Top 100 Contractors in PSC 6610: Flight Instruments, FY2021

Name: Top 100 Contractors in PSC 6610: Flight Instruments, FY2021
Creator: GovTribe

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

The top 10 won 85% of FY2021 PSC 6610 contract dollars

Contract obligations: $196,655,404 Net of deobligations, by contracts coded PSC 6610
Contractors: 150 Parent companies with an obligation
Largest contractor: Southwest Research Institute $94.3 million, 46.9% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Southwest Research Institute Top agencies NASA (National Aeronautics and Space Administration) Commerce (Department of Commerce)	$94,310,450	46.9%	Rank history: #5 in FY2022, #14 in FY2023, #24 in FY2024 and #1 in FY2025; unchanged since FY2020.
2	RTX Corporation 11 awardees, including Rosemount Aerospace Inc., Hornet Acquisitionco, LLC and Rockwell Collins, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) DHS (Department of Homeland Security)	$15,920,440	7.9%	Rank history: #2 in FY2022, #1 in FY2023, #1 in FY2024 and #18 in FY2025; unchanged since FY2020.
3	Thales 2 awardees, including Thales Defense & Security Inc. and Thales Belgium Top agencies Navy (Department of the Navy)	$13,861,867	6.9%	Rank history: #7 in FY2022, not on the FY2023 list, #4 in FY2024 and #17 in FY2025; unchanged since FY2020.
4	Honeywell International Inc. 8 awardees Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$13,126,783	6.5%	Rank history: #48 in FY2022, #4 in FY2023, #12 in FY2024 and #13 in FY2025; up 2 since FY2020.
5	L3Harris Technologies, Inc. 5 awardees, including Acron Aviation, Inc. and L3 Aviation Products, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$8,680,508	4.3%	Rank history: #4 in FY2022, #9 in FY2023, #3 in FY2024 and #4 in FY2025; unchanged since FY2020.
6	Ensign-Bickford Industries Inc. Through Honeybee Robotics, Ltd. Top agencies NASA (National Aeronautics and Space Administration)	$6,806,500	3.4%	Rank history: #1 in FY2022, #5 in FY2023, #8 in FY2024 and not on the FY2025 list; up 1 since FY2020.
7	Transaero, Inc. Top agencies Army (Department of the Army)	$4,697,351	2.3%	Rank history: #18 in FY2022, #16 in FY2023, #6 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
8	Ontic Engineering & Manufacturing UK Limited Top agencies Navy (Department of the Navy)	$4,404,482	2.2%	Rank history: not on the FY2022–FY2025 lists; up 90 since FY2020.
9	Transdigm Group Incorporated 2 awardees, including Aerosonic LLC and Symetrics Industries, LLC Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security) Navy (Department of the Navy)	$4,377,413	2.2%	Rank history: #12 in FY2022, #23 in FY2023, #28 in FY2024 and not on the FY2025 list; unchanged since FY2020.
10	H C Merchandisers, Inc. Top agencies DLA (Defense Logistics Agency)	$4,023,645	2.0%	Rank history: #20 in FY2022, #18 in FY2023, not on the FY2024 list and #25 in FY2025; up 1 since FY2020.
11	Qual-TEC Management Corp Through Carp Industries Corp Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force)	$2,909,315	1.4%	Rank history: #13 in FY2022, #17 in FY2023, #17 in FY2024 and not on the FY2025 list; up 4 since FY2020.
12	Sanmina-SCI Corporation Through SCI Technology, Inc. Top agencies DHS (Department of Homeland Security)	$2,685,600	1.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
13	State of California Controllers Office Through The Regents of the University of California Top agencies Commerce (Department of Commerce)	$2,615,000	1.3%	Rank history: #14 in FY2022, #19 in FY2023, #32 in FY2024 and not on the FY2025 list; up 18 since FY2020.
14	Curtiss-Wright Corporation 2 awardees, including Curtiss-Wright DS, Inc. and Penny & Giles Aerospace Limited Top agencies Navy (Department of the Navy)	$1,480,952	0.7%	Rank history: #10 in FY2022, #6 in FY2023 and not on the FY2024–FY2025 lists; down 4 since FY2020.
15	Westbase Inc Through Phaostron Instrument and Electronic Company Top agencies DLA (Defense Logistics Agency)	$1,370,450	0.7%	Rank history: #23 in FY2022, #35 in FY2023, #29 in FY2024 and #39 in FY2025; up 10 since FY2020.
