Top 100 Contractors in PSC J066: Maintenance, Repair and Rebuilding of Equipment: Instruments and Laboratory Equipment, Aug 2025–Jul 2026

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Blackwatch International Corporation Top agencies DMEA (Defense Microelectronics Activity)	$128,006,396	32.2%	Rank history: #8 in FY2021, #6 in FY2022, #5 in FY2023, #12 in FY2024 and #3 in FY2025; up 3 since Aug 2024–Jul 2025.
2	Thermo Fisher Scientific Inc. 9 awardees, including Thermo Electron North America LLC, Life Technologies Corporation and FEI Company Top agencies HHS (Department of Health and Human Services) Navy (Department of the Navy) DHA (Defense Health Agency)	$18,993,814	4.8%	Rank history: not on the FY2021–FY2022 lists, #15 in FY2023, #1 in FY2024 and #1 in FY2025; down 1 since Aug 2024–Jul 2025.
3	The Remi Group LLC Top agencies HHS (Department of Health and Human Services) USDA (Department of Agriculture) Army (Department of the Army)	$13,225,208	3.3%	Rank history: #19 in FY2021, #30 in FY2022, #21 in FY2023, #6 in FY2024 and #5 in FY2025; up 3 since Aug 2024–Jul 2025.
4	Danaher Corporation 11 awardees, including AB Sciex LLC, Leica Microsystems Inc. and Cepheid Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs) USDA (Department of Agriculture)	$12,020,207	3.0%	Rank history: #2 in FY2021, #3 in FY2022, #3 in FY2023, #3 in FY2024 and #4 in FY2025; up 1 since Aug 2024–Jul 2025.
5	Astronautics Corporation of America Through Kearfott Corporation Top agencies USAF (Department of the Air Force)	$11,788,431	3.0%	Rank history: #11 in FY2021, #19 in FY2022, #9 in FY2023, #5 in FY2024 and #6 in FY2025; down 3 since Aug 2024–Jul 2025.
6	Agilent Technologies, Inc. 4 awardees Top agencies HHS (Department of Health and Human Services) Army (Department of the Army) DHA (Defense Health Agency)	$10,003,986	2.5%	Rank history: not on the FY2021–FY2023 lists, #7 in FY2024 and #8 in FY2025; up 3 since Aug 2024–Jul 2025.
7	Goldbelt, Incorporated 2 awardees, including Goldbelt Frontier, LLC and Peregrine Technical Solutions, LLC Top agencies HHS (Department of Health and Human Services) Navy (Department of the Navy)	$8,963,271	2.3%	Rank history: not on the FY2021–FY2022 lists, #41 in FY2023, not on the FY2024 list and #9 in FY2025; new, not ranked in Aug 2024–Jul 2025.
8	Laboratory Equipment Service, LLC Top agencies HHS (Department of Health and Human Services)	$8,425,164	2.1%	Rank history: not on the FY2021 list, #11 in FY2022, #10 in FY2023, #9 in FY2024 and #7 in FY2025; unchanged since Aug 2024–Jul 2025.
9	L3Harris Technologies, Inc. 4 awardees, including L3Harris Global Communications, Inc. Top agencies USAF (Department of the Air Force) DHS (Department of Homeland Security)	$4,900,601	1.2%	Rank history: #47 in FY2021, #17 in FY2022, #35 in FY2023, not on the FY2024 list and #17 in FY2025; up 45 since Aug 2024–Jul 2025.
10	Waters Corporation 3 awardees, including Waters Technologies Corporation and Wyatt Technology, LLC Top agencies HHS (Department of Health and Human Services) EPA (Environmental Protection Agency) USDA (Department of Agriculture)	$4,712,018	1.2%	Rank history: #16 in FY2021, #12 in FY2022, #12 in FY2023, #28 in FY2024 and #12 in FY2025; up 289 since Aug 2024–Jul 2025.
11	RTX Corporation 13 awardees, including Rockwell Collins, Inc., Hamilton Sundstrand De Puerto Rico, Inc. and Rosemount Aerospace Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$4,649,505	1.2%	Rank history: #3 in FY2021, #4 in FY2022, #6 in FY2023, #13 in FY2024 and #30 in FY2025; up 20 since Aug 2024–Jul 2025.
