Top 100 Contractors in PSC 6650: Optical Instruments, Test Equipment, Components and Accessories, FY2021

Name: Top 100 Contractors in PSC 6650: Optical Instruments, Test Equipment, Components and Accessories, FY2021
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2020 – Sep 30, 2021 Code page on GovTribe

The top 10 won 62% of FY2021 PSC 6650 contract dollars

Contract obligations: $165,379,461 Net of deobligations, by contracts coded PSC 6650
Contractors: 442 Parent companies with an obligation
Largest contractor: L3Harris Technologies, Inc. $62.1 million, 36.5% 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	L3Harris Technologies, Inc. 4 awardees, including L3 Technologies, Inc. and Harris Corporation Top agencies NASA (National Aeronautics and Space Administration) DLA (Defense Logistics Agency) Navy (Department of the Navy)	$62,061,103	36.5%	Rank history: #1 in FY2022, #5 in FY2023, #2 in FY2024 and #10 in FY2025; unchanged since FY2020.
2	Ametek Inc. 5 awardees, including Spectro Scientific, Inc., Zygo Corporation and Edax, LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$18,298,076	10.8%	Rank history: #3 in FY2022, #18 in FY2023, #19 in FY2024 and #5 in FY2025; up 6 since FY2020.
3	Lockheed Martin Corporation Top agencies Commerce (Department of Commerce)	$5,199,000	3.1%	Rank history: not on the FY2022 list, #30 in FY2023, #1 in FY2024 and #57 in FY2025; down 1 since FY2020.
4	Jeol Ltd. Through Jeol Usa, Inc. Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force) Army (Department of the Army)	$3,559,250	2.1%	Rank history: #18 in FY2022, #66 in FY2023, #30 in FY2024 and not on the FY2025 list; up 223 since FY2020.
5	RTX Corporation 10 awardees, including Hamilton Sundstrand Corporation, Raytheon Company and Rockwell Collins, Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$3,201,464	1.9%	Rank history: #17 in FY2022, #11 in FY2023 and not on the FY2024–FY2025 lists; up 8 since FY2020.
6	Gastops Ltd. Top agencies USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$3,139,681	1.8%	Rank history: #13 in FY2022, #24 in FY2023, #14 in FY2024 and #8 in FY2025; up 8 since FY2020.
7	Waygate Technologies USA LP Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$2,998,793	1.8%	Rank history: #2 in FY2022, #17 in FY2023, #7 in FY2024 and not on the FY2025 list; up 19 since FY2020.
8	Optex Systems Inc. 2 awardees Top agencies DLA (Defense Logistics Agency) Army (Department of the Army) Navy (Department of the Navy)	$2,637,360	1.6%	Rank history: #6 in FY2022, #16 in FY2023, #6 in FY2024 and #11 in FY2025; up 45 since FY2020.
9	Telops Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$2,294,630	1.4%	Rank history: not on the FY2022–FY2023 lists, #78 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
10	Federal Resources Supply Company 2 awardees Top agencies DHS (Department of Homeland Security) DLA (Defense Logistics Agency)	$2,210,102	1.3%	Rank history: #9 in FY2022, not on the FY2023 list, #60 in FY2024 and not on the FY2025 list; down 7 since FY2020.
11	Thermo Electron Corporation 6 awardees, including FEI Company, Fisher Scientific Company L.L.C. and Thermo Electron North America LLC Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security) HHS (Department of Health and Human Services)	$2,169,533	1.3%	Rank history: #38 in FY2022, #50 in FY2023 and not on the FY2024–FY2025 lists; up 18 since FY2020.
12	Nikon Corporation 2 awardees, including Nikon Instruments Inc. and Nikon Metrology, LLC Top agencies VA (Department of Veterans Affairs) DLA (Defense Logistics Agency) EPA (Environmental Protection Agency)	$2,149,985	1.3%	Rank history: #7 in FY2022, #27 in FY2023 and not on the FY2024–FY2025 lists; down 3 since FY2020.
13	Melling LLC Top agencies VA (Department of Veterans Affairs) Army (Department of the Army)	$2,137,952	1.3%	Rank history: #60 in FY2022, #63 in FY2023, #95 in FY2024 and not on the FY2025 list; up 113 since FY2020.
