Top 100 Contractors in NAICS 334512: Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use, FY2023

Name: Top 100 Contractors in NAICS 334512: Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use, FY2023
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2022 – Sep 30, 2023 Code page on GovTribe

The top 10 won 53% of FY2023 NAICS 334512 contract dollars

Contract obligations: $53,873,177 Net of deobligations, by contracts coded NAICS 334512
Contractors: 349 Parent companies with an obligation
Largest contractor: Signet Technologies Inc. $12.9 million, 22.9% 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	Signet Technologies Inc. 2 awardees Top agencies SEC (Securities and Exchange Commission) AOUSC (Administrative Office of the U.S. Courts) DOJ (Department of Justice)	$12,931,989	22.9%	Rank history: #2 in FY2021, #1 in FY2022, #1 in FY2024 and #2 in FY2025; unchanged since FY2022.
2	Teledyne Technologies Incorporated Through Teledyne Flir Defense, Inc. Top agencies Army (Department of the Army)	$4,000,000	7.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
3	EMCOR Group, Inc. 2 awardees, including Mechanical Services of Central Florida, Inc. and Mesa Energy Systems, Inc. Top agencies DHS (Department of Homeland Security) VA (Department of Veterans Affairs) DOJ (Department of Justice)	$3,668,803	6.5%	Rank history: not on the FY2021 list, #69 in FY2022 and not on the FY2024–FY2025 lists; up 66 since FY2022.
4	The Prospective Group, LLC Top agencies DOS (Department of State)	$1,999,865	3.5%	Rank history: not on the FY2021 list, #45 in FY2022, #2 in FY2024 and #1 in FY2025; up 41 since FY2022.
5	System High Corporation Top agencies OSD (Office of the Secretary of Defense) USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$1,792,636	3.2%	Rank history: #1 in FY2021, #6 in FY2022, #3 in FY2024 and #5 in FY2025; up 1 since FY2022.
6	Isotech North America Inc. Top agencies Navy (Department of the Navy)	$1,378,000	2.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
7	Centerpoint Energy, Inc. Through Energy Systems Group, LLC Top agencies GSA (General Services Administration)	$1,298,982	2.3%	Rank history: not on the FY2021 list, #3 in FY2022 and not on the FY2024–FY2025 lists; down 4 since FY2022.
8	Utility Systems Solutions, Inc. Top agencies VA (Department of Veterans Affairs)	$1,185,298	2.1%	Rank history: #6 in FY2021, #18 in FY2022, #13 in FY2024 and #9 in FY2025; up 10 since FY2022.
9	Cam-Dex Corporation Top agencies USAF (Department of the Air Force) DOI (Department of the Interior) Army (Department of the Army)	$1,007,995	1.8%	Rank history: #5 in FY2021, #9 in FY2022, #4 in FY2024 and #13 in FY2025; unchanged since FY2022.
10	AES Systems Inc. Top agencies GSA (General Services Administration) USAF (Department of the Air Force) Army (Department of the Army)	$986,401	1.7%	Rank history: #19 in FY2021, #65 in FY2022 and not on the FY2024–FY2025 lists; up 55 since FY2022.
11	Windward Enterprises, LLC Top agencies DLA (Defense Logistics Agency)	$924,514	1.6%	Rank history: #13 in FY2021, #26 in FY2022, #41 in FY2024 and #59 in FY2025; up 15 since FY2022.
12	Weathertrol Maintenance Corp Top agencies VA (Department of Veterans Affairs)	$895,795	1.6%	Rank history: not on the FY2021–FY2022 lists, #5 in FY2024 and not on the FY2025 list; new.
13	Peerless Electronics Inc. Top agencies DLA (Defense Logistics Agency)	$697,681	1.2%	Rank history: #32 in FY2021, #20 in FY2022, #42 in FY2024 and #40 in FY2025; up 7 since FY2022.
14	Daikin Applied Americas Inc 2 awardees Top agencies VA (Department of Veterans Affairs) DOT (Department of Transportation) USAF (Department of the Air Force)	$686,858	1.2%	Rank history: #35 in FY2021, #5 in FY2022, #9 in FY2024 and #3 in FY2025; down 9 since FY2022.
15	Upchurch Services LLC Top agencies USAF (Department of the Air Force)	$667,275	1.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
16	Daily Instruments Corporation Through Thermocontrol Inc. Top agencies DLA (Defense Logistics Agency)	$661,981	1.2%	Rank history: #36 in FY2021, #7 in FY2022 and not on the FY2024–FY2025 lists; down 9 since FY2022.
