Top 100 Contractors in PSC 6110: Electrical Control Equipment, FY2021

Name: Top 100 Contractors in PSC 6110: Electrical Control Equipment, FY2021
Creator: GovTribe

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

The top 10 won 36% of FY2021 PSC 6110 contract dollars

Contract obligations: $84,091,034 Net of deobligations, by contracts coded PSC 6110
Contractors: 504 Parent companies with an obligation
Largest contractor: ECI Defense Group, Inc. $4.97 million, 5.4% 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	ECI Defense Group, Inc. Top agencies DLA (Defense Logistics Agency)	$4,968,968	5.4%	Rank history: #7 in FY2022, #4 in FY2023, #4 in FY2024 and #6 in FY2025; up 3 since FY2020.
2	Jo-Kell Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) DHS (Department of Homeland Security)	$4,581,192	4.9%	Rank history: #3 in FY2022, #2 in FY2023, #2 in FY2024 and #4 in FY2025; up 6 since FY2020.
3	Leonardo S.p.A. 6 awardees, including DRS Training & Control Systems, LLC, Laurel Technologies Partnership and DRS Naval Power Systems Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$4,235,121	4.6%	Rank history: #30 in FY2022, #26 in FY2023, #14 in FY2024 and #5 in FY2025; up 3 since FY2020.
4	Koontz Electric Company, Incorporated Top agencies Army (Department of the Army)	$4,198,834	4.5%	Rank history: #21 in FY2022 and not on the FY2023–FY2025 lists; down 1 since FY2020.
5	Lynn / Cornerstone Holdings, LLC Through Gracon LLC Top agencies Army (Department of the Army)	$3,587,409	3.9%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
6	Custom Manufacturing & Engineering, Inc. Top agencies Army (Department of the Army)	$2,969,562	3.2%	Rank history: #8 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
7	Government of Canada Through Canadian Commercial Corporation Top agencies Army (Department of the Army) Navy (Department of the Navy)	$2,886,407	3.1%	Rank history: #6 in FY2022, #3 in FY2023, #15 in FY2024 and not on the FY2025 list; down 5 since FY2020.
8	Interconnect Wiring LLP Top agencies USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$2,235,666	2.4%	Rank history: not on the FY2022 list, #36 in FY2023, #51 in FY2024 and #84 in FY2025; up 89 since FY2020.
9	L3Harris Technologies, Inc. 7 awardees, including L3 Technologies, Inc., L3Harris Maritime Power & Energy Solutions, Inc. and CAE USA Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$2,088,616	2.3%	Rank history: #10 in FY2022, #9 in FY2023, #54 in FY2024 and #79 in FY2025; up 22 since FY2020.
10	RTX Corporation 9 awardees, including Raytheon Company and Hamilton Sundstrand Corporation Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$1,774,635	1.9%	Rank history: #1 in FY2022, #1 in FY2023, #1 in FY2024 and #3 in FY2025; up 2 since FY2020.
11	Woodward Governor Company 2 awardees, including Woodward, Inc. and MPC Products Corporation Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$1,770,345	1.9%	Rank history: #25 in FY2022, #30 in FY2023, #26 in FY2024 and not on the FY2025 list; up 33 since FY2020.
12	Maetec Power, LLC Top agencies DOT (Department of Transportation)	$1,610,240	1.7%	Rank history: not on the FY2022 list, #18 in FY2023 and not on the FY2024–FY2025 lists; up 22 since FY2020.
13	Mission Solutions Group Inc. Through Marshall Communications Corp Top agencies DISA (Defense Information Systems Agency)	$1,507,853	1.6%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
14	Kampi Components Co Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$1,492,969	1.6%	Rank history: #17 in FY2022, #6 in FY2023, #19 in FY2024 and #16 in FY2025; up 4 since FY2020.
15	Burke Electric, L.L.C. Top agencies DOI (Department of the Interior)	$1,367,931	1.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
16	Danaher Corporation 2 awardees, including Superior Electric Holding Group LLC and Hach Company Top agencies Navy (Department of the Navy) Treasury (Department of the Treasury)	$1,215,050	1.3%	Rank history: not on the FY2022–FY2025 lists; up 6 since FY2020.
17	Basler Electric Company, LLC Top agencies Navy (Department of the Navy)	$1,156,306	1.2%	Rank history: #65 in FY2022, #48 in FY2023, #29 in FY2024 and not on the FY2025 list; up 177 since FY2020.
