Top 100 Contractors in PSC 66: Instruments and Laboratory Equipment, FY2025

Name: Top 100 Contractors in PSC 66: Instruments and Laboratory Equipment, FY2025
Creator: GovTribe
License: https://creativecommons.org/licenses/by/4.0/

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

The top 10 won 23% of FY2025 PSC 66 contract dollars

Contract obligations: $3,649,065,463 Net of deobligations, by contracts coded PSC 66 or a code under it
Contractors: 3,496 Parent companies with an obligation
Largest contractor: Honeywell International Inc. $135 million, 3.5% of obligations
Data as of: Oct 23, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV · Free to reuse with credit to GovTribe (CC BY 4.0)

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Honeywell International Inc. 17 awardees Top agencies Army (Department of the Army) USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$134,571,362	3.5%	Rank history: #19 in FY2021, #11 in FY2022, #5 in FY2023 and #2 in FY2024; up 1 since FY2024.
2	Lockheed Martin Corporation 12 awardees, including Sikorsky Aircraft Corporation, Lockheed Martin Sippican, Inc. and Derco Aerospace, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) DLA (Defense Logistics Agency)	$118,785,263	3.1%	Rank history: #4 in FY2021, #5 in FY2022, #3 in FY2023 and #1 in FY2024; down 1 since FY2024.
3	Government Scientific Source Inc. Top agencies DLA (Defense Logistics Agency) Army (Department of the Army) VA (Department of Veterans Affairs)	$113,481,535	3.0%	Rank history: #15 in FY2021, #9 in FY2022, #10 in FY2023 and #5 in FY2024; up 2 since FY2024.
4	Danaher Corporation 15 awardees, including Beckman Coulter, Inc., Cepheid and Leica Microsystems Inc. Top agencies VA (Department of Veterans Affairs) DLA (Defense Logistics Agency) HHS (Department of Health and Human Services)	$103,271,033	2.7%	Rank history: #5 in FY2021, #3 in FY2022, #6 in FY2023 and #4 in FY2024; unchanged since FY2024.
5	Rapiscan Systems Inc. Top agencies DHS (Department of Homeland Security) DLA (Defense Logistics Agency) USAF (Department of the Air Force)	$74,347,473	1.9%	Rank history: not on the FY2021–FY2023 lists and #40 in FY2024; up 35 since FY2024.
6	BAE Systems 10 awardees, including BAE Systems Information and Electronic Systems Integration Inc., BAE Systems Controls Inc. and BAE Systems (Operations) Limited Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DLA (Defense Logistics Agency)	$72,036,379	1.9%	Rank history: #44 in FY2021, #10 in FY2022, #13 in FY2023 and #30 in FY2024; up 24 since FY2024.
7	Abbott Laboratories Inc. 6 awardees, including Abbott Rapid DX North America LLC and Alere San Diego, Inc. Top agencies VA (Department of Veterans Affairs) DLA (Defense Logistics Agency) HHS (Department of Health and Human Services)	$71,745,904	1.9%	Rank history: #1 in FY2021, #2 in FY2022, #16 in FY2023 and #10 in FY2024; up 3 since FY2024.
8	Thermo Fisher Scientific Inc. 12 awardees, including Life Technologies Corporation, Thermo Electron North America LLC and FEI Company Top agencies DOJ (Department of Justice) HHS (Department of Health and Human Services) USDA (Department of Agriculture)	$71,596,967	1.9%	Rank history: not on the FY2021–FY2022 lists, #51 in FY2023 and #9 in FY2024; up 1 since FY2024.
9	L3Harris Technologies, Inc. 15 awardees, including L3Harris Interstate Electronics Corporation, Acron Aviation, Inc. and Fisica Applied Technologies, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$70,380,974	1.8%	Rank history: #12 in FY2021, #7 in FY2022, #8 in FY2023 and #6 in FY2024; down 3 since FY2024.
10	RTX Corporation 26 awardees, including Rockwell Collins, Inc., Raytheon Company and Simmonds Precision Products Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$68,110,368	1.8%	Rank history: #10 in FY2021, #6 in FY2022, #2 in FY2023 and #3 in FY2024; down 7 since FY2024.
