Top 100 Contractors in PSC 5950: Coils and Transformers, FY2021

Name: Top 100 Contractors in PSC 5950: Coils and Transformers, FY2021
Creator: GovTribe

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

The top 10 won 47% of FY2021 PSC 5950 contract dollars

Contract obligations: $32,247,505 Net of deobligations, by contracts coded PSC 5950
Contractors: 336 Parent companies with an obligation
Largest contractor: ECI Defense Group, Inc. $4.88 million, 14.3% 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) Navy (Department of the Navy)	$4,881,157	14.3%	Rank history: #3 in FY2022, #6 in FY2023, #11 in FY2024 and #2 in FY2025; unchanged since FY2020.
2	RTX Corporation 9 awardees, including Raytheon Company, Hamilton Sundstrand Corporation and Rockwell Collins, Inc. Top agencies DLA (Defense Logistics Agency) Army (Department of the Army)	$2,284,917	6.7%	Rank history: #6 in FY2022, #2 in FY2023, #1 in FY2024 and #4 in FY2025; up 7 since FY2020.
3	Honeywell International Inc. 6 awardees, including Grimes Aerospace Company Top agencies DLA (Defense Logistics Agency)	$2,216,167	6.5%	Rank history: #22 in FY2022, #7 in FY2023, #18 in FY2024 and #7 in FY2025; up 3 since FY2020.
4	Syqwest LLC Top agencies Navy (Department of the Navy)	$1,527,650	4.5%	Rank history: not on the FY2022–FY2025 lists; up 1 since FY2020.
5	Precision Electronics, Inc. Top agencies DLA (Defense Logistics Agency) DOT (Department of Transportation)	$1,155,092	3.4%	Rank history: #4 in FY2022, #3 in FY2023, #5 in FY2024 and #6 in FY2025; down 2 since FY2020.
6	Export 220Volt Inc. Top agencies DOS (Department of State)	$1,006,258	2.9%	Rank history: #10 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
7	Jamaica Bearings Co., Inc. Top agencies DLA (Defense Logistics Agency)	$886,251	2.6%	Rank history: #12 in FY2022, #9 in FY2023, #9 in FY2024 and #1 in FY2025; up 4 since FY2020.
8	Aero Precision Industries LLC Through Allclear Aerospace & Defense, Inc. Top agencies DLA (Defense Logistics Agency)	$732,358	2.1%	Rank history: #11 in FY2022, #35 in FY2023, #17 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
9	The Boeing Company 3 awardees, including Argon ST, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$716,034	2.1%	Rank history: #66 in FY2022, not on the FY2023–FY2024 lists and #37 in FY2025; up 34 since FY2020.
10	Jo-Kell Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$529,073	1.5%	Rank history: #16 in FY2022, #4 in FY2023, #2 in FY2024 and #3 in FY2025; down 2 since FY2020.
11	L3Harris Technologies, Inc. 2 awardees, including L3Harris Maritime Power & Energy Solutions, Inc. Top agencies Navy (Department of the Navy)	$509,463	1.5%	Rank history: #5 in FY2022, #15 in FY2023, #82 in FY2024 and #23 in FY2025; down 4 since FY2020.
12	Triman Industries Inc. Top agencies DLA (Defense Logistics Agency)	$499,095	1.5%	Rank history: #33 in FY2022, #32 in FY2023, #41 in FY2024 and #39 in FY2025; up 9 since FY2020.
13	Wright Source Inc. Top agencies DLA (Defense Logistics Agency)	$468,336	1.4%	Rank history: #7 in FY2022, #11 in FY2023, #4 in FY2024 and #13 in FY2025; up 6 since FY2020.
14	Continental Electronics Corporation 2 awardees Top agencies USAGM (US Agency for Global Media)	$455,594	1.3%	Rank history: not on the FY2022–FY2025 lists; up 17 since FY2020.
15	Blue Cord Logistic Strategies Inc. Top agencies DLA (Defense Logistics Agency)	$431,476	1.3%	Rank history: #58 in FY2022, #42 in FY2023, #94 in FY2024 and #94 in FY2025; up 99 since FY2020.
16	Rayco Electronic Manufacturing, Inc. Top agencies DLA (Defense Logistics Agency)	$415,984	1.2%	Rank history: #45 in FY2022 and not on the FY2023–FY2025 lists; up 7 since FY2020.
17	Allied Defense Industries Inc. 3 awardees, including Aero International, LLC and Allied Marine Services LLC Top agencies DLA (Defense Logistics Agency)	$410,332	1.2%	Rank history: #23 in FY2022, #95 in FY2023 and not on the FY2024–FY2025 lists; up 207 since FY2020.
