Top 100 Contractors in NAICS 334416: Capacitor, Resistor, Coil, Transformer, and Other Inductor Manufacturing, FY2021

Name: Top 100 Contractors in NAICS 334416: Capacitor, Resistor, Coil, Transformer, and Other Inductor Manufacturing, FY2021
Creator: GovTribe

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

The top 10 won 31% of FY2021 NAICS 334416 contract dollars

Contract obligations: $44,804,772 Net of deobligations, by contracts coded NAICS 334416
Contractors: 570 Parent companies with an obligation
Largest contractor: ECI Defense Group, Inc. $4.75 million, 9.9% 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	ECI Defense Group, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$4,746,181	9.9%	Rank history: #4 in FY2022, #7 in FY2023, #17 in FY2024 and #7 in FY2025; unchanged since FY2020.
2	Syqwest LLC Top agencies Navy (Department of the Navy)	$1,527,650	3.2%	Rank history: not on the FY2022–FY2025 lists; up 6 since FY2020.
3	Jo-Kell Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$1,422,511	3.0%	Rank history: #6 in FY2022, #3 in FY2023, #4 in FY2024 and #5 in FY2025; up 1 since FY2020.
4	C E Niehoff & Co Top agencies DLA (Defense Logistics Agency)	$1,301,373	2.7%	Rank history: #3 in FY2022, not on the FY2023 list, #14 in FY2024 and not on the FY2025 list; up 25 since FY2020.
5	Berkshire Hathaway Inc. Through Tti, Inc. Top agencies DLA (Defense Logistics Agency)	$1,184,642	2.5%	Rank history: #5 in FY2022, #56 in FY2023, #70 in FY2024 and #13 in FY2025; up 6 since FY2020.
6	Ontic Engineering & Manufacturing, Inc. 2 awardees, including Centroid, Inc. Top agencies DLA (Defense Logistics Agency)	$1,127,980	2.4%	Rank history: #7 in FY2022, #8 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
7	Jamaica Bearings Co., Inc. 2 awardees Top agencies DLA (Defense Logistics Agency)	$949,908	2.0%	Rank history: #12 in FY2022, #31 in FY2023, #16 in FY2024 and #2 in FY2025; up 7 since FY2020.
8	Advantest Corporation Through Astronics Test Systems Inc. Top agencies USAF (Department of the Air Force)	$931,483	2.0%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
9	RTX Corporation 7 awardees, including Raytheon Company, Goodrich Lighting Systems Inc. and Kidde Technologies Inc. Top agencies DLA (Defense Logistics Agency)	$904,584	1.9%	Rank history: #36 in FY2022, #5 in FY2023, #10 in FY2024 and #18 in FY2025; up 4 since FY2020.
10	Precision Electronics, Inc. Top agencies DLA (Defense Logistics Agency)	$862,184	1.8%	Rank history: #10 in FY2022, #15 in FY2023, #13 in FY2024 and #11 in FY2025; down 7 since FY2020.
11	Transaero, Inc. Top agencies DLA (Defense Logistics Agency)	$845,514	1.8%	Rank history: #16 in FY2022, #12 in FY2023, #20 in FY2024 and #9 in FY2025; down 1 since FY2020.
12	Ultra Electronics Forensic Technology Inc 3 awardees, including Ems Development Corporation and DNE Technologies, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$755,205	1.6%	Rank history: #22 in FY2022, not on the FY2023 list, #89 in FY2024 and #34 in FY2025; unchanged since FY2020.
13	Aero Precision Industries LLC Through Allclear Aerospace & Defense, Inc. Top agencies DLA (Defense Logistics Agency)	$739,710	1.6%	Rank history: #13 in FY2022, #44 in FY2023, #37 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
14	Global Logistics Strategies Inc. Top agencies DLA (Defense Logistics Agency)	$636,441	1.3%	Rank history: #66 in FY2022 and not on the FY2023–FY2025 lists; up 94 since FY2020.