18	OM Group Inc. Through Eaglepicher Technologies LLC Top agencies Navy (Department of the Navy)	$1,080,662	1.2%	Rank history: #35 in FY2022, #10 in FY2023 and not on the FY2024–FY2025 lists; up 106 since FY2020.
19	Advantest Corporation Through Astronics Test Systems Inc. Top agencies Navy (Department of the Navy)	$1,056,955	1.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
20	Lockheed Martin Corporation 6 awardees, including Sikorsky Aircraft Corporation Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$1,030,203	1.1%	Rank history: #13 in FY2022, #5 in FY2023, #57 in FY2024 and #18 in FY2025; up 156 since FY2020.
21	ABB Inc. 4 awardees Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$985,332	1.1%	Rank history: not on the FY2022–FY2025 lists; down 16 since FY2020.
22	Reon Inc. Top agencies HHS (Department of Health and Human Services)	$955,187	1.0%	Rank history: not on the FY2022–FY2025 lists; up 10 since FY2020.
23	General Electric Company 7 awardees, including GE Aviation Systems LLC Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$858,545	0.9%	Rank history: #16 in FY2022, #8 in FY2023, not on the FY2024 list and #2 in FY2025; up 17 since FY2020.
24	American Engineering Corporation Top agencies Navy (Department of the Navy)	$847,577	0.9%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
25	Uusi, LLC Top agencies DLA (Defense Logistics Agency)	$846,410	0.9%	Rank history: #9 in FY2022, #21 in FY2023, #21 in FY2024 and #13 in FY2025; down 11 since FY2020.
26	Pioneer Industries, LLC Top agencies DLA (Defense Logistics Agency)	$823,536	0.9%	Rank history: #40 in FY2022, #96 in FY2023, #41 in FY2024 and #40 in FY2025; up 123 since FY2020.
27	Ultra Electronics Forensic Technology Inc Through Ems Development Corporation Top agencies Navy (Department of the Navy)	$800,434	0.9%	Rank history: #62 in FY2022 and not on the FY2023–FY2025 lists; up 175 since FY2020.
28	Ruta Supplies Inc. Top agencies Navy (Department of the Navy)	$731,032	0.8%	Rank history: not on the FY2022–FY2025 lists; up 133 since FY2020.
29	B.c. Systems Inc. Top agencies DLA (Defense Logistics Agency)	$711,839	0.8%	Rank history: #28 in FY2022, #23 in FY2023, #25 in FY2024 and #39 in FY2025; up 4 since FY2020.
30	D&D Construction Services JV, LLC Top agencies USAF (Department of the Air Force)	$632,956	0.7%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
31	Technical Communities, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) DOS (Department of State)	$628,449	0.7%	Rank history: not on the FY2022–FY2024 lists and #83 in FY2025; up 301 since FY2020.
32	Triman Industries Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) DHS (Department of Homeland Security)	$626,179	0.7%	Rank history: #18 in FY2022, #27 in FY2023, #11 in FY2024 and #11 in FY2025; down 8 since FY2020.
33	Oshkosh Corp 2 awardees, including Oshkosh Defense LLC and JLG Industries, Inc. Top agencies DLA (Defense Logistics Agency)	$618,559	0.7%	Rank history: #23 in FY2022, #19 in FY2023 and not on the FY2024–FY2025 lists; up 12 since FY2020.
34	Science Applications International Corporation 2 awardees, including Asrc Federal Facilities Logistics, LLC Top agencies DLA (Defense Logistics Agency)	$606,604	0.7%	Rank history: #96 in FY2022, #97 in FY2023 and not on the FY2024–FY2025 lists; up 34 since FY2020.
35	TE Connectivity Corporation 2 awardees Top agencies DLA (Defense Logistics Agency)	$605,564	0.7%	Rank history: #32 in FY2022 and not on the FY2023–FY2025 lists; up 35 since FY2020.
36	General Dynamics Corporation 5 awardees, including Electric Boat Corporation, General Dynamics Information Technology, Inc. and General Dynamics Mission Systems, Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$602,184	0.6%	Rank history: #37 in FY2022, not on the FY2023–FY2024 lists and #1 in FY2025; down 27 since FY2020.
37	R & M Government Services Inc. Top agencies DLA (Defense Logistics Agency)	$547,320	0.6%	Rank history: #83 in FY2022 and not on the FY2023–FY2025 lists; up 52 since FY2020.