11	Northrop Grumman Systems Corporation 19 awardees Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DLA (Defense Logistics Agency)	$67,561,531	1.8%	Rank history: #11 in FY2021, #12 in FY2022, #7 in FY2023 and #8 in FY2024; down 3 since FY2024.
12	Arthrex Inc. Top agencies DLA (Defense Logistics Agency)	$64,962,400	1.7%	Rank history: not on the FY2021–FY2023 lists and #96 in FY2024; up 84 since FY2024.
13	Stryker Corporation 2 awardees, including Howmedica Osteonics Corp and Stryker Sales, LLC Top agencies DLA (Defense Logistics Agency)	$58,462,388	1.5%	Rank history: #25 in FY2021, #18 in FY2022, #21 in FY2023 and #12 in FY2024; down 1 since FY2024.
14	Smiths Detection Inc. 2 awardees Top agencies DHS (Department of Homeland Security) Army (Department of the Army) USAF (Department of the Air Force)	$58,177,543	1.5%	Rank history: not on the FY2021–FY2023 lists and #89 in FY2024; up 75 since FY2024.
15	Johnson & Johnson 2 awardees, including Johnson & Johnson Health Care Systems Inc. and Depuy Synthes Sales Inc. Top agencies DLA (Defense Logistics Agency) HHS (Department of Health and Human Services)	$52,481,562	1.4%	Rank history: #20 in FY2021, #15 in FY2022, #17 in FY2023 and #22 in FY2024; up 7 since FY2024.
16	Technical Communities, Inc. Top agencies DOT (Department of Transportation) Navy (Department of the Navy) USAF (Department of the Air Force)	$50,819,965	1.3%	Rank history: #29 in FY2021, #30 in FY2022, #28 in FY2023 and #14 in FY2024; down 2 since FY2024.
17	Leidos Holdings, Inc. 6 awardees, including Leidos, Inc. Top agencies DHS (Department of Homeland Security) DLA (Defense Logistics Agency) Navy (Department of the Navy)	$50,361,163	1.3%	Rank history: #8 in FY2021, #36 in FY2022, #27 in FY2023 and not on the FY2024 list; up 307 since FY2024.
18	Thermo Electron Corporation 7 awardees, including Fisher Scientific Company L.L.C., Thermo Eberline LLC and Life Technologies Corporation Top agencies DLA (Defense Logistics Agency) HHS (Department of Health and Human Services) Navy (Department of the Navy)	$48,690,192	1.3%	Rank history: #6 in FY2021, #8 in FY2022, #9 in FY2023 and #92 in FY2024; up 74 since FY2024.
19	D-2 Incorporated Top agencies Army (Department of the Army) Navy (Department of the Navy) DLA (Defense Logistics Agency)	$43,934,590	1.1%	Rank history: not on the FY2021–FY2023 lists and #50 in FY2024; up 31 since FY2024.
20	Canadian Commercial Corporation Top agencies Army (Department of the Army) Navy (Department of the Navy) DLA (Defense Logistics Agency)	$41,805,733	1.1%	Rank history: not on the FY2021–FY2023 lists and #20 in FY2024; unchanged since FY2024.
21	Roche Holdings Inc. Through Roche Diagnostics Corporation Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$40,956,568	1.1%	Rank history: not on the FY2021–FY2023 lists and #39 in FY2024; up 18 since FY2024.
22	Beacon Point Associates LLC Top agencies DLA (Defense Logistics Agency)	$40,426,122	1.1%	Rank history: #27 in FY2021, #23 in FY2022, #31 in FY2023 and #18 in FY2024; down 4 since FY2024.
23	Teledyne Flir Unmanned Ground Systems Inc 23 awardees, including Teledyne Flir Defense, LLC, Teledyne Instruments, Inc. and Teledyne Digital Imaging US, Inc. Top agencies Army (Department of the Army) DOI (Department of the Interior) Navy (Department of the Navy)	$34,078,305	0.9%	Rank history: #49 in FY2021, #13 in FY2022, #90 in FY2023 and #72 in FY2024; up 49 since FY2024.
24	Total Technology, Inc. Top agencies Army (Department of the Army)	$31,972,108	0.8%	Rank history: #45 in FY2021, #17 in FY2022, not on the FY2023 list and #71 in FY2024; up 47 since FY2024.