12	Becton, Dickinson and Co 6 awardees, including Carefusion Solutions, LLC Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$4,622,419	1.2%	Rank history: #13 in FY2021, #7 in FY2022, #8 in FY2023, #8 in FY2024 and #10 in FY2025; down 2 since Aug 2024–Jul 2025.
13	Mclaughlin Research Corporation Top agencies Navy (Department of the Navy)	$4,448,110	1.1%	Rank history: #21 in FY2021, #41 in FY2022, #13 in FY2023, #10 in FY2024 and #14 in FY2025; down 2 since Aug 2024–Jul 2025.
14	General Electric Company 7 awardees, including GE Aviation Systems LLC, GE Precision Healthcare LLC and GE Medical Systems Information Technologies, Inc. Top agencies USAF (Department of the Air Force) HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$4,115,278	1.0%	Rank history: #31 in FY2021, #44 in FY2022, #27 in FY2023, #37 in FY2024 and #20 in FY2025; up 11 since Aug 2024–Jul 2025.
15	Integrated Production Systems, Inc. Top agencies Army (Department of the Army)	$3,902,045	1.0%	Rank history: #41 in FY2021, #29 in FY2022, #28 in FY2023, #19 in FY2024 and #24 in FY2025; up 5 since Aug 2024–Jul 2025.
16	Illumina, Inc. Top agencies HHS (Department of Health and Human Services) USDA (Department of Agriculture) VA (Department of Veterans Affairs)	$3,870,306	1.0%	Rank history: #17 in FY2021, #10 in FY2022, #11 in FY2023, #11 in FY2024 and #11 in FY2025; down 3 since Aug 2024–Jul 2025.
17	Science Applications International Corporation Top agencies Navy (Department of the Navy)	$3,741,441	0.9%	Rank history: #4 in FY2021, #2 in FY2022, #2 in FY2023, #4 in FY2024 and #2 in FY2025; down 14 since Aug 2024–Jul 2025.
18	Kbr, Inc. 2 awardees, including KBR Wyle Services, LLC Top agencies DOI (Department of the Interior)	$3,624,046	0.9%	Rank history: #40 in FY2021, #16 in FY2022, #19 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
19	Honeywell International Inc. 2 awardees Top agencies USAF (Department of the Air Force)	$3,566,188	0.9%	Rank history: not on the FY2021–FY2023 lists, #24 in FY2024 and not on the FY2025 list; up 2 since Aug 2024–Jul 2025.
20	Revvity Inc. 2 awardees, including Revvity Health Sciences, Inc. Top agencies HHS (Department of Health and Human Services) USAF (Department of the Air Force) Army (Department of the Army)	$3,289,685	0.8%	Rank history: #18 in FY2021, #13 in FY2022, #22 in FY2023, #95 in FY2024 and #22 in FY2025; new, not ranked in Aug 2024–Jul 2025.
21	Bruker Scientific LLC 4 awardees, including Bruker Biospin Corp and Bruker Detection Corp Top agencies HHS (Department of Health and Human Services) USDA (Department of Agriculture) DHA (Defense Health Agency)	$2,855,661	0.7%	Rank history: #27 in FY2021, #22 in FY2022, #14 in FY2023, #16 in FY2024 and #16 in FY2025; down 4 since Aug 2024–Jul 2025.
22	Siemens Corporation 5 awardees, including Siemens Medical Solutions Usa, Inc., Siemens Healthcare Diagnostics Inc. and Siemens Industry Inc. Top agencies HHS (Department of Health and Human Services) DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$2,843,868	0.7%	Rank history: not on the FY2021–FY2023 lists, #40 in FY2024 and #23 in FY2025; up 19 since Aug 2024–Jul 2025.
23	Ghostrock Systems Development LLC Top agencies Navy (Department of the Navy)	$2,765,628	0.7%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
24	Getinge USA Sales, LLC Top agencies DHA (Defense Health Agency) HHS (Department of Health and Human Services) Army (Department of the Army)	$2,715,407	0.7%	Rank history: #99 in FY2021, not on the FY2022–FY2023 lists, #14 in FY2024 and #18 in FY2025; down 10 since Aug 2024–Jul 2025.
25	Agiliti Health Inc Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) Army (Department of the Army)	$2,689,892	0.7%	Rank history: #30 in FY2021, not on the FY2022–FY2023 lists, #45 in FY2024 and #21 in FY2025; up 131 since Aug 2024–Jul 2025.
