Top 100 Contractors in NAICS 335313: Switchgear and Switchboard Apparatus Manufacturing, FY2021

Name: Top 100 Contractors in NAICS 335313: Switchgear and Switchboard Apparatus Manufacturing, FY2021
Creator: GovTribe

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

The top 10 won 43% of FY2021 NAICS 335313 contract dollars

Contract obligations: $71,909,256 Net of deobligations, by contracts coded NAICS 335313
Contractors: 564 Parent companies with an obligation
Largest contractor: Leonardo S.p.A. $7.36 million, 9.6% 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	Leonardo S.p.A. 4 awardees, including DRS Naval Power Systems Inc., DRS Systems, Inc. and DRS Network & Imaging Systems LLC Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$7,363,549	9.6%	Rank history: #13 in FY2022, #79 in FY2023, #12 in FY2024 and #4 in FY2025; new, not ranked in FY2020.
2	Argo Systems, LLC Top agencies Navy (Department of the Navy)	$4,927,412	6.4%	Rank history: #12 in FY2022 and not on the FY2023–FY2025 lists; unchanged since FY2020.
3	Koontz Electric Company, Incorporated Top agencies Army (Department of the Army)	$4,198,834	5.5%	Rank history: #11 in FY2022, #5 in FY2023, not on the FY2024 list and #10 in FY2025; up 1 since FY2020.
4	Lynn / Cornerstone Holdings, LLC Through Gracon LLC Top agencies Army (Department of the Army)	$3,587,409	4.7%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
5	R. S. Means Company LLC 2 awardees, including Fluke Corp and Setra Systems, Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$3,116,037	4.1%	Rank history: not on the FY2022–FY2025 lists; up 262 since FY2020.
6	Ricardo Perez S.a. Through Olsson Industrial Electric, Inc. Top agencies Army (Department of the Army)	$2,673,187	3.5%	Rank history: not on the FY2022–FY2025 lists; down 5 since FY2020.
7	Jo-Kell Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$2,603,745	3.4%	Rank history: #1 in FY2022, #1 in FY2023, #2 in FY2024 and #2 in FY2025; down 4 since FY2020.
8	Murray Benjamin Electric Company LLC Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$1,649,197	2.1%	Rank history: #4 in FY2022, #2 in FY2023, #4 in FY2024 and #26 in FY2025; down 1 since FY2020.
9	Transdigm Group Incorporated 4 awardees, including Mason Electric Co., Janco Corporation and Aerocontrolex Group, Inc. Top agencies DLA (Defense Logistics Agency) Army (Department of the Army)	$1,578,779	2.1%	Rank history: #17 in FY2022, #21 in FY2023 and not on the FY2024–FY2025 lists; up 327 since FY2020.
10	G & RK Consulting Associates LLC Top agencies DOE (Department of Energy)	$1,457,642	1.9%	Rank history: #3 in FY2022, #4 in FY2023, #34 in FY2024 and #6 in FY2025; down 5 since FY2020.
11	Burke Electric, L.L.C. Top agencies DOI (Department of the Interior)	$1,367,931	1.8%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
12	L3Harris Technologies, Inc. 8 awardees, including L3Harris Maritime Power & Energy Solutions, Inc., L3 Technologies, Inc. and CAE USA Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$1,098,099	1.4%	Rank history: not on the FY2022 list, #9 in FY2023, #25 in FY2024 and #8 in FY2025; down 3 since FY2020.
13	Custom Manufacturing & Engineering, Inc. Top agencies Navy (Department of the Navy)	$1,037,472	1.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
14	Dynalec Corporation Top agencies DLA (Defense Logistics Agency)	$1,004,197	1.3%	Rank history: #24 in FY2022, #24 in FY2023, not on the FY2024 list and #24 in FY2025; up 9 since FY2020.
15	DVM Manufacturing LLC Top agencies Commerce (Department of Commerce)	$986,167	1.3%	Rank history: not on the FY2022–FY2025 lists; down 3 since FY2020.
16	Science Applications International Corporation Through Asrc Federal Facilities Logistics, LLC Top agencies DLA (Defense Logistics Agency)	$845,623	1.1%	Rank history: #51 in FY2022, #15 in FY2023 and not on the FY2024–FY2025 lists; up 1 since FY2020.
17	FBC Enterprises LLC Top agencies DLA (Defense Logistics Agency)	$842,063	1.1%	Rank history: #57 in FY2022, #11 in FY2023, #18 in FY2024 and #65 in FY2025; up 28 since FY2020.
