Top 100 Contractors in PSC 6650: Optical Instruments, Test Equipment, Components and Accessories, FY2023

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Ihealth Labs Inc. Top agencies HHS (Department of Health and Human Services)	$166,950,000	24.8%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
2	Barupon LLC Top agencies HHS (Department of Health and Human Services)	$86,400,000	12.8%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
3	Azure Medical, Inc. Top agencies HHS (Department of Health and Human Services)	$61,236,000	9.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
4	Maxim Biomedical, Inc. Top agencies HHS (Department of Health and Human Services)	$49,536,000	7.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
5	L3Harris Technologies, Inc. 4 awardees, including L3 Technologies, Inc. and Harris Corporation Top agencies NASA (National Aeronautics and Space Administration) USSOCOM (United States Special Operations Command) DLA (Defense Logistics Agency)	$45,373,191	6.7%	Rank history: #1 in FY2021, #1 in FY2022, #2 in FY2024 and #10 in FY2025; down 4 since FY2022.
6	Kwell Laboratories Inc. Top agencies HHS (Department of Health and Human Services)	$31,384,584	4.7%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
7	Princeton Biomeditech Corp Top agencies HHS (Department of Health and Human Services)	$28,728,000	4.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
8	Quidel Corp Top agencies HHS (Department of Health and Human Services)	$28,620,000	4.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
9	Inbios International Inc. Top agencies HHS (Department of Health and Human Services)	$20,736,000	3.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
10	Sekisui America Corporation Through Sekisui Diagnostics, LLC Top agencies HHS (Department of Health and Human Services)	$20,520,000	3.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
11	RTX Corporation 4 awardees, including Hamilton Sundstrand Corporation, Raytheon Company and Rockwell Collins, Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$7,787,379	1.2%	Rank history: #5 in FY2021, #17 in FY2022 and not on the FY2024–FY2025 lists; up 6 since FY2022.
12	Kitco Fiber Optics Inc Top agencies Navy (Department of the Navy) Army (Department of the Army)	$7,005,412	1.0%	Rank history: not on the FY2021 list, #54 in FY2022, #4 in FY2024 and not on the FY2025 list; up 42 since FY2022.
13	Spectrum Associates Inc. Top agencies Army (Department of the Army)	$6,692,480	1.0%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
14	Flir Systems Inc. 6 awardees, including Teledyne Flir Defense, Inc., Flir Unmanned Aerial Systems AS and Teledyne Flir Commercial Systems, Inc. Top agencies Army (Department of the Army) DOT (Department of Transportation) Navy (Department of the Navy)	$5,588,351	0.8%	Rank history: #45 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 157 since FY2022.
15	Atap Inc. Top agencies Navy (Department of the Navy)	$5,157,238	0.8%	Rank history: not on the FY2021 list, #4 in FY2022, #10 in FY2024 and #9 in FY2025; down 11 since FY2022.
16	Optex Systems Inc. 2 awardees Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$4,863,918	0.7%	Rank history: #8 in FY2021, #6 in FY2022, #6 in FY2024 and #11 in FY2025; down 10 since FY2022.
17	Waygate Technologies USA LP Top agencies Army (Department of the Army) USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$4,767,455	0.7%	Rank history: #7 in FY2021, #2 in FY2022, #7 in FY2024 and not on the FY2025 list; down 15 since FY2022.
18	Ametek Inc. 8 awardees, including Spectro Scientific, Inc., Zygo Corporation and Vision Research, Inc. Top agencies Navy (Department of the Navy) DOJ (Department of Justice) USUHS (DOD Uniformed Services University of the Health Sciences)	$4,760,037	0.7%	Rank history: #2 in FY2021, #3 in FY2022, #19 in FY2024 and #5 in FY2025; down 15 since FY2022.
19	Genabio Diagnostics Inc. Top agencies HHS (Department of Health and Human Services)	$4,500,000	0.7%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
20	BNC Corp. Top agencies DTRA (Defense Threat Reduction Agency) Navy (Department of the Navy)	$3,748,500	0.6%	Rank history: not on the FY2021 list, #40 in FY2022, #35 in FY2024 and #64 in FY2025; up 20 since FY2022.
21	Danaher Corporation 7 awardees, including Leica Microsystems Inc., Beckman Coulter, Inc. and Cepheid Top agencies HHS (Department of Health and Human Services) DHA (Defense Health Agency) DOI (Department of the Interior)	$3,537,159	0.5%	Rank history: #22 in FY2021, #16 in FY2022, #16 in FY2024 and #37 in FY2025; down 5 since FY2022.
22	Teledyne Technologies Incorporated 3 awardees, including Teledyne Instruments, Inc. and Teledyne Digital Imaging US, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$2,341,777	0.3%	Rank history: not on the FY2021 list, #19 in FY2022 and not on the FY2024–FY2025 lists; down 3 since FY2022.
