Top 100 Contractors in NAICS 334418: Printed Circuit Assembly (Electronic Assembly) Manufacturing, FY2021

Name: Top 100 Contractors in NAICS 334418: Printed Circuit Assembly (Electronic Assembly) Manufacturing, FY2021
Creator: GovTribe

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

The top 10 won 30% of FY2021 NAICS 334418 contract dollars

Contract obligations: $45,924,330 Net of deobligations, by contracts coded NAICS 334418
Contractors: 398 Parent companies with an obligation
Largest contractor: Advance Circuit Technology, Inc. $2.27 million, 4.6% 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	Advance Circuit Technology, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army)	$2,273,713	4.6%	Rank history: #88 in FY2022, #100 in FY2023 and not on the FY2024–FY2025 lists; up 111 since FY2020.
2	Curtiss-Wright Corporation 3 awardees, including Curtiss-Wright DS, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army)	$1,745,128	3.5%	Rank history: #30 in FY2022, #3 in FY2023 and not on the FY2024–FY2025 lists; unchanged since FY2020.
3	Electrical Equipment Co Top agencies Navy (Department of the Navy)	$1,692,266	3.4%	Rank history: #31 in FY2022, #35 in FY2023, #12 in FY2024 and #14 in FY2025; new, not ranked in FY2020.
4	Lockheed Martin Corporation 3 awardees Top agencies DLA (Defense Logistics Agency)	$1,658,283	3.4%	Rank history: not on the FY2022 list, #77 in FY2023 and not on the FY2024–FY2025 lists; up 16 since FY2020.
5	Stratus Systems, Inc. Top agencies DLA (Defense Logistics Agency)	$1,452,179	2.9%	Rank history: #6 in FY2022, #8 in FY2023, #92 in FY2024 and not on the FY2025 list; up 10 since FY2020.
6	RTX Corporation 4 awardees, including Rockwell Collins, Inc. Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$1,398,764	2.8%	Rank history: #1 in FY2022, #6 in FY2023, #2 in FY2024 and #100 in FY2025; down 1 since FY2020.
7	Transdigm Group Incorporated 5 awardees, including Data Device Corp, Scioteq LLC and Transicoil LLC Top agencies NASA (National Aeronautics and Space Administration) Navy (Department of the Navy) USAF (Department of the Air Force)	$1,292,131	2.6%	Rank history: #22 in FY2022, #21 in FY2023 and not on the FY2024–FY2025 lists; down 3 since FY2020.
8	American Computer Development, Incorporated Top agencies Navy (Department of the Navy)	$1,155,921	2.3%	Rank history: #2 in FY2022, #55 in FY2023, #79 in FY2024 and #6 in FY2025; up 65 since FY2020.
9	Jamaica Bearings Co., Inc. Top agencies DLA (Defense Logistics Agency)	$1,138,213	2.3%	Rank history: #15 in FY2022, #7 in FY2023, #5 in FY2024 and #12 in FY2025; up 5 since FY2020.
10	Trimble Sustainment Engineering, Inc. Top agencies Navy (Department of the Navy)	$891,181	1.8%	Rank history: #48 in FY2022 and not on the FY2023–FY2025 lists; up 79 since FY2020.
11	The Board Room Inc. Top agencies Navy (Department of the Navy)	$792,552	1.6%	Rank history: #9 in FY2022, #39 in FY2023, #30 in FY2024 and not on the FY2025 list; up 15 since FY2020.
12	Ultra Electronics Forensic Technology Inc 2 awardees, including Caes Mission Systems LLC and Ems Development Corporation Top agencies DLA (Defense Logistics Agency)	$775,702	1.6%	Rank history: #17 in FY2022, #70 in FY2023, not on the FY2024 list and #90 in FY2025; new, not ranked in FY2020.