18	Lockheed Martin Corporation 6 awardees, including Sikorsky Aircraft Corporation Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$390,129	1.1%	Rank history: #2 in FY2022, #21 in FY2023, #27 in FY2024 and not on the FY2025 list; up 22 since FY2020.
19	Elbit Systems Ltd Through Elbitamerica, Inc. Top agencies DLA (Defense Logistics Agency)	$374,919	1.1%	Rank history: #15 in FY2022, #48 in FY2023, #47 in FY2024 and not on the FY2025 list; up 15 since FY2020.
20	Integrated Procurement Technologies Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$361,396	1.1%	Rank history: #8 in FY2022, #67 in FY2023, #40 in FY2024 and #11 in FY2025; down 18 since FY2020.
21	Magnetika Inc. 2 awardees Top agencies DLA (Defense Logistics Agency)	$359,245	1.0%	Rank history: #24 in FY2022, #26 in FY2023, #38 in FY2024 and #32 in FY2025; up 3 since FY2020.
22	Jag Components, LLC Top agencies DLA (Defense Logistics Agency)	$341,600	1.0%	Rank history: not on the FY2022 list, #46 in FY2023, #72 in FY2024 and #46 in FY2025; up 146 since FY2020.
23	Leonardo S.p.A. Through Engineered Coil Company Top agencies DHS (Department of Homeland Security) Navy (Department of the Navy) DLA (Defense Logistics Agency)	$340,081	1.0%	Rank history: #40 in FY2022, #54 in FY2023, #52 in FY2024 and not on the FY2025 list; up 129 since FY2020.
24	Aarcorp Through AAR Supply Chain, Inc. Top agencies DLA (Defense Logistics Agency)	$318,063	0.9%	Rank history: #27 in FY2022, #36 in FY2023, #30 in FY2024 and not on the FY2025 list; down 2 since FY2020.
25	Transaero, Inc. Top agencies DLA (Defense Logistics Agency)	$305,426	0.9%	Rank history: #30 in FY2022, #19 in FY2023, #57 in FY2024 and #14 in FY2025; down 13 since FY2020.
26	Martin Military Inc. Top agencies DLA (Defense Logistics Agency)	$297,570	0.9%	Rank history: #47 in FY2022, #59 in FY2023, #25 in FY2024 and #20 in FY2025; up 9 since FY2020.
27	Electronic Transformer Corp Top agencies DLA (Defense Logistics Agency) DOT (Department of Transportation)	$294,265	0.9%	Rank history: #19 in FY2022, #5 in FY2023, #12 in FY2024 and #5 in FY2025; down 9 since FY2020.
28	Aponte Power Services LLC Top agencies Army (Department of the Army)	$274,173	0.8%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
29	Pioneer Industries, LLC Top agencies DLA (Defense Logistics Agency)	$268,644	0.8%	Rank history: #42 in FY2022, #16 in FY2023, #8 in FY2024 and #16 in FY2025; new, not ranked in FY2020.
30	Berkshire Hathaway Inc. Through Tti, Inc. Top agencies DLA (Defense Logistics Agency)	$268,097	0.8%	Rank history: #73 in FY2022 and not on the FY2023–FY2025 lists; up 52 since FY2020.
31	Sora Power Inc. 2 awardees Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$257,620	0.8%	Rank history: #41 in FY2022, #45 in FY2023, #75 in FY2024 and #33 in FY2025; up 42 since FY2020.
32	General Electric Company 6 awardees, including GE Aviation Systems LLC and GE Grid Solutions LLC Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) VA (Department of Veterans Affairs)	$217,694	0.6%	Rank history: #57 in FY2022, #43 in FY2023, not on the FY2024 list and #19 in FY2025; up 14 since FY2020.
33	Autodyne Manufacturing Co Inc. Top agencies DLA (Defense Logistics Agency)	$209,088	0.6%	Rank history: not on the FY2022 list, #84 in FY2023 and not on the FY2024–FY2025 lists; down 3 since FY2020.
34	Aggressive Power Products Inc. Top agencies DLA (Defense Logistics Agency)	$208,590	0.6%	Rank history: #43 in FY2022, #25 in FY2023, #15 in FY2024 and #47 in FY2025; down 8 since FY2020.
35	Engineered Magnetics, Inc. Top agencies DLA (Defense Logistics Agency)	$192,067	0.6%	Rank history: not on the FY2022–FY2025 lists; up 25 since FY2020.