16	SAFRAN Through Safran Defense & Space, Inc. Top agencies Navy (Department of the Navy)	$1,300,216	0.6%	Rank history: #11 in FY2022, #13 in FY2023, #16 in FY2024 and #14 in FY2025; up 16 since FY2020.
17	General Electric Company 2 awardees, including GE Aviation Systems LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$933,681	0.5%	Rank history: #3 in FY2022, #15 in FY2023, #52 in FY2024 and #6 in FY2025; up 4 since FY2020.
18	Lockheed Martin Corporation 7 awardees, including Sikorsky Aircraft Corporation and Lockheed Martin Procerus Technologies, L.C. Top agencies Navy (Department of the Navy) DOT (Department of Transportation) Army (Department of the Army)	$930,765	0.5%	Rank history: #6 in FY2022, #8 in FY2023, #2 in FY2024 and #3 in FY2025; down 14 since FY2020.
19	Aarcorp Through AAR Supply Chain, Inc. Top agencies USAF (Department of the Air Force) DLA (Defense Logistics Agency) Navy (Department of the Navy)	$885,584	0.4%	Rank history: #9 in FY2022, #48 in FY2023 and not on the FY2024–FY2025 lists; up 28 since FY2020.
20	Coastline Ltd. Top agencies Army (Department of the Army)	$811,232	0.4%	Rank history: #29 in FY2022 and not on the FY2023–FY2025 lists; up 51 since FY2020.
21	TE Connectivity Corporation Through Measurement Specialties Inc. Top agencies Navy (Department of the Navy)	$654,191	0.3%	Rank history: #24 in FY2022 and not on the FY2023–FY2025 lists; down 9 since FY2020.
22	V. Lopez JR. & Sons General Engineering Contractors, Inc. Top agencies DLA (Defense Logistics Agency)	$643,592	0.3%	Rank history: not on the FY2022–FY2025 lists; up 2 since FY2020.
23	Industrial Smoke & Mirrors, Inc. Top agencies USAF (Department of the Air Force)	$543,357	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
24	Rosemount Aerospace Inc. Top agencies DLA (Defense Logistics Agency)	$508,824	0.3%	Rank history: #42 in FY2022, not on the FY2023 list, #10 in FY2024 and #5 in FY2025; down 10 since FY2020.
25	Kampi Components Co Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$499,309	0.2%	Rank history: not on the FY2022 list, #63 in FY2023, #68 in FY2024 and #75 in FY2025; up 54 since FY2020.
26	Olmsted Instrument Co Top agencies Army (Department of the Army)	$479,720	0.2%	Rank history: #22 in FY2022, #66 in FY2023 and not on the FY2024–FY2025 lists; up 12 since FY2020.
27	Northrop Grumman Corporation Through Northrop Grumman Systems Corporation Top agencies Navy (Department of the Navy)	$460,567	0.2%	Rank history: #8 in FY2022, #11 in FY2023, #15 in FY2024 and #16 in FY2025; up 7 since FY2020.
28	Moog Inc. 2 awardees Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$437,064	0.2%	Rank history: not on the FY2022–FY2025 lists; up 96 since FY2020.
29	Empire Avionics Corp. Top agencies DLA (Defense Logistics Agency)	$386,725	0.2%	Rank history: #28 in FY2022, #33 in FY2023, #97 in FY2024 and #84 in FY2025; up 80 since FY2020.
30	Ibide Corporation Top agencies DLA (Defense Logistics Agency)	$371,090	0.2%	Rank history: #65 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
31	Brighton Cromwell LLC Top agencies DLA (Defense Logistics Agency)	$350,610	0.2%	Rank history: not on the FY2022–FY2025 lists; up 25 since FY2020.
32	BAE Systems PLC 3 awardees, including BAE Systems Information & Electronic Systems Integration Inc. and BAE Systems Controls Inc. Top agencies Navy (Department of the Navy)	$317,747	0.2%	Rank history: #33 in FY2022, #40 in FY2023 and not on the FY2024–FY2025 lists; down 3 since FY2020.
33	Hydraulics International, Inc. Top agencies DLA (Defense Logistics Agency)	$283,366	0.1%	Rank history: #38 in FY2022, #38 in FY2023, #36 in FY2024 and #45 in FY2025; up 24 since FY2020.
34	Innovative Solutions & Support Inc. Top agencies USAF (Department of the Air Force)	$269,408	0.1%	Rank history: #45 in FY2022, #97 in FY2023, not on the FY2024 list and #43 in FY2025; new, not ranked in FY2020.