38	Dimo Corp Top agencies DLA (Defense Logistics Agency)	$514,900	0.6%	Rank history: not on the FY2022–FY2025 lists; up 46 since FY2020.
39	Bogue Systems Inc. Top agencies Navy (Department of the Navy)	$493,594	0.5%	Rank history: not on the FY2022–FY2025 lists; up 35 since FY2020.
40	Honeywell Limited Through Honeywell Aerospace International Inc. Top agencies Navy (Department of the Navy)	$479,223	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
41	C E Niehoff & Co Top agencies DLA (Defense Logistics Agency)	$442,813	0.5%	Rank history: #33 in FY2022, #22 in FY2023, #34 in FY2024 and #42 in FY2025; down 20 since FY2020.
42	Point Breeze Communications, Inc. Top agencies VA (Department of Veterans Affairs)	$431,760	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
43	Lake Shore Systems, Inc. 2 awardees Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$431,209	0.5%	Rank history: #72 in FY2022 and not on the FY2023–FY2025 lists; up 19 since FY2020.
44	Gemcap Components Inc. Top agencies DLA (Defense Logistics Agency)	$403,397	0.4%	Rank history: #46 in FY2022, #71 in FY2023, #23 in FY2024 and #74 in FY2025; down 19 since FY2020.
45	Coordinated Defense Supply Systems, Inc. Top agencies DLA (Defense Logistics Agency)	$403,306	0.4%	Rank history: not on the FY2022–FY2025 lists; up 12 since FY2020.
46	Cargotec OYJ Through Independent Rough Terrain Center LLC Top agencies DLA (Defense Logistics Agency)	$393,455	0.4%	Rank history: not on the FY2022–FY2025 lists; up 37 since FY2020.
47	Adirondack Electronics Inc. Top agencies Navy (Department of the Navy)	$390,482	0.4%	Rank history: #74 in FY2022 and not on the FY2023–FY2025 lists; down 19 since FY2020.
48	U.s. Pan American Solutions LLC Top agencies Navy (Department of the Navy)	$384,293	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
49	Circuit Media LLC Top agencies DOE (Department of Energy)	$361,221	0.4%	Rank history: not on the FY2022 list, #47 in FY2023, #90 in FY2024 and not on the FY2025 list; down 3 since FY2020.
50	Schneider Electric Buildings Americas Inc. 6 awardees, including Asco Power Technologies, L..p., Schneider Electric Federal, Inc. and Schneider Electric Usa, Inc. Top agencies DLA (Defense Logistics Agency) DOS (Department of State) VA (Department of Veterans Affairs)	$357,318	0.4%	Rank history: not on the FY2022–FY2025 lists; up 16 since FY2020.
51	Elmo Motion Control Limited Top agencies DLA (Defense Logistics Agency)	$341,370	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
52	Statz Corp Top agencies DLA (Defense Logistics Agency)	$338,199	0.4%	Rank history: #52 in FY2022 and not on the FY2023–FY2025 lists; down 26 since FY2020.
53	Fairbanks Morse LLC Through Ward Leonard CT LLC Top agencies DHS (Department of Homeland Security)	$312,816	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
54	Mary Helen Parkey Top agencies DHS (Department of Homeland Security) Navy (Department of the Navy) DOE (Department of Energy)	$307,871	0.3%	Rank history: not on the FY2022 list, #62 in FY2023, #63 in FY2024 and #81 in FY2025; up 306 since FY2020.
55	Richard Manufacturing Company Top agencies USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$306,246	0.3%	Rank history: #48 in FY2022, #68 in FY2023, #39 in FY2024 and #55 in FY2025; up 49 since FY2020.
56	BAE Systems PLC 2 awardees, including BAE Systems Land & Armaments L.P. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$295,666	0.3%	Rank history: #38 in FY2022, #81 in FY2023 and not on the FY2024–FY2025 lists; down 19 since FY2020.
57	Johnson Controls Security Solutions LLC 4 awardees, including Johnson Controls Inc., Johnson Controls Building Automation Systems, LLC and Johnson Controls Navy Systems, LLC Top agencies USDA (Department of Agriculture) DOJ (Department of Justice) DOS (Department of State)	$295,338	0.3%	Rank history: #45 in FY2022 and not on the FY2023–FY2025 lists; up 433 since FY2020.