36	Expert Automation Co.,Ltd. Top agencies USAGM (US Agency for Global Media)	$191,677	0.6%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
37	Mary Helen Parkey Top agencies DOE (Department of Energy) Army (Department of the Army)	$187,777	0.5%	Rank history: not on the FY2022–FY2025 lists; up 57 since FY2020.
38	Components Corporation of America Through Staco Energy Products Co Top agencies DLA (Defense Logistics Agency)	$186,298	0.5%	Rank history: #51 in FY2022, #28 in FY2023, #36 in FY2024 and not on the FY2025 list; up 25 since FY2020.
39	Raytheon Company Top agencies DLA (Defense Logistics Agency)	$182,770	0.5%	Rank history: not on the FY2022–FY2025 lists; up 68 since FY2020.
40	Kampi Components Co Inc. Top agencies DLA (Defense Logistics Agency)	$180,470	0.5%	Rank history: #26 in FY2022, #10 in FY2023, #34 in FY2024 and #45 in FY2025; up 11 since FY2020.
41	Howe Machine & Tool Corp. Top agencies DLA (Defense Logistics Agency)	$177,865	0.5%	Rank history: not on the FY2022–FY2025 lists; up 87 since FY2020.
42	RPS Holdings, Inc. Through Rantec Power Systems Inc. Top agencies DLA (Defense Logistics Agency)	$175,636	0.5%	Rank history: #50 in FY2022, #76 in FY2023 and not on the FY2024–FY2025 lists; down 26 since FY2020.
43	Transdigm Group Incorporated 6 awardees, including Tactair Fluid Controls Inc., Champion Aerospace LLC and Avionic Instruments LLC Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$168,251	0.5%	Rank history: #83 in FY2022, #77 in FY2023 and not on the FY2024–FY2025 lists; up 10 since FY2020.
44	Parker-Hannifin Corporation Top agencies DLA (Defense Logistics Agency)	$155,347	0.5%	Rank history: #39 in FY2022, #18 in FY2023, #29 in FY2024 and not on the FY2025 list; down 30 since FY2020.
45	Northrop Grumman Corporation 3 awardees, including Northrop Grumman Systems Corporation Top agencies DLA (Defense Logistics Agency)	$153,563	0.4%	Rank history: #9 in FY2022, #14 in FY2023, #24 in FY2024 and #18 in FY2025; down 41 since FY2020.
46	U.s. Pioneer, L.L.C. Top agencies DLA (Defense Logistics Agency)	$140,338	0.4%	Rank history: #28 in FY2022, #41 in FY2023, #22 in FY2024 and #8 in FY2025; up 39 since FY2020.
47	General Dynamics Corporation Through Electric Boat Corporation Top agencies Navy (Department of the Navy)	$132,560	0.4%	Rank history: not on the FY2022–FY2023 lists, #6 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
48	Dawson Enterprises, Inc. Top agencies USAF (Department of the Air Force)	$130,368	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
49	Robert M. Hadley Company, Inc. Top agencies DLA (Defense Logistics Agency)	$128,133	0.4%	Rank history: not on the FY2022–FY2023 lists, #35 in FY2024 and #25 in FY2025; up 71 since FY2020.
50	Moog Inc. 2 awardees Top agencies DLA (Defense Logistics Agency)	$127,492	0.4%	Rank history: #61 in FY2022, #92 in FY2023 and not on the FY2024–FY2025 lists; up 21 since FY2020.
51	Comsaco, LLC Top agencies DLA (Defense Logistics Agency)	$123,966	0.4%	Rank history: not on the FY2022–FY2025 lists; up 3 since FY2020.
52	Coast / Advanced Chip Magnetics, Inc. Top agencies DLA (Defense Logistics Agency)	$122,327	0.4%	Rank history: #68 in FY2022, #44 in FY2023, #67 in FY2024 and #90 in FY2025; unchanged since FY2020.
53	Homewood Sales Corporation Top agencies Navy (Department of the Navy)	$119,208	0.3%	Rank history: not on the FY2022–FY2025 lists; up 157 since FY2020.
54	Simi Components, Inc. Top agencies DLA (Defense Logistics Agency)	$116,550	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
55	Amphenol Corporation 2 awardees, including Charles Industries, LLC and C & S Antennas, Inc. Top agencies DOT (Department of Transportation) DHS (Department of Homeland Security)	$116,250	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
56	GE Aviation Systems LLC 2 awardees Top agencies DLA (Defense Logistics Agency)	$109,484	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
57	Science Applications International Corporation Through Asrc Federal Facilities Logistics, LLC Top agencies DLA (Defense Logistics Agency)	$107,395	0.3%	Rank history: #34 in FY2022, #8 in FY2023 and not on the FY2024–FY2025 lists; down 25 since FY2020.