18	Peerless Electronics Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$795,862	1.0%	Rank history: #15 in FY2022, #13 in FY2023, #6 in FY2024 and #11 in FY2025; down 8 since FY2020.
19	Fromm Electric Supply of Reading, Penna., LLC Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$771,325	1.0%	Rank history: #9 in FY2022, #18 in FY2023, #46 in FY2024 and #19 in FY2025; up 5 since FY2020.
20	Faith Enterprises Incorporated Top agencies Commerce (Department of Commerce)	$723,592	0.9%	Rank history: not on the FY2022 list, #23 in FY2023, #23 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
21	Esco Technologies Inc. Through Globe Composite Solutions, LLC Top agencies Navy (Department of the Navy)	$696,867	0.9%	Rank history: #23 in FY2022, #52 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
22	Marine Air Supply Co., Inc. Top agencies DLA (Defense Logistics Agency)	$622,451	0.8%	Rank history: #16 in FY2022, #26 in FY2023, #33 in FY2024 and #81 in FY2025; down 6 since FY2020.
23	Whipp & Bourne Associates LLC Top agencies Navy (Department of the Navy)	$601,790	0.8%	Rank history: #10 in FY2022, #61 in FY2023, #64 in FY2024 and not on the FY2025 list; up 33 since FY2020.
24	Dutch Valley Supply Co. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$580,547	0.8%	Rank history: #8 in FY2022, #12 in FY2023, #16 in FY2024 and #17 in FY2025; up 5 since FY2020.
25	Lockheed Martin Corporation 7 awardees, including Lockheed Martin Sippican, Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$575,283	0.7%	Rank history: #28 in FY2022, #40 in FY2023 and not on the FY2024–FY2025 lists; up 28 since FY2020.
26	RTX Corporation 2 awardees, including Raytheon Company Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$574,125	0.7%	Rank history: not on the FY2022–FY2025 lists; up 120 since FY2020.
27	Sigma-Netics, Inc. Top agencies DLA (Defense Logistics Agency)	$515,829	0.7%	Rank history: #18 in FY2022, #28 in FY2023, #45 in FY2024 and #16 in FY2025; unchanged since FY2020.
28	Triman Industries Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$467,674	0.6%	Rank history: #26 in FY2022, #96 in FY2023, #39 in FY2024 and #5 in FY2025; down 20 since FY2020.
29	Crane Co Through Eldec Aerospace Corp Top agencies DLA (Defense Logistics Agency)	$467,327	0.6%	Rank history: #6 in FY2022, #10 in FY2023, #40 in FY2024 and not on the FY2025 list; down 14 since FY2020.
30	R & M Government Services Inc. Top agencies DLA (Defense Logistics Agency)	$406,022	0.5%	Rank history: #71 in FY2022, #53 in FY2023, #28 in FY2024 and #32 in FY2025; up 27 since FY2020.
31	Synergetic Technologies Group, Inc. Top agencies DLA (Defense Logistics Agency)	$384,000	0.5%	Rank history: not on the FY2022–FY2024 lists and #93 in FY2025; new, not ranked in FY2020.
32	Ultrax Aerospace Inc. Top agencies Army (Department of the Army)	$364,022	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
33	Circuit Media LLC Top agencies DOE (Department of Energy)	$361,221	0.5%	Rank history: not on the FY2022 list, #32 in FY2023, #62 in FY2024 and not on the FY2025 list; down 14 since FY2020.
34	Ultra Electronics Forensic Technology Inc Through Ems Development Corporation Top agencies Navy (Department of the Navy)	$345,000	0.4%	Rank history: #19 in FY2022, #22 in FY2023 and not on the FY2024–FY2025 lists; up 317 since FY2020.
35	Epsilon Systems Solutions, Inc. Top agencies Navy (Department of the Navy)	$343,829	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
36	Kampi Components Co Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$329,003	0.4%	Rank history: #22 in FY2022, #29 in FY2023, #10 in FY2024 and #29 in FY2025; up 4 since FY2020.
37	Powell Electronics, Inc. Top agencies Army (Department of the Army)	$323,657	0.4%	Rank history: #34 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
38	QPI Pro, Inc. Top agencies DLA (Defense Logistics Agency)	$317,143	0.4%	Rank history: #32 in FY2022 and not on the FY2023–FY2025 lists; up 189 since FY2020.