35	Parker-Hannifin Corporation Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) USAF (Department of the Air Force)	$268,817	0.1%	Rank history: not on the FY2022 list, #85 in FY2023 and not on the FY2024–FY2025 lists; up 5 since FY2020.
36	GFS Supply & Services Company, Inc. Top agencies USAF (Department of the Air Force)	$249,142	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
37	Field Aviation, Inc. Through Ases LLC Top agencies DLA (Defense Logistics Agency)	$243,658	0.1%	Rank history: #32 in FY2022, #42 in FY2023, #56 in FY2024 and not on the FY2025 list; down 14 since FY2020.
38	ECI Defense Group, Inc. Top agencies DLA (Defense Logistics Agency)	$240,653	0.1%	Rank history: #69 in FY2022 and not on the FY2023–FY2025 lists; up 38 since FY2020.
39	Elbit Systems Ltd 2 awardees, including Elbitamerica, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$207,089	0.1%	Rank history: #17 in FY2022, #45 in FY2023, #87 in FY2024 and not on the FY2025 list; down 23 since FY2020.
40	Thales Defense & Security Inc. Top agencies Navy (Department of the Navy)	$191,020	0.1%	Rank history: #15 in FY2022 and not on the FY2023–FY2025 lists; down 3 since FY2020.
41	Aero Precision Industries LLC 2 awardees, including Allclear Aerospace & Defense, Inc. Top agencies DLA (Defense Logistics Agency)	$189,684	0.1%	Rank history: #50 in FY2022, #75 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
42	Aviation Procurement Systems, LLC Top agencies DLA (Defense Logistics Agency)	$177,358	0.1%	Rank history: #53 in FY2022, #43 in FY2023, #66 in FY2024 and #87 in FY2025; new, not ranked in FY2020.
43	CMC Electronique Inc Through CMC Electronics Inc. Top agencies DHS (Department of Homeland Security)	$173,360	0.1%	Rank history: #43 in FY2022 and not on the FY2023–FY2025 lists; up 37 since FY2020.
44	GMS International Corporation Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$157,951	0.1%	Rank history: #49 in FY2022, #72 in FY2023, #61 in FY2024 and #26 in FY2025; up 2 since FY2020.
45	Trimble Inc. 2 awardees, including Applanix Corp Top agencies NASA (National Aeronautics and Space Administration) Navy (Department of the Navy)	$133,377	0.1%	Rank history: not on the FY2022–FY2025 lists; up 22 since FY2020.
46	Greenwich AeroGroup Inc. Through Aero Precision Industries LLC Top agencies DLA (Defense Logistics Agency)	$127,315	0.1%	Rank history: #84 in FY2022 and not on the FY2023–FY2025 lists; up 19 since FY2020.
47	Tiberian Development Group LLC Top agencies DLA (Defense Logistics Agency)	$121,972	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
48	Meggitt PLC 3 awardees, including Meggitt (Uk) Limited and Meggitt (Orange County), Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$117,172	0.1%	Rank history: #37 in FY2022, #76 in FY2023 and not on the FY2024–FY2025 lists; up 5 since FY2020.
49	Rural Route 2, LLC Top agencies DLA (Defense Logistics Agency)	$115,984	0.1%	Rank history: #55 in FY2022, not on the FY2023 list, #39 in FY2024 and #55 in FY2025; new, not ranked in FY2020.
50	Statz Corp Top agencies DLA (Defense Logistics Agency)	$115,714	0.1%	Rank history: #34 in FY2022, #30 in FY2023 and not on the FY2024–FY2025 lists; down 15 since FY2020.
51	Mod-A-Can Inc. Top agencies DLA (Defense Logistics Agency)	$113,560	0.1%	Rank history: #66 in FY2022, #27 in FY2023, #51 in FY2024 and #64 in FY2025; up 1 since FY2020.
52	Woodward Governor Company Through MPC Products Corporation Top agencies DLA (Defense Logistics Agency)	$111,924	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
53	Allied Defense Industries Inc. Through Aero International, LLC Top agencies DLA (Defense Logistics Agency)	$95,759	<0.1%	Rank history: #35 in FY2022, #29 in FY2023 and not on the FY2024–FY2025 lists; up 35 since FY2020.
54	Jamaica Bearings Co., Inc. Top agencies DLA (Defense Logistics Agency)	$95,380	<0.1%	Rank history: #36 in FY2022, #79 in FY2023, #25 in FY2024 and #37 in FY2025; up 4 since FY2020.