26	Carl Zeiss Microscopy, LLC Top agencies HHS (Department of Health and Human Services) USAF (Department of the Air Force) USUHS (DOD Uniformed Services University of the Health Sciences)	$2,456,638	0.6%	Rank history: not on the FY2021–FY2024 lists and #27 in FY2025; up 4 since Aug 2024–Jul 2025.
27	Jeol Usa, Inc. Top agencies Commerce (Department of Commerce) Army (Department of the Army) Navy (Department of the Navy)	$2,312,478	0.6%	Rank history: not on the FY2021–FY2023 lists, #48 in FY2024 and #33 in FY2025; unchanged since Aug 2024–Jul 2025.
28	Illinois Tool Works Inc. 3 awardees, including North Star Imaging Incorporated and MTS Systems Corporation Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$2,299,260	0.6%	Rank history: #89 in FY2021, #76 in FY2022, #43 in FY2023, #27 in FY2024 and #32 in FY2025; down 2 since Aug 2024–Jul 2025.
29	Ametek Inc. 15 awardees, including Gatan Inc., Cameca Instruments, Inc. and Spectro Analytical Instruments, Inc. Top agencies Navy (Department of the Navy) HHS (Department of Health and Human Services) Army (Department of the Army)	$2,089,807	0.5%	Rank history: #25 in FY2021, #26 in FY2022, #20 in FY2023, #25 in FY2024 and #36 in FY2025; up 125 since Aug 2024–Jul 2025.
30	Rees Scientific Corporation Top agencies HHS (Department of Health and Human Services) DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$2,065,868	0.5%	Rank history: #42 in FY2021, #38 in FY2022, #30 in FY2023, #22 in FY2024 and #26 in FY2025; down 7 since Aug 2024–Jul 2025.
31	Tyco Fire Products LP 2 awardees, including Johnson Controls, Inc. and Johnson Controls Fire Protection LP Top agencies USAF (Department of the Air Force) USDA (Department of Agriculture)	$1,991,048	0.5%	Rank history: not on the FY2021–FY2024 lists and #31 in FY2025; new, not ranked in Aug 2024–Jul 2025.
32	UnitedHealth Group Incorporated Through Change Healthcare Technologies LLC Top agencies VA (Department of Veterans Affairs)	$1,827,551	0.5%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
33	Translogic Corporation Top agencies VA (Department of Veterans Affairs)	$1,758,906	0.4%	Rank history: not on the FY2021–FY2024 lists and #34 in FY2025; new, not ranked in Aug 2024–Jul 2025.
34	Nexus Group, LLC Top agencies HHS (Department of Health and Human Services) Army (Department of the Army) VA (Department of Veterans Affairs)	$1,617,662	0.4%	Rank history: not on the FY2021–FY2023 lists, #38 in FY2024 and #42 in FY2025; up 4 since Aug 2024–Jul 2025.
35	Keysight Technologies, Inc. 5 awardees, including Spirent Federal Systems Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$1,612,444	0.4%	Rank history: #87 in FY2021, #61 in FY2022, #45 in FY2023, #34 in FY2024 and #28 in FY2025; down 3 since Aug 2024–Jul 2025.
36	Steris Corporation 2 awardees, including Steris Instrument Management Services, Inc. Top agencies USDA (Department of Agriculture) VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$1,426,536	0.4%	Rank history: not on the FY2021–FY2023 lists, #54 in FY2024 and #40 in FY2025; up 12 since Aug 2024–Jul 2025.
37	SAFRAN 2 awardees, including Talen-X, Inc. and Safran Electronics & Defense, Avionics Usa, LLC Top agencies Army (Department of the Army) DHS (Department of Homeland Security)	$1,396,135	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
38	KD Analytical Consulting LLC Top agencies DHS (Department of Homeland Security) Navy (Department of the Navy)	$1,337,404	0.3%	Rank history: not on the FY2021–FY2023 lists, #50 in FY2024 and #50 in FY2025; up 11 since Aug 2024–Jul 2025.
39	Tecan U.S. Group Inc. Through Tecan U.s., Inc. Top agencies HHS (Department of Health and Human Services) DOJ (Department of Justice) VA (Department of Veterans Affairs)	$1,312,690	0.3%	Rank history: not on the FY2021–FY2023 lists, #33 in FY2024 and #48 in FY2025; up 5 since Aug 2024–Jul 2025.