14	Chickasaw Health Consulting, LLC Top agencies PBGC (Pension Benefit Guaranty Corporation)	$2,028,168	1.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
15	OSI Systems Inc. Through American Science & Engineering Inc. Top agencies DHS (Department of Homeland Security)	$1,999,658	1.2%	Rank history: #27 in FY2022 and not on the FY2023–FY2025 lists; up 4 since FY2020.
16	Olympus America Inc 3 awardees Top agencies HHS (Department of Health and Human Services) DHA (Defense Health Agency) USAF (Department of the Air Force)	$1,916,204	1.1%	Rank history: #14 in FY2022, not on the FY2023 list, #3 in FY2024 and #3 in FY2025; up 33 since FY2020.
17	Superior Optical Labs, Inc. Top agencies VA (Department of Veterans Affairs)	$1,830,287	1.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
18	Elbit Systems Ltd 3 awardees, including Elbitamerica, Inc. and Elbit Systems of America - Night Vision LLC Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$1,771,636	1.0%	Rank history: not on the FY2022–FY2025 lists; up 156 since FY2020.
19	Eotech, LLC Top agencies Army (Department of the Army)	$1,496,412	0.9%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
20	Zistos Corporation Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$1,371,985	0.8%	Rank history: #12 in FY2022, #33 in FY2023, #21 in FY2024 and not on the FY2025 list; down 9 since FY2020.
21	State of Arizona Through University of Arizona Top agencies Smithsonian (Smithsonian Institution)	$1,175,773	0.7%	Rank history: #23 in FY2022, #28 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
22	Danaher Corporation 3 awardees, including Beckman Coulter, Inc. and Leica Microsystems Inc. Top agencies Army (Department of the Army) HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$1,172,231	0.7%	Rank history: #16 in FY2022, #21 in FY2023, #16 in FY2024 and #37 in FY2025; up 1 since FY2020.
23	Government Scientific Source Inc. Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency) NTSB (National Transportation Safety Board)	$1,011,586	0.6%	Rank history: #24 in FY2022, #65 in FY2023, #20 in FY2024 and not on the FY2025 list; up 11 since FY2020.
24	Carl Zeiss, Inc. Top agencies USAF (Department of the Air Force)	$999,289	0.6%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
25	Kitco Fiber Optics Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$989,371	0.6%	Rank history: not on the FY2022–FY2023 lists, #4 in FY2024 and not on the FY2025 list; down 10 since FY2020.
26	Hitachi, Ltd. Through Hitachi High-Tech America, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) Treasury (Department of the Treasury)	$849,994	0.5%	Rank history: not on the FY2022 list, #31 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
27	Leidos Holdings, Inc. Through Leidos Inc. Top agencies DHS (Department of Homeland Security)	$845,000	0.5%	Rank history: #10 in FY2022 and not on the FY2023–FY2025 lists; up 25 since FY2020.
28	Global Technology Integrators LLC Top agencies USAF (Department of the Air Force)	$790,399	0.5%	Rank history: #42 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
29	Leidos Inc. Top agencies DHS (Department of Homeland Security)	$775,000	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
30	Bruker Corporation 2 awardees, including Bruker AXS LLC and Bruker Scientific LLC Top agencies Navy (Department of the Navy) NASA (National Aeronautics and Space Administration)	$761,463	0.4%	Rank history: #44 in FY2022 and not on the FY2023–FY2025 lists; up 62 since FY2020.
31	Tempo Communications, Inc. Top agencies Navy (Department of the Navy)	$744,476	0.4%	Rank history: not on the FY2022 list, #29 in FY2023, not on the FY2024 list and #71 in FY2025; up 71 since FY2020.
32	Picoquant Photonics North America Inc. Top agencies Navy (Department of the Navy)	$729,754	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
33	Roche Holding AG 2 awardees, including Roche Diagnostics Corporation Top agencies DHA (Defense Health Agency)	$711,801	0.4%	Rank history: #26 in FY2022, #38 in FY2023, #29 in FY2024 and not on the FY2025 list; up 362 since FY2020.