15	L3Harris Technologies, Inc. 4 awardees, including L3Harris Maritime Power & Energy Solutions, Inc., CAE USA Inc. and L3 Technologies, Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$631,606	1.3%	Rank history: #8 in FY2022, #34 in FY2023, not on the FY2024 list and #47 in FY2025; up 22 since FY2020.
16	Kampi Components Co Inc. Top agencies DLA (Defense Logistics Agency)	$619,888	1.3%	Rank history: #9 in FY2022, #10 in FY2023, #15 in FY2024 and #25 in FY2025; up 12 since FY2020.
17	Tesla Industries Inc. Top agencies DLA (Defense Logistics Agency)	$600,547	1.3%	Rank history: #30 in FY2022, #6 in FY2023, #2 in FY2024 and #6 in FY2025; up 18 since FY2020.
18	Foxtronix Inc. Top agencies DLA (Defense Logistics Agency)	$591,724	1.2%	Rank history: #56 in FY2022 and not on the FY2023–FY2025 lists; up 45 since FY2020.
19	IET Labs Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$582,216	1.2%	Rank history: not on the FY2022–FY2025 lists; up 407 since FY2020.
20	Pulsetech Products Corporation Top agencies DLA (Defense Logistics Agency)	$575,288	1.2%	Rank history: #17 in FY2022, #23 in FY2023, #25 in FY2024 and #30 in FY2025; down 18 since FY2020.
21	Martin Military Inc. Top agencies DLA (Defense Logistics Agency)	$527,785	1.1%	Rank history: #49 in FY2022, #20 in FY2023, #41 in FY2024 and #16 in FY2025; down 15 since FY2020.
22	Centroid, Inc. Top agencies DLA (Defense Logistics Agency)	$515,149	1.1%	Rank history: not on the FY2022–FY2025 lists; down 17 since FY2020.
23	Statz Corp Top agencies DLA (Defense Logistics Agency)	$497,648	1.0%	Rank history: #45 in FY2022, #28 in FY2023, #23 in FY2024 and #28 in FY2025; up 32 since FY2020.
24	Pioneer Industries, LLC Top agencies DLA (Defense Logistics Agency)	$462,938	1.0%	Rank history: #42 in FY2022, #24 in FY2023, #21 in FY2024 and #32 in FY2025; down 6 since FY2020.
25	Sora Power Inc. 2 awardees Top agencies DLA (Defense Logistics Agency)	$437,390	0.9%	Rank history: #58 in FY2022, #92 in FY2023, #61 in FY2024 and #55 in FY2025; up 27 since FY2020.
26	Mercatus International Marketing Inc. Top agencies DLA (Defense Logistics Agency)	$429,583	0.9%	Rank history: #32 in FY2022, #48 in FY2023, #33 in FY2024 and #51 in FY2025; up 23 since FY2020.
27	M-Tron Components, Inc. Top agencies DLA (Defense Logistics Agency)	$412,502	0.9%	Rank history: #24 in FY2022, #27 in FY2023, #56 in FY2024 and #56 in FY2025; down 5 since FY2020.
28	Rayco Electronic Manufacturing, Inc. Top agencies DLA (Defense Logistics Agency)	$402,511	0.8%	Rank history: #87 in FY2022 and not on the FY2023–FY2025 lists; up 25 since FY2020.
29	Jgils, LLC Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$391,674	0.8%	Rank history: not on the FY2022–FY2023 lists, #77 in FY2024 and #90 in FY2025; up 47 since FY2020.
30	Elbit Systems Ltd Through Elbitamerica, Inc. Top agencies DLA (Defense Logistics Agency)	$374,919	0.8%	Rank history: #19 in FY2022, #87 in FY2023, #72 in FY2024 and not on the FY2025 list; up 42 since FY2020.