58	Mavich, LLC Top agencies DLA (Defense Logistics Agency)	$101,903	0.3%	Rank history: not on the FY2022–FY2024 lists and #59 in FY2025; new, not ranked in FY2020.
59	Aviarms Support Corp Top agencies DLA (Defense Logistics Agency)	$99,201	0.3%	Rank history: not on the FY2022 list, #66 in FY2023, #63 in FY2024 and #30 in FY2025; down 2 since FY2020.
60	Iron Dome Inc. Top agencies DLA (Defense Logistics Agency)	$94,311	0.3%	Rank history: #60 in FY2022, not on the FY2023–FY2024 lists and #74 in FY2025; down 40 since FY2020.
61	FDH Defense Aftermarket, LLC Top agencies DLA (Defense Logistics Agency)	$93,432	0.3%	Rank history: not on the FY2022–FY2024 lists and #83 in FY2025; up 41 since FY2020.
62	Larkos Packing and Distribution Inc. Top agencies DLA (Defense Logistics Agency)	$89,698	0.3%	Rank history: #86 in FY2022, #86 in FY2023, not on the FY2024 list and #60 in FY2025; up 88 since FY2020.
63	Ontic Engineering & Manufacturing, Inc. 2 awardees, including Centroid, Inc. Top agencies DLA (Defense Logistics Agency)	$88,711	0.3%	Rank history: not on the FY2022 list, #50 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
64	Maddox Industrial Transformer, LLC Top agencies USAF (Department of the Air Force)	$88,588	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
65	KBS Electrical Distributors, Inc. Top agencies DOJ (Department of Justice)	$87,808	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
66	TNL Sales LLC Top agencies DLA (Defense Logistics Agency)	$86,245	0.3%	Rank history: not on the FY2022 list, #73 in FY2023, not on the FY2024 list and #76 in FY2025; down 28 since FY2020.
67	Statz Corp Top agencies DLA (Defense Logistics Agency)	$85,923	0.3%	Rank history: #71 in FY2022 and not on the FY2023–FY2025 lists; up 67 since FY2020.
68	Dreamfind, Inc. Top agencies DLA (Defense Logistics Agency)	$84,250	0.2%	Rank history: #20 in FY2022, #49 in FY2023, #69 in FY2024 and #50 in FY2025; down 29 since FY2020.
69	Bright Manufacturing LLC Top agencies DLA (Defense Logistics Agency)	$83,226	0.2%	Rank history: #98 in FY2022 and not on the FY2023–FY2025 lists; down 32 since FY2020.
70	Erra-Mil Components Inc. Top agencies DLA (Defense Logistics Agency)	$81,535	0.2%	Rank history: not on the FY2022 list, #47 in FY2023, #58 in FY2024 and not on the FY2025 list; up 57 since FY2020.
71	Black Bay Aerospace LLC Top agencies DLA (Defense Logistics Agency)	$80,876	0.2%	Rank history: #32 in FY2022, not on the FY2023 list, #87 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
72	Dunamiz DWC LLC Top agencies USAF (Department of the Air Force)	$80,126	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
73	Naschke Mobile Solutions, LLC Top agencies DLA (Defense Logistics Agency)	$78,515	0.2%	Rank history: #29 in FY2022 and not on the FY2023–FY2025 lists; up 28 since FY2020.
74	W.w. Grainger, Inc. Top agencies DOS (Department of State)	$77,100	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
75	S I T Corporation Top agencies DLA (Defense Logistics Agency)	$75,892	0.2%	Rank history: #100 in FY2022, #70 in FY2023, #83 in FY2024 and #92 in FY2025; down 14 since FY2020.
76	Adirondack Electronics Inc. Top agencies Navy (Department of the Navy)	$70,706	0.2%	Rank history: not on the FY2022–FY2025 lists; up 121 since FY2020.
77	Torotel Inc. Top agencies DLA (Defense Logistics Agency)	$63,547	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
78	Graybar Electric Company, Inc. Top agencies DOT (Department of Transportation)	$61,707	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
79	Orchid Electronics, Inc. Top agencies DLA (Defense Logistics Agency)	$59,802	0.2%	Rank history: #64 in FY2022 and not on the FY2023–FY2025 lists; up 58 since FY2020.
80	Freed Transformer Co Top agencies DLA (Defense Logistics Agency)	$58,618	0.2%	Rank history: #75 in FY2022, #75 in FY2023 and not on the FY2024–FY2025 lists; unchanged since FY2020.
