Top 100 Contractors in PSC 6550: In Vitro Diagnostic Substances, Reagents, Test Kits and Sets, FY2024

Name: Top 100 Contractors in PSC 6550: In Vitro Diagnostic Substances, Reagents, Test Kits and Sets, FY2024
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2023 – Sep 30, 2024 Code page on GovTribe

The top 10 won 43% of FY2024 PSC 6550 contract dollars

Contract obligations: $214,153,321 Net of deobligations, by contracts coded PSC 6550
Contractors: 276 Parent companies with an obligation
Largest contractor: Danaher Corporation $29.1 million, 9.4% 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 10 awardees, including Cepheid, Beckman Coulter, Inc. and Leica Microsystems Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) Army (Department of the Army)	$29,129,906	9.4%	Rank history: #3 in FY2021, #5 in FY2022, #6 in FY2023 and #1 in FY2025; up 5 since FY2023.
2	Atlantic Trading LLC Top agencies HHS (Department of Health and Human Services)	$26,640,809	8.6%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
3	Beckman Coulter, Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$14,226,504	4.6%	Rank history: not on the FY2021–FY2023 lists and #5 in FY2025; new.
4	Roche Holding AG 3 awardees, including Roche Diagnostics Corporation Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) Army (Department of the Army)	$13,022,122	4.2%	Rank history: #5 in FY2021, #4 in FY2022, #4 in FY2023 and not on the FY2025 list; unchanged since FY2023.
5	Biomerieux Inc. 4 awardees, including Biofire Defense LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) Navy (Department of the Navy)	$11,664,551	3.8%	Rank history: #70 in FY2021, not on the FY2022–FY2023 lists and #2 in FY2025; returned.
6	Compagnie Merieux Alliance 2 awardees, including Biomerieux Inc. and Biofire Diagnostics LLC Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) Army (Department of the Army)	$10,913,697	3.5%	Rank history: #6 in FY2021, #7 in FY2022, #7 in FY2023 and not on the FY2025 list; up 1 since FY2023.
7	Abbott Laboratories Inc. 6 awardees, including Alere San Diego, Inc. and Abbott Diabetes Care Sales Corp Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$7,511,884	2.4%	Rank history: #2 in FY2021, not on the FY2022–FY2023 lists and #4 in FY2025; returned.
8	Siemens Aktiengesellschaft 3 awardees, including Siemens Healthcare Diagnostics Inc., Siemens Healthcare SL. and Siemens Healthcare S.R.L. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$6,584,374	2.1%	Rank history: #20 in FY2021, #17 in FY2022, #16 in FY2023 and not on the FY2025 list; up 8 since FY2023.
9	Hologic, Inc. 2 awardees, including Hologic Sales and Service, LLC Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$6,337,541	2.1%	Rank history: #12 in FY2021, #11 in FY2022, #12 in FY2023 and not on the FY2025 list; up 3 since FY2023.
10	PPD Development LP 8 awardees, including Fisher Scientific Company L.L.C., Life Technologies Corporation and One Lambda, Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$5,624,499	1.8%	Rank history: not on the FY2021–FY2022 lists, #48 in FY2023 and #12 in FY2025; up 38 since FY2023.
11	Illumina, Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs) Navy (Department of the Navy)	$5,298,174	1.7%	Rank history: #15 in FY2021, #16 in FY2022, #15 in FY2023 and #8 in FY2025; up 4 since FY2023.
12	Sysmex America Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) USAF (Department of the Air Force)	$4,984,810	1.6%	Rank history: not on the FY2021–FY2023 lists and #7 in FY2025; new.
13	Government Scientific Source Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$4,393,670	1.4%	Rank history: #13 in FY2021, #13 in FY2022, #14 in FY2023 and #13 in FY2025; up 1 since FY2023.
14	Sysmex Corporation 3 awardees, including Sysmex America, Inc., Sysmex Deutschland GMBH and Sysmex UK Limited Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$4,312,480	1.4%	Rank history: #19 in FY2021, #14 in FY2022, #13 in FY2023 and not on the FY2025 list; down 1 since FY2023.
15	Johnson & Johnson Through Ortho-Clinical Diagnostics, Inc. Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$3,862,623	1.3%	Rank history: #11 in FY2021, #15 in FY2022, #17 in FY2023 and not on the FY2025 list; up 2 since FY2023.
16	Bioteke Usa, LLC Top agencies HHS (Department of Health and Human Services)	$3,663,360	1.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
17	Ortho-Clinical Diagnostics Inc. 6 awardees Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$3,453,736	1.1%	Rank history: #4 in FY2021, #55 in FY2022, not on the FY2023 list and #6 in FY2025; up 90 since FY2023.
