Top 100 Contractors in NAICS 325413: In-Vitro Diagnostic Substance Manufacturing, FY2025

Name: Top 100 Contractors in NAICS 325413: In-Vitro Diagnostic Substance Manufacturing, FY2025
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2024 – Sep 30, 2025 Code page on GovTribe

The top 10 won 53% of FY2025 NAICS 325413 contract dollars

Contract obligations: $175,464,471 Net of deobligations, by contracts coded NAICS 325413
Contractors: 203 Parent companies with an obligation
Largest contractor: Danaher Corporation $38.7 million, 15.9% 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 7 awardees, including Cepheid, Beckman Coulter Gesellschaft MIT Beschraenkter Haftung and Leica Microsystems Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$38,674,873	15.9%	Rank history: #4 in FY2021, #5 in FY2022, #11 in FY2023 and #1 in FY2024; unchanged since FY2024.
2	Biomerieux Inc. 6 awardees, including Biofire Defense LLC, Biofire Diagnostics LLC and Biomerieux Deutschland GMBH Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) Army (Department of the Army)	$37,220,483	15.3%	Rank history: #85 in FY2021, not on the FY2022–FY2023 lists and #6 in FY2024; up 4 since FY2024.
3	Roche Holdings Inc. Through Roche Diagnostics Corporation Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) Army (Department of the Army)	$18,911,407	7.8%	Rank history: not on the FY2021–FY2024 lists; new.
4	Abbott Laboratories Inc. 5 awardees, including Abbott Molecular Inc. and Alere San Diego, Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) Army (Department of the Army)	$9,496,886	3.9%	Rank history: #1 in FY2021, #2 in FY2022, #3 in FY2023 and #38 in FY2024; up 34 since FY2024.
5	PPD Development LP 7 awardees, including Fisher Scientific Company L.L.C., One Lambda, Inc. and Microgenics Corporation Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$5,584,181	2.3%	Rank history: not on the FY2021–FY2022 lists, #49 in FY2023 and #7 in FY2024; up 2 since FY2024.
6	Hologic Sales and Service, LLC Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$5,050,501	2.1%	Rank history: not on the FY2021–FY2024 lists; new.
7	Ortho-Clinical Diagnostics Inc. 5 awardees, including Quidel Corp Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$4,441,278	1.8%	Rank history: #5 in FY2021, #43 in FY2022, #71 in FY2023 and #21 in FY2024; up 14 since FY2024.
8	Siemens Corporation Through Siemens Healthcare Diagnostics Inc. Top agencies HHS (Department of Health and Human Services) Navy (Department of the Navy) USAF (Department of the Air Force)	$4,149,994	1.7%	Rank history: not on the FY2021–FY2023 lists and #64 in FY2024; up 56 since FY2024.
9	Immucor Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) Army (Department of the Army)	$2,945,020	1.2%	Rank history: #18 in FY2021, #20 in FY2022, #27 in FY2023 and #12 in FY2024; up 3 since FY2024.
10	Diasorin S.P.A. Through Diasorin Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$2,693,029	1.1%	Rank history: not on the FY2021–FY2023 lists and #67 in FY2024; up 57 since FY2024.
11	Illumina, Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$2,474,800	1.0%	Rank history: #15 in FY2021, #29 in FY2022, #29 in FY2023 and #17 in FY2024; up 6 since FY2024.
12	Beckman Coulter, Inc. Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) Army (Department of the Army)	$2,369,451	1.0%	Rank history: not on the FY2021–FY2024 lists; new.
13	Sysmex America Inc. Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) Army (Department of the Army)	$2,342,467	1.0%	Rank history: not on the FY2021–FY2024 lists; new.
14	Werfen USA LLC Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$2,273,290	0.9%	Rank history: #52 in FY2021, #54 in FY2022, #47 in FY2023 and #37 in FY2024; up 23 since FY2024.
15	Sebia, Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$1,979,609	0.8%	Rank history: #42 in FY2021, #46 in FY2022, #38 in FY2023 and #23 in FY2024; up 8 since FY2024.
16	Government Scientific Source Inc. Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) HHS (Department of Health and Human Services)	$1,718,860	0.7%	Rank history: #20 in FY2021, #21 in FY2022, #32 in FY2023 and #27 in FY2024; up 11 since FY2024.
17	10X Genomics, Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs) USDA (Department of Agriculture)	$1,691,986	0.7%	Rank history: not on the FY2021 list, #33 in FY2022, #36 in FY2023 and #25 in FY2024; up 8 since FY2024.