55	Airtronics, LLC Top agencies Navy (Department of the Navy)	$94,520	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 22 since FY2020.
56	SOI Aviation, Inc. Top agencies DHS (Department of Homeland Security)	$94,296	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
57	Aircraft Instruments Co Top agencies DLA (Defense Logistics Agency)	$94,285	<0.1%	Rank history: #51 in FY2022, #80 in FY2023, #74 in FY2024 and #63 in FY2025; down 3 since FY2020.
58	Sherwood Avionics and Accessories, Inc. Top agencies DHS (Department of Homeland Security)	$87,513	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 3 since FY2020.
59	Martin Military Inc. Top agencies DLA (Defense Logistics Agency)	$87,420	<0.1%	Rank history: not on the FY2022 list, #46 in FY2023, #33 in FY2024 and #76 in FY2025; up 15 since FY2020.
60	Crestwood Technology Group, LLC Top agencies DHS (Department of Homeland Security) Navy (Department of the Navy)	$83,418	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 86 since FY2020.
61	Beta Engineering, Inc. Top agencies DLA (Defense Logistics Agency)	$78,524	<0.1%	Rank history: not on the FY2022–FY2024 lists and #73 in FY2025; up 60 since FY2020.
62	Vertex LLC Top agencies DLA (Defense Logistics Agency)	$76,701	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 2 since FY2020.
63	Ontic Engineering & Manufacturing, Inc. Through Centroid, Inc. Top agencies DLA (Defense Logistics Agency)	$73,439	<0.1%	Rank history: #39 in FY2022, #22 in FY2023, #42 in FY2024 and #15 in FY2025; new, not ranked in FY2020.
64	Columbia Research Laboratories, Inc. Top agencies DLA (Defense Logistics Agency)	$72,000	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
65	IBP Consulting, Inc. Top agencies DLA (Defense Logistics Agency)	$71,500	<0.1%	Rank history: not on the FY2022 list, #81 in FY2023 and not on the FY2024–FY2025 lists; up 68 since FY2020.
66	S I T Corporation Top agencies DLA (Defense Logistics Agency)	$69,294	<0.1%	Rank history: #44 in FY2022, #68 in FY2023, #81 in FY2024 and #36 in FY2025; up 6 since FY2020.
67	Textron Inc. Through Bell Textron Inc. Top agencies Navy (Department of the Navy)	$64,213	<0.1%	Rank history: #46 in FY2022, #7 in FY2023, #58 in FY2024 and not on the FY2025 list; down 37 since FY2020.
68	Blue Cord Logistic Strategies Inc. Top agencies DLA (Defense Logistics Agency)	$57,938	<0.1%	Rank history: not on the FY2022–FY2023 lists, #90 in FY2024 and #86 in FY2025; new, not ranked in FY2020.
69	Peerless Electronics Inc. Top agencies DLA (Defense Logistics Agency)	$54,304	<0.1%	Rank history: #60 in FY2022, #41 in FY2023, #62 in FY2024 and #59 in FY2025; up 51 since FY2020.
70	Globe Engineering Co., Inc. Top agencies DLA (Defense Logistics Agency)	$52,935	<0.1%	Rank history: not on the FY2022 list, #64 in FY2023, #64 in FY2024 and #78 in FY2025; down 8 since FY2020.
71	Echodyne Corp Top agencies USAF (Department of the Air Force)	$47,633	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
72	Ultra Electronics Forensic Technology Inc Through Ems Development Corporation Top agencies Navy (Department of the Navy)	$47,391	<0.1%	Rank history: not on the FY2022 list, #49 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
73	WKF (Friedman) Enterprises, Inc. Top agencies DLA (Defense Logistics Agency)	$43,947	<0.1%	Rank history: not on the FY2022–FY2023 lists, #73 in FY2024 and #93 in FY2025; down 45 since FY2020.
74	Hoosier Industrial Supply, Inc. Top agencies DLA (Defense Logistics Agency)	$43,450	<0.1%	Rank history: not on the FY2022 list, #92 in FY2023, #60 in FY2024 and #72 in FY2025; up 32 since FY2020.
75	Rhinestahl Corporation Top agencies DLA (Defense Logistics Agency)	$43,365	<0.1%	Rank history: #27 in FY2022 and not on the FY2023–FY2025 lists; up 8 since FY2020.
76	Duncan Aviation Inc. Top agencies Navy (Department of the Navy)	$41,380	<0.1%	Rank history: not on the FY2022–FY2023 lists, #94 in FY2024 and not on the FY2025 list; up 10 since FY2020.