18	Werfen USA LLC 4 awardees, including Werfen GMBH and Immucor Italia S.P.A. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$2,895,181	0.9%	Rank history: #16 in FY2021, #18 in FY2022, #24 in FY2023 and #14 in FY2025; up 6 since FY2023.
19	Siemens Corporation Through Siemens Healthcare Diagnostics Inc. Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy) DHA (Defense Health Agency)	$2,843,653	0.9%	Rank history: not on the FY2021–FY2023 lists and #9 in FY2025; new.
20	Novartis AG Through Advanced Accelerator Applications USA Inc. Top agencies VA (Department of Veterans Affairs)	$2,418,863	0.8%	Rank history: #61 in FY2021, #79 in FY2022, #44 in FY2023 and not on the FY2025 list; up 24 since FY2023.
21	Watmind Usa, Inc. Top agencies HHS (Department of Health and Human Services)	$2,400,000	0.8%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
22	Roche Holdings Inc. Through Roche Diagnostics Corporation Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$2,346,882	0.8%	Rank history: not on the FY2021–FY2023 lists and #3 in FY2025; new.
23	Mariano Prime LLC Top agencies DHA (Defense Health Agency)	$1,973,961	0.6%	Rank history: not on the FY2021–FY2023 lists and #20 in FY2025; new.
24	Biofire Diagnostics LLC Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$1,828,024	0.6%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
25	Immucor Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) USAF (Department of the Air Force)	$1,827,343	0.6%	Rank history: #22 in FY2021, #21 in FY2022, #25 in FY2023 and not on the FY2025 list; unchanged since FY2023.
26	BIO - RAD Laboratories Gesellschaft MIT Beschraenkter Haftung 4 awardees, including Bio Rad Laboratories Inc. Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) Army (Department of the Army)	$1,783,077	0.6%	Rank history: #30 in FY2021, #29 in FY2022, #34 in FY2023 and #30 in FY2025; up 8 since FY2023.
27	Thermo Electron Corporation 4 awardees, including Fisher Scientific Company L.L.C., Microgenics Corporation and Phadia US Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) USAF (Department of the Air Force)	$1,636,426	0.5%	Rank history: #8 in FY2021, #9 in FY2022, #10 in FY2023 and not on the FY2025 list; down 17 since FY2023.
28	Becton, Dickinson and Co 3 awardees Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$1,595,456	0.5%	Rank history: #7 in FY2021, #3 in FY2022, #18 in FY2023 and not on the FY2025 list; down 10 since FY2023.
29	Lantheus Holdings, Inc. Through Progenics Pharmaceuticals Inc. Top agencies VA (Department of Veterans Affairs)	$1,442,380	0.5%	Rank history: #89 in FY2021, not on the FY2022 list, #75 in FY2023 and #34 in FY2025; up 46 since FY2023.
30	Qiagen, LLC 2 awardees Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$1,350,327	0.4%	Rank history: #26 in FY2021, #47 in FY2022, #39 in FY2023 and #19 in FY2025; up 9 since FY2023.
31	10X Genomics, Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$1,339,039	0.4%	Rank history: #37 in FY2021, #27 in FY2022, #21 in FY2023 and #10 in FY2025; down 10 since FY2023.
32	Biobridge Global Through Qualtex Laboratories Top agencies DHA (Defense Health Agency)	$1,307,591	0.4%	Rank history: #27 in FY2021, #62 in FY2022, #35 in FY2023 and not on the FY2025 list; up 3 since FY2023.
33	Grifols SA 2 awardees, including Gen-Probe Incorporated and Grifols Diagnostic Solutions Inc. Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$1,228,020	0.4%	Rank history: not on the FY2021 list, #41 in FY2022, #20 in FY2023 and #93 in FY2025; down 13 since FY2023.
34	Polymedco LLC 2 awardees, including Polymedco Cancer Diagnostic Products LLC Top agencies VA (Department of Veterans Affairs)	$1,216,137	0.4%	Rank history: #40 in FY2021, #52 in FY2022, #36 in FY2023 and #17 in FY2025; up 2 since FY2023.
35	Branch Medical LLC Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$1,132,304	0.4%	Rank history: #23 in FY2021, #20 in FY2022, #51 in FY2023 and #28 in FY2025; up 16 since FY2023.
36	Smiths Detection Inc. Top agencies DOD (Department of Defense)	$1,106,503	0.4%	Rank history: not on the FY2021–FY2023 lists and #26 in FY2025; new.