17	Argo Turboserve Corporation Top agencies DLA (Defense Logistics Agency)	$650,075	1.1%	Rank history: #7 in FY2021, #12 in FY2022, #22 in FY2024 and #14 in FY2025; down 5 since FY2022.
18	Transdigm Group Incorporated 2 awardees, including Harcosemco LLC and Mason Electric Co. Top agencies DLA (Defense Logistics Agency)	$614,157	1.1%	Rank history: #25 in FY2021, #49 in FY2022, #72 in FY2024 and not on the FY2025 list; up 31 since FY2022.
19	Jamaica Bearings Co., Inc. Top agencies DLA (Defense Logistics Agency)	$551,984	1.0%	Rank history: #12 in FY2021, #21 in FY2022, #29 in FY2024 and #6 in FY2025; up 2 since FY2022.
20	Digis Corporation Top agencies DOJ (Department of Justice) USAF (Department of the Air Force) DOE (Department of Energy)	$510,532	0.9%	Rank history: not on the FY2021 list, #75 in FY2022, not on the FY2024 list and #36 in FY2025; up 55 since FY2022.
21	Moog Inc. Top agencies Army (Department of the Army)	$478,044	0.8%	Rank history: not on the FY2021 list, #8 in FY2022, #38 in FY2024 and #19 in FY2025; down 13 since FY2022.
22	MMC Metrology Lab, Inc. Top agencies DLA (Defense Logistics Agency)	$475,710	0.8%	Rank history: #15 in FY2021, #27 in FY2022, #23 in FY2024 and #12 in FY2025; up 5 since FY2022.
23	Johnson Controls Security Solutions LLC 5 awardees, including Johnson Controls Inc. and Johnson Controls Navy Systems, LLC Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) DOT (Department of Transportation)	$474,952	0.8%	Rank history: #9 in FY2021, #2 in FY2022, #33 in FY2024 and #31 in FY2025; down 21 since FY2022.
24	Kulite Semiconductor Products Inc. Top agencies DLA (Defense Logistics Agency)	$463,485	0.8%	Rank history: #20 in FY2021, #33 in FY2022, #11 in FY2024 and #55 in FY2025; up 9 since FY2022.
25	Ldia Holdings, LLC Top agencies USAF (Department of the Air Force)	$456,031	0.8%	Rank history: #17 in FY2021, #4 in FY2022, #19 in FY2024 and #23 in FY2025; down 21 since FY2022.
26	Kampi Components Co Inc. Top agencies DLA (Defense Logistics Agency)	$421,187	0.7%	Rank history: #10 in FY2021, #17 in FY2022, #24 in FY2024 and #11 in FY2025; down 9 since FY2022.
27	ECI Defense Group, Inc. 2 awardees Top agencies DLA (Defense Logistics Agency)	$419,975	0.7%	Rank history: #80 in FY2021, #82 in FY2022, #47 in FY2024 and #46 in FY2025; up 55 since FY2022.
28	H C Merchandisers, Inc. Top agencies DLA (Defense Logistics Agency)	$382,100	0.7%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
29	Transaero, Inc. Top agencies DLA (Defense Logistics Agency)	$366,335	0.6%	Rank history: #33 in FY2021, #25 in FY2022, #49 in FY2024 and #15 in FY2025; down 4 since FY2022.
30	John R Seiberlich Inc. Top agencies USAF (Department of the Air Force)	$329,800	0.6%	Rank history: not on the FY2021 list, #14 in FY2022 and not on the FY2024–FY2025 lists; down 16 since FY2022.
31	RJY Group LLC Top agencies VA (Department of Veterans Affairs)	$324,392	0.6%	Rank history: not on the FY2021 list, #24 in FY2022, #16 in FY2024 and #34 in FY2025; down 7 since FY2022.
32	Pioneer Industries, LLC Top agencies DLA (Defense Logistics Agency)	$317,688	0.6%	Rank history: not on the FY2021 list, #16 in FY2022, #39 in FY2024 and #45 in FY2025; down 16 since FY2022.
33	Security & Energy Technologies Corporation Top agencies DOJ (Department of Justice) Army (Department of the Army) USDA (Department of Agriculture)	$298,541	0.5%	Rank history: #16 in FY2021, #38 in FY2022, #53 in FY2024 and #37 in FY2025; up 5 since FY2022.
34	Laurus Systems Inc. Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force) Army (Department of the Army)	$271,430	0.5%	Rank history: #26 in FY2021, #31 in FY2022, #10 in FY2024 and #4 in FY2025; down 3 since FY2022.