18	Diagnostica Stago Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) Army (Department of the Army)	$1,648,784	0.7%	Rank history: not on the FY2021–FY2023 lists and #99 in FY2024; up 81 since FY2024.
19	Hologic, Inc. Top agencies DHA (Defense Health Agency) Army (Department of the Army) VA (Department of Veterans Affairs)	$1,632,346	0.7%	Rank history: #11 in FY2021, #14 in FY2022, #22 in FY2023 and #5 in FY2024; down 14 since FY2024.
20	Qiagen, LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$1,596,772	0.7%	Rank history: #32 in FY2021, #50 in FY2022, #39 in FY2023 and #24 in FY2024; up 4 since FY2024.
21	Abbott Molecular Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$1,246,606	0.5%	Rank history: not on the FY2021–FY2024 lists; new.
22	The Davinci Company, LLC Top agencies VA (Department of Veterans Affairs)	$1,152,634	0.5%	Rank history: not on the FY2021 list, #71 in FY2022, #35 in FY2023 and #29 in FY2024; up 7 since FY2024.
23	BIO - RAD Laboratories Gesellschaft MIT Beschraenkter Haftung 3 awardees, including Bio Rad Laboratories Inc. Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) DARPA (Defense Advanced Research Projects Agency)	$1,058,523	0.4%	Rank history: #31 in FY2021, #41 in FY2022, #40 in FY2023 and #19 in FY2024; down 4 since FY2024.
24	Luminex Corp Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) USDA (Department of Agriculture)	$910,792	0.4%	Rank history: #13 in FY2021, #22 in FY2022, #44 in FY2023 and #26 in FY2024; up 2 since FY2024.
25	The Binding Site. Inc. Top agencies VA (Department of Veterans Affairs)	$889,159	0.4%	Rank history: #45 in FY2021, #51 in FY2022, #48 in FY2023 and #32 in FY2024; up 7 since FY2024.
26	Branch Medical LLC Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) Navy (Department of the Navy)	$829,574	0.3%	Rank history: #43 in FY2021, #47 in FY2022, #51 in FY2023 and #34 in FY2024; up 8 since FY2024.
27	Ortho-Clinical Diagnostics Singapore Pte. Ltd. Korea Branch Top agencies DHA (Defense Health Agency)	$792,814	0.3%	Rank history: #46 in FY2021, not on the FY2022 list, #52 in FY2023 and #49 in FY2024; up 22 since FY2024.
28	Grifols Diagnostic Solutions Inc. Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$776,906	0.3%	Rank history: not on the FY2021–FY2023 lists and #74 in FY2024; up 46 since FY2024.
29	Cardinal Health 200, LLC Top agencies VA (Department of Veterans Affairs)	$737,662	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
30	Roche Diabetes Care Inc. Top agencies HHS (Department of Health and Human Services)	$718,148	0.3%	Rank history: not on the FY2021–FY2022 lists, #41 in FY2023 and not on the FY2024 list; returned.
31	Agilent Technologies, Inc. 2 awardees Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$666,427	0.3%	Rank history: not on the FY2021–FY2023 lists and #50 in FY2024; up 19 since FY2024.
32	Atos Medical Inc. Top agencies VA (Department of Veterans Affairs)	$646,301	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
33	Summit Shoji Inc. Top agencies DLA (Defense Logistics Agency)	$633,923	0.3%	Rank history: not on the FY2021 list, #64 in FY2022, #50 in FY2023 and #33 in FY2024; unchanged since FY2024.
34	Fisher Scientific Company L.L.C. Top agencies DHA (Defense Health Agency) DLA (Defense Logistics Agency) VA (Department of Veterans Affairs)	$622,941	0.3%	Rank history: not on the FY2021 list, #37 in FY2022 and not on the FY2023–FY2024 lists; returned.
35	Charm Sciences Inc. Top agencies USDA (Department of Agriculture) DLA (Defense Logistics Agency)	$607,764	0.2%	Rank history: #44 in FY2021, #60 in FY2022, #59 in FY2023 and #42 in FY2024; up 7 since FY2024.
36	Qualtex Laboratories Top agencies DHA (Defense Health Agency)	$604,080	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
37	Medpharm Inc. Top agencies DHA (Defense Health Agency)	$601,314	0.2%	Rank history: #75 in FY2021, #70 in FY2022, #75 in FY2023 and not on the FY2024 list; up 129 since FY2024.