23	Stryker Corporation Through Stryker Sales, LLC Top agencies VA (Department of Veterans Affairs)	$2,284,142	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
24	Gastops Ltd. Top agencies USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$2,233,467	0.3%	Rank history: #6 in FY2021, #13 in FY2022, #14 in FY2024 and #8 in FY2025; down 11 since FY2022.
25	Nikon Americas Inc. 2 awardees, including Nikon Instruments Inc. and Nikon Metrology, LLC Top agencies VA (Department of Veterans Affairs) NASA (National Aeronautics and Space Administration) USDA (Department of Agriculture)	$1,951,260	0.3%	Rank history: not on the FY2021–FY2022 lists, #51 in FY2024 and #13 in FY2025; new.
26	Pssc Holding Co. Through BEI Precision Systems & Space Company, Inc. Top agencies Commerce (Department of Commerce)	$1,850,990	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
27	Nikon Corporation 2 awardees, including Nikon Instruments Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) USDA (Department of Agriculture)	$1,488,495	0.2%	Rank history: #12 in FY2021, #7 in FY2022 and not on the FY2024–FY2025 lists; down 20 since FY2022.
28	State of Arizona Through University of Arizona Top agencies Smithsonian (Smithsonian Institution)	$1,456,652	0.2%	Rank history: #21 in FY2021, #23 in FY2022 and not on the FY2024–FY2025 lists; down 5 since FY2022.
29	Tempo Communications, Inc. Top agencies Navy (Department of the Navy)	$1,210,403	0.2%	Rank history: #31 in FY2021, not on the FY2022 list, not on the FY2024 list and #71 in FY2025; up 282 since FY2022.
30	Lockheed Martin Corporation Top agencies Commerce (Department of Commerce)	$1,200,000	0.2%	Rank history: #3 in FY2021, not on the FY2022 list, #1 in FY2024 and #57 in FY2025; returned.
31	Hitachi, Ltd. Through Hitachi High-Tech America, Inc. Top agencies DOI (Department of the Interior) Navy (Department of the Navy) Treasury (Department of the Treasury)	$1,140,704	0.2%	Rank history: #26 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
32	Theodor Wille Intertrade GMBH Through Atlantic Diving Supply, Inc. Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$1,137,724	0.2%	Rank history: #97 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
33	Zistos Corporation Top agencies DLA (Defense Logistics Agency)	$1,064,991	0.2%	Rank history: #20 in FY2021, #12 in FY2022, #21 in FY2024 and not on the FY2025 list; down 21 since FY2022.
34	Technical Communities Inc Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$866,388	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 89 since FY2022.
35	Noble Supply & Logistics LLC Top agencies DLA (Defense Logistics Agency) Army (Department of the Army)	$754,057	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
36	PPD Development LP 3 awardees, including Thermo Scientific Portable Analytical Instruments Inc. and FEI Company Top agencies Army (Department of the Army) Navy (Department of the Navy)	$748,999	0.1%	Rank history: not on the FY2021–FY2022 lists, #43 in FY2024 and #48 in FY2025; new.
37	Illinois Tool Works Inc. Top agencies USAF (Department of the Air Force)	$744,983	0.1%	Rank history: not on the FY2021 list, #69 in FY2022, #97 in FY2024 and not on the FY2025 list; up 32 since FY2022.
38	Roche Holding AG Through Roche Diagnostics Corporation Top agencies DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$727,574	0.1%	Rank history: #33 in FY2021, #26 in FY2022, #29 in FY2024 and not on the FY2025 list; down 12 since FY2022.
39	Heico Aerospace Corporat 3 awardees, including Santa Barbara Infrared, Inc. and Research Electronics International, L.L.C. Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$726,530	0.1%	Rank history: not on the FY2021 list, #11 in FY2022 and not on the FY2024–FY2025 lists; down 28 since FY2022.
40	Keysight Technologies, Inc. Top agencies USAF (Department of the Air Force)	$711,390	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
41	Keyence Corporation Through Keyence Corporation of America Top agencies Navy (Department of the Navy) Army (Department of the Army) USDA (Department of Agriculture)	$635,018	0.1%	Rank history: not on the FY2021–FY2022 lists, #62 in FY2024 and not on the FY2025 list; new.
42	JDS Uniphase Corporation Through Optical Coating Laboratory, LLC Top agencies DLA (Defense Logistics Agency)	$586,830	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 231 since FY2022.
43	The Boeing Company Top agencies Army (Department of the Army)	$581,041	0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #27 in FY2025; new.
44	Specialised Imaging Incorporated Top agencies Navy (Department of the Navy)	$576,179	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
45	Toptica Photonics AG Top agencies Army (Department of the Army)	$547,929	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
46	Pelican Sales Inc. Top agencies DHS (Department of Homeland Security)	$503,942	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
47	E.r. Precision Optical Corp. Top agencies DLA (Defense Logistics Agency)	$494,333	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 145 since FY2022.