35	Norcatec LLC Top agencies DLA (Defense Logistics Agency)	$265,015	0.5%	Rank history: not on the FY2021–FY2022 lists, #89 in FY2024 and not on the FY2025 list; new.
36	Janels Industries Inc. Top agencies DLA (Defense Logistics Agency)	$241,512	0.4%	Rank history: #59 in FY2021, #68 in FY2022, #40 in FY2024 and #72 in FY2025; up 32 since FY2022.
37	Electro Impulse Laboratory Inc. Top agencies Navy (Department of the Navy)	$237,670	0.4%	Rank history: not on the FY2021 list, #40 in FY2022, not on the FY2024 list and #56 in FY2025; up 3 since FY2022.
38	AGM Container Controls Inc. Top agencies DLA (Defense Logistics Agency)	$231,010	0.4%	Rank history: #41 in FY2021, #36 in FY2022, #35 in FY2024 and #62 in FY2025; down 2 since FY2022.
39	Infotec Systems Corp Top agencies USDA (Department of Agriculture) DOE (Department of Energy) GSA (General Services Administration)	$217,342	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
40	Honeywell International Inc. 2 awardees, including Honeywell Aerospace International Inc. and Honeywell Building Solutions GMBH Top agencies DLA (Defense Logistics Agency) Army (Department of the Army)	$200,412	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
41	Darwin Chambers Co LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$199,340	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 71 since FY2022.
42	Advanced Control Solutions & Automation, Inc. Top agencies USDA (Department of Agriculture)	$197,911	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
43	The Veracity Group Inc. Top agencies VA (Department of Veterans Affairs)	$196,682	0.3%	Rank history: not on the FY2021–FY2022 lists, #67 in FY2024 and not on the FY2025 list; up 139 since FY2022.
44	Siemens Aktiengesellschaft Through Siemens Industry Inc. Top agencies USAF (Department of the Air Force) DOJ (Department of Justice)	$193,671	0.3%	Rank history: #8 in FY2021, #39 in FY2022 and not on the FY2024–FY2025 lists; down 5 since FY2022.
45	Stark Tech Operating Company LLC Top agencies USAF (Department of the Air Force)	$186,767	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
46	Eckelmann AG Top agencies DECA (Defense Commissary Agency)	$185,673	0.3%	Rank history: not on the FY2021 list, #37 in FY2022 and not on the FY2024–FY2025 lists; down 9 since FY2022.
47	Detroit Switch Inc. Top agencies DLA (Defense Logistics Agency)	$181,626	0.3%	Rank history: #58 in FY2021, #42 in FY2022, #51 in FY2024 and #54 in FY2025; down 5 since FY2022.
48	C & C Sales Inc. Top agencies VA (Department of Veterans Affairs)	$180,960	0.3%	Rank history: #46 in FY2021, #44 in FY2022 and not on the FY2024–FY2025 lists; down 4 since FY2022.
49	Stealth Supply Inc Top agencies DLA (Defense Logistics Agency)	$173,761	0.3%	Rank history: not on the FY2021–FY2022 lists, #43 in FY2024 and not on the FY2025 list; new.
50	Albireo Energy LLC 2 awardees, including Advanced Power Control Inc. and Alabama Controls, Inc. Top agencies DOJ (Department of Justice) DOS (Department of State)	$171,556	0.3%	Rank history: #24 in FY2021, #28 in FY2022 and not on the FY2024–FY2025 lists; down 22 since FY2022.
51	Synergetic Technologies Group, Inc. Top agencies DLA (Defense Logistics Agency)	$165,200	0.3%	Rank history: not on the FY2021 list, #83 in FY2022 and not on the FY2024–FY2025 lists; up 32 since FY2022.
52	Perma-Cal Industries, Inc. Top agencies DLA (Defense Logistics Agency)	$163,837	0.3%	Rank history: #53 in FY2021, #43 in FY2022, #59 in FY2024 and #32 in FY2025; down 9 since FY2022.
53	Westsim Engineering Inc. 2 awardees Top agencies DLA (Defense Logistics Agency)	$162,187	0.3%	Rank history: #52 in FY2021, #41 in FY2022, #90 in FY2024 and #50 in FY2025; down 12 since FY2022.
54	Sandlapper Controls, Inc. Top agencies VA (Department of Veterans Affairs)	$156,740	0.3%	Rank history: #77 in FY2021, #19 in FY2022 and not on the FY2024–FY2025 lists; down 35 since FY2022.
55	Finishing Systems Inc. Top agencies Army (Department of the Army)	$154,473	0.3%	Rank history: #3 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
56	Triman Industries Inc. 2 awardees, including Brighton Cromwell LLC Top agencies DLA (Defense Logistics Agency)	$151,850	0.3%	Rank history: #42 in FY2021, #86 in FY2022, #17 in FY2024 and #16 in FY2025; up 30 since FY2022.
