department of Agriculture) HHS (Department of Health and Human Services)	$118,334	<0.1%	Rank history: #95 in FY2022 and not on the FY2023–FY2025 lists; up 2 since FY2020.
93	Communications Professionals Inc. Top agencies USDA (Department of Agriculture)	$112,089	<0.1%	Rank history: not on the FY2022 list, #96 in FY2023, not on the FY2024 list and #80 in FY2025; up 3 since FY2020.
94	MR Unlimited, LLC Top agencies DLA (Defense Logistics Agency)	$107,730	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 119 since FY2020.
95	Vector Test Systems, Inc. Top agencies DLA (Defense Logistics Agency)	$107,394	<0.1%	Rank history: #99 in FY2022 and not on the FY2023–FY2025 lists; up 38 since FY2020.
96	Biovendor, LLC Top agencies HHS (Department of Health and Human Services)	$104,117	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
97	Terumo BCT Inc. Top agencies DHA (Defense Health Agency)	$101,585	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 35 since FY2020.
98	Iron Mountain Incorporated Through Iron Mountain Information Management LLC Top agencies Navy (Department of the Navy)	$100,947	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
99	Atila Biosystems Incorporated Top agencies HHS (Department of Health and Human Services)	$95,995	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
100	Integrated DNA Technologies, Inc. Through Swift Biosciences, Inc. Top agencies HHS (Department of Health and Human Services)	$95,344	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.

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100 of 259 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 $656 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.
Fiscal year 2021 ran Oct 1, 2020 – Sep 30, 2021. The Department of Defense reports its contract actions to FPDS about 90 days late, so a fiscal year is ranked once they're in, in February, and the list doesn't change after.
Rank changes compare with FY2020. "New" marks a company outside that period's top 500, and "Returned" one of those that was on an earlier fiscal year's list.
Rank lines show each company's rank on every fiscal year's list since FY2021, #1 at the top, on a scale that gives the top of the list more room. A dashed stretch spans years it wasn't on the list. The step from FY2020 takes the color of the rank change beside it.
Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

Quick answers

Who were the top 10 PSC 6550 contractors in FY2021?

1. Astrazeneca PLC ($215M), 2. Abbott Laboratories ($80.8M), 3. Danaher Corporation ($79.7M), 4. Ortho-Clinical Diagnostics, Inc. ($53.8M), 5. Roche Holding AG ($23.3M), 6. Compagnie Merieux Alliance ($16.1M), 7. Becton, Dickinson and Co ($13.8M), 8. Thermo Electron Corporation ($11.9M), 9. Luminex Corporation ($11.2M), 10. Princeton Biomeditech Corp ($9.89M).

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