13	Ruta Supplies Inc. Top agencies DLA (Defense Logistics Agency)	$755,823	1.5%	Rank history: #32 in FY2022, #25 in FY2023, #40 in FY2024 and #49 in FY2025; up 22 since FY2020.
14	United Electronic Industries Services, LLC Top agencies Navy (Department of the Navy)	$748,880	1.5%	Rank history: not on the FY2022–FY2025 lists; up 10 since FY2020.
15	Jo-Kell Inc. Top agencies DLA (Defense Logistics Agency)	$724,239	1.5%	Rank history: #24 in FY2022, #20 in FY2023, #39 in FY2024 and #36 in FY2025; up 38 since FY2020.
16	BAE Systems PLC 4 awardees, including BAE Systems Land & Armaments L.P. Top agencies DLA (Defense Logistics Agency) Army (Department of the Army)	$716,745	1.4%	Rank history: #8 in FY2022, #1 in FY2023, #3 in FY2024 and #13 in FY2025; down 5 since FY2020.
17	Addon UBT JV, LLC Top agencies DOT (Department of Transportation)	$698,499	1.4%	Rank history: not on the FY2022–FY2025 lists; up 112 since FY2020.
18	Integrated Procurement Technologies Top agencies DLA (Defense Logistics Agency)	$682,250	1.4%	Rank history: #5 in FY2022, #18 in FY2023, #26 in FY2024 and #20 in FY2025; up 33 since FY2020.
19	Curtiss-Wright DS, Inc. Top agencies Navy (Department of the Navy)	$674,269	1.4%	Rank history: not on the FY2022–FY2023 lists, #11 in FY2024 and #15 in FY2025; new, not ranked in FY2020.
20	ECI Defense Group, Inc. Top agencies DLA (Defense Logistics Agency)	$663,711	1.3%	Rank history: #14 in FY2022, #10 in FY2023, #19 in FY2024 and #39 in FY2025; down 12 since FY2020.
21	Roselm Industries, Inc. Top agencies Navy (Department of the Navy)	$615,377	1.2%	Rank history: #40 in FY2022, #67 in FY2023, #42 in FY2024 and not on the FY2025 list; up 1 since FY2020.
22	Printed Circuits Corp. Top agencies Navy (Department of the Navy) DMEA (Defense Microelectronics Activity) DLA (Defense Logistics Agency)	$537,760	1.1%	Rank history: #45 in FY2022, #14 in FY2023, #28 in FY2024 and #43 in FY2025; up 26 since FY2020.
23	Triman Industries Inc. Top agencies DLA (Defense Logistics Agency)	$468,988	0.9%	Rank history: #16 in FY2022, #41 in FY2023, #16 in FY2024 and #24 in FY2025; up 33 since FY2020.
24	Blue Cord Logistic Strategies Inc. Top agencies DLA (Defense Logistics Agency)	$436,315	0.9%	Rank history: #28 in FY2022, #56 in FY2023, #53 in FY2024 and not on the FY2025 list; up 70 since FY2020.
25	Martin Military Inc. Top agencies DLA (Defense Logistics Agency)	$393,249	0.8%	Rank history: #33 in FY2022, #13 in FY2023, #36 in FY2024 and #31 in FY2025; up 36 since FY2020.
26	HDL Research Lab Inc. Top agencies Navy (Department of the Navy)	$392,424	0.8%	Rank history: not on the FY2022 list, #42 in FY2023, not on the FY2024 list and #17 in FY2025; new, not ranked in FY2020.
27	Teledevices LLC Top agencies DLA (Defense Logistics Agency)	$385,434	0.8%	Rank history: not on the FY2022 list, #88 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
28	Comperipherals Incorporated Top agencies DLA (Defense Logistics Agency)	$384,765	0.8%	Rank history: not on the FY2022–FY2023 lists, #45 in FY2024 and not on the FY2025 list; up 335 since FY2020.
29	The Bionetics Corp Top agencies Navy (Department of the Navy)	$381,960	0.8%	Rank history: #60 in FY2022 and not on the FY2023–FY2025 lists; up 164 since FY2020.