57	Moeller Instrument Company, Inc. Top agencies DLA (Defense Logistics Agency)	$151,500	0.3%	Rank history: #31 in FY2021, #48 in FY2022, #57 in FY2024 and #52 in FY2025; down 9 since FY2022.
58	Jgils, LLC Top agencies DLA (Defense Logistics Agency)	$149,978	0.3%	Rank history: not on the FY2021 list, #91 in FY2022, #64 in FY2024 and #83 in FY2025; up 33 since FY2022.
59	Veterans Elite Inc. Top agencies VA (Department of Veterans Affairs)	$149,790	0.3%	Rank history: not on the FY2021 list, #35 in FY2022 and not on the FY2024–FY2025 lists; down 24 since FY2022.
60	Standard Calibrations Inc. Top agencies DLA (Defense Logistics Agency)	$147,164	0.3%	Rank history: #64 in FY2021, not on the FY2022 list, #80 in FY2024 and not on the FY2025 list; up 83 since FY2022.
61	Esco Technologies Inc. Through Vacco Industries Top agencies DLA (Defense Logistics Agency)	$146,243	0.3%	Rank history: #66 in FY2021, not on the FY2022 list, #37 in FY2024 and not on the FY2025 list; up 41 since FY2022.
62	The Churchill Companies Through TSI Incorporated Top agencies GSA (General Services Administration) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$140,563	0.2%	Rank history: not on the FY2021 list, #64 in FY2022 and not on the FY2024–FY2025 lists; up 2 since FY2022.
63	Protronic LLC Top agencies DLA (Defense Logistics Agency)	$140,426	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
64	Daughtridge Sales Company, Inc. Top agencies DLA (Defense Logistics Agency)	$129,067	0.2%	Rank history: #57 in FY2021, #70 in FY2022, #84 in FY2024 and #84 in FY2025; up 6 since FY2022.
65	RIX Industries Top agencies DLA (Defense Logistics Agency)	$124,692	0.2%	Rank history: not on the FY2021–FY2022 lists, #88 in FY2024 and not on the FY2025 list; new.
66	Careview Communications, Inc. Top agencies VA (Department of Veterans Affairs)	$124,687	0.2%	Rank history: #45 in FY2021, #62 in FY2022 and not on the FY2024–FY2025 lists; down 4 since FY2022.
67	Bollinger Shipyards Inc Through Chand, L.L.C. Top agencies DLA (Defense Logistics Agency)	$122,849	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 123 since FY2022.
68	Dreamfind, Inc. Top agencies DLA (Defense Logistics Agency)	$118,146	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 192 since FY2022.
69	Freeus LLC Top agencies VA (Department of Veterans Affairs)	$113,700	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
70	Integrated Development & Manufacturing Company Top agencies USDA (Department of Agriculture) Navy (Department of the Navy)	$110,193	0.2%	Rank history: #94 in FY2021, not on the FY2022 list, not on the FY2024 list and #25 in FY2025; up 44 since FY2022.
71	Radius Systems, LLC Top agencies Navy (Department of the Navy)	$105,277	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
72	Saje Technology LLC Top agencies VA (Department of Veterans Affairs)	$102,060	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 92 since FY2022.
73	Johnson Controls Industries 4 awardees, including Johnson Controls, Inc. and Johnson Controls Building Automation Systems, LLC Top agencies DHA (Defense Health Agency) DOS (Department of State)	$101,774	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
74	Greenhouse Solutions Acquisition, LLC Top agencies USDA (Department of Agriculture)	$99,455	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
75	Mshc, Inc. Through Huckestein Mechanical Services LLC Top agencies USAF (Department of the Air Force)	$98,850	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
76	Krismark Group, Inc. Through LKD Aerospace, LLC Top agencies DLA (Defense Logistics Agency)	$96,480	0.2%	Rank history: #27 in FY2021, #13 in FY2022, #56 in FY2024 and not on the FY2025 list; down 63 since FY2022.
77	Aviarms Support Corp Top agencies DLA (Defense Logistics Agency)	$93,058	0.2%	Rank history: not on the FY2021–FY2022 lists, #93 in FY2024 and not on the FY2025 list; up 36 since FY2022.
78	Treadwell Corporation (Delaware) Top agencies DLA (Defense Logistics Agency)	$92,911	0.2%	Rank history: not on the FY2021 list, #57 in FY2022, #79 in FY2024 and #82 in FY2025; down 21 since FY2022.