48	Eales Electronics Corp Top agencies Commerce (Department of Commerce)	$469,154	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
49	Fotronic Corporation Top agencies USAF (Department of the Air Force) Army (Department of the Army) DOT (Department of Transportation)	$466,912	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 54 since FY2022.
50	Thermo Electron Corporation 7 awardees, including Life Technologies Corporation, Fisher Scientific Company L.L.C. and FEI Company Top agencies Navy (Department of the Navy) HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$462,274	0.1%	Rank history: #11 in FY2021, #38 in FY2022 and not on the FY2024–FY2025 lists; down 12 since FY2022.
51	Thorlabs Inc. 2 awardees Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) Navy (Department of the Navy)	$457,792	0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #39 in FY2025; up 274 since FY2022.
52	Carson Industries, Inc. Top agencies DLA (Defense Logistics Agency)	$440,961	0.1%	Rank history: #39 in FY2021, #22 in FY2022, #22 in FY2024 and #28 in FY2025; down 30 since FY2022.
53	GFS Supply & Services Company, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army)	$429,856	0.1%	Rank history: #74 in FY2021, not on the FY2022 list, #24 in FY2024 and not on the FY2025 list; up 102 since FY2022.
54	Wisecom Technologies Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration)	$422,517	0.1%	Rank history: not on the FY2021 list, #39 in FY2022 and not on the FY2024–FY2025 lists; down 15 since FY2022.
55	Stephen Paul Mangum Top agencies DCSA (Defense Counterintelligence and Security Agency)	$404,475	0.1%	Rank history: #54 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
56	Leonardo S.p.A. Through DRS Network & Imaging Systems LLC Top agencies USSOCOM (United States Special Operations Command)	$394,939	0.1%	Rank history: #52 in FY2021, #33 in FY2022, #46 in FY2024 and #50 in FY2025; down 23 since FY2022.
57	Nortekusa, Inc. Top agencies Commerce (Department of Commerce)	$378,032	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
58	M Squared Lasers Inc Top agencies USAF (Department of the Air Force)	$365,183	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
59	Carl Zeiss X-RAY Microscopy Inc. Through Carl Zeiss Microscopy, LLC Top agencies HHS (Department of Health and Human Services) DHA (Defense Health Agency) USUHS (DOD Uniformed Services University of the Health Sciences)	$364,337	0.1%	Rank history: not on the FY2021 list, #5 in FY2022, #53 in FY2024 and #98 in FY2025; down 54 since FY2022.
60	I. Miller Precision Optical Instruments, Inc. Top agencies DOJ (Department of Justice) USUHS (DOD Uniformed Services University of the Health Sciences) Smithsonian (Smithsonian Institution)	$353,818	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
61	L-1 Standards and Technology, Inc. Top agencies NASA (National Aeronautics and Space Administration)	$353,187	0.1%	Rank history: #50 in FY2021, #46 in FY2022 and not on the FY2024–FY2025 lists; down 15 since FY2022.
62	BIO - RAD Laboratories Gesellschaft MIT Beschraenkter Haftung 2 awardees, including Bio-Rad Laboratories, Inc. Top agencies VA (Department of Veterans Affairs)	$341,004	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 191 since FY2022.
63	Melling LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$328,806	<0.1%	Rank history: #13 in FY2021, #60 in FY2022, #95 in FY2024 and not on the FY2025 list; down 3 since FY2022.
64	Sellers Optical, Inc. Top agencies Navy (Department of the Navy)	$316,075	<0.1%	Rank history: #77 in FY2021, #55 in FY2022, not on the FY2024 list and #68 in FY2025; down 9 since FY2022.
65	Government Scientific Source Inc. Top agencies DOI (Department of the Interior) DOL (Department of Labor) Navy (Department of the Navy)	$312,476	<0.1%	Rank history: #23 in FY2021, #24 in FY2022, #20 in FY2024 and not on the FY2025 list; down 41 since FY2022.
66	Jeol Ltd. Through Jeol Usa, Inc. Top agencies Navy (Department of the Navy) Treasury (Department of the Treasury) USAF (Department of the Air Force)	$301,753	<0.1%	Rank history: #4 in FY2021, #18 in FY2022, #30 in FY2024 and not on the FY2025 list; down 48 since FY2022.
67	Nordson Corp Through Nordson Test and Inspection Americas, Inc. Top agencies Treasury (Department of the Treasury)	$299,937	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
68	Aimpoint Inc. Top agencies DLA (Defense Logistics Agency)	$298,327	<0.1%	Rank history: not on the FY2021–FY2022 lists, #58 in FY2024 and not on the FY2025 list; new.