34	Keyence Corp. Through Keyence Corporation of America Top agencies Army (Department of the Army) Navy (Department of the Navy) HHS (Department of Health and Human Services)	$705,745	0.4%	Rank history: #31 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
35	Alliant Enterprises, LLC Top agencies Navy (Department of the Navy) VA (Department of Veterans Affairs) DOI (Department of the Interior)	$694,254	0.4%	Rank history: #21 in FY2022, #88 in FY2023, #26 in FY2024 and not on the FY2025 list; down 18 since FY2020.
36	E.a.s. Manufacturing Co., Inc. Top agencies Navy (Department of the Navy)	$693,703	0.4%	Rank history: not on the FY2022–FY2023 lists, #67 in FY2024 and not on the FY2025 list; down 6 since FY2020.
37	L1 Enterprises Incorporated Top agencies VA (Department of Veterans Affairs)	$603,525	0.4%	Rank history: not on the FY2022–FY2025 lists; up 46 since FY2020.
38	Microbrightfield, LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$569,289	0.3%	Rank history: not on the FY2022–FY2025 lists; up 109 since FY2020.
39	Carson Industries, Inc. Top agencies DLA (Defense Logistics Agency)	$512,973	0.3%	Rank history: #22 in FY2022, #52 in FY2023, #22 in FY2024 and #28 in FY2025; down 15 since FY2020.
40	Kampi Components Co Inc. Top agencies DLA (Defense Logistics Agency)	$482,236	0.3%	Rank history: #88 in FY2022 and not on the FY2023–FY2025 lists; up 47 since FY2020.
41	Transdigm Group Incorporated Through Treality SVS LLC Top agencies USAF (Department of the Air Force)	$416,381	0.2%	Rank history: not on the FY2022–FY2025 lists; up 373 since FY2020.
42	Polytec Gesellschaft FUR Analysen- MES- & Regel-Technik MBH Through Polytec, Inc. Top agencies USAF (Department of the Air Force)	$408,800	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
43	PGS Group AB Through Aimpoint Inc. Top agencies DLA (Defense Logistics Agency)	$404,987	0.2%	Rank history: #28 in FY2022 and not on the FY2023–FY2025 lists; down 8 since FY2020.
44	Humanetics Innovative Solutions Inc. Top agencies DOT (Department of Transportation)	$399,626	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
45	Flir Systems Inc. 2 awardees, including Teledyne Flir Commercial Systems Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$398,469	0.2%	Rank history: not on the FY2022 list, #14 in FY2023 and not on the FY2024–FY2025 lists; down 35 since FY2020.
46	New TECH Solutions, Inc. Top agencies DMEA (Defense Microelectronics Activity)	$397,050	0.2%	Rank history: not on the FY2022–FY2024 lists and #53 in FY2025; new, not ranked in FY2020.
47	PVP Advanced EO Systems, Inc. Top agencies USAF (Department of the Air Force) DOT (Department of Transportation)	$372,679	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
48	MCT Industries, Inc. Top agencies USAF (Department of the Air Force)	$370,557	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
49	Isocolor Inc. Top agencies Treasury (Department of the Treasury)	$367,000	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
50	L-1 Standards and Technology, Inc. Top agencies NASA (National Aeronautics and Space Administration)	$363,860	0.2%	Rank history: #46 in FY2022, #61 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
51	Proaim Americas, Llc. Top agencies VA (Department of Veterans Affairs)	$360,903	0.2%	Rank history: #15 in FY2022 and not on the FY2023–FY2025 lists; down 3 since FY2020.
52	Leonardo S.p.A. 2 awardees, including DRS Network & Imaging Systems LLC and Daylight Solutions Inc. Top agencies USSOCOM (United States Special Operations Command) DLA (Defense Logistics Agency) Navy (Department of the Navy)	$355,886	0.2%	Rank history: #33 in FY2022, #56 in FY2023, #46 in FY2024 and #50 in FY2025; down 40 since FY2020.
53	Technical Communities, Inc. Top agencies DOT (Department of Transportation) Army (Department of the Army) USAF (Department of the Air Force)	$336,990	0.2%	Rank history: #47 in FY2022, not on the FY2023 list, #11 in FY2024 and #58 in FY2025; down 33 since FY2020.