77	Duotech Services LLC Top agencies Navy (Department of the Navy)	$40,300	<0.1%	Rank history: not on the FY2022–FY2023 lists, #83 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
78	Air Shunt Instruments, Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$37,480	<0.1%	Rank history: #100 in FY2022, #67 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
79	Par Defense Industries, LLC Top agencies DLA (Defense Logistics Agency)	$35,373	<0.1%	Rank history: #99 in FY2022, #47 in FY2023, not on the FY2024 list and #32 in FY2025; up 37 since FY2020.
80	Rockwell Automation, Inc. Top agencies Navy (Department of the Navy)	$33,982	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
81	Kearflex Engineering Company Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$33,367	<0.1%	Rank history: not on the FY2022 list, #54 in FY2023, #82 in FY2024 and #97 in FY2025; up 29 since FY2020.
82	Dreamfind, Inc. Top agencies DLA (Defense Logistics Agency)	$32,333	<0.1%	Rank history: #21 in FY2022, #65 in FY2023, #38 in FY2024 and #91 in FY2025; down 14 since FY2020.
83	Kurt J Lesker Co Top agencies NASA (National Aeronautics and Space Administration)	$32,253	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
84	Comperipherals Incorporated Top agencies DLA (Defense Logistics Agency)	$31,996	<0.1%	Rank history: #74 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
85	Spirit Avionics Limited Top agencies DHS (Department of Homeland Security)	$31,076	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
86	Aerosonic LLC Top agencies DHS (Department of Homeland Security)	$30,866	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 8 since FY2020.
87	The Gyro House Top agencies Navy (Department of the Navy)	$30,300	<0.1%	Rank history: #78 in FY2022, #71 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
88	Astronautics Corporation of America Top agencies Navy (Department of the Navy)	$30,000	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 45 since FY2020.
89	Aantilia LLC Top agencies DHS (Department of Homeland Security)	$29,353	<0.1%	Rank history: #88 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
90	Am-Mac Incorporated Top agencies DLA (Defense Logistics Agency)	$27,631	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 51 since FY2020.
91	Ateq & Cobra Aviation, Inc. Top agencies DLA (Defense Logistics Agency)	$25,900	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
92	Northrop Grumman Systems Corporation Top agencies Navy (Department of the Navy)	$24,189	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
93	TNL Sales LLC Top agencies DLA (Defense Logistics Agency)	$21,226	<0.1%	Rank history: #83 in FY2022, #53 in FY2023 and not on the FY2024–FY2025 lists; up 30 since FY2020.
94	BAE Systems Information & Electronic Systems Integration Inc. Top agencies Navy (Department of the Navy)	$21,120	<0.1%	Rank history: not on the FY2022–FY2023 lists, #57 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
95	ACE Aeronautics, LLC Top agencies DLA (Defense Logistics Agency)	$16,310	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 16 since FY2020.
96	Airbus Americas Inc. Through Airbus DS Military Aircraft, Inc. Top agencies DHS (Department of Homeland Security)	$16,205	<0.1%	Rank history: #41 in FY2022, #28 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
97	Ufa, Inc. Top agencies USAF (Department of the Air Force)	$16,125	<0.1%	Rank history: #86 in FY2022, #84 in FY2023, #91 in FY2024 and not on the FY2025 list; down 28 since FY2020.
98	Diversified Technical Systems, Inc. Top agencies Navy (Department of the Navy)	$15,630	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
99	Heico Aerospace Corporat Through Seal Dynamics LLC Top agencies DLA (Defense Logistics Agency)	$15,062	<0.1%	Rank history: not on the FY2022 list, #78 in FY2023, #85 in FY2024 and #53 in FY2025; down 4 since FY2020.
100	Echelon Supply and Service, Inc. Top agencies DLA (Defense Logistics Agency)	$14,919	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.

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100 of 150 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 $201 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 6610 contractors in FY2021?

1. Southwest Research Institute ($94.3M), 2. RTX Corporation ($15.9M), 3. Thales ($13.9M), 4. Honeywell International Inc. ($13.1M), 5. L3Harris Technologies, Inc. ($8.68M), 6. Ensign-Bickford Industries Inc. ($6.81M), 7. Transaero, Inc. ($4.7M), 8. Ontic Engineering & Manufacturing UK Limited ($4.4M), 9. Transdigm Group Incorporated ($4.38M), 10. H C Merchandisers, Inc. ($4.02M).

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