69	Printersys LLC Top agencies USDA (Department of Agriculture)	$279,123	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
70	Linsun Industrial Group LLC Top agencies DLA (Defense Logistics Agency)	$277,359	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 151 since FY2022.
71	Trilion Quality Systems LLC Top agencies DOI (Department of the Interior)	$257,000	<0.1%	Rank history: not on the FY2021 list, #90 in FY2022 and not on the FY2024–FY2025 lists; up 19 since FY2022.
72	Optotune Holding AG Through Optotune Switzerland AG Top agencies NASA (National Aeronautics and Space Administration)	$256,704	<0.1%	Rank history: not on the FY2021–FY2022 lists, #89 in FY2024 and not on the FY2025 list; new.
73	Coherent Inc. 2 awardees, including Coherent NA, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$254,285	<0.1%	Rank history: not on the FY2021 list, #41 in FY2022, #59 in FY2024 and not on the FY2025 list; down 32 since FY2022.
74	IPG Photonics Corporation Top agencies Army (Department of the Army)	$249,719	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
75	Scientifica LLC Through Armfield Incorporated Top agencies USAF (Department of the Air Force)	$249,419	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 72 since FY2022.
76	Hubner Photonics Inc. Top agencies Army (Department of the Army)	$248,522	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 80 since FY2022.
77	Quantifi Photonics Usa, Inc. Top agencies Army (Department of the Army)	$244,573	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
78	H.i.g. Capital Management Inc. Through Iron Bow Technologies, LLC Top agencies VA (Department of Veterans Affairs)	$238,328	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
79	Angstrom Sun Technologies Inc. Top agencies Army (Department of the Army)	$233,300	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
80	Agilent Technologies Inc. Top agencies DHS (Department of Homeland Security)	$231,159	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
81	Irsweep AG Top agencies USAF (Department of the Air Force)	$230,034	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
82	SGK Global Services LLC Top agencies DHS (Department of Homeland Security)	$224,334	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
83	Quality Vision International Inc. Top agencies Army (Department of the Army)	$223,425	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
84	PLX Inc. Top agencies Navy (Department of the Navy)	$222,578	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 73 since FY2022.
85	Seventh Genius LLC Top agencies Army (Department of the Army)	$216,998	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 153 since FY2022.
86	International Television Corp Top agencies DOJ (Department of Justice) USAF (Department of the Air Force) Army (Department of the Army)	$215,985	<0.1%	Rank history: not on the FY2021–FY2022 lists, #88 in FY2024 and not on the FY2025 list; new.
87	Scientific Sales, Inc. Top agencies DHS (Department of Homeland Security)	$206,595	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
88	Alliant Enterprises, LLC Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy) DLA (Defense Logistics Agency)	$205,851	<0.1%	Rank history: #35 in FY2021, #21 in FY2022, #26 in FY2024 and not on the FY2025 list; down 67 since FY2022.
89	Enterprise Technology Solutions, Inc. Top agencies Navy (Department of the Navy)	$205,475	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 43 since FY2022.
90	Naturalpoint Inc. Top agencies Commerce (Department of Commerce)	$204,846	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 32 since FY2022.
91	Dutch Valley Supply Co. Top agencies Navy (Department of the Navy)	$190,220	<0.1%	Rank history: not on the FY2021 list, #70 in FY2022, #83 in FY2024 and #30 in FY2025; down 21 since FY2022.
92	Trutag Technologies, Inc. Top agencies USDA (Department of Agriculture)	$189,390	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
93	Techcomp USA Inc. Top agencies USAF (Department of the Air Force)	$187,780	<0.1%	Rank history: not on the FY2021–FY2022 lists, #40 in FY2024 and not on the FY2025 list; new.
94	Wabtec Inspection Technologies, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) DLA (Defense Logistics Agency)	$185,352	<0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #20 in FY2025; new.
95	O R Elder Inc. Top agencies Navy (Department of the Navy)	$183,489	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
96	Wildlife Dominion Management, LLC Top agencies USAF (Department of the Air Force)	$180,965	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
97	Spectris PLC Through Malvern Panalytical Inc. Top agencies NASA (National Aeronautics and Space Administration) USDA (Department of Agriculture)	$180,802	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
98	Unchained Labs, LLC Top agencies HHS (Department of Health and Human Services)	$178,260	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
99	Light Conversion-Usa, Inc. Top agencies Navy (Department of the Navy)	$176,450	<0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #76 in FY2025; new.
100	Seiler Instrument and Manufacturing Company, Incorporated Top agencies DLA (Defense Logistics Agency)	$173,972	<0.1%	Rank history: not on the FY2021 list, #45 in FY2022, #23 in FY2024 and #19 in FY2025; down 55 since FY2022.

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 $673 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 2023 ran Oct 1, 2022 – Sep 30, 2023. 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 FY2022. "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 FY2022 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