HEICO Corporation, through its subsidiaries, engages in the design, manufacture, and sale of aerospace, defense, and electronics related products and services in the United States and internationally.

The company operates through two segments, Flight Support Group (FSG/HEICO Aerospace) and Electronic Technologies Group (ETG). HEICO Aerospace offers jet engine and aircraft component replacement parts. It also involves in manufacturing specialty aircraft/defense related parts; offering thermal insulation blankets primarily for aerospace, defense, and commercial applications; subcontracting for original equipment manufacturers (OEMs); providing specialty parts as a subcontractor for aerospace and industrial OEMs, and the United States government. In addition, this segment distributes hydraulic, pneumatic, mechanical, and electro-mechanical components for the aviation markets.