58	S I T Corporation Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$290,820	0.3%	Rank history: #98 in FY2022, #85 in FY2023, #47 in FY2024 and #97 in FY2025; up 52 since FY2020.
59	PD Systems, LLC Top agencies MDA (DOD Missile Defense Agency)	$280,563	0.3%	Rank history: not on the FY2022–FY2025 lists; down 49 since FY2020.
60	Creating Technology Solutions LLC Top agencies DLA (Defense Logistics Agency)	$280,172	0.3%	Rank history: not on the FY2022–FY2023 lists, #95 in FY2024 and not on the FY2025 list; down 11 since FY2020.
61	GE Aviation Systems LLC Top agencies Navy (Department of the Navy)	$279,350	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
62	Caterpillar Inc. 2 awardees, including Carter Machinery Company, Incorporated Top agencies DLA (Defense Logistics Agency) DOJ (Department of Justice) DHS (Department of Homeland Security)	$278,600	0.3%	Rank history: not on the FY2022–FY2025 lists; up 100 since FY2020.
63	TNL Sales LLC Top agencies DLA (Defense Logistics Agency)	$243,726	0.3%	Rank history: not on the FY2022 list, #37 in FY2023, #40 in FY2024 and #95 in FY2025; down 25 since FY2020.
64	Lowen Marine & Industrial LLC Top agencies Navy (Department of the Navy)	$243,478	0.3%	Rank history: #69 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
65	Nida Corporation Top agencies USAF (Department of the Air Force) DHS (Department of Homeland Security)	$242,527	0.3%	Rank history: not on the FY2022–FY2025 lists; up 87 since FY2020.
66	ADB Safegate Americas LLC Top agencies USAF (Department of the Air Force) DOT (Department of Transportation)	$238,432	0.3%	Rank history: not on the FY2022 list, #24 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
67	Lex Products, LLC Top agencies DLA (Defense Logistics Agency)	$233,616	0.3%	Rank history: not on the FY2022 list, #54 in FY2023 and not on the FY2024–FY2025 lists; down 37 since FY2020.
68	Phoenix Systems Engineering Inc. Top agencies DLA (Defense Logistics Agency)	$233,171	0.3%	Rank history: not on the FY2022–FY2024 lists and #60 in FY2025; up 103 since FY2020.
69	Components Corporation of America Through Staco Systems, Inc. Top agencies Navy (Department of the Navy)	$225,928	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
70	Thales Through Thales Defense & Security Inc. Top agencies DLA (Defense Logistics Agency)	$224,991	0.2%	Rank history: #34 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
71	Surplus Electrical Innovations, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$219,517	0.2%	Rank history: not on the FY2022–FY2025 lists; up 74 since FY2020.
72	MKC Electronics Inc. Top agencies DLA (Defense Logistics Agency)	$213,886	0.2%	Rank history: not on the FY2022 list, #64 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
73	BBA Aviation PLC Through Ontic Engineering & Manufacturing, Inc. Top agencies Navy (Department of the Navy)	$213,799	0.2%	Rank history: #4 in FY2022, #11 in FY2023 and not on the FY2024–FY2025 lists; down 23 since FY2020.
74	United Dynamics, Inc. Top agencies DLA (Defense Logistics Agency)	$200,130	0.2%	Rank history: not on the FY2022–FY2025 lists; up 41 since FY2020.
75	The Dewey Electronics Corporation Top agencies DLA (Defense Logistics Agency)	$195,592	0.2%	Rank history: not on the FY2022–FY2025 lists; up 17 since FY2020.
76	Nag, LLC Top agencies Navy (Department of the Navy)	$191,960	0.2%	Rank history: #93 in FY2022, #65 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
77	Empire Avionics Corp. Top agencies DLA (Defense Logistics Agency)	$191,720	0.2%	Rank history: #67 in FY2022 and not on the FY2023–FY2025 lists; up 45 since FY2020.
78	Logus Manufacturing Corp. Top agencies Navy (Department of the Navy)	$189,740	0.2%	Rank history: #100 in FY2022, #70 in FY2023 and not on the FY2024–FY2025 lists; up 66 since FY2020.
79	Airborne Supply Inc. Top agencies DLA (Defense Logistics Agency)	$183,776	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
80	Siemens Aktiengesellschaft Through Siemens Industry Inc. Top agencies GSA (General Services Administration) Smithsonian (Smithsonian Institution) DOJ (Department of Justice)	$181,067	0.2%	Rank history: not on the FY2022–FY2025 lists; down 1 since FY2020.
