Exhibit 22.1

GUARANTOR SUBSIDIARIES OF HEICO CORPORATION

As of October 31, 2023, the following subsidiaries of HEICO Corporation are guarantors of the Company’s 5.25% Senior Notes due 2028 and 5.35% Senior Notes due 2033:

Name			Name
16-1741 Property, Inc.			Decavo LLC
26 Ward Hill Property, LLC			Dielectric Sciences, Inc.
3 McCrea Property Company, LLC			Dixie Aerospace, LLC
34 Freedom Court, Corp.			Dukane Seacom, Inc.
3D Plus U.S.A., Inc.			Engineering Design Team, Inc.
60 Sequin LLC			Flight Microwave Corporation
8929 Fullbright Property, LLC			Fortner Eng. & Mfg. Inc.
Absolute Aviation Services, LLC			Future Aviation, Inc.
Accessory Technologies Corporation			Harter Aerospace, LLC
Accurate Metal Machining, Inc.			HEICO Aerospace Corporation
Action Research Corporation			HEICO Aerospace Holdings Corp.
Aero-Glen International, LLC			HEICO Aerospace Parts Corp.
AeroAntenna Technology, Inc.			HEICO East Corporation
AeroDesign, Inc.			HEICO Electronic Technologies Corp.
AeroELT, LLC			HEICO Flight Support Corp.
Aerospace & Commercial Technologies, LLC			HEICO Parts Group, Inc.
Aerospace Coatings International, LLC			HEICO Repair Group Aerostructures, LLC
Aircraft Technology, Inc.			HEICO Repair, LLC
Analog Modules, Inc.			HETC I, LLC
Apex Holding Corp.			HETC II Corp.
Apex Microtechnology, Inc.			HETC III, LLC
ASC International, Inc.			HETC IV, LLC
Astro Property, LLC			HETC V, LLC
Astroseal Products Mfg. Corporation			HFSC III Corp.
Aviatron, Inc.			HFSC IV Corp.
Bay Equipment Corp.			HFSC V, LLC
Blue Aerospace LLC			HFSC VI, LLC
Breidon, LLC			HFSC VII, LLC
Camtronics, LLC			HFSC VIII, LLC
Carbon by Design Corporation			HFSC XI Corp.
Carbon by Design LLC			HNW2 Building Corp.
Charter Engineering, Inc.			HNW Building Corp.
Connectronics Corp.			HVT Group, Inc.
Conxall Corporation			Inertial Airline Services, Inc.
CSI Aerospace, Inc.			Intelligent Devices, LLC
dB Control Corp.			IRCameras LLC

Name			Name
Ironwood Electronics, Inc.			Robertson Fuel Systems, L.L.C.
Jet Avion Corporation			Rocky Mountain Hydrostatics, LLC
Jetseal, Inc.			Santa Barbara Infrared, Inc.
Kitco, LLC			Seal Dynamics LLC
Leader Tech, Inc.			Seal Q Corp.
LPI Industries Corporation			Sensor Systems, Inc.
Lucix Corporation			Sensor Technology Engineering, LLC
Lumina Power, Inc.			Sierra Microwave Technology, LLC
Mastiff Design, Inc.			Silver Wings Aerospace, Inc.
McClain International, Inc.			Solid Sealing Technology, Inc.
Midwest Microwave Solutions, Inc.			Soundair Repair Group, LLC
Niacc-Avitech Technologies Inc.			Specialty Silicone Products, Inc.
Northwings Accessories Corp.			Sunshine Avionics LLC
Optical Display Engineering, Inc.			Switchcraft Holdco, Inc.
Optical Display Engineering, LLC			Switchcraft, Inc.
Paciwave, Inc.			The Bechdon Company, LLC
PHS / MWA			Thermal Energy Products, Inc.
Pioneer Industries, LLC			Thermal Structures, Inc.
Prime Air, LLC			Trad Tests & Radiations, Inc.
Pyramid Semiconductor Corp.			Transformational Security, LLC
Quell Corporation			TSID Holdings, LLC
R.H. Laboratories, Inc.			TTT-Cubed, Inc.
Radiant Power Corp.			Turbine Kinetics, Inc.
Radiant Power IDC, LLC			Wencor Acquisition, Inc.
Radiant-Seacom Repairs Corp.			Wencor Defense Intermediate Holdco, LLC
Ramona Research, Inc.			Wencor Defense, LLC
Reinhold Holdings, Inc.			Wencor Group, LLC
Reinhold Industries, Inc.			Wencor Investment I, LLC
Research Electronics International, L.L.C.			Wencor MRO, LLC
Ridge Engineering, LLC			Wencor Parent, Inc.
Ridge HoldCo, LLC			Wencor, LLC