Top 100 Contractors in NAICS 334512: Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use, FY2021

Name: Top 100 Contractors in NAICS 334512: Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use, FY2021
Creator: GovTribe

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

The top 10 won 74% of FY2021 NAICS 334512 contract dollars

Contract obligations: $67,717,306 Net of deobligations, by contracts coded NAICS 334512
Contractors: 374 Parent companies with an obligation
Largest contractor: System High Corporation $26.5 million, 38.2% 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	System High Corporation Top agencies DARPA (Defense Advanced Research Projects Agency) OSD (Office of the Secretary of Defense) USAF (Department of the Air Force)	$26,492,468	38.2%	Rank history: #6 in FY2022, #5 in FY2023, #3 in FY2024 and #5 in FY2025; unchanged since FY2020.
2	Signet Technologies Inc. 2 awardees, including Convergint Technologies LLC Top agencies AOUSC (Administrative Office of the U.S. Courts) DHS (Department of Homeland Security) DHA (Defense Health Agency)	$15,237,114	22.0%	Rank history: #1 in FY2022, #1 in FY2023, #1 in FY2024 and #2 in FY2025; unchanged since FY2020.
3	Finishing Systems Inc. Top agencies Army (Department of the Army)	$2,283,150	3.3%	Rank history: not on the FY2022 list, #55 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
4	Veyka Insaat Mimarlik Muhendislik Sanayi IC VE Dis Ticaret Anonim Sirketi Top agencies DOS (Department of State)	$1,580,317	2.3%	Rank history: #53 in FY2022, not on the FY2023 list, #76 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
5	Cam-Dex Corporation Top agencies HHS (Department of Health and Human Services) Army (Department of the Army) USAF (Department of the Air Force)	$1,259,823	1.8%	Rank history: #9 in FY2022, #9 in FY2023, #4 in FY2024 and #13 in FY2025; down 2 since FY2020.
6	Utility Systems Solutions, Inc. Top agencies VA (Department of Veterans Affairs)	$1,036,462	1.5%	Rank history: #18 in FY2022, #8 in FY2023, #13 in FY2024 and #9 in FY2025; up 5 since FY2020.
7	Argo Turboserve Corporation Top agencies DLA (Defense Logistics Agency)	$989,730	1.4%	Rank history: #12 in FY2022, #17 in FY2023, #22 in FY2024 and #14 in FY2025; up 13 since FY2020.
8	Siemens Aktiengesellschaft Through Siemens Industry Inc. Top agencies DOS (Department of State) USDA (Department of Agriculture) USAF (Department of the Air Force)	$895,579	1.3%	Rank history: #39 in FY2022, #44 in FY2023 and not on the FY2024–FY2025 lists; up 137 since FY2020.
9	Johnson Controls Security Solutions LLC 8 awardees, including Johnson Controls Fire Protection LP, Johnson Controls, Inc. and Johnson Controls Navy Systems, LLC Top agencies DOJ (Department of Justice) DHA (Defense Health Agency) DLA (Defense Logistics Agency)	$773,201	1.1%	Rank history: #2 in FY2022, #23 in FY2023, #33 in FY2024 and #31 in FY2025; up 19 since FY2020.
10	Kampi Components Co Inc. Top agencies DLA (Defense Logistics Agency)	$410,334	0.6%	Rank history: #17 in FY2022, #26 in FY2023, #24 in FY2024 and #11 in FY2025; up 12 since FY2020.
11	APL Access & Security, Inc. Top agencies DHS (Department of Homeland Security) USAF (Department of the Air Force) Army (Department of the Army)	$399,372	0.6%	Rank history: not on the FY2022–FY2023 lists, #52 in FY2024 and #70 in FY2025; up 57 since FY2020.
12	Jamaica Bearings Co., Inc. Top agencies DLA (Defense Logistics Agency)	$399,115	0.6%	Rank history: #21 in FY2022, #19 in FY2023, #29 in FY2024 and #6 in FY2025; up 7 since FY2020.