38	ASE Direct, Inc. Top agencies VA (Department of Veterans Affairs)	$572,758	0.2%	Rank history: #19 in FY2021, #23 in FY2022, #33 in FY2023 and #11 in FY2024; down 27 since FY2024.
39	Reidy Medical Supply Inc. Top agencies VA (Department of Veterans Affairs)	$558,050	0.2%	Rank history: not on the FY2021–FY2023 lists and #63 in FY2024; up 24 since FY2024.
40	Phadia US Inc. Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$521,849	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
41	Cidichem S.R.L. Top agencies Navy (Department of the Navy)	$514,991	0.2%	Rank history: not on the FY2021–FY2023 lists and #72 in FY2024; up 31 since FY2024.
42	Medela LLC 2 awardees Top agencies VA (Department of Veterans Affairs)	$471,331	0.2%	Rank history: not on the FY2021–FY2023 lists and #78 in FY2024; up 36 since FY2024.
43	Henry Schein, Inc. Top agencies DHA (Defense Health Agency)	$461,976	0.2%	Rank history: #57 in FY2021, #68 in FY2022, #68 in FY2023 and #53 in FY2024; up 10 since FY2024.
44	Cytopath Biopsy Lab Inc. Top agencies VA (Department of Veterans Affairs)	$450,000	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
45	SL Meditech Co. Top agencies DHA (Defense Health Agency)	$445,800	0.2%	Rank history: not on the FY2021–FY2023 lists and #66 in FY2024; up 21 since FY2024.
46	Promega Corporation Top agencies DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$415,517	0.2%	Rank history: #54 in FY2021, #61 in FY2022, #57 in FY2023 and #59 in FY2024; up 13 since FY2024.
47	Bracco U.S.a. Inc. Through Bracco Diagnostics Inc. Top agencies DHA (Defense Health Agency)	$407,844	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
48	Immuno Mycologies Inc. Top agencies VA (Department of Veterans Affairs)	$382,541	0.2%	Rank history: not on the FY2021–FY2023 lists and #70 in FY2024; up 22 since FY2024.
49	Cencora, Inc. 2 awardees, including Amerisourcebergen Drug Corp and ASD Specialty Healthcare, LLC Top agencies VA (Department of Veterans Affairs)	$362,602	0.1%	Rank history: not on the FY2021–FY2023 lists and #9 in FY2024; down 40 since FY2024.
50	Red Heritage Medical LLC Top agencies HHS (Department of Health and Human Services)	$341,500	0.1%	Rank history: not on the FY2021–FY2023 lists and #86 in FY2024; up 36 since FY2024.
51	Ahlstrom USA Inc. Top agencies DHA (Defense Health Agency)	$324,160	0.1%	Rank history: #74 in FY2021, #79 in FY2022, #67 in FY2023 and #57 in FY2024; up 6 since FY2024.
52	Alamar Biosciences, Inc. Top agencies HHS (Department of Health and Human Services)	$324,000	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
53	Vmrd Inc. Top agencies USDA (Department of Agriculture)	$320,709	0.1%	Rank history: #96 in FY2021, not on the FY2022 list, #77 in FY2023 and #82 in FY2024; up 29 since FY2024.
54	Alba Bioscience, Inc. Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) DHA (Defense Health Agency)	$306,225	0.1%	Rank history: #72 in FY2021, #87 in FY2022, #80 in FY2023 and #69 in FY2024; up 15 since FY2024.
55	Bighorn Ridgerunners, LLC Top agencies HHS (Department of Health and Human Services)	$298,000	0.1%	Rank history: not on the FY2021–FY2024 lists; up 127 since FY2024.
56	Cerus Corporation Top agencies DHA (Defense Health Agency)	$287,400	0.1%	Rank history: not on the FY2021 list, #90 in FY2022, #89 in FY2023 and #87 in FY2024; up 31 since FY2024.
57	Tosoh Bioscience, Inc. Top agencies VA (Department of Veterans Affairs)	$284,965	0.1%	Rank history: not on the FY2021–FY2023 lists and #79 in FY2024; up 22 since FY2024.
58	Meso Scale Diagnostics LLC Top agencies Navy (Department of the Navy) USUHS (DOD Uniformed Services University of the Health Sciences) HHS (Department of Health and Human Services)	$268,061	0.1%	Rank history: #16 in FY2021, #35 in FY2022, #46 in FY2023 and #52 in FY2024; down 6 since FY2024.