37	The Binding Site. Inc. Top agencies VA (Department of Veterans Affairs)	$1,105,280	0.4%	Rank history: #43 in FY2021, #44 in FY2022, #40 in FY2023 and #35 in FY2025; up 3 since FY2023.
38	Caredx, Inc. Top agencies VA (Department of Veterans Affairs)	$1,099,370	0.4%	Rank history: #83 in FY2021, not on the FY2022 list, #27 in FY2023 and not on the FY2025 list; down 11 since FY2023.
39	Luminex Corp 6 awardees, including Diasorin Inc. and Diasorin Molecular, LLC Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) Navy (Department of the Navy)	$1,069,820	0.3%	Rank history: #9 in FY2021, #19 in FY2022, #41 in FY2023 and #36 in FY2025; up 2 since FY2023.
40	Summit Shoji Inc. Top agencies DLA (Defense Logistics Agency)	$1,032,698	0.3%	Rank history: not on the FY2021 list, #61 in FY2022, #45 in FY2023 and #43 in FY2025; up 5 since FY2023.
41	Diasorin Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) USAF (Department of the Air Force)	$1,008,703	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
42	Ortho Clinical Diagnostics K.K. Top agencies DHA (Defense Health Agency)	$991,251	0.3%	Rank history: #24 in FY2021, #28 in FY2022, #37 in FY2023 and #27 in FY2025; down 5 since FY2023.
43	Sebia, Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) USAF (Department of the Air Force)	$864,968	0.3%	Rank history: #36 in FY2021, #39 in FY2022, #31 in FY2023 and #23 in FY2025; down 12 since FY2023.
44	KKR & Co. Inc. Through Biosearch Technologies, Inc. Top agencies HHS (Department of Health and Human Services) Navy (Department of the Navy)	$826,418	0.3%	Rank history: not on the FY2021–FY2022 lists, #57 in FY2023 and not on the FY2025 list; up 13 since FY2023.
45	Charm Sciences Inc. Top agencies USDA (Department of Agriculture) DLA (Defense Logistics Agency)	$782,168	0.3%	Rank history: #33 in FY2021, #42 in FY2022, #49 in FY2023 and #41 in FY2025; up 4 since FY2023.
46	Zoetis Inc. Top agencies USDA (Department of Agriculture)	$768,140	0.2%	Rank history: #53 in FY2021, #36 in FY2022, #46 in FY2023 and not on the FY2025 list; unchanged since FY2023.
47	Somalogic Operating Co., Inc. Top agencies HHS (Department of Health and Human Services)	$765,648	0.2%	Rank history: not on the FY2021–FY2022 lists, #43 in FY2023 and #18 in FY2025; down 4 since FY2023.
48	Stago International Through Diagnostica Stago Inc. Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$645,161	0.2%	Rank history: #29 in FY2021, #35 in FY2022, #38 in FY2023 and not on the FY2025 list; down 10 since FY2023.
49	Franklin Young International, Incorporated Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy) HHS (Department of Health and Human Services)	$630,367	0.2%	Rank history: #45 in FY2021, #53 in FY2022, #72 in FY2023 and #29 in FY2025; up 23 since FY2023.
50	Vitalis Consulting LLC Top agencies VA (Department of Veterans Affairs)	$580,782	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
51	Agilent Technologies, Inc. 2 awardees Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$579,283	0.2%	Rank history: not on the FY2021–FY2023 lists and #37 in FY2025; new.
52	SZY Holdings, LLC Top agencies DLA (Defense Logistics Agency)	$549,084	0.2%	Rank history: #35 in FY2021, #46 in FY2022, #59 in FY2023 and #46 in FY2025; up 7 since FY2023.
53	Longhorn Vaccines and Diagnostics, LLC Top agencies USDA (Department of Agriculture)	$525,875	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
54	Chenega Healthcare Services LLC Top agencies SSA (Social Security Administration)	$517,546	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
55	Murtech, Inc. Top agencies Army (Department of the Army)	$512,265	0.2%	Rank history: #18 in FY2021, #22 in FY2022, #26 in FY2023 and #42 in FY2025; down 29 since FY2023.
56	Pacific Biosciences of California, Inc. Top agencies HHS (Department of Health and Human Services)	$480,593	0.2%	Rank history: #66 in FY2021, #78 in FY2022, #76 in FY2023 and not on the FY2025 list; up 20 since FY2023.
57	Henry Schein, Inc. Top agencies DHA (Defense Health Agency) DLA (Defense Logistics Agency)	$465,271	0.2%	Rank history: #41 in FY2021, #50 in FY2022, #55 in FY2023 and #44 in FY2025; down 2 since FY2023.