13	Windward Enterprises, LLC Top agencies DLA (Defense Logistics Agency)	$392,158	0.6%	Rank history: #26 in FY2022, #11 in FY2023, #41 in FY2024 and #59 in FY2025; unchanged since FY2020.
14	Integrated Procurement Technologies Top agencies DLA (Defense Logistics Agency)	$363,910	0.5%	Rank history: not on the FY2022–FY2025 lists; up 119 since FY2020.
15	MMC Metrology Lab, Inc. Top agencies DLA (Defense Logistics Agency)	$357,225	0.5%	Rank history: #27 in FY2022, #22 in FY2023, #23 in FY2024 and #12 in FY2025; up 20 since FY2020.
16	Security & Energy Technologies Corporation Top agencies Army (Department of the Army) DOJ (Department of Justice) USDA (Department of Agriculture)	$351,756	0.5%	Rank history: #38 in FY2022, #33 in FY2023, #53 in FY2024 and #37 in FY2025; up 24 since FY2020.
17	Ldia Holdings, LLC Top agencies USAF (Department of the Air Force)	$350,033	0.5%	Rank history: #4 in FY2022, #25 in FY2023, #19 in FY2024 and #23 in FY2025; down 9 since FY2020.
18	Bluefors OY Top agencies NASA (National Aeronautics and Space Administration)	$349,700	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
19	AES Systems Inc. Top agencies GSA (General Services Administration) Army (Department of the Army)	$326,351	0.5%	Rank history: #65 in FY2022, #10 in FY2023 and not on the FY2024–FY2025 lists; up 61 since FY2020.
20	Kulite Semiconductor Products Inc. Top agencies DLA (Defense Logistics Agency)	$321,328	0.5%	Rank history: #33 in FY2022, #24 in FY2023, #11 in FY2024 and #55 in FY2025; up 7 since FY2020.
21	SRA International Inc. Through General Dynamics Information Technology, Inc. Top agencies DHS (Department of Homeland Security)	$314,535	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
22	Trillamed LLC Top agencies VA (Department of Veterans Affairs)	$300,182	0.4%	Rank history: not on the FY2022–FY2024 lists and #48 in FY2025; up 56 since FY2020.
23	Martin Military Inc. Top agencies DLA (Defense Logistics Agency)	$291,181	0.4%	Rank history: #29 in FY2022, not on the FY2023 list, #82 in FY2024 and #67 in FY2025; up 194 since FY2020.
24	Albireo Energy LLC 2 awardees, including Alabama Controls, Inc. and Advanced Power Control Inc. Top agencies Army (Department of the Army) DOJ (Department of Justice) DOS (Department of State)	$288,008	0.4%	Rank history: #28 in FY2022, #50 in FY2023 and not on the FY2024–FY2025 lists; down 15 since FY2020.
25	Transdigm Group Incorporated 3 awardees, including Harcosemco LLC, Mason Electric Co. and Semco Instruments, Inc. Top agencies DLA (Defense Logistics Agency)	$276,777	0.4%	Rank history: #49 in FY2022, #18 in FY2023, #72 in FY2024 and not on the FY2025 list; up 32 since FY2020.
26	Laurus Systems Inc. Top agencies HHS (Department of Health and Human Services) Army (Department of the Army) USAF (Department of the Air Force)	$275,106	0.4%	Rank history: #31 in FY2022, #34 in FY2023, #10 in FY2024 and #4 in FY2025; down 8 since FY2020.
27	Krismark Group, Inc. Through LKD Aerospace, LLC Top agencies DLA (Defense Logistics Agency)	$271,175	0.4%	Rank history: #13 in FY2022, #76 in FY2023, #56 in FY2024 and not on the FY2025 list; up 88 since FY2020.