40	Guidehouse Inc. Through Peraton Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$1,256,028	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
41	RV Global Solutions Inc. Top agencies Army (Department of the Army)	$1,190,079	0.3%	Rank history: #98 in FY2021, not on the FY2022–FY2024 lists and #52 in FY2025; up 116 since Aug 2024–Jul 2025.
42	Perkinelmer U.s. LLC 2 awardees, including Covaris, LLC Top agencies Army (Department of the Army) Treasury (Department of the Treasury) EPA (Environmental Protection Agency)	$1,189,630	0.3%	Rank history: not on the FY2021–FY2022 lists, #73 in FY2023, #29 in FY2024 and #25 in FY2025; down 24 since Aug 2024–Jul 2025.
43	V.j. Technologies, Inc. Top agencies Army (Department of the Army)	$1,160,458	0.3%	Rank history: not on the FY2021 list, #63 in FY2022, not on the FY2023 list, #31 in FY2024 and #53 in FY2025; up 14 since Aug 2024–Jul 2025.
44	Vanderlande Industries Inc. Through Uster Technologies, Inc. Top agencies USDA (Department of Agriculture)	$1,151,260	0.3%	Rank history: not on the FY2021–FY2023 lists, #35 in FY2024 and #82 in FY2025; down 7 since Aug 2024–Jul 2025.
45	Full Spectrum Group, LLC Top agencies DHS (Department of Homeland Security) Army (Department of the Army) EPA (Environmental Protection Agency)	$1,131,344	0.3%	Rank history: #52 in FY2021, #54 in FY2022, #54 in FY2023, #46 in FY2024 and #47 in FY2025; unchanged since Aug 2024–Jul 2025.
46	Kaihonua LLC Top agencies Navy (Department of the Navy)	$1,073,249	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
47	Koninklijke Philips N.V. 3 awardees, including Philips North America LLC Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs) USUHS (DOD Uniformed Services University of the Health Sciences)	$1,044,141	0.3%	Rank history: #32 in FY2021, #32 in FY2022, #44 in FY2023, not on the FY2024 list and #43 in FY2025; new, not ranked in Aug 2024–Jul 2025.
48	Fortive Corporation 3 awardees, including Fluke Electronics Corp, Landauer, Inc. and Advanced Sterilization Products Services Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) DHA (Defense Health Agency)	$988,481	0.2%	Rank history: not on the FY2021–FY2023 lists, #82 in FY2024 and #49 in FY2025; up 50 since Aug 2024–Jul 2025.
49	Advanced Testing Technologies Inc. Top agencies USAF (Department of the Air Force)	$963,528	0.2%	Rank history: #33 in FY2021, #21 in FY2022, #42 in FY2023, #32 in FY2024 and #41 in FY2025; down 9 since Aug 2024–Jul 2025.
50	Northrop Grumman Systems Corporation 2 awardees Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$952,168	0.2%	Rank history: #34 in FY2021, #40 in FY2022, #29 in FY2023, #61 in FY2024 and #29 in FY2025; down 28 since Aug 2024–Jul 2025.
51	Olmsted Instrument Co Top agencies USAF (Department of the Air Force)	$928,700	0.2%	Rank history: #45 in FY2021, #37 in FY2022, #46 in FY2023, not on the FY2024 list and #51 in FY2025; up 9 since Aug 2024–Jul 2025.
52	Hamilton Company Top agencies Navy (Department of the Navy) HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$921,288	0.2%	Rank history: not on the FY2021–FY2024 lists and #54 in FY2025; up 4 since Aug 2024–Jul 2025.
53	Cytek Biosciences Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs) Commerce (Department of Commerce)	$886,946	0.2%	Rank history: not on the FY2021–FY2024 lists and #45 in FY2025; down 10 since Aug 2024–Jul 2025.
54	Gastops Inc. Top agencies USAF (Department of the Air Force)	$873,371	0.2%	Rank history: not on the FY2021–FY2025 lists; up 4 since Aug 2024–Jul 2025.
55	Abbott Laboratories Inc. 6 awardees, including Abbott Molecular Inc., Abbott Rapid DX North America LLC and Alere San Diego, Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$863,550	0.2%	Rank history: not on the FY2021–FY2024 lists and #92 in FY2025; up 66 since Aug 2024–Jul 2025.