54	Stephen Paul Mangum Top agencies DHS (Department of Homeland Security) Navy (Department of the Navy)	$325,170	0.2%	Rank history: not on the FY2022 list, #55 in FY2023 and not on the FY2024–FY2025 lists; up 27 since FY2020.
55	Aantilia LLC Top agencies USAF (Department of the Air Force) DOJ (Department of Justice) NASA (National Aeronautics and Space Administration)	$313,082	0.2%	Rank history: #68 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
56	Bluehalo, LLC Top agencies NASA (National Aeronautics and Space Administration)	$301,638	0.2%	Rank history: not on the FY2022–FY2025 lists; down 5 since FY2020.
57	Salvo Technologies, Inc. Top agencies DLA (Defense Logistics Agency)	$298,323	0.2%	Rank history: not on the FY2022–FY2025 lists; up 88 since FY2020.
58	Tolgaastro LLC Top agencies USAF (Department of the Air Force)	$285,950	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
59	Intergraph Corporation Through Hexagon Manufacturing Intelligence, LLC Top agencies USAF (Department of the Air Force)	$281,645	0.2%	Rank history: not on the FY2022–FY2025 lists; up 121 since FY2020.
60	Dantec Dynamics Inc. Top agencies NASA (National Aeronautics and Space Administration)	$277,860	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
61	Faro Technologies Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) CPSC (Consumer Product Safety Commission)	$270,715	0.2%	Rank history: not on the FY2022–FY2025 lists; up 67 since FY2020.
62	Terzic Instruments LLC Top agencies USDA (Department of Agriculture)	$269,925	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
63	Trimble Inc. Top agencies USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$269,601	0.2%	Rank history: not on the FY2022–FY2025 lists; up 298 since FY2020.
64	Traverse Solutions & Instrumentation, LLC Top agencies NASA (National Aeronautics and Space Administration)	$264,711	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
65	Ensign-Bickford Industries Inc. Through Honeybee Robotics, Ltd. Top agencies NASA (National Aeronautics and Space Administration)	$255,808	0.2%	Rank history: not on the FY2022–FY2025 lists; down 38 since FY2020.
66	Riegl Usa, Inc. Top agencies Army (Department of the Army)	$255,227	0.2%	Rank history: #53 in FY2022 and not on the FY2023–FY2025 lists; up 68 since FY2020.
67	Tobii Technology Inc. Top agencies Army (Department of the Army) VA (Department of Veterans Affairs)	$250,323	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
68	Hexagon Metrology Inc. Through Hexagon Manufacturing Intelligence, LLC Top agencies Navy (Department of the Navy)	$249,775	0.1%	Rank history: #77 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
69	Surface Optics Corporation Top agencies Army (Department of the Army)	$247,569	0.1%	Rank history: not on the FY2022–FY2025 lists; up 143 since FY2020.
70	Wesco International, Inc. Through Accu-Tech Corporation Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$246,912	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
71	Electronic Product Services LLC Top agencies USAF (Department of the Air Force)	$243,000	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
72	Abbott Laboratories Top agencies VA (Department of Veterans Affairs)	$225,000	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
73	Gould Technology, LLC Top agencies Navy (Department of the Navy)	$225,000	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
74	GFS Supply & Services Company, Inc. Top agencies Navy (Department of the Navy)	$219,596	0.1%	Rank history: not on the FY2022 list, #53 in FY2023, #24 in FY2024 and not on the FY2025 list; up 92 since FY2020.
75	Nanoscience Instruments Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army)	$213,208	0.1%	Rank history: #63 in FY2022, not on the FY2023 list, #45 in FY2024 and not on the FY2025 list; down 15 since FY2020.
76	Intertest, Inc. Top agencies Army (Department of the Army)	$210,360	0.1%	Rank history: not on the FY2022–FY2024 lists and #62 in FY2025; down 10 since FY2020.
77	Sellers Optical, Inc. Top agencies Navy (Department of the Navy)	$201,390	0.1%	Rank history: #55 in FY2022, #64 in FY2023, not on the FY2024 list and #68 in FY2025; new, not ranked in FY2020.
78	Smiths Group PLC Through Smiths Detection Inc. Top agencies DHS (Department of Homeland Security)	$192,932	0.1%	Rank history: #51 in FY2022 and not on the FY2023–FY2025 lists; up 152 since FY2020.