31	Turbine Technics Inc. Top agencies DLA (Defense Logistics Agency)	$364,552	0.8%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
32	Aarcorp Through AAR Supply Chain, Inc. Top agencies DLA (Defense Logistics Agency)	$354,229	0.7%	Rank history: #50 in FY2022, #52 in FY2023 and not on the FY2024–FY2025 lists; down 9 since FY2020.
33	Black Bay Aerospace LLC Top agencies DLA (Defense Logistics Agency)	$352,571	0.7%	Rank history: #54 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
34	Aschbacher & Associates Inc. Top agencies DLA (Defense Logistics Agency)	$331,508	0.7%	Rank history: #31 in FY2022, #17 in FY2023, #11 in FY2024 and #24 in FY2025; down 15 since FY2020.
35	Wright Source Inc. Top agencies DLA (Defense Logistics Agency)	$329,360	0.7%	Rank history: #11 in FY2022, #19 in FY2023, #7 in FY2024 and #27 in FY2025; up 7 since FY2020.
36	Magnetika Inc. 2 awardees Top agencies DLA (Defense Logistics Agency)	$316,968	0.7%	Rank history: #47 in FY2022, #74 in FY2023, #74 in FY2024 and #67 in FY2025; up 29 since FY2020.
37	Blue Cord Logistic Strategies Inc. Top agencies DLA (Defense Logistics Agency)	$311,570	0.7%	Rank history: not on the FY2022 list, #66 in FY2023, #64 in FY2024 and #61 in FY2025; up 48 since FY2020.
38	Amphenol Corporation 3 awardees, including Charles Industries, LLC Top agencies DLA (Defense Logistics Agency) DOT (Department of Transportation)	$310,446	0.7%	Rank history: #46 in FY2022 and not on the FY2023–FY2025 lists; up 22 since FY2020.
39	Vishay Intertechnology, Inc. 2 awardees, including Vishay Dale Electronics, LLC Top agencies DOT (Department of Transportation) Navy (Department of the Navy)	$307,987	0.6%	Rank history: #70 in FY2022 and not on the FY2023–FY2025 lists; up 9 since FY2020.
40	Triman Industries Inc. Top agencies DLA (Defense Logistics Agency)	$302,762	0.6%	Rank history: #37 in FY2022, #9 in FY2023, #8 in FY2024 and #21 in FY2025; down 8 since FY2020.
41	Automated Business Power, Inc. Top agencies DLA (Defense Logistics Agency)	$301,200	0.6%	Rank history: #41 in FY2022, #45 in FY2023, #80 in FY2024 and #74 in FY2025; down 32 since FY2020.
42	S I T Corporation Top agencies DLA (Defense Logistics Agency)	$288,505	0.6%	Rank history: #78 in FY2022, #36 in FY2023, #30 in FY2024 and #50 in FY2025; down 35 since FY2020.
43	Burke Products Inc. Top agencies DLA (Defense Logistics Agency)	$252,810	0.5%	Rank history: #60 in FY2022, #54 in FY2023, #95 in FY2024 and #92 in FY2025; up 57 since FY2020.
44	Jag Components, LLC Top agencies DLA (Defense Logistics Agency)	$247,890	0.5%	Rank history: not on the FY2022 list, #29 in FY2023, #18 in FY2024 and #39 in FY2025; new, not ranked in FY2020.
45	New Yorker Electronics, Inc. Top agencies DLA (Defense Logistics Agency)	$244,683	0.5%	Rank history: #73 in FY2022, #99 in FY2023, #31 in FY2024 and #17 in FY2025; up 6 since FY2020.
46	Transdigm Group Incorporated 8 awardees, including Kirkhill, Inc., Champion Aerospace LLC and CEF Industries, LLC Top agencies DLA (Defense Logistics Agency)	$231,124	0.5%	Rank history: #1 in FY2022, #1 in FY2023 and not on the FY2024–FY2025 lists; up 185 since FY2020.