81	Imeco Inc. Top agencies Navy (Department of the Navy)	$58,431	0.2%	Rank history: not on the FY2022–FY2025 lists; up 59 since FY2020.
82	Johnson Controls Building Automation Systems, LLC Top agencies DOS (Department of State)	$54,973	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
83	Broad Peak Defense LLC Top agencies DLA (Defense Logistics Agency) DOI (Department of the Interior)	$54,368	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
84	General Dynamics Satcom Technologies Inc. Through CPI Electron Device Business, Inc. Top agencies Navy (Department of the Navy)	$53,916	0.2%	Rank history: not on the FY2022 list, #65 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
85	Detmer Business Group Inc. Top agencies DLA (Defense Logistics Agency)	$53,268	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
86	High To Low Voltage LLC Top agencies DOJ (Department of Justice)	$53,000	0.2%	Rank history: #49 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
87	Aero International, LLC Top agencies DLA (Defense Logistics Agency)	$52,897	0.2%	Rank history: not on the FY2022–FY2023 lists, #93 in FY2024 and #97 in FY2025; new, not ranked in FY2020.
88	Phoenix Systems Engineering Inc. Top agencies DLA (Defense Logistics Agency)	$50,045	0.1%	Rank history: not on the FY2022–FY2025 lists; up 2 since FY2020.
89	Stealth Supply, Inc. Top agencies DLA (Defense Logistics Agency)	$49,102	0.1%	Rank history: not on the FY2022–FY2025 lists; up 23 since FY2020.
90	Phoenix Trading Inc. Top agencies DLA (Defense Logistics Agency)	$47,943	0.1%	Rank history: #89 in FY2022, #61 in FY2023 and not on the FY2024–FY2025 lists; down 7 since FY2020.
91	Baltimore Transformer Co Top agencies DLA (Defense Logistics Agency)	$47,439	0.1%	Rank history: #52 in FY2022, #81 in FY2023, #62 in FY2024 and #82 in FY2025; up 68 since FY2020.
92	Aschbacher & Associates Inc. Top agencies DLA (Defense Logistics Agency)	$46,311	0.1%	Rank history: #74 in FY2022, #89 in FY2023, #66 in FY2024 and #38 in FY2025; down 47 since FY2020.
93	Erie North Electronics Inc Through Omega Associates, Inc. Top agencies DLA (Defense Logistics Agency)	$45,750	0.1%	Rank history: #59 in FY2022, not on the FY2023 list, #70 in FY2024 and #43 in FY2025; new, not ranked in FY2020.
94	Aero Defense Logistics LLC Top agencies DLA (Defense Logistics Agency)	$44,577	0.1%	Rank history: not on the FY2022–FY2025 lists; up 172 since FY2020.
95	D S Interlink Co Top agencies DLA (Defense Logistics Agency)	$43,966	0.1%	Rank history: not on the FY2022 list, #51 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
96	Crane Co 2 awardees, including Merrimac Industries, Inc. and Eldec Aerospace Corp Top agencies DLA (Defense Logistics Agency)	$41,586	0.1%	Rank history: not on the FY2022 list, #17 in FY2023 and not on the FY2024–FY2025 lists; up 21 since FY2020.
97	OEM Laundry Parts, Llc. Top agencies DLA (Defense Logistics Agency)	$41,472	0.1%	Rank history: not on the FY2022–FY2025 lists; up 179 since FY2020.
98	WKF (Friedman) Enterprises, Inc. Top agencies DLA (Defense Logistics Agency)	$40,600	0.1%	Rank history: not on the FY2022–FY2025 lists; up 18 since FY2020.
99	Air Marine Systems, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$40,230	0.1%	Rank history: not on the FY2022–FY2025 lists; up 104 since FY2020.
100	Legacy Product Support Llc. Top agencies DLA (Defense Logistics Agency)	$39,986	0.1%	Rank history: not on the FY2022–FY2025 lists; down 4 since FY2020.

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100 of 336 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 $34.2 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 5950 contractors in FY2021?

1. ECI Defense Group, Inc. ($4.88M), 2. RTX Corporation ($2.28M), 3. Honeywell International Inc. ($2.22M), 4. Syqwest LLC ($1.53M), 5. Precision Electronics, Inc. ($1.16M), 6. Export 220Volt Inc. ($1.01M), 7. Jamaica Bearings Co., Inc. ($886K), 8. Aero Precision Industries LLC ($732K), 9. The Boeing Company ($716K), 10. Jo-Kell Inc. ($529K).

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