81	Concurrent Technologies Corp Through CTC Enterprise Ventures Corp Top agencies Navy (Department of the Navy)	$180,155	0.2%	Rank history: #15 in FY2022, #98 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
82	Industrial & Construction Enterprises Inc. Top agencies Navy (Department of the Navy)	$179,532	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
83	Wisefox Solutions, Inc. Top agencies DOJ (Department of Justice)	$178,775	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
84	Windward Enterprises, LLC Top agencies DLA (Defense Logistics Agency)	$176,565	0.2%	Rank history: #86 in FY2022, #25 in FY2023, #69 in FY2024 and #68 in FY2025; down 48 since FY2020.
85	Elevated Technologies Services, LLC Top agencies DOJ (Department of Justice)	$175,000	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
86	Argo Turboserve Corporation Top agencies DLA (Defense Logistics Agency)	$174,534	0.2%	Rank history: #85 in FY2022, #94 in FY2023 and not on the FY2024–FY2025 lists; up 4 since FY2020.
87	Thundercat Technology, LLC Top agencies VA (Department of Veterans Affairs)	$170,768	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
88	SSI Technology Inc. Top agencies DLA (Defense Logistics Agency)	$169,780	0.2%	Rank history: not on the FY2022–FY2025 lists; down 23 since FY2020.
89	Carolina Power Systems of Sumter Inc. Top agencies DLA (Defense Logistics Agency)	$168,502	0.2%	Rank history: #80 in FY2022, not on the FY2023–FY2024 lists and #73 in FY2025; up 118 since FY2020.
90	Linmarr Associates, Inc. Top agencies DLA (Defense Logistics Agency)	$161,082	0.2%	Rank history: not on the FY2022–FY2024 lists and #65 in FY2025; up 141 since FY2020.
91	Projects Unlimited Inc. Top agencies Navy (Department of the Navy)	$156,082	0.2%	Rank history: not on the FY2022 list, #29 in FY2023, not on the FY2024 list and #29 in FY2025; up 315 since FY2020.
92	Morpac Industries, Inc. Top agencies DLA (Defense Logistics Agency)	$153,275	0.2%	Rank history: not on the FY2022 list, #56 in FY2023, #89 in FY2024 and #47 in FY2025; up 58 since FY2020.
93	Westsim Engineering, Inc. Top agencies DLA (Defense Logistics Agency)	$149,276	0.2%	Rank history: #58 in FY2022 and not on the FY2023–FY2025 lists; up 63 since FY2020.
94	Danbury Mission Technologies LLC Top agencies DHS (Department of Homeland Security)	$146,096	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
95	Orbit International Corp. Top agencies Navy (Department of the Navy)	$145,307	0.2%	Rank history: not on the FY2022–FY2025 lists; down 60 since FY2020.
96	Textron Inc. Through Bell Textron Inc. Top agencies Navy (Department of the Navy)	$144,600	0.2%	Rank history: not on the FY2022–FY2025 lists; down 11 since FY2020.
97	Centroid, Inc. Top agencies DLA (Defense Logistics Agency)	$142,215	0.2%	Rank history: not on the FY2022–FY2023 lists, #42 in FY2024 and #77 in FY2025; down 68 since FY2020.
98	Next Generation Logistics, LLC Top agencies USAF (Department of the Air Force)	$142,120	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
99	Kit Pack, LLC Top agencies DLA (Defense Logistics Agency)	$141,242	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
100	Phoenix Trading Inc. Top agencies DLA (Defense Logistics Agency)	$137,289	0.1%	Rank history: not on the FY2022 list, #69 in FY2023 and not on the FY2024–FY2025 lists; up 23 since FY2020.

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100 of 504 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 $92.8 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 6110 contractors in FY2021?

1. ECI Defense Group, Inc. ($4.97M), 2. Jo-Kell Inc. ($4.58M), 3. Leonardo S.p.A. ($4.24M), 4. Koontz Electric Company, Incorporated ($4.2M), 5. Lynn / Cornerstone Holdings, LLC ($3.59M), 6. Custom Manufacturing & Engineering, Inc. ($2.97M), 7. Government of Canada ($2.89M), 8. Interconnect Wiring LLP ($2.24M), 9. L3Harris Technologies, Inc. ($2.09M), 10. RTX Corporation ($1.77M).

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