28	Paragon Robotics LLC Top agencies HHS (Department of Health and Human Services)	$266,367	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
29	Honeywell Limited Through Honeywell Aerospace International Inc. Top agencies DLA (Defense Logistics Agency)	$264,224	0.4%	Rank history: not on the FY2022 list, #81 in FY2023 and not on the FY2024–FY2025 lists; up 64 since FY2020.
30	Midwest Security Services, Inc. Top agencies DOJ (Department of Justice) VA (Department of Veterans Affairs)	$264,006	0.4%	Rank history: not on the FY2022–FY2024 lists and #30 in FY2025; new, not ranked in FY2020.
31	Moeller Instrument Company, Inc. Top agencies DLA (Defense Logistics Agency)	$251,305	0.4%	Rank history: #48 in FY2022, #57 in FY2023, #57 in FY2024 and #52 in FY2025; up 14 since FY2020.
32	Peerless Electronics Inc. Top agencies DLA (Defense Logistics Agency)	$249,776	0.4%	Rank history: #20 in FY2022, #13 in FY2023, #42 in FY2024 and #40 in FY2025; up 9 since FY2020.
33	Transaero, Inc. Top agencies DLA (Defense Logistics Agency)	$241,648	0.3%	Rank history: #25 in FY2022, #29 in FY2023, #49 in FY2024 and #15 in FY2025; up 32 since FY2020.
34	Monaco Enterprises, Inc. Top agencies USAF (Department of the Air Force)	$224,000	0.3%	Rank history: not on the FY2022–FY2023 lists, #73 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
35	Daikin Applied Americas Inc Top agencies DOJ (Department of Justice) DOI (Department of the Interior) DOT (Department of Transportation)	$220,999	0.3%	Rank history: #5 in FY2022, #14 in FY2023, #9 in FY2024 and #3 in FY2025; up 40 since FY2020.
36	Daily Instruments Corporation Through Thermocontrol Inc. Top agencies DLA (Defense Logistics Agency)	$219,528	0.3%	Rank history: #7 in FY2022, #16 in FY2023 and not on the FY2024–FY2025 lists; down 30 since FY2020.
37	Stanley Black & Decker, Inc. Through Securitas Technology Corporation Top agencies VA (Department of Veterans Affairs) DOI (Department of the Interior) USDA (Department of Agriculture)	$196,511	0.3%	Rank history: #30 in FY2022, #96 in FY2023, #30 in FY2024 and not on the FY2025 list; down 33 since FY2020.
38	Securus Technologies, LLC Through Satellite Tracking of People LLC Top agencies CSOSA (Court Services and Offender Supervision Agency)	$195,524	0.3%	Rank history: not on the FY2022–FY2025 lists; down 14 since FY2020.
39	General Dynamics Corporation Through Electric Boat Corporation Top agencies DLA (Defense Logistics Agency)	$195,437	0.3%	Rank history: not on the FY2022–FY2025 lists; down 18 since FY2020.
40	Statz Corp Top agencies DLA (Defense Logistics Agency)	$189,110	0.3%	Rank history: #93 in FY2022 and not on the FY2023–FY2025 lists; up 149 since FY2020.
41	AGM Container Controls Inc. Top agencies DLA (Defense Logistics Agency)	$179,289	0.3%	Rank history: #36 in FY2022, #38 in FY2023, #35 in FY2024 and #62 in FY2025; down 10 since FY2020.
42	Triman Industries Inc. Top agencies DLA (Defense Logistics Agency)	$179,189	0.3%	Rank history: #86 in FY2022, #56 in FY2023, #17 in FY2024 and #16 in FY2025; up 19 since FY2020.
43	Automated Logic Contracting Services, Inc. Top agencies USDA (Department of Agriculture) USAF (Department of the Air Force)	$177,691	0.3%	Rank history: not on the FY2022–FY2025 lists; up 76 since FY2020.