56	Bruker AXS LLC 3 awardees, including Bruker Spatial Biology, Inc. and Bruker Nano, Inc. Top agencies Navy (Department of the Navy) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$849,380	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
57	Hitachi, Ltd. 2 awardees, including Hitachi High-Tech America, Inc. Top agencies Navy (Department of the Navy) Treasury (Department of the Treasury) USAF (Department of the Air Force)	$821,729	0.2%	Rank history: #91 in FY2021, #69 in FY2022, #64 in FY2023, #73 in FY2024 and #57 in FY2025; up 7 since Aug 2024–Jul 2025.
58	Biomerieux Inc. Top agencies VA (Department of Veterans Affairs) USDA (Department of Agriculture) HHS (Department of Health and Human Services)	$807,195	0.2%	Rank history: not on the FY2021–FY2025 lists; up 131 since Aug 2024–Jul 2025.
59	Peak Scientific Inc. Top agencies Navy (Department of the Navy) HHS (Department of Health and Human Services) USDA (Department of Agriculture)	$768,069	0.2%	Rank history: not on the FY2021–FY2022 lists, #90 in FY2023, #90 in FY2024 and #64 in FY2025; up 227 since Aug 2024–Jul 2025.
60	Evoqua Water Technologies LLC 2 awardees, including CMS Research Corp Top agencies Army (Department of the Army) USDA (Department of Agriculture)	$735,118	0.2%	Rank history: not on the FY2021–FY2023 lists, #87 in FY2024 and #67 in FY2025; down 8 since Aug 2024–Jul 2025.
61	American Surgical Instrument Repair LLC Top agencies VA (Department of Veterans Affairs)	$709,881	0.2%	Rank history: not on the FY2021–FY2023 lists, #85 in FY2024 and #44 in FY2025; down 19 since Aug 2024–Jul 2025.
62	The Presray Corporation Top agencies USDA (Department of Agriculture)	$674,515	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
63	Shimadzu America Inc. 2 awardees, including Shimadzu Scientific Instruments, Inc. and Shimadzu Precision Instruments, Inc. Top agencies HHS (Department of Health and Human Services) Navy (Department of the Navy) VA (Department of Veterans Affairs)	$665,344	0.2%	Rank history: not on the FY2021–FY2023 lists, #92 in FY2024 and #77 in FY2025; up 8 since Aug 2024–Jul 2025.
64	Orion Strategic Solutions, LLC Top agencies Navy (Department of the Navy)	$639,318	0.2%	Rank history: not on the FY2021–FY2024 lists and #66 in FY2025; down 3 since Aug 2024–Jul 2025.
65	Oxford Instruments America, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) EPA (Environmental Protection Agency)	$630,136	0.2%	Rank history: not on the FY2021–FY2023 lists, #86 in FY2024 and #87 in FY2025; up 5 since Aug 2024–Jul 2025.
66	Trillamed LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$628,211	0.2%	Rank history: not on the FY2021–FY2024 lists and #56 in FY2025; up 58 since Aug 2024–Jul 2025.
67	Trustwave Government Solutions LLC 3 awardees, including Element Materials Technology Huntington Beach LLC, Miltope Corporation and ST Engineering Aethon Inc. Top agencies USAF (Department of the Air Force) VA (Department of Veterans Affairs)	$619,267	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
68	Mallory Engineering, Inc. Top agencies Army (Department of the Army)	$599,069	0.2%	Rank history: not on the FY2021–FY2024 lists and #98 in FY2025; up 107 since Aug 2024–Jul 2025.
69	Draeger Inc. 2 awardees, including Draeger Italia S.P.A. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$597,473	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
70	CMS Research Corp 2 awardees, including Evoqua Water Technologies LLC Top agencies Army (Department of the Army) DTRA (Defense Threat Reduction Agency) VA (Department of Veterans Affairs)	$583,022	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
71	Tektronix, Inc. 2 awardees, including Advanced Sterilization Products Espana SL. Top agencies Navy (Department of the Navy) DMEA (Defense Microelectronics Activity)	$581,439	0.1%	Rank history: not on the FY2021–FY2024 lists and #75 in FY2025; new, not ranked in Aug 2024–Jul 2025.
72	The Bionetics Corporation Top agencies HHS (Department of Health and Human Services)	$558,150	0.1%	Rank history: not on the FY2021–FY2022 lists, #55 in FY2023, #65 in FY2024 and #72 in FY2025; down 6 since Aug 2024–Jul 2025.