25	Dove Medical Supply LLC Top agencies DLA (Defense Logistics Agency) VA (Department of Veterans Affairs)	$28,843,343	0.8%	Rank history: #41 in FY2021, #39 in FY2022, #42 in FY2023 and #35 in FY2024; up 10 since FY2024.
26	Southwest Research Institute Top agencies NASA (National Aeronautics and Space Administration) Commerce (Department of Commerce) DLA (Defense Logistics Agency)	$28,196,116	0.7%	Rank history: #16 in FY2021, #84 in FY2022 and not on the FY2023–FY2024 lists; returned.
27	Agilent Technologies, Inc. 3 awardees Top agencies DHS (Department of Homeland Security) DOJ (Department of Justice) HHS (Department of Health and Human Services)	$25,938,703	0.7%	Rank history: not on the FY2021–FY2023 lists and #27 in FY2024; unchanged since FY2024.
28	Atlantic Diving Supply, Inc. 2 awardees, including 4 Star Technologies, Inc. Top agencies DLA (Defense Logistics Agency) DFAS (Defense Finance and Accounting Service) Army (Department of the Army)	$25,615,695	0.7%	Rank history: not on the FY2021–FY2023 lists and #52 in FY2024; up 24 since FY2024.
29	Astrophysics Inc. Top agencies DHS (Department of Homeland Security) USAF (Department of the Air Force) Treasury (Department of the Treasury)	$22,897,030	0.6%	Rank history: #21 in FY2021, not on the FY2022–FY2023 lists and #64 in FY2024; up 35 since FY2024.
30	The Boeing Company 10 awardees, including Boeing Distribution, Inc., Boeing Distribution Services, Inc. and Jeppesen Foreflight, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$22,642,814	0.6%	Rank history: #23 in FY2021, not on the FY2022 list, #15 in FY2023 and #45 in FY2024; up 15 since FY2024.
31	Fortive Corporation 3 awardees, including Fluke Electronics Corp, Thomson Linear LLC and Landauer, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Commerce (Department of Commerce)	$22,530,031	0.6%	Rank history: not on the FY2021–FY2023 lists and #33 in FY2024; up 2 since FY2024.
32	Siemens Corporation 4 awardees, including Siemens Healthcare Diagnostics Inc., Siemens Industry Inc. and Siemens Medical Solutions Usa, Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) Navy (Department of the Navy)	$22,090,176	0.6%	Rank history: not on the FY2021–FY2023 lists and #34 in FY2024; up 2 since FY2024.
33	Rosemount Aerospace Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$21,565,626	0.6%	Rank history: not on the FY2021–FY2023 lists and #66 in FY2024; up 33 since FY2024.
34	Zimmer Biomet Holdings Inc. Through Zimmer US Inc. Top agencies DLA (Defense Logistics Agency)	$21,558,007	0.6%	Rank history: not on the FY2021–FY2023 lists and #61 in FY2024; up 27 since FY2024.
35	Rev-Cap Company, Inc. Top agencies DLA (Defense Logistics Agency)	$21,305,527	0.6%	Rank history: not on the FY2021–FY2024 lists; up 350 since FY2024.
36	Ludlum Measurements, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$21,190,845	0.6%	Rank history: not on the FY2021 list, #63 in FY2022, #52 in FY2023 and #24 in FY2024; down 12 since FY2024.
37	Astronics Corporation 4 awardees, including Astronics Test Systems Inc. and Astronics Connectivity Systems & Certification Corp. Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$21,181,201	0.6%	Rank history: not on the FY2021–FY2024 lists; new.
38	Honeybee Robotics LLC Top agencies NASA (National Aeronautics and Space Administration)	$20,943,926	0.5%	Rank history: not on the FY2021–FY2024 lists; up 219 since FY2024.
39	Red One Medical Devices LLC Top agencies DLA (Defense Logistics Agency)	$19,948,384	0.5%	Rank history: not on the FY2021–FY2022 lists, #79 in FY2023 and #42 in FY2024; up 3 since FY2024.