47	Sensor Systems, L.L.C. Top agencies DLA (Defense Logistics Agency)	$228,889	0.5%	Rank history: #25 in FY2022, #37 in FY2023, #47 in FY2024 and #29 in FY2025; down 2 since FY2020.
48	B & H International LLC Top agencies Navy (Department of the Navy)	$226,554	0.5%	Rank history: not on the FY2022–FY2025 lists; up 61 since FY2020.
49	Phoenix Trading Inc. Top agencies DLA (Defense Logistics Agency)	$219,797	0.5%	Rank history: #39 in FY2022, #63 in FY2023 and not on the FY2024–FY2025 lists; down 15 since FY2020.
50	Electronic Transformer Corp Top agencies DLA (Defense Logistics Agency)	$217,099	0.5%	Rank history: #38 in FY2022, #13 in FY2023, #24 in FY2024 and #10 in FY2025; down 12 since FY2020.
51	Qual-TEC Management Corp Through Carp Industries Corp Top agencies DLA (Defense Logistics Agency)	$214,909	0.5%	Rank history: not on the FY2022 list, #84 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
52	U.s. Pioneer, L.L.C. Top agencies DLA (Defense Logistics Agency)	$213,572	0.4%	Rank history: #33 in FY2022, #55 in FY2023, #49 in FY2024 and #89 in FY2025; up 67 since FY2020.
53	Autodyne Manufacturing Co Inc. Top agencies DLA (Defense Logistics Agency)	$209,088	0.4%	Rank history: not on the FY2022–FY2025 lists; up 8 since FY2020.
54	Lynn Electronics LLC Top agencies DLA (Defense Logistics Agency)	$204,900	0.4%	Rank history: not on the FY2022–FY2025 lists; up 4 since FY2020.
55	Peerless Electronics Inc. Top agencies DLA (Defense Logistics Agency)	$202,976	0.4%	Rank history: not on the FY2022 list, #30 in FY2023 and not on the FY2024–FY2025 lists; down 11 since FY2020.
56	Rsi, Inc. Top agencies DLA (Defense Logistics Agency)	$186,143	0.4%	Rank history: #55 in FY2022, #77 in FY2023, #59 in FY2024 and not on the FY2025 list; down 39 since FY2020.
57	Howe Machine & Tool Corp. Top agencies DLA (Defense Logistics Agency)	$180,177	0.4%	Rank history: not on the FY2022–FY2025 lists; up 149 since FY2020.
58	Advanced Products Services Inc. Top agencies DLA (Defense Logistics Agency)	$178,148	0.4%	Rank history: not on the FY2022 list, #64 in FY2023, not on the FY2024 list and #100 in FY2025; up 20 since FY2020.
59	Brown Helicopter, Inc. Top agencies DLA (Defense Logistics Agency)	$173,016	0.4%	Rank history: not on the FY2022–FY2025 lists; up 311 since FY2020.
60	Leonardo S.p.A. 5 awardees, including Engineered Coil Company, Pivotal Power Inc. and DRS Training & Control Systems, LLC Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$172,616	0.4%	Rank history: #23 in FY2022, not on the FY2023 list, #39 in FY2024 and #46 in FY2025; down 19 since FY2020.
61	Heico Aerospace Corporat 2 awardees, including Seal Dynamics LLC and Leader Tech, Inc. Top agencies DLA (Defense Logistics Agency)	$172,591	0.4%	Rank history: #35 in FY2022, #42 in FY2023, #94 in FY2024 and #69 in FY2025; up 7 since FY2020.
62	Pht Aerospace LLC Top agencies DLA (Defense Logistics Agency)	$167,125	0.4%	Rank history: #40 in FY2022, #71 in FY2023, #42 in FY2024 and #78 in FY2025; down 22 since FY2020.
63	Integrated Procurement Technologies Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$160,801	0.3%	Rank history: not on the FY2022–FY2025 lists; down 48 since FY2020.