39	Electrical Products Sales Corp. Top agencies DLA (Defense Logistics Agency)	$317,102	0.4%	Rank history: #21 in FY2022, #35 in FY2023, #29 in FY2024 and #22 in FY2025; down 13 since FY2020.
40	Pioneer Industries, LLC Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$315,467	0.4%	Rank history: #58 in FY2022, not on the FY2023 list, #96 in FY2024 and #55 in FY2025; up 33 since FY2020.
41	Electro Enterprises Inc. Top agencies DLA (Defense Logistics Agency)	$315,370	0.4%	Rank history: #44 in FY2022, #45 in FY2023, #69 in FY2024 and not on the FY2025 list; up 51 since FY2020.
42	Mary Helen Parkey Top agencies Navy (Department of the Navy)	$305,955	0.4%	Rank history: #46 in FY2022, not on the FY2023 list, #52 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
43	SSI Technology Inc. Top agencies DLA (Defense Logistics Agency)	$286,500	0.4%	Rank history: #97 in FY2022, not on the FY2023 list, #36 in FY2024 and #43 in FY2025; down 25 since FY2020.
44	Ruta Supplies Inc. Top agencies DLA (Defense Logistics Agency)	$279,334	0.4%	Rank history: #25 in FY2022, #25 in FY2023 and not on the FY2024–FY2025 lists; up 96 since FY2020.
45	Northrop Grumman Corporation 4 awardees, including Northrop Grumman Systems Corporation Top agencies DLA (Defense Logistics Agency)	$269,014	0.4%	Rank history: #2 in FY2022, #3 in FY2023, #1 in FY2024 and #1 in FY2025; up 62 since FY2020.
46	Eaton Corporation 7 awardees Top agencies Army (Department of the Army) Navy (Department of the Navy) HHS (Department of Health and Human Services)	$267,273	0.3%	Rank history: #33 in FY2022, #6 in FY2023 and not on the FY2024–FY2025 lists; down 32 since FY2020.
47	Applied Controls Inc. Top agencies Navy (Department of the Navy)	$257,040	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
48	Way Point Commercial Broker L.l.c Top agencies USAF (Department of the Air Force)	$256,004	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
49	Royal Switchgear Manufacturing Company, LLC Top agencies DOE (Department of Energy)	$255,920	0.3%	Rank history: not on the FY2022–FY2023 lists, #8 in FY2024 and not on the FY2025 list; up 51 since FY2020.
50	Lex Products, LLC Top agencies DLA (Defense Logistics Agency)	$253,126	0.3%	Rank history: not on the FY2022 list, #42 in FY2023 and not on the FY2024–FY2025 lists; down 37 since FY2020.
51	Global Logistics Strategies Inc. Top agencies DLA (Defense Logistics Agency)	$250,309	0.3%	Rank history: not on the FY2022 list, #62 in FY2023, #92 in FY2024 and #37 in FY2025; down 23 since FY2020.
52	Nag, LLC Top agencies DLA (Defense Logistics Agency)	$242,990	0.3%	Rank history: not on the FY2022–FY2025 lists; up 320 since FY2020.
53	Arthur'S Enterprises Inc. Through State Electric Supply Co Top agencies DOJ (Department of Justice)	$238,481	0.3%	Rank history: not on the FY2022–FY2025 lists; up 5 since FY2020.
54	Veteran Owned Power & Solutions, LLC Top agencies Army (Department of the Army)	$228,448	0.3%	Rank history: #39 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
55	New IEM Power Systems LLC Top agencies USAF (Department of the Air Force)	$226,483	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
56	SAFRAN 2 awardees, including Safran Power Usa, LLC and Safran Electrical Components Canada Inc. Top agencies DLA (Defense Logistics Agency)	$221,281	0.3%	Rank history: not on the FY2022–FY2025 lists; down 22 since FY2020.
57	MR Sandman Inc. Top agencies Navy (Department of the Navy)	$220,608	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
58	Empire Avionics Corp. Top agencies DLA (Defense Logistics Agency)	$219,009	0.3%	Rank history: #84 in FY2022, #92 in FY2023, #21 in FY2024 and #42 in FY2025; down 9 since FY2020.
59	Hitachi, Ltd. Through Hitachi Energy USA Inc. Top agencies Army (Department of the Army)	$216,568	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
60	S.w. Electronics & Manufacturing Corp. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$213,040	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