44	Robert Bosch Stiftung Gesellschaft MIT Beschrankter Haftung 3 awardees, including Electro-Voice Dynacord LLC and Bosch Security Systems, Inc. Top agencies DHS (Department of Homeland Security) DOJ (Department of Justice) Smithsonian (Smithsonian Institution)	$177,042	0.3%	Rank history: #51 in FY2022 and not on the FY2023–FY2025 lists; down 37 since FY2020.
45	Careview Communications, Inc. Top agencies VA (Department of Veterans Affairs)	$175,369	0.3%	Rank history: #62 in FY2022, #66 in FY2023 and not on the FY2024–FY2025 lists; down 2 since FY2020.
46	C & C Sales Inc. Top agencies VA (Department of Veterans Affairs)	$167,160	0.2%	Rank history: #44 in FY2022, #48 in FY2023 and not on the FY2024–FY2025 lists; down 7 since FY2020.
47	Complete Packaging and Shipping Supplies, Inc. Top agencies VA (Department of Veterans Affairs)	$150,000	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
48	Galaxy Integrated Technologies, LLC Top agencies Navy (Department of the Navy)	$146,863	0.2%	Rank history: not on the FY2022–FY2025 lists; up 94 since FY2020.
49	Stealth Supply, Inc. Top agencies DLA (Defense Logistics Agency)	$145,974	0.2%	Rank history: not on the FY2022–FY2023 lists, #43 in FY2024 and not on the FY2025 list; up 23 since FY2020.
50	Native Pride Spares Inc. Top agencies DLA (Defense Logistics Agency)	$144,668	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
51	RDI Controls LLC Top agencies Navy (Department of the Navy)	$142,590	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
52	Westsim Engineering, Inc. Top agencies DLA (Defense Logistics Agency)	$138,551	0.2%	Rank history: #41 in FY2022, #53 in FY2023, #90 in FY2024 and #50 in FY2025; up 22 since FY2020.
53	Perma-Cal Industries, Inc. Top agencies DLA (Defense Logistics Agency)	$136,052	0.2%	Rank history: #43 in FY2022, #52 in FY2023, #59 in FY2024 and #32 in FY2025; down 2 since FY2020.
54	Bhayana Brothers LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$133,845	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
55	PCX Inc. Top agencies DLA (Defense Logistics Agency)	$125,524	0.2%	Rank history: not on the FY2022–FY2025 lists; up 284 since FY2020.
56	R & M Government Services Inc. Top agencies DLA (Defense Logistics Agency)	$121,567	0.2%	Rank history: #98 in FY2022, not on the FY2023 list, #36 in FY2024 and #92 in FY2025; new, not ranked in FY2020.
57	Daughtridge Sales Company, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$110,830	0.2%	Rank history: #70 in FY2022, #64 in FY2023, #84 in FY2024 and #84 in FY2025; up 13 since FY2020.
58	Detroit Switch Inc. Top agencies DLA (Defense Logistics Agency)	$108,488	0.2%	Rank history: #42 in FY2022, #47 in FY2023, #51 in FY2024 and #54 in FY2025; down 20 since FY2020.
59	Janels Industries Inc. Top agencies DLA (Defense Logistics Agency)	$107,831	0.2%	Rank history: #68 in FY2022, #36 in FY2023, #40 in FY2024 and #72 in FY2025; up 219 since FY2020.
60	Bacharach, Inc. Through Parasense, Inc. Top agencies DHS (Department of Homeland Security)	$106,744	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
61	Native Instinct LLC Top agencies USAF (Department of the Air Force)	$106,313	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
62	Fhnc Ltd. Co. Top agencies EPA (Environmental Protection Agency)	$100,000	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
63	Pride Electronics Inc. Top agencies DLA (Defense Logistics Agency)	$97,765	0.1%	Rank history: not on the FY2022–FY2025 lists; up 155 since FY2020.