30	Kampi Components Co Inc. Top agencies DLA (Defense Logistics Agency)	$379,275	0.8%	Rank history: #29 in FY2022, #30 in FY2023, #22 in FY2024 and #10 in FY2025; up 8 since FY2020.
31	Aarcorp Through AAR Supply Chain, Inc. Top agencies DLA (Defense Logistics Agency)	$376,662	0.8%	Rank history: #23 in FY2022, #19 in FY2023 and not on the FY2024–FY2025 lists; up 1 since FY2020.
32	Phoenix Trading Inc. Top agencies DLA (Defense Logistics Agency)	$355,215	0.7%	Rank history: not on the FY2022–FY2025 lists; up 52 since FY2020.
33	Delta Group Electronics Inc. 2 awardees Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$344,283	0.7%	Rank history: not on the FY2022–FY2025 lists; up 26 since FY2020.
34	Jag Components, LLC Top agencies DLA (Defense Logistics Agency)	$336,730	0.7%	Rank history: not on the FY2022–FY2023 lists, #71 in FY2024 and #83 in FY2025; up 106 since FY2020.
35	Pioneer Industries, LLC Top agencies DHS (Department of Homeland Security) DLA (Defense Logistics Agency)	$308,751	0.6%	Rank history: #65 in FY2022, #80 in FY2023, not on the FY2024 list and #52 in FY2025; up 32 since FY2020.
36	Ametek Inc. Through Abaco Systems, Inc. Top agencies Commerce (Department of Commerce) Navy (Department of the Navy)	$307,549	0.6%	Rank history: #44 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
37	Testek LLC Top agencies DLA (Defense Logistics Agency)	$302,952	0.6%	Rank history: #63 in FY2022, #90 in FY2023, not on the FY2024 list and #89 in FY2025; up 3 since FY2020.
38	SSI Technology Inc. Top agencies DLA (Defense Logistics Agency) Army (Department of the Army)	$301,075	0.6%	Rank history: not on the FY2022 list, #2 in FY2023 and not on the FY2024–FY2025 lists; up 11 since FY2020.
39	Cobham Advanced Electronic Solutions Inc. 2 awardees, including Chelton Limited and Mission Systems Davenport Inc. Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$291,333	0.6%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
40	L3Harris Technologies, Inc. 7 awardees, including L3Harris Maritime Power & Energy Solutions, Inc. and L3 Technologies, Inc. Top agencies Army (Department of the Army) DHS (Department of Homeland Security)	$273,235	0.6%	Rank history: #46 in FY2022, #31 in FY2023 and not on the FY2024–FY2025 lists; down 6 since FY2020.
41	Cornet Technology, Inc. Top agencies DLA (Defense Logistics Agency)	$261,394	0.5%	Rank history: #41 in FY2022, #29 in FY2023, #33 in FY2024 and #34 in FY2025; up 33 since FY2020.
42	Marine Electric Systems Inc. Top agencies DLA (Defense Logistics Agency)	$260,696	0.5%	Rank history: not on the FY2022–FY2025 lists; up 15 since FY2020.
43	Transaero, Inc. Top agencies DLA (Defense Logistics Agency)	$260,105	0.5%	Rank history: #13 in FY2022, #24 in FY2023, #21 in FY2024 and #19 in FY2025; down 36 since FY2020.
44	The Boeing Company 2 awardees, including Argon ST, Inc. and Boeing Distribution, Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$257,038	0.5%	Rank history: #56 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
45	Alektronics Inc. Top agencies DLA (Defense Logistics Agency) Army (Department of the Army)	$253,319	0.5%	Rank history: #49 in FY2022 and not on the FY2023–FY2025 lists; down 15 since FY2020.
46	TE Connectivity Corporation Top agencies DLA (Defense Logistics Agency)	$232,210	0.5%	Rank history: #89 in FY2022, #68 in FY2023, #35 in FY2024 and not on the FY2025 list; up 56 since FY2020.