59	Zeus Scientific, LLC Top agencies VA (Department of Veterans Affairs)	$262,423	0.1%	Rank history: not on the FY2021–FY2023 lists and #71 in FY2024; up 12 since FY2024.
60	Quidelortho Sales Company, LLC Top agencies DHA (Defense Health Agency)	$262,017	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
61	Franklin Young International, Incorporated Top agencies DHA (Defense Health Agency) Navy (Department of the Navy) USAF (Department of the Air Force)	$249,689	0.1%	Rank history: #73 in FY2021, #97 in FY2022, #86 in FY2023 and #65 in FY2024; up 4 since FY2024.
62	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 and not on the FY2024 list; returned.
63	Nova Biomedical Corp Top agencies DHA (Defense Health Agency)	$240,466	0.1%	Rank history: not on the FY2021–FY2024 lists; up 89 since FY2024.
64	Orasure Technologies Inc. Top agencies HHS (Department of Health and Human Services) DLA (Defense Logistics Agency)	$238,749	0.1%	Rank history: #10 in FY2021, #59 in FY2022, #9 in FY2023 and not on the FY2024 list; returned.
65	Otsuka Holdings Co. Ltd. Through Cambridge Isotope Laboratories, Inc. Top agencies HHS (Department of Health and Human Services)	$233,095	0.1%	Rank history: not on the FY2021–FY2023 lists and #100 in FY2024; up 35 since FY2024.
66	Veterans Healthcare Supply Solutions, Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$230,294	0.1%	Rank history: #12 in FY2021, #18 in FY2022, #62 in FY2023 and not on the FY2024 list; returned.
67	Helena Laboratories Corporation Top agencies VA (Department of Veterans Affairs)	$228,298	0.1%	Rank history: not on the FY2021–FY2023 lists and #88 in FY2024; up 21 since FY2024.
68	Polymedco Cancer Diagnostic Products LLC Top agencies VA (Department of Veterans Affairs)	$222,840	0.1%	Rank history: not on the FY2021–FY2024 lists; up 138 since FY2024.
69	Caredx, Inc. Top agencies VA (Department of Veterans Affairs)	$221,579	0.1%	Rank history: not on the FY2021–FY2023 lists and #96 in FY2024; up 27 since FY2024.
70	Derrah Morrison Enterprises LLC Top agencies VA (Department of Veterans Affairs)	$199,745	0.1%	Rank history: not on the FY2021–FY2024 lists; up 38 since FY2024.
71	Meta Systems Group Inc. Top agencies VA (Department of Veterans Affairs)	$198,900	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
72	J & N Marketing, Inc. Top agencies HHS (Department of Health and Human Services)	$198,301	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
73	Hawaii Department of Health Top agencies DHA (Defense Health Agency)	$195,300	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
74	Aptagen LLC Top agencies DHA (Defense Health Agency)	$194,220	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
75	Neogen Corp Top agencies USDA (Department of Agriculture)	$193,835	0.1%	Rank history: not on the FY2021–FY2024 lists; up 31 since FY2024.
76	Pharmacy Buying Association, Inc. Top agencies VA (Department of Veterans Affairs)	$189,875	0.1%	Rank history: not on the FY2021 list, #38 in FY2022, #43 in FY2023 and #48 in FY2024; down 28 since FY2024.
77	Hardy Diagnostics Top agencies HHS (Department of Health and Human Services)	$188,570	0.1%	Rank history: not on the FY2021–FY2022 lists, #93 in FY2023 and #76 in FY2024; down 1 since FY2024.
78	Polymedco LLC Top agencies VA (Department of Veterans Affairs)	$186,337	0.1%	Rank history: #87 in FY2021, #67 in FY2022, #65 in FY2023 and #56 in FY2024; down 22 since FY2024.
79	Therakos LLC Top agencies HHS (Department of Health and Human Services)	$181,860	0.1%	Rank history: not on the FY2021–FY2023 lists and #68 in FY2024; down 11 since FY2024.
80	Thermo Electron Corporation Through Phadia US Inc. Top agencies DHA (Defense Health Agency)	$180,473	0.1%	Rank history: #3 in FY2021, #15 in FY2022, #20 in FY2023 and #18 in FY2024; down 62 since FY2024.