64	Echelon Supply and Service, Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$154,936	0.3%	Rank history: not on the FY2022–FY2025 lists; up 59 since FY2020.
65	Adirondack Electronics Inc. Top agencies Navy (Department of the Navy)	$152,047	0.3%	Rank history: not on the FY2022–FY2025 lists; up 108 since FY2020.
66	Mavich, LLC Top agencies DLA (Defense Logistics Agency)	$151,908	0.3%	Rank history: #53 in FY2022, #46 in FY2023, #68 in FY2024 and #98 in FY2025; up 73 since FY2020.
67	Science Applications International Corporation Through Asrc Federal Facilities Logistics, LLC Top agencies DLA (Defense Logistics Agency)	$148,938	0.3%	Rank history: #21 in FY2022, #14 in FY2023 and not on the FY2024–FY2025 lists; down 37 since FY2020.
68	WEK Enterprises LLC Top agencies USAF (Department of the Air Force)	$144,622	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
69	Aviarms Support Corp Top agencies DLA (Defense Logistics Agency)	$142,711	0.3%	Rank history: #90 in FY2022, #50 in FY2023, #34 in FY2024 and #45 in FY2025; up 13 since FY2020.
70	Aggressive Power Products Inc. Top agencies DLA (Defense Logistics Agency)	$137,610	0.3%	Rank history: not on the FY2022 list, #85 in FY2023, #28 in FY2024 and not on the FY2025 list; up 28 since FY2020.
71	Brighton Cromwell LLC Top agencies DLA (Defense Logistics Agency)	$136,071	0.3%	Rank history: #67 in FY2022 and not on the FY2023–FY2025 lists; up 131 since FY2020.
72	ADI American Distributors, LLC Through Microwave Components LLC Top agencies DLA (Defense Logistics Agency)	$135,645	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
73	Edel Engineering Development Co. Top agencies DLA (Defense Logistics Agency)	$134,814	0.3%	Rank history: not on the FY2022 list, #79 in FY2023, #60 in FY2024 and #38 in FY2025; down 19 since FY2020.
74	Dreamfind, Inc. Top agencies DLA (Defense Logistics Agency)	$130,767	0.3%	Rank history: #28 in FY2022, #81 in FY2023, #58 in FY2024 and not on the FY2025 list; down 17 since FY2020.
75	Engie Resources LLC Through Ineo Global Support, Inc. Top agencies DLA (Defense Logistics Agency)	$129,082	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
76	Jolen Services, Inc. Top agencies DLA (Defense Logistics Agency)	$127,046	0.3%	Rank history: #62 in FY2022, #51 in FY2023, #53 in FY2024 and not on the FY2025 list; up 14 since FY2020.
77	DBR Industries, Inc. Top agencies DLA (Defense Logistics Agency)	$122,607	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
78	Homewood Sales Corporation Top agencies Navy (Department of the Navy)	$119,208	0.2%	Rank history: not on the FY2022–FY2025 lists; up 372 since FY2020.
79	Kuog Corp Top agencies Navy (Department of the Navy)	$118,251	0.2%	Rank history: not on the FY2022 list, #43 in FY2023 and not on the FY2024–FY2025 lists; down 32 since FY2020.
80	Daico Industries, Inc. Top agencies DLA (Defense Logistics Agency)	$111,264	0.2%	Rank history: #71 in FY2022 and not on the FY2023–FY2025 lists; down 34 since FY2020.
81	2Lyons Aerospace LLC Top agencies DLA (Defense Logistics Agency)	$110,885	0.2%	Rank history: not on the FY2022 list, #38 in FY2023, #27 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
82	RLH Inc. Top agencies DOE (Department of Energy)	$110,462	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
83	BBA Aviation PLC 2 awardees, including Ontic Engineering & Manufacturing, Inc. and Ontic Engineering & Manufacturing UK Limited Top agencies DLA (Defense Logistics Agency)	$104,393	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
84	H C Merchandisers, Inc. Top agencies DLA (Defense Logistics Agency)	$101,561	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
85	Dela Technology Corporation Top agencies DLA (Defense Logistics Agency)	$101,089	0.2%	Rank history: #92 in FY2022, #47 in FY2023, #93 in FY2024 and not on the FY2025 list; up 1 since FY2020.