47	Ontic Engineering & Manufacturing, Inc. 2 awardees, including Centroid, Inc. Top agencies DLA (Defense Logistics Agency)	$230,086	0.5%	Rank history: #75 in FY2022, #66 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
48	Edel Engineering Development Co. Top agencies DLA (Defense Logistics Agency)	$230,061	0.5%	Rank history: #36 in FY2022, #69 in FY2023, not on the FY2024 list and #58 in FY2025; down 1 since FY2020.
49	Dynalec Corporation Top agencies DLA (Defense Logistics Agency)	$225,659	0.5%	Rank history: #35 in FY2022, #47 in FY2023, #54 in FY2024 and #22 in FY2025; up 1 since FY2020.
50	Dreamfind, Inc. Top agencies DLA (Defense Logistics Agency)	$225,071	0.5%	Rank history: #42 in FY2022, #73 in FY2023, #87 in FY2024 and not on the FY2025 list; up 64 since FY2020.
51	Buffalo Power Electronics Center, Inc. Top agencies DHS (Department of Homeland Security)	$221,643	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
52	Penn Detroit Diesel Allison LLC Through Penn Power Group LLC Top agencies DLA (Defense Logistics Agency)	$219,148	0.4%	Rank history: #73 in FY2022, #93 in FY2023 and not on the FY2024–FY2025 lists; up 138 since FY2020.
53	Noresco LLC Through Kidde Technologies, Inc. Top agencies DLA (Defense Logistics Agency)	$211,192	0.4%	Rank history: #34 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
54	Statz Corp Top agencies DLA (Defense Logistics Agency)	$206,692	0.4%	Rank history: #12 in FY2022 and not on the FY2023–FY2025 lists; down 17 since FY2020.
55	Unified Business Technologies, Inc. Top agencies Navy (Department of the Navy)	$202,171	0.4%	Rank history: #25 in FY2022, not on the FY2023 list, #10 in FY2024 and not on the FY2025 list; down 11 since FY2020.
56	Bogue Systems Inc. Top agencies DLA (Defense Logistics Agency)	$202,050	0.4%	Rank history: #58 in FY2022 and not on the FY2023–FY2025 lists; up 10 since FY2020.
57	Firan Technology Group Corporation Through FTG Aerospace Inc. Top agencies DLA (Defense Logistics Agency)	$199,060	0.4%	Rank history: not on the FY2022–FY2025 lists; up 128 since FY2020.
58	S3 International LLC Through S3 Aerodefense LLC Top agencies DLA (Defense Logistics Agency)	$197,786	0.4%	Rank history: #93 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
59	Leonardo S.p.A. 3 awardees, including Pivotal Power Inc., DRS Network & Imaging Systems LLC and DRS Training & Control Systems, LLC Top agencies DLA (Defense Logistics Agency) Army (Department of the Army)	$197,273	0.4%	Rank history: #7 in FY2022, #61 in FY2023, #1 in FY2024 and #8 in FY2025; down 20 since FY2020.
60	Synercom Inc Through Spectrum Associates, Inc. Top agencies DLA (Defense Logistics Agency)	$196,314	0.4%	Rank history: #47 in FY2022, #51 in FY2023 and not on the FY2024–FY2025 lists; up 79 since FY2020.
61	Disan Engineering Corp Top agencies DLA (Defense Logistics Agency)	$195,750	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
62	Mark Electronics Inc. Top agencies DLA (Defense Logistics Agency)	$189,702	0.4%	Rank history: not on the FY2022–FY2025 lists; up 19 since FY2020.