73	Franklin Young International, Incorporated Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy) HHS (Department of Health and Human Services)	$552,842	0.1%	Rank history: #58 in FY2021, #57 in FY2022, #67 in FY2023, #78 in FY2024 and #65 in FY2025; up 12 since Aug 2024–Jul 2025.
74	Hologic, Inc. 3 awardees, including Hologic Sales and Service, LLC and Gen-Probe Incorporated Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) Navy (Department of the Navy)	$551,869	0.1%	Rank history: #60 in FY2021, not on the FY2022–FY2024 lists and #55 in FY2025; up 4 since Aug 2024–Jul 2025.
75	Mirion Technologies (Canberra), Inc. 5 awardees, including Sun Nuclear Corp. and Mirion Technologies (Capintec), Inc. Top agencies DHA (Defense Health Agency) Navy (Department of the Navy) VA (Department of Veterans Affairs)	$524,303	0.1%	Rank history: not on the FY2021–FY2023 lists, #44 in FY2024 and #37 in FY2025; down 51 since Aug 2024–Jul 2025.
76	Qiagen, LLC Top agencies Army (Department of the Army) DHA (Defense Health Agency) USDA (Department of Agriculture)	$521,102	0.1%	Rank history: not on the FY2021–FY2023 lists, #41 in FY2024 and #76 in FY2025; down 1 since Aug 2024–Jul 2025.
77	Martin Aijs LLC Top agencies VA (Department of Veterans Affairs)	$500,322	0.1%	Rank history: not on the FY2021–FY2024 lists and #58 in FY2025; down 31 since Aug 2024–Jul 2025.
78	Electronic Risks Consultants, Inc. Top agencies HHS (Department of Health and Human Services) USDA (Department of Agriculture) VA (Department of Veterans Affairs)	$495,054	0.1%	Rank history: #62 in FY2021, #70 in FY2022, #83 in FY2023 and not on the FY2024–FY2025 lists; up 60 since Aug 2024–Jul 2025.
79	Aerospace Maintenance Solutions LLC Top agencies USAF (Department of the Air Force)	$480,396	0.1%	Rank history: not on the FY2021–FY2022 lists, #76 in FY2023, #62 in FY2024 and #60 in FY2025; down 26 since Aug 2024–Jul 2025.
80	Pacific Biosciences of California, Inc. Top agencies HHS (Department of Health and Human Services) USDA (Department of Agriculture) DHA (Defense Health Agency)	$454,906	0.1%	Rank history: #78 in FY2021, #75 in FY2022, #98 in FY2023, #94 in FY2024 and #81 in FY2025; up 11 since Aug 2024–Jul 2025.
81	Rohde & Schwarz GMBH & Co. Kommanditgesellschaft Through Rohde & Schwarz Usa, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$454,373	0.1%	Rank history: not on the FY2021 list, #100 in FY2022 and not on the FY2023–FY2025 lists; up 9 since Aug 2024–Jul 2025.
82	OTT Hydromet Corp Top agencies DOI (Department of the Interior)	$450,000	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
83	Nikon Metrology Inc 2 awardees, including Nikon Instruments Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs) Navy (Department of the Navy)	$449,251	0.1%	Rank history: not on the FY2021–FY2023 lists, #58 in FY2024 and #80 in FY2025; down 7 since Aug 2024–Jul 2025.
84	Avant Garde Scientific, Inc. Top agencies USUHS (DOD Uniformed Services University of the Health Sciences) HHS (Department of Health and Human Services) Navy (Department of the Navy)	$448,116	0.1%	Rank history: not on the FY2021–FY2024 lists and #74 in FY2025; up 38 since Aug 2024–Jul 2025.
85	Sartorius Stedim North America Inc. Top agencies HHS (Department of Health and Human Services)	$445,053	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
86	Tescan USA Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DOE (Department of Energy)	$441,856	0.1%	Rank history: not on the FY2021–FY2025 lists; up 43 since Aug 2024–Jul 2025.
87	Mesh Inc. Top agencies Navy (Department of the Navy)	$435,028	0.1%	Rank history: #56 in FY2021, #93 in FY2022, #93 in FY2023, #96 in FY2024 and #86 in FY2025; down 1 since Aug 2024–Jul 2025.
88	Hydro, Inc. Top agencies HHS (Department of Health and Human Services)	$424,278	0.1%	Rank history: not on the FY2021–FY2023 lists, #98 in FY2024 and not on the FY2025 list; up 25 since Aug 2024–Jul 2025.