40	Ametek Inc. 23 awardees, including Spectro Scientific, Inc., Nsi-Mi Technologies Inc. and Advanced Measurement Technology Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$17,592,098	0.5%	Rank history: #39 in FY2021, #34 in FY2022, #58 in FY2023 and not on the FY2024 list; up 103 since FY2024.
41	Illumina, Inc. 2 awardees Top agencies HHS (Department of Health and Human Services) USDA (Department of Agriculture) Navy (Department of the Navy)	$17,297,294	0.5%	Rank history: #38 in FY2021, #35 in FY2022, #36 in FY2023 and #44 in FY2024; up 3 since FY2024.
42	Boston Scientific Corp 2 awardees, including Boston Scientific Neuromodulation Corp Top agencies DLA (Defense Logistics Agency) HHS (Department of Health and Human Services)	$17,183,475	0.4%	Rank history: #69 in FY2021, #70 in FY2022, #65 in FY2023 and #54 in FY2024; up 12 since FY2024.
43	Genesis Vision, Inc. Top agencies DLA (Defense Logistics Agency)	$16,877,527	0.4%	Rank history: #66 in FY2021, #65 in FY2022, #71 in FY2023 and #70 in FY2024; up 27 since FY2024.
44	CHG Group Inc 3 awardees, including Chemring Sensors and Electronic Systems, Inc. and Chemring Energetic Devices Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$16,788,518	0.4%	Rank history: not on the FY2021–FY2022 lists, #61 in FY2023 and #41 in FY2024; down 3 since FY2024.
45	Trillamed LLC Top agencies DHA (Defense Health Agency) HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$16,647,460	0.4%	Rank history: not on the FY2021–FY2024 lists; up 164 since FY2024.
46	Sysmex America Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$16,350,058	0.4%	Rank history: not on the FY2021–FY2023 lists and #90 in FY2024; up 44 since FY2024.
47	Sustainable System Solutions LLC Top agencies Army (Department of the Army)	$16,243,720	0.4%	Rank history: #17 in FY2021, #14 in FY2022, #23 in FY2023 and #29 in FY2024; down 18 since FY2024.
48	Apiary Medical Inc. 3 awardees, including Affirmative Solutions LLC and Manus Medical, LLC Top agencies DLA (Defense Logistics Agency)	$16,064,350	0.4%	Rank history: not on the FY2021–FY2024 lists; new.
49	Alliant Enterprises, LLC Top agencies DLA (Defense Logistics Agency) VA (Department of Veterans Affairs)	$15,865,820	0.4%	Rank history: #36 in FY2021, #41 in FY2022, #49 in FY2023 and #46 in FY2024; down 3 since FY2024.
50	Franklin Young International, Incorporated Top agencies DLA (Defense Logistics Agency) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$15,090,270	0.4%	Rank history: #61 in FY2021, #50 in FY2022, #62 in FY2023 and #48 in FY2024; down 2 since FY2024.
51	Henry Schein, Inc. 3 awardees, including Peter Brasseler Holdings, Llc. and Covetrus North America, LLC Top agencies DLA (Defense Logistics Agency)	$14,396,721	0.4%	Rank history: #48 in FY2021, #56 in FY2022, #69 in FY2023 and #62 in FY2024; up 11 since FY2024.
52	Biofire Defense LLC 3 awardees, including Biomerieux Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency) Army (Department of the Army)	$14,332,730	0.4%	Rank history: not on the FY2021–FY2024 lists; up 99 since FY2024.
53	Rolls-Royce Corporation 2 awardees, including Rolls-Royce Solutions America Inc. Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$14,227,896	0.4%	Rank history: not on the FY2021–FY2024 lists; up 152 since FY2024.
54	Scitech Services Inc. Top agencies Army (Department of the Army) DFAS (Defense Finance and Accounting Service)	$14,106,310	0.4%	Rank history: not on the FY2021–FY2024 lists; new.
55	Bright Silicon Technologies, Inc. Top agencies USAF (Department of the Air Force)	$13,899,999	0.4%	Rank history: not on the FY2021–FY2024 lists; new.
56	AAR Corp. 2 awardees, including AAR Supply Chain, Inc. and AAR Government Services, Inc. Top agencies DLA (Defense Logistics Agency) Army (Department of the Army) USAF (Department of the Air Force)	$13,865,193	0.4%	Rank history: not on the FY2021–FY2024 lists; up 82 since FY2024.