63	Global Logistics Strategies Inc. Top agencies DLA (Defense Logistics Agency)	$189,653	0.4%	Rank history: #79 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
64	BAE Systems Land & Armaments L.P. 2 awardees, including BAE Systems Controls Inc. Top agencies DLA (Defense Logistics Agency)	$178,325	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
65	Gdca, Inc. Top agencies Navy (Department of the Navy)	$177,005	0.4%	Rank history: #19 in FY2022 and not on the FY2023–FY2025 lists; up 36 since FY2020.
66	Basler Electric Company, LLC Top agencies DLA (Defense Logistics Agency)	$176,310	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
67	Dresser-Argus, Inc. Top agencies DLA (Defense Logistics Agency)	$175,721	0.4%	Rank history: not on the FY2022–FY2025 lists; up 108 since FY2020.
68	Johnson & Towers Inc. Top agencies DLA (Defense Logistics Agency)	$168,046	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
69	Heico Aerospace Corporat 3 awardees, including Seal Dynamics LLC and Sensor Technology Engineering LLC Top agencies DLA (Defense Logistics Agency) Army (Department of the Army)	$159,028	0.3%	Rank history: #76 in FY2022, #16 in FY2023, #49 in FY2024 and #53 in FY2025; down 44 since FY2020.
70	Linmarr Associates, Inc. Top agencies USAF (Department of the Air Force)	$156,241	0.3%	Rank history: not on the FY2022–FY2025 lists; up 154 since FY2020.
71	Fairmount Automation, Inc. Top agencies DLA (Defense Logistics Agency)	$155,947	0.3%	Rank history: #72 in FY2022, #43 in FY2023 and not on the FY2024–FY2025 lists; up 137 since FY2020.
72	Ducommun Incorporated Through Ducommun Labarge Technologies, Inc. Top agencies DLA (Defense Logistics Agency)	$155,039	0.3%	Rank history: #92 in FY2022, #76 in FY2023 and not on the FY2024–FY2025 lists; up 98 since FY2020.
73	Astra Products Co., Inc. of Tampa Top agencies DLA (Defense Logistics Agency)	$153,127	0.3%	Rank history: #20 in FY2022, #48 in FY2023, #93 in FY2024 and #51 in FY2025; up 72 since FY2020.
74	Axonvr Corporation Through Haptx, Inc. Top agencies Army (Department of the Army)	$152,600	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
75	Howe Machine & Tool Corp. Top agencies DLA (Defense Logistics Agency)	$146,147	0.3%	Rank history: #37 in FY2022, #82 in FY2023 and not on the FY2024–FY2025 lists; up 12 since FY2020.
76	Par Defense Industries, LLC Top agencies DLA (Defense Logistics Agency)	$142,204	0.3%	Rank history: not on the FY2022 list, #94 in FY2023, not on the FY2024 list and #38 in FY2025; up 16 since FY2020.
77	Albuquerque L&L Electronics Inc. Top agencies USAF (Department of the Air Force)	$140,625	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
78	Lynn Electronics LLC Top agencies DLA (Defense Logistics Agency)	$140,552	0.3%	Rank history: not on the FY2022–FY2025 lists; up 17 since FY2020.
79	Empire Avionics Corp. Top agencies DLA (Defense Logistics Agency)	$139,531	0.3%	Rank history: not on the FY2022–FY2025 lists; down 24 since FY2020.
80	Mercury Computer Systems Inc. 2 awardees, including Mercury Systems Inc. Top agencies Navy (Department of the Navy)	$137,492	0.3%	Rank history: not on the FY2022 list, #85 in FY2023 and not on the FY2024–FY2025 lists; up 27 since FY2020.
81	Annapolis Micro Systems, Inc. Top agencies Navy (Department of the Navy)	$137,112	0.3%	Rank history: not on the FY2022 list, #89 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
82	JA Moody LLC Top agencies DLA (Defense Logistics Agency)	$129,930	0.3%	Rank history: not on the FY2022–FY2024 lists and #50 in FY2025; down 49 since FY2020.