86	Fromm Electric Supply of Reading, Penna., LLC Top agencies DLA (Defense Logistics Agency)	$100,503	0.2%	Rank history: not on the FY2022–FY2025 lists; up 113 since FY2020.
87	Components Corporation of America Through Staco Energy Products Co Top agencies DLA (Defense Logistics Agency)	$98,387	0.2%	Rank history: not on the FY2022–FY2025 lists; up 345 since FY2020.
88	Coast / Advanced Chip Magnetics, Inc. Top agencies DLA (Defense Logistics Agency)	$91,583	0.2%	Rank history: not on the FY2022–FY2025 lists; up 26 since FY2020.
89	Servo Instrument Corporation Top agencies DLA (Defense Logistics Agency)	$89,580	0.2%	Rank history: #68 in FY2022, #65 in FY2023, #50 in FY2024 and #42 in FY2025; down 50 since FY2020.
90	Maddox Industrial Transformer, LLC Top agencies USAF (Department of the Air Force)	$88,588	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
91	GMS International Corporation Top agencies DLA (Defense Logistics Agency)	$86,343	0.2%	Rank history: #44 in FY2022, #40 in FY2023, #3 in FY2024 and #31 in FY2025; down 27 since FY2020.
92	American Aerospace Controls Inc. Top agencies DLA (Defense Logistics Agency)	$86,112	0.2%	Rank history: not on the FY2022–FY2025 lists; up 373 since FY2020.
93	General Dynamics Corporation Through Electric Boat Corporation Top agencies Navy (Department of the Navy)	$85,289	0.2%	Rank history: not on the FY2022–FY2023 lists, #9 in FY2024 and not on the FY2025 list; down 12 since FY2020.
94	PSP Seals LLC Top agencies DLA (Defense Logistics Agency)	$84,214	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
95	Detmer Business Group Inc. Top agencies DLA (Defense Logistics Agency) VA (Department of Veterans Affairs)	$83,677	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
96	Bright Manufacturing LLC Top agencies DLA (Defense Logistics Agency)	$83,226	0.2%	Rank history: not on the FY2022–FY2025 lists; down 22 since FY2020.
97	FDH Defense Aftermarket, LLC Top agencies DLA (Defense Logistics Agency)	$80,622	0.2%	Rank history: not on the FY2022–FY2025 lists; up 31 since FY2020.
98	Larkos Packing and Distribution Inc. Top agencies DLA (Defense Logistics Agency)	$79,135	0.2%	Rank history: #84 in FY2022, #70 in FY2023, #45 in FY2024 and #83 in FY2025; up 51 since FY2020.
99	Wizard Technologies Inc. Top agencies DLA (Defense Logistics Agency)	$78,015	0.2%	Rank history: #75 in FY2022 and not on the FY2023–FY2025 lists; down 43 since FY2020.
100	Benchmark Connector Corporation Top agencies DLA (Defense Logistics Agency)	$77,980	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.

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100 of 570 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 $47.7 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 NAICS 334416 contractors in FY2021?

1. ECI Defense Group, Inc. ($4.75M), 2. Syqwest LLC ($1.53M), 3. Jo-Kell Inc. ($1.42M), 4. C E Niehoff & Co ($1.3M), 5. Berkshire Hathaway Inc. ($1.18M), 6. Ontic Engineering & Manufacturing, Inc. ($1.13M), 7. Jamaica Bearings Co., Inc. ($950K), 8. Advantest Corporation ($931K), 9. RTX Corporation ($905K), 10. Precision Electronics, Inc. ($862K).

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