58	Olink Proteomics Inc. Top agencies HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$462,985	0.1%	Rank history: not on the FY2021–FY2023 lists and #87 in FY2025; new.
59	Clear Labs Inc. 2 awardees Top agencies VA (Department of Veterans Affairs)	$461,062	0.1%	Rank history: #71 in FY2021, #38 in FY2022, #70 in FY2023 and #48 in FY2025; up 11 since FY2023.
60	Greer Laboratories, Inc. Top agencies DHA (Defense Health Agency)	$381,879	0.1%	Rank history: not on the FY2021–FY2023 lists and #16 in FY2025; new.
61	Cardinal Health Inc. 2 awardees, including Cardinal Health 414, LLC and Cardinal Health 200, LLC Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$337,061	0.1%	Rank history: #21 in FY2021, #40 in FY2022, not on the FY2023 list and not on the FY2025 list; returned.
62	The American National Red Cross Top agencies DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$333,700	0.1%	Rank history: #34 in FY2021, #37 in FY2022, #30 in FY2023 and #38 in FY2025; down 32 since FY2023.
63	Bloodworks Top agencies DHA (Defense Health Agency)	$317,039	0.1%	Rank history: not on the FY2021 list, #58 in FY2022, #62 in FY2023 and not on the FY2025 list; down 1 since FY2023.
64	MRIGLOBAL Top agencies HHS (Department of Health and Human Services)	$283,800	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
65	Immuno Mycologies Inc. Top agencies VA (Department of Veterans Affairs)	$264,485	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 67 since FY2023.
66	Cerilliant Corporation 3 awardees, including EMD Millipore Corp, Sigma-Aldrich, Inc. and Cell Marque Corp Top agencies HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$264,159	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
67	Genscript USA Inc. Top agencies HHS (Department of Health and Human Services)	$248,230	0.1%	Rank history: not on the FY2021–FY2022 lists, #42 in FY2023 and not on the FY2025 list; down 25 since FY2023.
68	Zeus Scientific, LLC Top agencies VA (Department of Veterans Affairs)	$247,154	0.1%	Rank history: #91 in FY2021, #98 in FY2022, not on the FY2023 list and #60 in FY2025; up 70 since FY2023.
69	Grifols Diagnostic Solutions Inc. Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$244,453	0.1%	Rank history: not on the FY2021–FY2023 lists and #31 in FY2025; new.
70	Waypoint LLC Top agencies Navy (Department of the Navy)	$240,115	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
71	Lifeshare Blood Center Top agencies VA (Department of Veterans Affairs)	$238,176	0.1%	Rank history: #51 in FY2021, #65 in FY2022, #64 in FY2023 and #67 in FY2025; down 7 since FY2023.
72	The Blood Center Top agencies VA (Department of Veterans Affairs)	$236,437	0.1%	Rank history: #44 in FY2021, #43 in FY2022, #65 in FY2023 and #57 in FY2025; down 7 since FY2023.
73	Keres Consulting Inc. Through Nativevet Materiel, LLC Top agencies HHS (Department of Health and Human Services)	$236,423	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
74	Nanostring Technologies, Inc. Top agencies HHS (Department of Health and Human Services)	$214,922	0.1%	Rank history: #68 in FY2021, not on the FY2022–FY2023 lists and not on the FY2025 list; up 55 since FY2023.
75	Hardy Diagnostics Top agencies HHS (Department of Health and Human Services) Navy (Department of the Navy)	$214,557	0.1%	Rank history: not on the FY2021–FY2022 lists, #83 in FY2023 and not on the FY2025 list; up 8 since FY2023.
76	STG Korea Inc Top agencies DHA (Defense Health Agency)	$212,469	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
77	Vmrd Inc. Top agencies USDA (Department of Agriculture)	$211,498	0.1%	Rank history: not on the FY2021–FY2023 lists and #56 in FY2025; new.
78	General Electric Company Through Medi-Physics, Inc. Top agencies VA (Department of Veterans Affairs)	$200,000	0.1%	Rank history: #59 in FY2021, #96 in FY2022, not on the FY2023 list and not on the FY2025 list; returned.
79	Promega Corporation Top agencies DHA (Defense Health Agency)	$182,677	0.1%	Rank history: not on the FY2021 list, #71 in FY2022, #60 in FY2023 and #77 in FY2025; down 19 since FY2023.
80	Alba Bioscience, Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$182,300	0.1%	Rank history: #64 in FY2021, #82 in FY2022, #71 in FY2023 and #71 in FY2025; down 9 since FY2023.
81	BMI Top agencies DHA (Defense Health Agency)	$181,250	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
82	Therakos LLC Top agencies HHS (Department of Health and Human Services)	$177,540	0.1%	Rank history: not on the FY2021–FY2023 lists and #83 in FY2025; new.