79	Tyonek Native Corporatio Through Tyonek Engineering & Agile Manufacturing LLC Top agencies USAF (Department of the Air Force)	$186,793	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
80	Advanced Inspection Technologies Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$183,354	0.1%	Rank history: not on the FY2022–FY2025 lists; up 265 since FY2020.
81	4 D Technology Corporation Top agencies USAF (Department of the Air Force)	$180,380	0.1%	Rank history: #30 in FY2022 and not on the FY2023–FY2025 lists; up 215 since FY2020.
82	Kell Systems Inc. Top agencies USAF (Department of the Air Force)	$179,323	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
83	Corps Biologics LLC Top agencies VA (Department of Veterans Affairs)	$176,098	0.1%	Rank history: not on the FY2022–FY2025 lists; down 3 since FY2020.
84	Rigaku Americas Holding Inc Top agencies Army (Department of the Army)	$174,995	0.1%	Rank history: not on the FY2022–FY2023 lists, #76 in FY2024 and not on the FY2025 list; down 63 since FY2020.
85	Corps Medical Supply, LLC Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) USAF (Department of the Air Force)	$172,687	0.1%	Rank history: not on the FY2022–FY2023 lists, #27 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
86	Cad / Cam Services, Inc. Top agencies USAF (Department of the Air Force)	$166,348	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
87	Optimax Systems, Inc. Top agencies Navy (Department of the Navy)	$163,155	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
88	Sechan Electronics Inc. Top agencies USAF (Department of the Air Force)	$163,027	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
89	Discovery Semiconductors, Inc. Top agencies Navy (Department of the Navy)	$157,600	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
90	Govage, Inc. Top agencies Army (Department of the Army)	$156,982	0.1%	Rank history: not on the FY2022–FY2024 lists and #95 in FY2025; up 155 since FY2020.
91	Trijicon, Inc. Top agencies Treasury (Department of the Treasury)	$154,350	0.1%	Rank history: not on the FY2022–FY2025 lists; down 23 since FY2020.
92	Anacapa Micro Products, Inc. Top agencies DHS (Department of Homeland Security)	$153,764	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
93	Innovative Imaging & Research Corp Top agencies DOI (Department of the Interior)	$150,000	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
94	American Technology Network, Corp Top agencies DOJ (Department of Justice)	$148,747	0.1%	Rank history: not on the FY2022–FY2025 lists; up 44 since FY2020.
95	Perkinelmer Inc. Through Revvity Health Sciences, Inc. Top agencies USAF (Department of the Air Force)	$144,265	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
96	The Janz Corp Top agencies VA (Department of Veterans Affairs)	$141,674	0.1%	Rank history: not on the FY2022–FY2025 lists; down 39 since FY2020.
97	Theodor Wille Intertrade GMBH Through Atlantic Diving Supply, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) DLA (Defense Logistics Agency)	$141,052	0.1%	Rank history: not on the FY2022 list, #32 in FY2023 and not on the FY2024–FY2025 lists; down 60 since FY2020.
98	Fedcorp Services, Inc. Top agencies Army (Department of the Army)	$139,406	0.1%	Rank history: not on the FY2022–FY2025 lists; up 81 since FY2020.
99	Solar Nebula LLC Top agencies DLA (Defense Logistics Agency)	$137,475	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
100	Mclane Research Laboratories, Inc. Top agencies Commerce (Department of Commerce)	$137,161	0.1%	Rank history: not on the FY2022–FY2025 lists; up 9 since FY2020.

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100 of 442 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 $170 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 2021 ran Oct 1, 2020 – Sep 30, 2021. 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 FY2020. "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 FY2020 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 6650 contractors in FY2021?

1. L3Harris Technologies, Inc. ($62.1M), 2. Ametek Inc. ($18.3M), 3. Lockheed Martin Corporation ($5.2M), 4. Jeol Ltd. ($3.56M), 5. RTX Corporation ($3.2M), 6. Gastops Ltd. ($3.14M), 7. Waygate Technologies USA LP ($3M), 8. Optex Systems Inc. ($2.64M), 9. Telops Inc. ($2.29M), 10. Federal Resources Supply Company ($2.21M).

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