79	Qual-TEC Management Corp Through Carp Industries Corp Top agencies DLA (Defense Logistics Agency)	$92,820	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
80	Dela Technology Corporation Top agencies DLA (Defense Logistics Agency)	$91,493	0.2%	Rank history: #82 in FY2021, #90 in FY2022, #83 in FY2024 and not on the FY2025 list; up 10 since FY2022.
81	Honeywell Limited Through Honeywell Aerospace International Inc. Top agencies DLA (Defense Logistics Agency)	$87,907	0.2%	Rank history: #29 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 57 since FY2022.
82	Young Diversified Industries Top agencies DLA (Defense Logistics Agency)	$84,750	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
83	Howell Laboratories Inc. Top agencies DLA (Defense Logistics Agency)	$83,970	0.1%	Rank history: not on the FY2021 list, #54 in FY2022, not on the FY2024 list and #79 in FY2025; down 29 since FY2022.
84	GMS International Corporation Top agencies DLA (Defense Logistics Agency)	$83,675	0.1%	Rank history: not on the FY2021 list, #66 in FY2022, #46 in FY2024 and #61 in FY2025; down 18 since FY2022.
85	Sunburst Sensors, LLC Top agencies Commerce (Department of Commerce)	$81,321	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
86	Capp LLC Top agencies USDA (Department of Agriculture) DHS (Department of Homeland Security) USAF (Department of the Air Force)	$80,317	0.1%	Rank history: #68 in FY2021, #73 in FY2022 and not on the FY2024–FY2025 lists; down 13 since FY2022.
87	King Nutronics Corporation Top agencies DLA (Defense Logistics Agency)	$80,203	0.1%	Rank history: #72 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 42 since FY2022.
88	Control Products Corporation Top agencies DLA (Defense Logistics Agency)	$80,150	0.1%	Rank history: not on the FY2021 list, #52 in FY2022, #92 in FY2024 and #88 in FY2025; down 36 since FY2022.
89	Concord Components Inc. Top agencies DLA (Defense Logistics Agency)	$79,927	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
90	Larkos Packing and Distribution Inc. Top agencies DLA (Defense Logistics Agency)	$78,352	0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #76 in FY2025; up 18 since FY2022.
91	Fincantieri Marine Systems North America Inc. Top agencies DLA (Defense Logistics Agency)	$76,367	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 77 since FY2022.
92	Building Automation Services, Inc. Top agencies DOJ (Department of Justice)	$73,855	0.1%	Rank history: #73 in FY2021, #77 in FY2022, #95 in FY2024 and not on the FY2025 list; down 15 since FY2022.
93	Bahfed Corp Top agencies VA (Department of Veterans Affairs)	$73,662	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
94	Westbase Inc Through Phaostron Instrument and Electronic Company Top agencies DLA (Defense Logistics Agency)	$71,977	0.1%	Rank history: #85 in FY2021, #71 in FY2022, #77 in FY2024 and not on the FY2025 list; down 23 since FY2022.
95	FBC Enterprises LLC Top agencies DLA (Defense Logistics Agency)	$70,996	0.1%	Rank history: not on the FY2021–FY2022 lists, #14 in FY2024 and #10 in FY2025; up 6 since FY2022.
96	Stanley Black & Decker, Inc. Through Securitas Technology Corporation Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy) USDA (Department of Agriculture)	$69,595	0.1%	Rank history: #37 in FY2021, #30 in FY2022, #30 in FY2024 and not on the FY2025 list; down 66 since FY2022.
97	Chemiquip Products Co Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$69,090	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 25 since FY2022.
98	PKJ International LLC Top agencies Navy (Department of the Navy)	$68,100	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
99	Aqua-Chem, Inc. Top agencies DLA (Defense Logistics Agency)	$67,814	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 36 since FY2022.
100	Gaylord Marine Services, Inc. Top agencies Navy (Department of the Navy)	$66,980	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.

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100 of 349 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 $56.6 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 2023 ran Oct 1, 2022 – Sep 30, 2023. 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 FY2022. "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 FY2022 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 FY2023?

1. Signet Technologies Inc. ($12.9M), 2. Teledyne Technologies Incorporated ($4M), 3. EMCOR Group, Inc. ($3.67M), 4. The Prospective Group, LLC ($2M), 5. System High Corporation ($1.79M), 6. Isotech North America Inc. ($1.38M), 7. Centerpoint Energy, Inc. ($1.3M), 8. Utility Systems Solutions, Inc. ($1.19M), 9. Cam-Dex Corporation ($1.01M), 10. AES Systems Inc. ($986K).

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