83	Omega Business Systems LLC Top agencies Navy (Department of the Navy)	$129,303	0.3%	Rank history: not on the FY2022 list, #60 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
84	Rocker Solenoid Co Top agencies DLA (Defense Logistics Agency)	$125,104	0.3%	Rank history: not on the FY2022–FY2023 lists, #32 in FY2024 and #46 in FY2025; up 41 since FY2020.
85	Wyvern Technologies Top agencies DLA (Defense Logistics Agency)	$122,200	0.2%	Rank history: not on the FY2022–FY2025 lists; up 11 since FY2020.
86	Trandes Corp Top agencies DLA (Defense Logistics Agency)	$121,579	0.2%	Rank history: #55 in FY2022 and not on the FY2023–FY2025 lists; up 41 since FY2020.
87	Cavanaugh Government Group, LLC Top agencies DLA (Defense Logistics Agency)	$121,265	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
88	Woodard Electric Inc. Top agencies DLA (Defense Logistics Agency)	$120,258	0.2%	Rank history: not on the FY2022–FY2025 lists; up 35 since FY2020.
89	Spectrum Laser & Technologies Inc. Top agencies Navy (Department of the Navy)	$118,894	0.2%	Rank history: not on the FY2022–FY2025 lists; down 35 since FY2020.
90	Associated Aircraft Manufacturing & Sales, Inc. Top agencies DLA (Defense Logistics Agency)	$118,149	0.2%	Rank history: #59 in FY2022, #9 in FY2023, not on the FY2024 list and #9 in FY2025; down 12 since FY2020.
91	Critical Solutions International, LLC Top agencies DLA (Defense Logistics Agency)	$117,978	0.2%	Rank history: not on the FY2022–FY2025 lists; up 72 since FY2020.
92	Brighton Cromwell LLC Top agencies DLA (Defense Logistics Agency)	$117,244	0.2%	Rank history: not on the FY2022–FY2025 lists; down 74 since FY2020.
93	Am-Mac Incorporated Top agencies DLA (Defense Logistics Agency)	$116,714	0.2%	Rank history: not on the FY2022–FY2025 lists; up 245 since FY2020.
94	Rex Systems Incorporated Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$115,962	0.2%	Rank history: not on the FY2022–FY2023 lists, #98 in FY2024 and #84 in FY2025; down 34 since FY2020.
95	Centroid, Inc. Top agencies DLA (Defense Logistics Agency)	$113,619	0.2%	Rank history: not on the FY2022–FY2023 lists, #50 in FY2024 and #47 in FY2025; down 24 since FY2020.
96	BAE Systems Information and Electronic Systems Integration Inc. Top agencies DLA (Defense Logistics Agency)	$112,340	0.2%	Rank history: #18 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
97	NPI Services, Inc. Top agencies Navy (Department of the Navy)	$111,450	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
98	Artemis Electronics LLC Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$110,266	0.2%	Rank history: #66 in FY2022 and not on the FY2023–FY2025 lists; up 17 since FY2020.
99	FCG Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$109,078	0.2%	Rank history: not on the FY2022–FY2025 lists; up 62 since FY2020.
100	S I T Corporation Top agencies DLA (Defense Logistics Agency)	$108,655	0.2%	Rank history: #96 in FY2022, #38 in FY2023, #82 in FY2024 and #35 in FY2025; down 57 since FY2020.

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100 of 398 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 $49.5 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 334418 contractors in FY2021?

1. Advance Circuit Technology, Inc. ($2.27M), 2. Curtiss-Wright Corporation ($1.75M), 3. Electrical Equipment Co ($1.69M), 4. Lockheed Martin Corporation ($1.66M), 5. Stratus Systems, Inc. ($1.45M), 6. RTX Corporation ($1.4M), 7. Transdigm Group Incorporated ($1.29M), 8. American Computer Development, Incorporated ($1.16M), 9. Jamaica Bearings Co., Inc. ($1.14M), 10. Trimble Sustainment Engineering, Inc. ($891K).

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