57	Cedarville Engineering Group LLC Top agencies Army (Department of the Army)	$13,344,839	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
58	Ortho-Clinical Diagnostics Inc. 3 awardees, including Quidelortho Sales Company, LLC and Quidel Corp Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$12,993,650	0.3%	Rank history: not on the FY2021–FY2024 lists; up 65 since FY2024.
59	Transaero, Inc. Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force)	$12,722,520	0.3%	Rank history: #64 in FY2021, #81 in FY2022, #86 in FY2023 and #36 in FY2024; down 23 since FY2024.
60	General Electric Company 11 awardees, including GE Aviation Systems LLC, Druck, LLC and Reuter-Stokes, LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DLA (Defense Logistics Agency)	$12,020,377	0.3%	Rank history: #99 in FY2021, #51 in FY2022, #93 in FY2023 and not on the FY2024 list; up 113 since FY2024.
61	VWR International LLC 2 awardees, including Labrepco LLC Top agencies DLA (Defense Logistics Agency) HHS (Department of Health and Human Services) USDA (Department of Agriculture)	$11,921,239	0.3%	Rank history: not on the FY2021–FY2023 lists and #81 in FY2024; up 20 since FY2024.
62	Intercomp Co Top agencies USAF (Department of the Air Force) DLA (Defense Logistics Agency) Navy (Department of the Navy)	$11,684,010	0.3%	Rank history: not on the FY2021–FY2024 lists; up 256 since FY2024.
63	Era Health LLC Top agencies DLA (Defense Logistics Agency)	$11,654,071	0.3%	Rank history: not on the FY2021 list, #77 in FY2022, #75 in FY2023 and #57 in FY2024; down 6 since FY2024.
64	Parker-Hannifin Corporation 9 awardees, including Meggitt (Orange County), Inc., Meggitt Aircraft Braking Systems Corporation and Meggitt Defense Systems, Inc. Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security) USAF (Department of the Air Force)	$11,593,992	0.3%	Rank history: not on the FY2021–FY2024 lists; up 40 since FY2024.
65	Kls-Martin Limited Partnership Top agencies DLA (Defense Logistics Agency)	$11,345,023	0.3%	Rank history: not on the FY2021–FY2023 lists and #85 in FY2024; up 20 since FY2024.
66	San Antonio Lighthouse for the Blind Top agencies DLA (Defense Logistics Agency)	$11,040,241	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
67	Standard Calibrations Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) DHS (Department of Homeland Security)	$11,008,030	0.3%	Rank history: not on the FY2021–FY2023 lists and #97 in FY2024; up 30 since FY2024.
68	Bruker Scientific LLC 6 awardees, including Bruker Detection Corp, Bruker Biospin Corp and Bruker AXS LLC Top agencies Navy (Department of the Navy) HHS (Department of Health and Human Services) Commerce (Department of Commerce)	$10,737,723	0.3%	Rank history: #65 in FY2021, #74 in FY2022, #43 in FY2023 and #31 in FY2024; down 37 since FY2024.
69	Vaisala Inc. 2 awardees Top agencies Commerce (Department of Commerce) USAF (Department of the Air Force) Navy (Department of the Navy)	$10,622,637	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
70	Integrated Procurement Technologies 2 awardees Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) USAF (Department of the Air Force)	$10,458,931	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
71	Mountain Horse LLC Top agencies Army (Department of the Army) DFAS (Defense Finance and Accounting Service) USAF (Department of the Air Force)	$10,349,703	0.3%	Rank history: not on the FY2021–FY2023 lists and #19 in FY2024; down 52 since FY2024.
72	Lovell Government Services Inc. Top agencies DLA (Defense Logistics Agency)	$10,156,074	0.3%	Rank history: not on the FY2021–FY2024 lists; up 59 since FY2024.
73	Rohde & Schwarz GMBH & Co. Kommanditgesellschaft 2 awardees, including Rohde & Schwarz Usa, Inc. and Zurich Instruments AG Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Commerce (Department of Commerce)	$10,009,308	0.3%	Rank history: #58 in FY2021, #49 in FY2022, #39 in FY2023 and #58 in FY2024; down 15 since FY2024.