81	Meditrade Medical Trading GMBH Top agencies DHA (Defense Health Agency)	$180,394	0.1%	Rank history: not on the FY2021–FY2022 lists, #42 in FY2023 and not on the FY2024 list; returned.
82	SZY Holdings, LLC Top agencies DLA (Defense Logistics Agency)	$179,137	0.1%	Rank history: #93 in FY2021, not on the FY2022–FY2023 lists and #80 in FY2024; down 2 since FY2024.
83	Regimed Medical Top agencies VA (Department of Veterans Affairs)	$172,692	0.1%	Rank history: not on the FY2021–FY2024 lists; up 60 since FY2024.
84	Mapp Biopharmaceutical, Inc. Top agencies DHA (Defense Health Agency)	$171,000	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
85	Asuragen Incorporated Top agencies Army (Department of the Army)	$169,115	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
86	Grace International Services LLC Top agencies VA (Department of Veterans Affairs)	$164,400	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
87	Edge Biosystems Inc. Top agencies DHA (Defense Health Agency)	$160,784	0.1%	Rank history: not on the FY2021–FY2024 lists; up 24 since FY2024.
88	McKesson Corporation 2 awardees, including Mckesson Medical-Surgical Government Solutions LLC Top agencies HHS (Department of Health and Human Services) DLA (Defense Logistics Agency)	$150,793	0.1%	Rank history: not on the FY2021–FY2023 lists and #85 in FY2024; down 3 since FY2024.
89	Trilink Biotechnologies, LLC Top agencies EPA (Environmental Protection Agency)	$150,000	0.1%	Rank history: not on the FY2021–FY2024 lists; up 113 since FY2024.
90	STG Korea Inc. Top agencies DHA (Defense Health Agency)	$141,879	0.1%	Rank history: not on the FY2021–FY2024 lists; up 114 since FY2024.
91	Communications Professionals Inc. Top agencies USDA (Department of Agriculture)	$138,104	0.1%	Rank history: not on the FY2021–FY2024 lists; up 14 since FY2024.
92	Bio-Techne Sales Corporation Top agencies Army (Department of the Army) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$135,389	0.1%	Rank history: not on the FY2021–FY2024 lists; up 86 since FY2024.
93	Terumo BCT Inc Top agencies HHS (Department of Health and Human Services)	$135,367	0.1%	Rank history: not on the FY2021–FY2023 lists and #47 in FY2024; down 46 since FY2024.
94	University of Maryland, Baltimore Top agencies VA (Department of Veterans Affairs)	$132,940	0.1%	Rank history: not on the FY2021–FY2023 lists and #30 in FY2024; down 64 since FY2024.
95	Invetech US LLC Top agencies HHS (Department of Health and Human Services)	$124,000	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
96	Alfresa Corporation Top agencies DLA (Defense Logistics Agency)	$115,030	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 18 since FY2024.
97	Oxford Nanopore Technologies, Inc. Top agencies HHS (Department of Health and Human Services)	$114,702	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 10 since FY2024.
98	Geo-Med, LLC Top agencies VA (Department of Veterans Affairs)	$111,781	<0.1%	Rank history: #60 in FY2021, not on the FY2022–FY2023 lists and #46 in FY2024; down 52 since FY2024.
99	Roche Holding AG Through Genmark Diagnostics, Inc. Top agencies VA (Department of Veterans Affairs)	$111,512	<0.1%	Rank history: #7 in FY2021, #4 in FY2022, #5 in FY2023 and #3 in FY2024; down 96 since FY2024.
100	Streck LLC Top agencies VA (Department of Veterans Affairs)	$106,888	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.

Show 75 more

100 of 203 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 $244 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 2025 ran Oct 1, 2024 – Sep 30, 2025. 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 FY2024. "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 FY2024 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 NAICS 325413 contractors in FY2025?

1. Danaher Corporation ($38.7M), 2. Biomerieux Inc. ($37.2M), 3. Roche Holdings Inc. ($18.9M), 4. Abbott Laboratories Inc. ($9.5M), 5. PPD Development LP ($5.58M), 6. Hologic Sales and Service, LLC ($5.05M), 7. Ortho-Clinical Diagnostics Inc. ($4.44M), 8. Siemens Corporation ($4.15M), 9. Immucor Inc. ($2.95M), 10. Diasorin S.P.A. ($2.69M).

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