64	Standard Calibrations Inc. Top agencies DLA (Defense Logistics Agency)	$95,963	0.1%	Rank history: not on the FY2022 list, #60 in FY2023, #80 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
65	United Dynamics, Inc. Top agencies DLA (Defense Logistics Agency)	$95,697	0.1%	Rank history: #85 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
66	Esco Technologies Inc. Through Vacco Industries Top agencies DLA (Defense Logistics Agency)	$92,670	0.1%	Rank history: not on the FY2022 list, #61 in FY2023, #37 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
67	Honeywell International Inc. 5 awardees, including Honeywell Building Solutions GMBH Top agencies Army (Department of the Army) NASA (National Aeronautics and Space Administration)	$92,560	0.1%	Rank history: #60 in FY2022, not on the FY2023 list, #27 in FY2024 and #21 in FY2025; down 35 since FY2020.
68	Capp LLC Top agencies DOJ (Department of Justice) Commerce (Department of Commerce) DOS (Department of State)	$90,973	0.1%	Rank history: #73 in FY2022, #86 in FY2023 and not on the FY2024–FY2025 lists; down 8 since FY2020.
69	Ontic Engineering & Manufacturing, Inc. Through Centroid, Inc. Top agencies DLA (Defense Logistics Agency)	$85,630	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
70	Meggitt PLC Through Meggitt Safety Systems Inc. Top agencies DLA (Defense Logistics Agency)	$85,525	0.1%	Rank history: not on the FY2022–FY2025 lists; down 14 since FY2020.
71	S I T Corporation Top agencies DLA (Defense Logistics Agency)	$83,510	0.1%	Rank history: not on the FY2022–FY2023 lists, #12 in FY2024 and #42 in FY2025; down 21 since FY2020.
72	King Nutronics Corporation Top agencies DLA (Defense Logistics Agency)	$81,712	0.1%	Rank history: not on the FY2022 list, #87 in FY2023 and not on the FY2024–FY2025 lists; up 150 since FY2020.
73	Building Automation Services, Inc. Top agencies DOJ (Department of Justice)	$76,800	0.1%	Rank history: #77 in FY2022, #92 in FY2023, #95 in FY2024 and not on the FY2025 list; up 12 since FY2020.
74	Ludwig Schunk Stiftung E.V. Through Weiss Technik North America, Inc. Top agencies Army (Department of the Army)	$72,560	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
75	RTX Corporation 5 awardees, including Kidde Technologies, Inc., Carrier Corporation and Rockwell Collins, Inc. Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force)	$72,427	0.1%	Rank history: not on the FY2022–FY2025 lists; down 63 since FY2020.
76	Heico Aerospace Corporat Through Seal Dynamics LLC Top agencies DLA (Defense Logistics Agency)	$71,605	0.1%	Rank history: #32 in FY2022, not on the FY2023 list, #85 in FY2024 and not on the FY2025 list; down 12 since FY2020.
77	Sandlapper Controls, Inc. Top agencies VA (Department of Veterans Affairs) DOS (Department of State)	$70,791	0.1%	Rank history: #19 in FY2022, #54 in FY2023 and not on the FY2024–FY2025 lists; down 48 since FY2020.
78	Trane U.S. Inc. Top agencies VA (Department of Veterans Affairs) DOI (Department of the Interior)	$70,781	0.1%	Rank history: not on the FY2022–FY2025 lists; up 91 since FY2020.
79	Danaher Corporation Through Pall Aeropower Corporation Top agencies DLA (Defense Logistics Agency)	$70,182	0.1%	Rank history: not on the FY2022–FY2025 lists; up 84 since FY2020.
80	ECI Defense Group, Inc. Top agencies DLA (Defense Logistics Agency)	$69,050	0.1%	Rank history: #82 in FY2022, #27 in FY2023, #47 in FY2024 and #46 in FY2025; new, not ranked in FY2020.
81	Hoosier Industrial Supply, Inc. Top agencies DLA (Defense Logistics Agency)	$68,995	0.1%	Rank history: not on the FY2022–FY2024 lists and #91 in FY2025; up 76 since FY2020.