61	Flowserve Corporation Top agencies Navy (Department of the Navy)	$212,904	0.3%	Rank history: #69 in FY2022, #50 in FY2023, #95 in FY2024 and not on the FY2025 list; up 346 since FY2020.
62	Marine Electric Systems Inc. Top agencies DLA (Defense Logistics Agency)	$210,480	0.3%	Rank history: not on the FY2022–FY2025 lists; down 42 since FY2020.
63	The Boeing Company 3 awardees, including Boeing Distribution Services, Inc., Boeing Distribution, Inc. and Boeing Distribution Services X, Inc. Top agencies DLA (Defense Logistics Agency)	$210,140	0.3%	Rank history: #53 in FY2022, #59 in FY2023 and not on the FY2024–FY2025 lists; up 27 since FY2020.
64	Advance Electrical Supply Co, Inc. Top agencies DOJ (Department of Justice)	$200,000	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
65	Aljers LLC Top agencies DLA (Defense Logistics Agency)	$192,400	0.3%	Rank history: not on the FY2022–FY2025 lists; up 20 since FY2020.
66	S I T Corporation Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) DHS (Department of Homeland Security)	$191,922	0.2%	Rank history: not on the FY2022–FY2023 lists, #42 in FY2024 and #44 in FY2025; down 12 since FY2020.
67	Metro Reliable Resources Corp. Top agencies DLA (Defense Logistics Agency)	$187,548	0.2%	Rank history: not on the FY2022–FY2025 lists; up 61 since FY2020.
68	Automated Business Power, Inc. Top agencies USAF (Department of the Air Force)	$184,426	0.2%	Rank history: not on the FY2022–FY2025 lists; up 38 since FY2020.
69	Hydra-Electric Company Top agencies DLA (Defense Logistics Agency)	$183,563	0.2%	Rank history: #43 in FY2022, #46 in FY2023, not on the FY2024 list and #49 in FY2025; down 7 since FY2020.
70	A & S Skill Machinists, Inc. Top agencies DLA (Defense Logistics Agency)	$176,885	0.2%	Rank history: not on the FY2022–FY2025 lists; up 386 since FY2020.
71	Ares Energy LP Top agencies USAGM (US Agency for Global Media)	$176,184	0.2%	Rank history: not on the FY2022–FY2025 lists; down 25 since FY2020.
72	Powergen Controls LLC Top agencies DHS (Department of Homeland Security)	$174,356	0.2%	Rank history: not on the FY2022–FY2025 lists; down 66 since FY2020.
73	Detroit Switch Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$173,196	0.2%	Rank history: #38 in FY2022, #56 in FY2023, #44 in FY2024 and #78 in FY2025; down 7 since FY2020.
74	Synercom Inc Through Spectrum Associates, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$169,693	0.2%	Rank history: #35 in FY2022, #38 in FY2023, #94 in FY2024 and not on the FY2025 list; down 30 since FY2020.
75	Cobham Advanced Electronic Solutions Inc. 2 awardees, including Caes Systems LLC and Mission Systems Davenport Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$167,282	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
76	M Davis & Sons Inc. Top agencies Navy (Department of the Navy)	$166,575	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
77	Argo Turboserve Corporation Top agencies DLA (Defense Logistics Agency)	$160,432	0.2%	Rank history: #41 in FY2022, #60 in FY2023, #56 in FY2024 and not on the FY2025 list; down 2 since FY2020.
78	Schneider Electric Buildings Americas Inc. 4 awardees, including Schneider Electric Usa, Inc. and Asco Power Services Inc. Top agencies DOJ (Department of Justice) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$156,910	0.2%	Rank history: #79 in FY2022 and not on the FY2023–FY2025 lists; up 32 since FY2020.
79	Confederated Salish and Kootenai Tribes Through S & K Logistics Services LLC Top agencies DLA (Defense Logistics Agency)	$154,559	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
80	D & W Marine Systems Management Inc. Top agencies DLA (Defense Logistics Agency)	$148,214	0.2%	Rank history: not on the FY2022–FY2023 lists, #73 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
81	Dillon Aero, Inc. Top agencies DLA (Defense Logistics Agency)	$146,570	0.2%	Rank history: not on the FY2022–FY2025 lists; up 222 since FY2020.
82	Transaero, Inc. Top agencies DLA (Defense Logistics Agency)	$141,769	0.2%	Rank history: not on the FY2022 list, #27 in FY2023, #63 in FY2024 and #9 in FY2025; new, not ranked in FY2020.