74	Olympus America Inc. Top agencies USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$9,753,139	0.3%	Rank history: not on the FY2021–FY2024 lists; up 70 since FY2024.
75	W S Darley & Co Top agencies DFAS (Defense Finance and Accounting Service) Army (Department of the Army)	$9,587,285	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
76	Medtronic Inc. 5 awardees, including Medtronic USA Inc., Covidien Sales LLC and Medtronic Gesellschaft MIT Beschränkter Haftung Top agencies DLA (Defense Logistics Agency) VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$9,489,015	0.2%	Rank history: not on the FY2021–FY2022 lists, #70 in FY2023 and #63 in FY2024; down 13 since FY2024.
77	Federal Resources Supply Company, LLC Top agencies DOS (Department of State) DHS (Department of Homeland Security) DLA (Defense Logistics Agency)	$9,483,956	0.2%	Rank history: not on the FY2021–FY2023 lists and #11 in FY2024; down 66 since FY2024.
78	Atap Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DLA (Defense Logistics Agency)	$9,242,442	0.2%	Rank history: not on the FY2021–FY2024 lists; up 51 since FY2024.
79	OTT Hydromet Corp Top agencies DOI (Department of the Interior) USDA (Department of Agriculture) Commerce (Department of Commerce)	$8,910,516	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
80	Emerson Electric Co 4 awardees, including National Instruments Corp, Rosemount Specialty Products LLC and Flexim Americas Corporation Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$8,884,858	0.2%	Rank history: not on the FY2021–FY2023 lists and #25 in FY2024; down 55 since FY2024.
81	Benco Dental Supply Co. Top agencies DLA (Defense Logistics Agency)	$8,843,834	0.2%	Rank history: #81 in FY2021, #68 in FY2022, #82 in FY2023 and #76 in FY2024; down 5 since FY2024.
82	Keysight Technologies, Inc. 2 awardees, including Spirent Federal Systems Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$8,720,663	0.2%	Rank history: #70 in FY2021, #59 in FY2022, #35 in FY2023 and #38 in FY2024; down 44 since FY2024.
83	Biomerieux Inc. Top agencies VA (Department of Veterans Affairs) USDA (Department of Agriculture) DHA (Defense Health Agency)	$7,932,640	0.2%	Rank history: not on the FY2021–FY2024 lists; up 357 since FY2024.
84	Berkshire Hathaway Inc. 4 awardees, including Kitco Fiber Optics Inc., Frasca International, Inc. and Tti, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) DOT (Department of Transportation)	$7,870,864	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
85	Buffalo Supply Inc. Top agencies DLA (Defense Logistics Agency)	$7,809,439	0.2%	Rank history: not on the FY2021 list, #88 in FY2022, #100 in FY2023 and #80 in FY2024; down 5 since FY2024.
86	Indal Technologies Inc 3 awardees, including Curtiss-Wright DS, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$7,770,077	0.2%	Rank history: not on the FY2021–FY2023 lists and #93 in FY2024; up 7 since FY2024.
87	Veterans Healthcare Supply Solutions, Inc. Top agencies DLA (Defense Logistics Agency) VA (Department of Veterans Affairs)	$7,693,821	0.2%	Rank history: not on the FY2021–FY2024 lists; up 275 since FY2024.
88	Dental Health Products Incorporated Top agencies DLA (Defense Logistics Agency)	$7,550,648	0.2%	Rank history: #75 in FY2021, #85 in FY2022, #91 in FY2023 and #78 in FY2024; down 10 since FY2024.
89	The Charles Stark Draper Laboratory, Inc. Top agencies Navy (Department of the Navy)	$7,381,937	0.2%	Rank history: not on the FY2021–FY2024 lists; up 16 since FY2024.
90	NDT Solutions, LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$7,289,402	0.2%	Rank history: not on the FY2021–FY2023 lists and #75 in FY2024; down 15 since FY2024.
91	GTA Containers, LLC Top agencies Army (Department of the Army)	$7,260,231	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
92	Werfen USA LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$7,247,840	0.2%	Rank history: not on the FY2021–FY2024 lists; up 154 since FY2024.