82	Dela Technology Corporation Top agencies DLA (Defense Logistics Agency)	$67,569	0.1%	Rank history: #90 in FY2022, #80 in FY2023, #83 in FY2024 and not on the FY2025 list; up 22 since FY2020.
83	Eastern Carolina Vocational Center Inc. Top agencies Navy (Department of the Navy)	$66,056	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
84	Advanced Products Services Inc. Top agencies DLA (Defense Logistics Agency)	$65,220	0.1%	Rank history: #88 in FY2022, not on the FY2023 list, #44 in FY2024 and not on the FY2025 list; down 25 since FY2020.
85	Westbase Inc Through Phaostron Instrument and Electronic Company Top agencies DLA (Defense Logistics Agency)	$64,848	0.1%	Rank history: #71 in FY2022, #94 in FY2023, #77 in FY2024 and not on the FY2025 list; up 165 since FY2020.
86	First Nation Group LLC Top agencies VA (Department of Veterans Affairs)	$63,934	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
87	Logis-Tech, LLC Top agencies Army (Department of the Army)	$63,072	0.1%	Rank history: #22 in FY2022 and not on the FY2023–FY2025 lists; down 64 since FY2020.
88	Phoenix Trading Inc. Top agencies DLA (Defense Logistics Agency)	$62,464	0.1%	Rank history: not on the FY2022–FY2025 lists; up 3 since FY2020.
89	Temperature Technology, Inc. Top agencies HHS (Department of Health and Human Services)	$62,232	0.1%	Rank history: not on the FY2022–FY2025 lists; up 1 since FY2020.
90	Cameron Energy Services Corp. Top agencies Navy (Department of the Navy)	$58,746	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
91	E-Control Systems Inc. Top agencies HHS (Department of Health and Human Services)	$57,840	0.1%	Rank history: #59 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
92	Holloway Construction, Inc. Top agencies USAF (Department of the Air Force)	$57,531	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
93	Cameron Technologies US Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$56,943	0.1%	Rank history: not on the FY2022–FY2025 lists; up 61 since FY2020.
94	Integrated Development & Manufacturing Company Top agencies Navy (Department of the Navy) USDA (Department of Agriculture)	$55,371	0.1%	Rank history: not on the FY2022 list, #70 in FY2023, not on the FY2024 list and #25 in FY2025; up 47 since FY2020.
95	Standridge Granite Corp Top agencies DHS (Department of Homeland Security)	$53,461	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
96	Front Line Military Vehicles, Inc. Top agencies DLA (Defense Logistics Agency)	$52,895	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
97	3T Business Group LLC Top agencies VA (Department of Veterans Affairs)	$52,227	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
98	SZY Holdings, LLC Top agencies DLA (Defense Logistics Agency)	$52,183	0.1%	Rank history: not on the FY2022–FY2023 lists, #100 in FY2024 and not on the FY2025 list; up 18 since FY2020.
99	Cellkraft AB Top agencies Army (Department of the Army)	$51,352	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
100	QED Inc. Top agencies DLA (Defense Logistics Agency)	$50,142	0.1%	Rank history: not on the FY2022–FY2025 lists; down 19 since FY2020.

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100 of 374 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 $69.3 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 334512 contractors in FY2021?

1. System High Corporation ($26.5M), 2. Signet Technologies Inc. ($15.2M), 3. Finishing Systems Inc. ($2.28M), 4. Veyka Insaat Mimarlik Muhendislik Sanayi IC VE Dis Ticaret Anonim Sirketi ($1.58M), 5. Cam-Dex Corporation ($1.26M), 6. Utility Systems Solutions, Inc. ($1.04M), 7. Argo Turboserve Corporation ($990K), 8. Siemens Aktiengesellschaft ($896K), 9. Johnson Controls Security Solutions LLC ($773K), 10. Kampi Components Co Inc. ($410K).

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