83	Lynn Electronics LLC Top agencies DLA (Defense Logistics Agency)	$139,632	0.2%	Rank history: #99 in FY2022 and not on the FY2023–FY2025 lists; down 6 since FY2020.
84	Janels Industries Inc. Top agencies DLA (Defense Logistics Agency)	$136,125	0.2%	Rank history: not on the FY2022 list, #33 in FY2023, #11 in FY2024 and #15 in FY2025; up 67 since FY2020.
85	Aponte Power Services LLC Top agencies Army (Department of the Army)	$135,710	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
86	Adirondack Electronics Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$134,326	0.2%	Rank history: #66 in FY2022, #68 in FY2023, not on the FY2024 list and #72 in FY2025; down 54 since FY2020.
87	CME Arma, Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$133,063	0.2%	Rank history: not on the FY2022–FY2025 lists; up 407 since FY2020.
88	Arctic Slope Regional Corporation Through Asrc Federal Facilities Logistics, LLC Top agencies Navy (Department of the Navy)	$132,098	0.2%	Rank history: not on the FY2022–FY2023 lists, #59 in FY2024 and #85 in FY2025; up 394 since FY2020.
89	Flame Enterprises, Inc. Top agencies DLA (Defense Logistics Agency)	$130,570	0.2%	Rank history: #74 in FY2022, not on the FY2023–FY2024 lists and #68 in FY2025; down 19 since FY2020.
90	Shiloh Industries Inc. Top agencies DLA (Defense Logistics Agency)	$130,000	0.2%	Rank history: not on the FY2022–FY2024 lists and #69 in FY2025; down 11 since FY2020.
91	TNL Sales LLC Top agencies DLA (Defense Logistics Agency)	$127,241	0.2%	Rank history: #82 in FY2022, not on the FY2023–FY2024 lists and #34 in FY2025; down 23 since FY2020.
92	Honeywell International Inc. 2 awardees Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$125,532	0.2%	Rank history: #63 in FY2022 and not on the FY2023–FY2025 lists; down 20 since FY2020.
93	Jolen Services, Inc. Top agencies DLA (Defense Logistics Agency)	$125,132	0.2%	Rank history: not on the FY2022 list, #70 in FY2023, #58 in FY2024 and #56 in FY2025; down 42 since FY2020.
94	Aero Defense Logistics LLC Top agencies DLA (Defense Logistics Agency)	$125,126	0.2%	Rank history: not on the FY2022–FY2025 lists; up 287 since FY2020.
95	Electro-Line Inc. Top agencies DLA (Defense Logistics Agency)	$119,416	0.2%	Rank history: #60 in FY2022, #99 in FY2023, #77 in FY2024 and not on the FY2025 list; down 45 since FY2020.
96	Dela Technology Corporation Top agencies DLA (Defense Logistics Agency)	$118,113	0.2%	Rank history: not on the FY2022–FY2025 lists; down 49 since FY2020.
97	D.l. Martin Co. Top agencies Navy (Department of the Navy)	$115,925	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
98	Electro Switch Corp. Top agencies Navy (Department of the Navy)	$115,700	0.2%	Rank history: not on the FY2022–FY2025 lists; down 27 since FY2020.
99	Martin Military Inc. Top agencies DLA (Defense Logistics Agency)	$114,924	0.1%	Rank history: #52 in FY2022, not on the FY2023–FY2024 lists and #64 in FY2025; up 6 since FY2020.
100	Madison Electric Co Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$113,716	0.1%	Rank history: #89 in FY2022, #86 in FY2023, #82 in FY2024 and #58 in FY2025; down 35 since FY2020.

Show 75 more

100 of 564 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 $76.9 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 335313 contractors in FY2021?

1. Leonardo S.p.A. ($7.36M), 2. Argo Systems, LLC ($4.93M), 3. Koontz Electric Company, Incorporated ($4.2M), 4. Lynn / Cornerstone Holdings, LLC ($3.59M), 5. R. S. Means Company LLC ($3.12M), 6. Ricardo Perez S.a. ($2.67M), 7. Jo-Kell Inc. ($2.6M), 8. Murray Benjamin Electric Company LLC ($1.65M), 9. Transdigm Group Incorporated ($1.58M), 10. G & RK Consulting Associates LLC ($1.46M).

On GovTribe

Research every contractor on this list

Every contract, task order and IDV they hold
Their subsidiaries, teammates and competitors
Open opportunities they're positioned for
Alerts when they win new work

Try for free Login