89	ZEF Scientific Inc. Top agencies HHS (Department of Health and Human Services) USDA (Department of Agriculture) DOI (Department of the Interior)	$421,971	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
90	Aero International, LLC Top agencies USAF (Department of the Air Force)	$420,300	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
91	Azenta US Inc. Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy)	$419,094	0.1%	Rank history: not on the FY2021–FY2024 lists and #73 in FY2025; down 24 since Aug 2024–Jul 2025.
92	Newco Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$414,783	0.1%	Rank history: not on the FY2021–FY2024 lists and #88 in FY2025; down 5 since Aug 2024–Jul 2025.
93	State of California Department of Water Resources Top agencies DOI (Department of the Interior)	$410,000	0.1%	Rank history: not on the FY2021–FY2025 lists; down 9 since Aug 2024–Jul 2025.
94	Ta Instruments - Waters L.L.C. 2 awardees, including Environmental Resource Associates, Inc. Top agencies Commerce (Department of Commerce) Navy (Department of the Navy) Army (Department of the Army)	$407,844	0.1%	Rank history: not on the FY2021–FY2024 lists and #89 in FY2025; up 52 since Aug 2024–Jul 2025.
95	Triangle Manifold Services, Inc. Top agencies VA (Department of Veterans Affairs)	$404,721	0.1%	Rank history: not on the FY2021–FY2022 lists, #100 in FY2023 and not on the FY2024–FY2025 lists; up 58 since Aug 2024–Jul 2025.
96	Teledyne Flir Unmanned Ground Systems Inc 3 awardees, including Teledyne Flir Defense, LLC and Teledyne Instruments Inc. Top agencies Navy (Department of the Navy) DHA (Defense Health Agency) EPA (Environmental Protection Agency)	$382,729	0.1%	Rank history: #66 in FY2021, not on the FY2022–FY2023 lists, #71 in FY2024 and #79 in FY2025; up 214 since Aug 2024–Jul 2025.
97	Safepoint Scientific LLC Top agencies USDA (Department of Agriculture) VA (Department of Veterans Affairs)	$375,209	0.1%	Rank history: not on the FY2021–FY2022 lists, #91 in FY2023, #91 in FY2024 and #85 in FY2025; down 15 since Aug 2024–Jul 2025.
98	Transcat, Inc. 2 awardees Top agencies Army (Department of the Army) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$365,767	0.1%	Rank history: not on the FY2021–FY2025 lists; up 157 since Aug 2024–Jul 2025.
99	Mediso Usa, LLC Top agencies HHS (Department of Health and Human Services)	$347,635	0.1%	Rank history: not on the FY2021–FY2022 lists, #99 in FY2023 and not on the FY2024–FY2025 lists; up 9 since Aug 2024–Jul 2025.
100	Olympus America Inc. Top agencies USAF (Department of the Air Force)	$345,317	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.

How this ranking works

• Source: every contract action FPDS records (as published on SAM.gov) in the period, as GovTribe received it.
• Amounts are net obligations: what was obligated, less what was deobligated. Shares are of $398 million obligated before deobligations, so they never pass 100%.
• Parent companies: each action counts under the ultimate parent its award record names, or under the awardee when it names none, so no dollar counts twice. An awardee whose own actions mostly name no parent, and that no other company's actions name as their parent, rolls up its SAM.gov registration's chain of parent companies: it counts under the first company there that other companies' actions name as their parent, or under the parent most of a company's own actions name, whichever comes first; with neither, under the highest company in the chain with federal contracts of its own. Joint ventures stay companies of their own. Parents of the same name (Inc., LLC and the like aside) count as one company, since FPDS records a company's parent under more than one UEI over time. GovTribe corrects a few parents and names by hand; see the corrections.
• Period: the trailing 12 months end with the last month that ended at least 90 days ago, because the Department of Defense reports its contract actions to FPDS about 90 days late. The list is rebuilt each night.
• Rank changes compare with Aug 2024–Jul 2025. "New" marks a company outside that period's top 500, and "Returned" one of those that was on an earlier fiscal year's list.
• Rank lines show each company's rank on every fiscal year's list since FY2021, #1 at the top, on a scale that gives the top of the list more room. A dashed stretch spans years it wasn't on the list.
• Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

Quick answers