93	Kampi Components Co Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$6,995,196	0.2%	Rank history: #96 in FY2021 and not on the FY2022–FY2024 lists; up 27 since FY2024.
94	Kitco LLC Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) USAF (Department of the Air Force)	$6,982,731	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
95	Heico Corp 11 awardees, including Pioneer Industries, LLC, Inertial Airline Services Inc. and Seal Dynamics LLC Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) Commerce (Department of Commerce)	$6,859,706	0.2%	Rank history: not on the FY2021–FY2024 lists; up 122 since FY2024.
96	Thomas Scientific, LLC Top agencies DLA (Defense Logistics Agency) VA (Department of Veterans Affairs) DOJ (Department of Justice)	$6,838,993	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
97	Jamaica Bearings Co., Inc. Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force) DHS (Department of Homeland Security)	$6,764,422	0.2%	Rank history: not on the FY2021–FY2024 lists; up 36 since FY2024.
98	Rhinestahl Corporation Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$6,743,774	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
99	Onto Innovation Inc. 2 awardees, including Nanometrics Inc. and 4 D Technology Corporation Top agencies DOI (Department of the Interior) USAF (Department of the Air Force) Navy (Department of the Navy)	$6,717,908	0.2%	Rank history: not on the FY2021 list, #99 in FY2022 and not on the FY2023–FY2024 lists; up 42 since FY2024.
100	V.j. Technologies, Inc. Top agencies Army (Department of the Army)	$6,480,515	0.2%	Rank history: not on the FY2021–FY2024 lists; up 255 since FY2024.

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100 of 3,496 contractors listed here. See the rest on GovTribe.

Rankings for the codes under PSC 66

Code	Net obligations	Largest contractor
6640 Laboratory Equipment and Supplies	$1,332,771,671	Government Scientific Source Inc.
6625 Electrical and Electronic Properties Measuring and Testing Instruments	$453,369,878	Lockheed Martin Corporation
6605 Navigational Instruments	$343,201,521	Honeywell International Inc.
6665 Hazard-Detecting Instruments and Apparatus	$330,382,834	Rapiscan Systems Inc.
6630 Chemical Analysis Instruments	$212,962,568	D-2 Incorporated
6610 Flight Instruments	$154,416,923	Southwest Research Institute
6685 Pressure, Temperature, and Humidity Measuring and Controlling Instruments	$141,909,267	Rolls-Royce Corporation
6650 Optical Instruments, Test Equipment, Components and Accessories	$128,873,832	RTX Corporation
6695 Combination and Miscellaneous Instruments	$124,453,917	Sustainable System Solutions LLC
6680 Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments	$113,962,576	Standard Calibrations Inc.
6635 Physical Properties Testing and Inspection	$68,419,273	NDT Solutions, LLC
6615 Automatic Pilot Mechanisms and Airborne Gyro Components	$67,983,487	Canadian Commercial Corporation
6620 Engine Instruments	$47,135,694	Honeywell International Inc.
6660 Meteorological Instruments and Apparatus	$42,357,626	Vaisala Inc.
6636 Environmental Chambers and Related Equipment	$17,574,767	Cedarville Engineering Group LLC
6655 Geophysical Instruments	$16,491,658	Onto Innovation Inc.
6675 Drafting, Surveying, and Mapping Instruments	$14,920,920	Red Canyon Perikin JV, LLC
6670 Scales and Balances	$14,370,826	Intercomp Co
6632 Analysis Instruments, Medical Laboratory Use	$12,963,867	Sysmex America Inc.
6645 Time Measuring Instruments	$10,542,361	Marathon Watch Company Ltd

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 $3.83 billion 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.
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 PSC 66 contractors in FY2025?

1. Honeywell International Inc. ($135M), 2. Lockheed Martin Corporation ($119M), 3. Government Scientific Source Inc. ($113M), 4. Danaher Corporation ($103M), 5. Rapiscan Systems Inc. ($74.3M), 6. BAE Systems ($72M), 7. Abbott Laboratories Inc. ($71.7M), 8. Thermo Fisher Scientific Inc. ($71.6M), 9. L3Harris Technologies, Inc. ($70.4M), 10. RTX Corporation ($68.1M).

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