83	Radix Biosolutions LLC Top agencies HHS (Department of Health and Human Services)	$174,825	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
84	Orasure Technologies Inc. Top agencies HHS (Department of Health and Human Services) DLA (Defense Logistics Agency)	$173,915	0.1%	Rank history: not on the FY2021 list, #10 in FY2022, #8 in FY2023 and #62 in FY2025; down 76 since FY2023.
85	Eurofins Genomics LLC Top agencies HHS (Department of Health and Human Services)	$171,193	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
86	Helena Laboratories Corporation Top agencies VA (Department of Veterans Affairs)	$169,328	0.1%	Rank history: not on the FY2021–FY2023 lists and #89 in FY2025; up 50 since FY2023.
87	Cornerstone Diagnostics Inc. Top agencies VA (Department of Veterans Affairs)	$165,957	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 63 since FY2023.
88	State of Alaska Through State of Alaska Department of Health Top agencies USAF (Department of the Air Force)	$160,020	0.1%	Rank history: #90 in FY2021, not on the FY2022–FY2023 lists and not on the FY2025 list; up 17 since FY2023.
89	Meso Scale Diagnostics LLC Top agencies HHS (Department of Health and Human Services)	$158,147	0.1%	Rank history: not on the FY2021 list, #94 in FY2022, not on the FY2023 list and not on the FY2025 list; up 74 since FY2023.
90	Ahlstrom USA Inc. Top agencies DHA (Defense Health Agency)	$157,900	0.1%	Rank history: #60 in FY2021, #54 in FY2022, #91 in FY2023 and not on the FY2025 list; up 1 since FY2023.
91	Instrumentation Laboratory Japan Co. Ltd. Top agencies DHA (Defense Health Agency)	$154,857	0.1%	Rank history: not on the FY2021 list, #59 in FY2022, #90 in FY2023 and not on the FY2025 list; down 1 since FY2023.
92	Tosoh Corporation Through Tosoh Bioscience, Inc. Top agencies VA (Department of Veterans Affairs)	$153,306	<0.1%	Rank history: #75 in FY2021, not on the FY2022 list, #99 in FY2023 and not on the FY2025 list; up 7 since FY2023.
93	Gator Bio Inc. Top agencies HHS (Department of Health and Human Services)	$152,935	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
94	Cerus Corporation Top agencies DHA (Defense Health Agency)	$149,294	<0.1%	Rank history: not on the FY2021 list, #81 in FY2022, #81 in FY2023 and #63 in FY2025; down 13 since FY2023.
95	Ortho-Clinical Diagnostics Singapore PTE. Ltd. Korea Branch Through Ortho-Clinical Diagnostics Top agencies USAF (Department of the Air Force)	$132,352	<0.1%	Rank history: #65 in FY2021, not on the FY2022 list, #53 in FY2023 and not on the FY2025 list; down 42 since FY2023.
96	SL Meditech Co. Top agencies USAF (Department of the Air Force)	$128,300	<0.1%	Rank history: not on the FY2021–FY2023 lists and #85 in FY2025; up 117 since FY2023.
97	Ars Sales & Services LLC Top agencies DLA (Defense Logistics Agency)	$125,971	<0.1%	Rank history: #72 in FY2021, #74 in FY2022, not on the FY2023 list and not on the FY2025 list; up 76 since FY2023.
98	Cenmed Enterprises Inc. Top agencies DLA (Defense Logistics Agency)	$124,839	<0.1%	Rank history: not on the FY2021 list, #76 in FY2022, not on the FY2023 list and not on the FY2025 list; up 5 since FY2023.
99	Horizon Discovery Biosciences Limited Top agencies HHS (Department of Health and Human Services)	$121,295	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
100	Blood Systems Inc. Through Lifestream Blood Bank Top agencies DHA (Defense Health Agency)	$120,000	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.

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100 of 276 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 $309 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 2024 ran Oct 1, 2023 – Sep 30, 2024. 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 FY2023. "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 FY2023 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 FY2024?

1. Danaher Corporation ($29.1M), 2. Atlantic Trading LLC ($26.6M), 3. Beckman Coulter, Inc. ($14.2M), 4. Roche Holding AG ($13M), 5. Biomerieux Inc. ($11.7M), 6. Compagnie Merieux Alliance ($10.9M), 7. Abbott Laboratories Inc. ($7.51M), 8. Siemens Aktiengesellschaft ($6.58M), 9. Hologic, Inc. ($6.34M), 10. PPD Development LP ($5.62M).

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